diff --git a/bsc1174736-DFLTCC_LEVEL_MASK-set-to-0x1ff.patch b/bsc1174736-DFLTCC_LEVEL_MASK-set-to-0x1ff.patch
deleted file mode 100644
index 4022f15..0000000
--- a/bsc1174736-DFLTCC_LEVEL_MASK-set-to-0x1ff.patch
+++ /dev/null
@@ -1,50 +0,0 @@
-Index: zlib-1.2.11/deflate.c
-===================================================================
---- zlib-1.2.11.orig/deflate.c
-+++ zlib-1.2.11/deflate.c
-@@ -504,7 +504,7 @@ int ZEXPORT deflateResetKeep (strm)
-         s->wrap == 2 ? crc32(0L, Z_NULL, 0) :
- #endif
-         adler32(0L, Z_NULL, 0);
--    s->last_flush = Z_NO_FLUSH;
-+    s->last_flush = -2;
- 
-     _tr_init(s);
- 
-@@ -582,12 +582,12 @@ int ZEXPORT deflateParams(strm, level, s
-     func = configuration_table[s->level].func;
- 
-     if ((strategy != s->strategy || func != configuration_table[level].func) &&
--        s->high_water) {
-+        s->last_flush != -2) {
-         /* Flush the last buffer: */
-         int err = deflate(strm, Z_BLOCK);
-         if (err == Z_STREAM_ERROR)
-             return err;
--        if (strm->avail_out == 0)
-+        if (strm->avail_in || (s->strstart - s->block_start) + s->lookahead)
-             return Z_BUF_ERROR;
-     }
-     if (s->level != level) {
-Index: zlib-1.2.11/zlib.h
-===================================================================
---- zlib-1.2.11.orig/zlib.h
-+++ zlib-1.2.11/zlib.h
-@@ -712,11 +712,12 @@ ZEXTERN int ZEXPORT deflateParams OF((z_
-    used to switch between compression and straight copy of the input data, or
-    to switch to a different kind of input data requiring a different strategy.
-    If the compression approach (which is a function of the level) or the
--   strategy is changed, and if any input has been consumed in a previous
--   deflate() call, then the input available so far is compressed with the old
--   level and strategy using deflate(strm, Z_BLOCK).  There are three approaches
--   for the compression levels 0, 1..3, and 4..9 respectively.  The new level
--   and strategy will take effect at the next call of deflate().
-+   strategy is changed, and if there have been any deflate() calls since the
-+   state was initialized or reset, then the input available so far is
-+   compressed with the old level and strategy using deflate(strm, Z_BLOCK).
-+   There are three approaches for the compression levels 0, 1..3, and 4..9
-+   respectively.  The new level and strategy will take effect at the next call
-+   of deflate().
- 
-      If a deflate(strm, Z_BLOCK) is performed by deflateParams(), and it does
-    not have enough output space to complete, then the parameter change will not
diff --git a/bsc1197459.patch b/bsc1197459.patch
deleted file mode 100644
index b40f376..0000000
--- a/bsc1197459.patch
+++ /dev/null
@@ -1,343 +0,0 @@
-From 5c44459c3b28a9bd3283aaceab7c615f8020c531 Mon Sep 17 00:00:00 2001
-From: Mark Adler <madler@alumni.caltech.edu>
-Date: Tue, 17 Apr 2018 22:09:22 -0700
-Subject: [PATCH] Fix a bug that can crash deflate on some input when using
- Z_FIXED.
-
-This bug was reported by Danilo Ramos of Eideticom, Inc. It has
-lain in wait 13 years before being found! The bug was introduced
-in zlib 1.2.2.2, with the addition of the Z_FIXED option. That
-option forces the use of fixed Huffman codes. For rare inputs with
-a large number of distant matches, the pending buffer into which
-the compressed data is written can overwrite the distance symbol
-table which it overlays. That results in corrupted output due to
-invalid distances, and can result in out-of-bound accesses,
-crashing the application.
-
-The fix here combines the distance buffer and literal/length
-buffers into a single symbol buffer. Now three bytes of pending
-buffer space are opened up for each literal or length/distance
-pair consumed, instead of the previous two bytes. This assures
-that the pending buffer cannot overwrite the symbol table, since
-the maximum fixed code compressed length/distance is 31 bits, and
-since there are four bytes of pending space for every three bytes
-of symbol space.
----
- deflate.c | 74 ++++++++++++++++++++++++++++++++++++++++---------------
- deflate.h | 25 +++++++++----------
- trees.c   | 50 +++++++++++--------------------------
- 3 files changed, 79 insertions(+), 70 deletions(-)
-
-Index: zlib-1.2.11/deflate.c
-===================================================================
---- zlib-1.2.11.orig/deflate.c
-+++ zlib-1.2.11/deflate.c
-@@ -251,11 +251,6 @@ int ZEXPORT deflateInit2_(strm, level, m
-     deflate_state *s;
-     int wrap = 1;
- 
--    ushf *overlay;
--    /* We overlay pending_buf and d_buf+l_buf. This works since the average
--     * output size for (length,distance) codes is <= 24 bits.
--     */
--
-     if (strm == Z_NULL) return Z_STREAM_ERROR;
- 
-     strm->msg = Z_NULL;
-@@ -321,9 +316,47 @@ int ZEXPORT deflateInit2_(strm, level, m
- 
-     s->lit_bufsize = 1 << (memLevel + 6); /* 16K elements by default */
- 
--    overlay = (ushf *) ZALLOC(strm, s->lit_bufsize, sizeof(ush)+2);
--    s->pending_buf = (uchf *) overlay;
--    s->pending_buf_size = (ulg)s->lit_bufsize * (sizeof(ush)+2L);
-+    /* We overlay pending_buf and sym_buf. This works since the average size
-+     * for length/distance pairs over any compressed block is assured to be 31
-+     * bits or less.
-+     *
-+     * Analysis: The longest fixed codes are a length code of 8 bits plus 5
-+     * extra bits, for lengths 131 to 257. The longest fixed distance codes are
-+     * 5 bits plus 13 extra bits, for distances 16385 to 32768. The longest
-+     * possible fixed-codes length/distance pair is then 31 bits total.
-+     *
-+     * sym_buf starts one-fourth of the way into pending_buf. So there are
-+     * three bytes in sym_buf for every four bytes in pending_buf. Each symbol
-+     * in sym_buf is three bytes -- two for the distance and one for the
-+     * literal/length. As each symbol is consumed, the pointer to the next
-+     * sym_buf value to read moves forward three bytes. From that symbol, up to
-+     * 31 bits are written to pending_buf. The closest the written pending_buf
-+     * bits gets to the next sym_buf symbol to read is just before the last
-+     * code is written. At that time, 31*(n-2) bits have been written, just
-+     * after 24*(n-2) bits have been consumed from sym_buf. sym_buf starts at
-+     * 8*n bits into pending_buf. (Note that the symbol buffer fills when n-1
-+     * symbols are written.) The closest the writing gets to what is unread is
-+     * then n+14 bits. Here n is lit_bufsize, which is 16384 by default, and
-+     * can range from 128 to 32768.
-+     *
-+     * Therefore, at a minimum, there are 142 bits of space between what is
-+     * written and what is read in the overlain buffers, so the symbols cannot
-+     * be overwritten by the compressed data. That space is actually 139 bits,
-+     * due to the three-bit fixed-code block header.
-+     *
-+     * That covers the case where either Z_FIXED is specified, forcing fixed
-+     * codes, or when the use of fixed codes is chosen, because that choice
-+     * results in a smaller compressed block than dynamic codes. That latter
-+     * condition then assures that the above analysis also covers all dynamic
-+     * blocks. A dynamic-code block will only be chosen to be emitted if it has
-+     * fewer bits than a fixed-code block would for the same set of symbols.
-+     * Therefore its average symbol length is assured to be less than 31. So
-+     * the compressed data for a dynamic block also cannot overwrite the
-+     * symbols from which it is being constructed.
-+     */
-+
-+    s->pending_buf = (uchf *) ZALLOC(strm, s->lit_bufsize, 4);
-+    s->pending_buf_size = (ulg)s->lit_bufsize * 4;
- 
-     if (s->window == Z_NULL || s->prev == Z_NULL || s->head == Z_NULL ||
-         s->pending_buf == Z_NULL) {
-@@ -332,8 +365,12 @@ int ZEXPORT deflateInit2_(strm, level, m
-         deflateEnd (strm);
-         return Z_MEM_ERROR;
-     }
--    s->d_buf = overlay + s->lit_bufsize/sizeof(ush);
--    s->l_buf = s->pending_buf + (1+sizeof(ush))*s->lit_bufsize;
-+    s->sym_buf = s->pending_buf + s->lit_bufsize;
-+    s->sym_end = (s->lit_bufsize - 1) * 3;
-+    /* We avoid equality with lit_bufsize*3 because of wraparound at 64K
-+     * on 16 bit machines and because stored blocks are restricted to
-+     * 64K-1 bytes.
-+     */
- 
-     s->level = level;
-     s->strategy = strategy;
-@@ -544,7 +581,7 @@ int ZEXPORT deflatePrime (strm, bits, va
- 
-     if (deflateStateCheck(strm)) return Z_STREAM_ERROR;
-     s = strm->state;
--    if ((Bytef *)(s->d_buf) < s->pending_out + ((Buf_size + 7) >> 3))
-+    if (s->sym_buf < s->pending_out + ((Buf_size + 7) >> 3))
-         return Z_BUF_ERROR;
-     do {
-         put = Buf_size - s->bi_valid;
-@@ -1103,7 +1140,6 @@ int ZEXPORT deflateCopy (dest, source)
- #else
-     deflate_state *ds;
-     deflate_state *ss;
--    ushf *overlay;
- 
- 
-     if (deflateStateCheck(source) || dest == Z_NULL) {
-@@ -1123,8 +1159,7 @@ int ZEXPORT deflateCopy (dest, source)
-     ds->window = (Bytef *) ZALLOC(dest, ds->w_size, 2*sizeof(Byte));
-     ds->prev   = (Posf *)  ZALLOC(dest, ds->w_size, sizeof(Pos));
-     ds->head   = (Posf *)  ZALLOC(dest, ds->hash_size, sizeof(Pos));
--    overlay = (ushf *) ZALLOC(dest, ds->lit_bufsize, sizeof(ush)+2);
--    ds->pending_buf = (uchf *) overlay;
-+    ds->pending_buf = (uchf *) ZALLOC(dest, ds->lit_bufsize, 4);
- 
-     if (ds->window == Z_NULL || ds->prev == Z_NULL || ds->head == Z_NULL ||
-         ds->pending_buf == Z_NULL) {
-@@ -1138,8 +1173,7 @@ int ZEXPORT deflateCopy (dest, source)
-     zmemcpy(ds->pending_buf, ss->pending_buf, (uInt)ds->pending_buf_size);
- 
-     ds->pending_out = ds->pending_buf + (ss->pending_out - ss->pending_buf);
--    ds->d_buf = overlay + ds->lit_bufsize/sizeof(ush);
--    ds->l_buf = ds->pending_buf + (1+sizeof(ush))*ds->lit_bufsize;
-+    ds->sym_buf = ds->pending_buf + ds->lit_bufsize;
- 
-     ds->l_desc.dyn_tree = ds->dyn_ltree;
-     ds->d_desc.dyn_tree = ds->dyn_dtree;
-@@ -1911,7 +1945,7 @@ local block_state deflate_fast(s, flush)
-         FLUSH_BLOCK(s, 1);
-         return finish_done;
-     }
--    if (s->last_lit)
-+    if (s->sym_next)
-         FLUSH_BLOCK(s, 0);
-     return block_done;
- }
-@@ -2042,7 +2076,7 @@ local block_state deflate_slow(s, flush)
-         FLUSH_BLOCK(s, 1);
-         return finish_done;
-     }
--    if (s->last_lit)
-+    if (s->sym_next)
-         FLUSH_BLOCK(s, 0);
-     return block_done;
- }
-@@ -2117,7 +2151,7 @@ local block_state deflate_rle(s, flush)
-         FLUSH_BLOCK(s, 1);
-         return finish_done;
-     }
--    if (s->last_lit)
-+    if (s->sym_next)
-         FLUSH_BLOCK(s, 0);
-     return block_done;
- }
-@@ -2156,7 +2190,7 @@ local block_state deflate_huff(s, flush)
-         FLUSH_BLOCK(s, 1);
-         return finish_done;
-     }
--    if (s->last_lit)
-+    if (s->sym_next)
-         FLUSH_BLOCK(s, 0);
-     return block_done;
- }
-Index: zlib-1.2.11/deflate.h
-===================================================================
---- zlib-1.2.11.orig/deflate.h
-+++ zlib-1.2.11/deflate.h
-@@ -217,7 +217,7 @@ typedef struct internal_state {
-     /* Depth of each subtree used as tie breaker for trees of equal frequency
-      */
- 
--    uchf *l_buf;          /* buffer for literals or lengths */
-+    uchf *sym_buf;        /* buffer for distances and literals/lengths */
- 
-     uInt  lit_bufsize;
-     /* Size of match buffer for literals/lengths.  There are 4 reasons for
-@@ -239,13 +239,8 @@ typedef struct internal_state {
-      *   - I can't count above 4
-      */
- 
--    uInt last_lit;      /* running index in l_buf */
--
--    ushf *d_buf;
--    /* Buffer for distances. To simplify the code, d_buf and l_buf have
--     * the same number of elements. To use different lengths, an extra flag
--     * array would be necessary.
--     */
-+    uInt sym_next;      /* running index in sym_buf */
-+    uInt sym_end;       /* symbol table full when sym_next reaches this */
- 
-     ulg opt_len;        /* bit length of current block with optimal trees */
-     ulg static_len;     /* bit length of current block with static trees */
-@@ -325,20 +320,22 @@ void ZLIB_INTERNAL _tr_stored_block OF((
- 
- # define _tr_tally_lit(s, c, flush) \
-   { uch cc = (c); \
--    s->d_buf[s->last_lit] = 0; \
--    s->l_buf[s->last_lit++] = cc; \
-+    s->sym_buf[s->sym_next++] = 0; \
-+    s->sym_buf[s->sym_next++] = 0; \
-+    s->sym_buf[s->sym_next++] = cc; \
-     s->dyn_ltree[cc].Freq++; \
--    flush = (s->last_lit == s->lit_bufsize-1); \
-+    flush = (s->sym_next == s->sym_end); \
-    }
- # define _tr_tally_dist(s, distance, length, flush) \
-   { uch len = (uch)(length); \
-     ush dist = (ush)(distance); \
--    s->d_buf[s->last_lit] = dist; \
--    s->l_buf[s->last_lit++] = len; \
-+    s->sym_buf[s->sym_next++] = dist; \
-+    s->sym_buf[s->sym_next++] = dist >> 8; \
-+    s->sym_buf[s->sym_next++] = len; \
-     dist--; \
-     s->dyn_ltree[_length_code[len]+LITERALS+1].Freq++; \
-     s->dyn_dtree[d_code(dist)].Freq++; \
--    flush = (s->last_lit == s->lit_bufsize-1); \
-+    flush = (s->sym_next == s->sym_end); \
-   }
- #else
- # define _tr_tally_lit(s, c, flush) flush = _tr_tally(s, 0, c)
-Index: zlib-1.2.11/trees.c
-===================================================================
---- zlib-1.2.11.orig/trees.c
-+++ zlib-1.2.11/trees.c
-@@ -416,7 +416,7 @@ local void init_block(s)
- 
-     s->dyn_ltree[END_BLOCK].Freq = 1;
-     s->opt_len = s->static_len = 0L;
--    s->last_lit = s->matches = 0;
-+    s->sym_next = s->matches = 0;
- }
- 
- #define SMALLEST 1
-@@ -947,7 +947,7 @@ void ZLIB_INTERNAL _tr_flush_block(s, bu
- 
-         Tracev((stderr, "\nopt %lu(%lu) stat %lu(%lu) stored %lu lit %u ",
-                 opt_lenb, s->opt_len, static_lenb, s->static_len, stored_len,
--                s->last_lit));
-+                s->sym_next / 3));
- 
-         if (static_lenb <= opt_lenb) opt_lenb = static_lenb;
- 
-@@ -1016,8 +1016,9 @@ int ZLIB_INTERNAL _tr_tally (s, dist, lc
-     unsigned dist;  /* distance of matched string */
-     unsigned lc;    /* match length-MIN_MATCH or unmatched char (if dist==0) */
- {
--    s->d_buf[s->last_lit] = (ush)dist;
--    s->l_buf[s->last_lit++] = (uch)lc;
-+    s->sym_buf[s->sym_next++] = dist;
-+    s->sym_buf[s->sym_next++] = dist >> 8;
-+    s->sym_buf[s->sym_next++] = lc;
-     if (dist == 0) {
-         /* lc is the unmatched char */
-         s->dyn_ltree[lc].Freq++;
-@@ -1032,30 +1033,7 @@ int ZLIB_INTERNAL _tr_tally (s, dist, lc
-         s->dyn_ltree[_length_code[lc]+LITERALS+1].Freq++;
-         s->dyn_dtree[d_code(dist)].Freq++;
-     }
--
--#ifdef TRUNCATE_BLOCK
--    /* Try to guess if it is profitable to stop the current block here */
--    if ((s->last_lit & 0x1fff) == 0 && s->level > 2) {
--        /* Compute an upper bound for the compressed length */
--        ulg out_length = (ulg)s->last_lit*8L;
--        ulg in_length = (ulg)((long)s->strstart - s->block_start);
--        int dcode;
--        for (dcode = 0; dcode < D_CODES; dcode++) {
--            out_length += (ulg)s->dyn_dtree[dcode].Freq *
--                (5L+extra_dbits[dcode]);
--        }
--        out_length >>= 3;
--        Tracev((stderr,"\nlast_lit %u, in %ld, out ~%ld(%ld%%) ",
--               s->last_lit, in_length, out_length,
--               100L - out_length*100L/in_length));
--        if (s->matches < s->last_lit/2 && out_length < in_length/2) return 1;
--    }
--#endif
--    return (s->last_lit == s->lit_bufsize-1);
--    /* We avoid equality with lit_bufsize because of wraparound at 64K
--     * on 16 bit machines and because stored blocks are restricted to
--     * 64K-1 bytes.
--     */
-+    return (s->sym_next == s->sym_end);
- }
- 
- /* ===========================================================================
-@@ -1068,13 +1046,14 @@ local void compress_block(s, ltree, dtre
- {
-     unsigned dist;      /* distance of matched string */
-     int lc;             /* match length or unmatched char (if dist == 0) */
--    unsigned lx = 0;    /* running index in l_buf */
-+    unsigned sx = 0;    /* running index in sym_buf */
-     unsigned code;      /* the code to send */
-     int extra;          /* number of extra bits to send */
- 
--    if (s->last_lit != 0) do {
--        dist = s->d_buf[lx];
--        lc = s->l_buf[lx++];
-+    if (s->sym_next != 0) do {
-+        dist = s->sym_buf[sx++] & 0xff;
-+        dist += (unsigned)(s->sym_buf[sx++] & 0xff) << 8;
-+        lc = s->sym_buf[sx++];
-         if (dist == 0) {
-             send_code(s, lc, ltree); /* send a literal byte */
-             Tracecv(isgraph(lc), (stderr," '%c' ", lc));
-@@ -1099,11 +1078,10 @@ local void compress_block(s, ltree, dtre
-             }
-         } /* literal or match pair ? */
- 
--        /* Check that the overlay between pending_buf and d_buf+l_buf is ok: */
--        Assert((uInt)(s->pending) < s->lit_bufsize + 2*lx,
--               "pendingBuf overflow");
-+        /* Check that the overlay between pending_buf and sym_buf is ok: */
-+        Assert(s->pending < s->lit_bufsize + sx, "pendingBuf overflow");
- 
--    } while (lx < s->last_lit);
-+    } while (sx < s->sym_next);
- 
-     send_code(s, END_BLOCK, ltree);
- }
diff --git a/zlib-1.2.11-covscan-issues-rhel9.patch b/zlib-1.2.11-covscan-issues-rhel9.patch
new file mode 100644
index 0000000..76cd370
--- /dev/null
+++ b/zlib-1.2.11-covscan-issues-rhel9.patch
@@ -0,0 +1,28 @@
+From a7d3c3076dc316f1408f56af86a72a17fcfdf5dd Mon Sep 17 00:00:00 2001
+From: Ilya Leoshkevich <iii@linux.ibm.com>
+Date: Wed, 27 Apr 2022 14:37:54 +0200
+Subject: [PATCH] zlib-1.2.11-covscan-issues-rhel9.patch
+
+---
+ contrib/minizip/mztools.c | 8 ++++++++
+ 1 file changed, 8 insertions(+)
+
+diff --git a/contrib/minizip/mztools.c b/contrib/minizip/mztools.c
+index 96891c2e0..1197928a7 100644
+--- a/contrib/minizip/mztools.c
++++ b/contrib/minizip/mztools.c
+@@ -286,6 +286,14 @@ uLong* bytesRecovered;
+     }
+   } else {
+     err = Z_STREAM_ERROR;
++    if(fpZip != NULL)
++      fclose(fpZip);
++
++    if(fpOut != NULL)
++      fclose(fpOut);
++
++    if(fpOutCD != NULL)
++      fclose(fpOutCD);
+   }
+   return err;
+ }
diff --git a/zlib-1.2.11-covscan-issues.patch b/zlib-1.2.11-covscan-issues.patch
new file mode 100644
index 0000000..82cf360
--- /dev/null
+++ b/zlib-1.2.11-covscan-issues.patch
@@ -0,0 +1,22 @@
+From e4c0c07385f80e260f1f1aa2a80c41c62754b9d4 Mon Sep 17 00:00:00 2001
+From: Ilya Leoshkevich <iii@linux.ibm.com>
+Date: Wed, 27 Apr 2022 14:37:39 +0200
+Subject: [PATCH] zlib-1.2.11-covscan-issues.patch
+
+---
+ deflate.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/deflate.c b/deflate.c
+index ac0b865a4..49f056a00 100644
+--- a/deflate.c
++++ b/deflate.c
+@@ -1062,7 +1062,7 @@ int ZEXPORT deflate (strm, flush)
+      */
+     if (strm->avail_in != 0 || s->lookahead != 0 ||
+         (flush != Z_NO_FLUSH && s->status != FINISH_STATE)) {
+-        block_state bstate;
++        block_state bstate = 0;
+ 
+         bstate = DEFLATE_HOOK(strm, flush, &bstate) ? bstate :
+                  s->level == 0 ? deflate_stored(s, flush) :
diff --git a/zlib-1.2.11.tar.gz b/zlib-1.2.11.tar.gz
deleted file mode 100644
index 97e86ef..0000000
--- a/zlib-1.2.11.tar.gz
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:c3e5e9fdd5004dcb542feda5ee4f0ff0744628baf8ed2dd5d66f8ca1197cb1a1
-size 607698
diff --git a/zlib-1.2.11.tar.gz.asc b/zlib-1.2.11.tar.gz.asc
deleted file mode 100644
index accd4d2..0000000
--- a/zlib-1.2.11.tar.gz.asc
+++ /dev/null
@@ -1,7 +0,0 @@
------BEGIN PGP SIGNATURE-----
-Comment: GPGTools - http://gpgtools.org
-
-iD8DBQBYe7UDeD/Njli8r7oRAgRsAJ4mHDka1VqgCYija3bLjGMyD+tohACg+y+d
-JCGR0qc+wctJGy2vEg5nDqk=
-=8VNa
------END PGP SIGNATURE-----
diff --git a/410.patch b/zlib-1.2.12-IBM-Z-hw-accelerated-deflate-s390x.patch
similarity index 88%
rename from 410.patch
rename to zlib-1.2.12-IBM-Z-hw-accelerated-deflate-s390x.patch
index bfc726f..7376951 100644
--- a/410.patch
+++ b/zlib-1.2.12-IBM-Z-hw-accelerated-deflate-s390x.patch
@@ -1,99 +1,8 @@
-From b25781e735363e04f6c56e21431c47e4afc50b17 Mon Sep 17 00:00:00 2001
+From e1d7e6dc9698968a8536b00ebd9e9b4e429b4306 Mon Sep 17 00:00:00 2001
 From: Ilya Leoshkevich <iii@linux.ibm.com>
-Date: Wed, 18 Jul 2018 13:14:07 +0200
-Subject: [PATCH] Add support for IBM Z hardware-accelerated deflate
+Date: Wed, 27 Apr 2022 14:37:24 +0200
+Subject: [PATCH] zlib-1.2.12-IBM-Z-hw-accelrated-deflate-s390x.patch
 
-IBM Z mainframes starting from version z15 provide DFLTCC instruction,
-which implements deflate algorithm in hardware with estimated
-compression and decompression performance orders of magnitude faster
-than the current zlib and ratio comparable with that of level 1.
-
-This patch adds DFLTCC support to zlib. In order to enable it, the
-following build commands should be used:
-
-    $ ./configure --dfltcc
-    $ make
-
-When built like this, zlib would compress in hardware on level 1, and in
-software on all other levels. Decompression will always happen in
-hardware. In order to enable DFLTCC compression for levels 1-6 (i.e. to
-make it used by default) one could either configure with
---dfltcc-level-mask=0x7e or set the environment variable
-DFLTCC_LEVEL_MASK to 0x7e at run time.
-
-Two DFLTCC compression calls produce the same results only when they
-both are made on machines of the same generation, and when the
-respective buffers have the same offset relative to the start of the
-page. Therefore care should be taken when using hardware compression
-when reproducible results are desired. One such use case - reproducible
-software builds - is handled explicitly: when SOURCE_DATE_EPOCH
-environment variable is set, the hardware compression is disabled.
-
-DFLTCC does not support every single zlib feature, in particular:
-
-    * inflate(Z_BLOCK) and inflate(Z_TREES)
-    * inflateMark()
-    * inflatePrime()
-    * inflateSyncPoint()
-
-When used, these functions will either switch to software, or, in case
-this is not possible, gracefully fail.
-
-This patch tries to add DFLTCC support in the least intrusive way.
-All SystemZ-specific code is placed into a separate file, but
-unfortunately there is still a noticeable amount of changes in the
-main zlib code. Below is the summary of these changes.
-
-DFLTCC takes as arguments a parameter block, an input buffer, an output
-buffer and a window. Since DFLTCC requires parameter block to be
-doubleword-aligned, and it's reasonable to allocate it alongside
-deflate and inflate states, ZALLOC_STATE, ZFREE_STATE and ZCOPY_STATE
-macros were introduced in order to encapsulate the allocation details.
-The same is true for window, for which ZALLOC_WINDOW and
-TRY_FREE_WINDOW macros were introduced.
-
-While for inflate software and hardware window formats match, this is
-not the case for deflate. Therefore, deflateSetDictionary and
-deflateGetDictionary need special handling, which is triggered using the
-new DEFLATE_SET_DICTIONARY_HOOK and DEFLATE_GET_DICTIONARY_HOOK macros.
-
-deflateResetKeep() and inflateResetKeep() now update the DFLTCC
-parameter block, which is allocated alongside zlib state, using
-the new DEFLATE_RESET_KEEP_HOOK and INFLATE_RESET_KEEP_HOOK macros.
-
-The new DEFLATE_PARAMS_HOOK switches between hardware and software
-deflate implementations when deflateParams() arguments demand this.
-
-The new INFLATE_PRIME_HOOK, INFLATE_MARK_HOOK and
-INFLATE_SYNC_POINT_HOOK macros make the respective unsupported calls
-gracefully fail.
-
-The algorithm implemented in hardware has different compression ratio
-than the one implemented in software. In order for deflateBound() to
-return the correct results for the hardware implementation, the new
-DEFLATE_BOUND_ADJUST_COMPLEN and DEFLATE_NEED_CONSERVATIVE_BOUND macros
-were introduced.
-
-Actual compression and decompression are handled by the new DEFLATE_HOOK
-and INFLATE_TYPEDO_HOOK macros. Since inflation with DFLTCC manages the
-window on its own, calling updatewindow() is suppressed using the new
-INFLATE_NEED_UPDATEWINDOW() macro.
-
-In addition to compression, DFLTCC computes CRC-32 and Adler-32
-checksums, therefore, whenever it's used, software checksumming needs to
-be suppressed using the new DEFLATE_NEED_CHECKSUM and
-INFLATE_NEED_CHECKSUM macros.
-
-DFLTCC will refuse to write an End-of-block Symbol if there is no input
-data, thus in some cases it is necessary to do this manually. In order
-to achieve this, send_bits, bi_reverse, bi_windup and flush_pending
-were promoted from local to ZLIB_INTERNAL. Furthermore, since block and
-stream termination must be handled in software as well, block_state enum
-was moved to deflate.h.
-
-Since the first call to dfltcc_inflate already needs the window, and it
-might be not allocated yet, inflate_ensure_window was factored out of
-updatewindow and made ZLIB_INTERNAL.
 ---
  Makefile.in                   |   8 +
  compress.c                    |  14 +-
@@ -118,10 +27,10 @@ updatewindow and made ZLIB_INTERNAL.
  create mode 100644 contrib/s390/dfltcc.h
  create mode 100644 contrib/s390/dfltcc_deflate.h
 
-Index: zlib-1.2.11/Makefile.in
+Index: zlib-1.2.12/Makefile.in
 ===================================================================
---- zlib-1.2.11.orig/Makefile.in
-+++ zlib-1.2.11/Makefile.in
+--- zlib-1.2.12.orig/Makefile.in
++++ zlib-1.2.12/Makefile.in
 @@ -143,6 +143,14 @@ match.lo: match.S
  	mv _match.o match.lo
  	rm -f _match.s
@@ -137,10 +46,10 @@ Index: zlib-1.2.11/Makefile.in
  example.o: $(SRCDIR)test/example.c $(SRCDIR)zlib.h zconf.h
  	$(CC) $(CFLAGS) $(ZINCOUT) -c -o $@ $(SRCDIR)test/example.c
  
-Index: zlib-1.2.11/compress.c
+Index: zlib-1.2.12/compress.c
 ===================================================================
---- zlib-1.2.11.orig/compress.c
-+++ zlib-1.2.11/compress.c
+--- zlib-1.2.12.orig/compress.c
++++ zlib-1.2.12/compress.c
 @@ -5,9 +5,15 @@
  
  /* @(#) $Id$ */
@@ -171,11 +80,11 @@ Index: zlib-1.2.11/compress.c
      return sourceLen + (sourceLen >> 12) + (sourceLen >> 14) +
             (sourceLen >> 25) + 13;
  }
-Index: zlib-1.2.11/configure
+Index: zlib-1.2.12/configure
 ===================================================================
---- zlib-1.2.11.orig/configure
-+++ zlib-1.2.11/configure
-@@ -114,6 +114,7 @@ case "$1" in
+--- zlib-1.2.12.orig/configure
++++ zlib-1.2.12/configure
+@@ -115,6 +115,7 @@ case "$1" in
        echo '  configure [--const] [--zprefix] [--prefix=PREFIX]  [--eprefix=EXPREFIX]' | tee -a configure.log
        echo '    [--static] [--64] [--libdir=LIBDIR] [--sharedlibdir=LIBDIR]' | tee -a configure.log
        echo '    [--includedir=INCLUDEDIR] [--archs="-arch i386 -arch x86_64"]' | tee -a configure.log
@@ -183,10 +92,10 @@ Index: zlib-1.2.11/configure
          exit 0 ;;
      -p*=* | --prefix=*) prefix=`echo $1 | sed 's/.*=//'`; shift ;;
      -e*=* | --eprefix=*) exec_prefix=`echo $1 | sed 's/.*=//'`; shift ;;
-@@ -137,6 +138,16 @@ case "$1" in
-     -c* | --const) zconst=1; shift ;;
+@@ -139,6 +140,16 @@ case "$1" in
      -w* | --warn) warn=1; shift ;;
      -d* | --debug) debug=1; shift ;;
+     --sanitize) sanitize=1; shift ;;
 +    --dfltcc)
 +      CFLAGS="$CFLAGS -DDFLTCC"
 +      OBJC="$OBJC dfltcc.o"
@@ -200,7 +109,7 @@ Index: zlib-1.2.11/configure
      *)
        echo "unknown option: $1" | tee -a configure.log
        echo "$0 --help for help" | tee -a configure.log
-@@ -911,6 +922,19 @@ EOF
+@@ -833,6 +844,19 @@ EOF
    fi
  fi
  
@@ -220,11 +129,11 @@ Index: zlib-1.2.11/configure
  # show the results in the log
  echo >> configure.log
  echo ALL = $ALL >> configure.log
-Index: zlib-1.2.11/contrib/README.contrib
+Index: zlib-1.2.12/contrib/README.contrib
 ===================================================================
---- zlib-1.2.11.orig/contrib/README.contrib
-+++ zlib-1.2.11/contrib/README.contrib
-@@ -67,6 +67,10 @@ puff/       by Mark Adler <madler@alumni
+--- zlib-1.2.12.orig/contrib/README.contrib
++++ zlib-1.2.12/contrib/README.contrib
+@@ -46,6 +46,10 @@ puff/       by Mark Adler <madler@alumni
          Small, low memory usage inflate.  Also serves to provide an
          unambiguous description of the deflate format.
  
@@ -235,10 +144,10 @@ Index: zlib-1.2.11/contrib/README.contrib
  testzlib/   by Gilles Vollant <info@winimage.com>
          Example of the use of zlib
  
-Index: zlib-1.2.11/contrib/s390/README.txt
+Index: zlib-1.2.12/contrib/s390/README.txt
 ===================================================================
 --- /dev/null
-+++ zlib-1.2.11/contrib/s390/README.txt
++++ zlib-1.2.12/contrib/s390/README.txt
 @@ -0,0 +1,17 @@
 +IBM Z mainframes starting from version z15 provide DFLTCC instruction,
 +which implements deflate algorithm in hardware with estimated
@@ -257,10 +166,10 @@ Index: zlib-1.2.11/contrib/s390/README.txt
 +make it used by default) one could either configure with
 +--dfltcc-level-mask=0x7e or set the environment variable
 +DFLTCC_LEVEL_MASK to 0x7e at run time.
-Index: zlib-1.2.11/contrib/s390/dfltcc.c
+Index: zlib-1.2.12/contrib/s390/dfltcc.c
 ===================================================================
 --- /dev/null
-+++ zlib-1.2.11/contrib/s390/dfltcc.c
++++ zlib-1.2.12/contrib/s390/dfltcc.c
 @@ -0,0 +1,996 @@
 +/* dfltcc.c - SystemZ DEFLATE CONVERSION CALL support. */
 +
@@ -1258,10 +1167,10 @@ Index: zlib-1.2.11/contrib/s390/dfltcc.c
 +        *dict_length = param->hl;
 +    return Z_OK;
 +}
-Index: zlib-1.2.11/contrib/s390/dfltcc.h
+Index: zlib-1.2.12/contrib/s390/dfltcc.h
 ===================================================================
 --- /dev/null
-+++ zlib-1.2.11/contrib/s390/dfltcc.h
++++ zlib-1.2.12/contrib/s390/dfltcc.h
 @@ -0,0 +1,81 @@
 +#ifndef DFLTCC_H
 +#define DFLTCC_H
@@ -1344,10 +1253,10 @@ Index: zlib-1.2.11/contrib/s390/dfltcc.h
 +    } while (0)
 +
 +#endif
-Index: zlib-1.2.11/contrib/s390/dfltcc_deflate.h
+Index: zlib-1.2.12/contrib/s390/dfltcc_deflate.h
 ===================================================================
 --- /dev/null
-+++ zlib-1.2.11/contrib/s390/dfltcc_deflate.h
++++ zlib-1.2.12/contrib/s390/dfltcc_deflate.h
 @@ -0,0 +1,55 @@
 +#ifndef DFLTCC_DEFLATE_H
 +#define DFLTCC_DEFLATE_H
@@ -1404,10 +1313,10 @@ Index: zlib-1.2.11/contrib/s390/dfltcc_deflate.h
 +#define DEFLATE_NEED_CHECKSUM(strm) (!dfltcc_can_deflate((strm)))
 +
 +#endif
-Index: zlib-1.2.11/deflate.c
+Index: zlib-1.2.12/deflate.c
 ===================================================================
---- zlib-1.2.11.orig/deflate.c
-+++ zlib-1.2.11/deflate.c
+--- zlib-1.2.12.orig/deflate.c
++++ zlib-1.2.12/deflate.c
 @@ -61,15 +61,30 @@ const char deflate_copyright[] =
   */
  
@@ -1454,7 +1363,7 @@ Index: zlib-1.2.11/deflate.c
  local unsigned read_buf   OF((z_streamp strm, Bytef *buf, unsigned size));
  #ifdef ASMV
  #  pragma message("Assembler code may have bugs -- use at your own risk")
-@@ -291,7 +305,7 @@ int ZEXPORT deflateInit2_(strm, level, m
+@@ -294,7 +308,7 @@ int ZEXPORT deflateInit2_(strm, level, m
          return Z_STREAM_ERROR;
      }
      if (windowBits == 8) windowBits = 9;  /* until 256-byte window bug fixed */
@@ -1463,7 +1372,7 @@ Index: zlib-1.2.11/deflate.c
      if (s == Z_NULL) return Z_MEM_ERROR;
      strm->state = (struct internal_state FAR *)s;
      s->strm = strm;
-@@ -308,7 +322,7 @@ int ZEXPORT deflateInit2_(strm, level, m
+@@ -311,7 +325,7 @@ int ZEXPORT deflateInit2_(strm, level, m
      s->hash_mask = s->hash_size - 1;
      s->hash_shift =  ((s->hash_bits+MIN_MATCH-1)/MIN_MATCH);
  
@@ -1472,7 +1381,7 @@ Index: zlib-1.2.11/deflate.c
      s->prev   = (Posf *)  ZALLOC(strm, s->w_size, sizeof(Pos));
      s->head   = (Posf *)  ZALLOC(strm, s->hash_size, sizeof(Pos));
  
-@@ -426,6 +440,7 @@ int ZEXPORT deflateSetDictionary (strm,
+@@ -429,6 +443,7 @@ int ZEXPORT deflateSetDictionary (strm,
      /* when using zlib wrappers, compute Adler-32 for provided dictionary */
      if (wrap == 1)
          strm->adler = adler32(strm->adler, dictionary, dictLength);
@@ -1480,7 +1389,7 @@ Index: zlib-1.2.11/deflate.c
      s->wrap = 0;                    /* avoid computing Adler-32 in read_buf */
  
      /* if dictionary would fill window, just replace the history */
-@@ -484,6 +499,7 @@ int ZEXPORT deflateGetDictionary (strm,
+@@ -487,6 +502,7 @@ int ZEXPORT deflateGetDictionary (strm,
  
      if (deflateStateCheck(strm))
          return Z_STREAM_ERROR;
@@ -1488,7 +1397,7 @@ Index: zlib-1.2.11/deflate.c
      s = strm->state;
      len = s->strstart + s->lookahead;
      if (len > s->w_size)
-@@ -530,6 +546,8 @@ int ZEXPORT deflateResetKeep (strm)
+@@ -533,6 +549,8 @@ int ZEXPORT deflateResetKeep (strm)
  
      _tr_init(s);
  
@@ -1497,7 +1406,7 @@ Index: zlib-1.2.11/deflate.c
      return Z_OK;
  }
  
-@@ -604,6 +622,7 @@ int ZEXPORT deflateParams(strm, level, s
+@@ -608,6 +626,7 @@ int ZEXPORT deflateParams(strm, level, s
  {
      deflate_state *s;
      compress_func func;
@@ -1505,7 +1414,7 @@ Index: zlib-1.2.11/deflate.c
  
      if (deflateStateCheck(strm)) return Z_STREAM_ERROR;
      s = strm->state;
-@@ -616,15 +635,18 @@ int ZEXPORT deflateParams(strm, level, s
+@@ -620,15 +639,18 @@ int ZEXPORT deflateParams(strm, level, s
      if (level < 0 || level > 9 || strategy < 0 || strategy > Z_FIXED) {
          return Z_STREAM_ERROR;
      }
@@ -1528,7 +1437,7 @@ Index: zlib-1.2.11/deflate.c
              return Z_BUF_ERROR;
      }
      if (s->level != level) {
-@@ -691,6 +713,7 @@ uLong ZEXPORT deflateBound(strm, sourceL
+@@ -695,6 +717,7 @@ uLong ZEXPORT deflateBound(strm, sourceL
      /* conservative upper bound for compressed data */
      complen = sourceLen +
                ((sourceLen + 7) >> 3) + ((sourceLen + 63) >> 6) + 5;
@@ -1536,7 +1445,7 @@ Index: zlib-1.2.11/deflate.c
  
      /* if can't get parameters, return conservative bound plus zlib wrapper */
      if (deflateStateCheck(strm))
-@@ -732,7 +755,8 @@ uLong ZEXPORT deflateBound(strm, sourceL
+@@ -736,7 +759,8 @@ uLong ZEXPORT deflateBound(strm, sourceL
      }
  
      /* if not default parameters, return conservative bound */
@@ -1546,7 +1455,7 @@ Index: zlib-1.2.11/deflate.c
          return complen + wraplen;
  
      /* default settings: return tight bound for that case */
-@@ -759,7 +783,7 @@ local void putShortMSB (s, b)
+@@ -763,7 +787,7 @@ local void putShortMSB (s, b)
   * applications may wish to modify it to avoid allocating a large
   * strm->next_out buffer and copying into it. (See also read_buf()).
   */
@@ -1555,7 +1464,7 @@ Index: zlib-1.2.11/deflate.c
      z_streamp strm;
  {
      unsigned len;
-@@ -1029,7 +1053,8 @@ int ZEXPORT deflate (strm, flush)
+@@ -1035,7 +1059,8 @@ int ZEXPORT deflate (strm, flush)
          (flush != Z_NO_FLUSH && s->status != FINISH_STATE)) {
          block_state bstate;
  
@@ -1565,7 +1474,37 @@ Index: zlib-1.2.11/deflate.c
                   s->strategy == Z_HUFFMAN_ONLY ? deflate_huff(s, flush) :
                   s->strategy == Z_RLE ? deflate_rle(s, flush) :
                   (*(configuration_table[s->level].func))(s, flush);
-@@ -1118,9 +1143,9 @@ int ZEXPORT deflateEnd (strm)
+@@ -1082,7 +1107,6 @@ int ZEXPORT deflate (strm, flush)
+     }
+ 
+     if (flush != Z_FINISH) return Z_OK;
+-    if (s->wrap <= 0) return Z_STREAM_END;
+ 
+     /* Write the trailer */
+ #ifdef GZIP
+@@ -1098,7 +1122,7 @@ int ZEXPORT deflate (strm, flush)
+     }
+     else
+ #endif
+-    {
++    if (s->wrap == 1) {
+         putShortMSB(s, (uInt)(strm->adler >> 16));
+         putShortMSB(s, (uInt)(strm->adler & 0xffff));
+     }
+@@ -1107,7 +1131,11 @@ int ZEXPORT deflate (strm, flush)
+      * to flush the rest.
+      */
+     if (s->wrap > 0) s->wrap = -s->wrap; /* write the trailer only once! */
+-    return s->pending != 0 ? Z_OK : Z_STREAM_END;
++    if (s->pending == 0) {
++        Assert(s->bi_valid == 0, "bi_buf not flushed");
++        return Z_STREAM_END;
++    }
++    return Z_OK;
+ }
+ 
+ /* ========================================================================= */
+@@ -1124,9 +1152,9 @@ int ZEXPORT deflateEnd (strm)
      TRY_FREE(strm, strm->state->pending_buf);
      TRY_FREE(strm, strm->state->head);
      TRY_FREE(strm, strm->state->prev);
@@ -1577,7 +1516,7 @@ Index: zlib-1.2.11/deflate.c
      strm->state = Z_NULL;
  
      return status == BUSY_STATE ? Z_DATA_ERROR : Z_OK;
-@@ -1150,13 +1175,13 @@ int ZEXPORT deflateCopy (dest, source)
+@@ -1156,13 +1184,13 @@ int ZEXPORT deflateCopy (dest, source)
  
      zmemcpy((voidpf)dest, (voidpf)source, sizeof(z_stream));
  
@@ -1594,7 +1533,7 @@ Index: zlib-1.2.11/deflate.c
      ds->prev   = (Posf *)  ZALLOC(dest, ds->w_size, sizeof(Pos));
      ds->head   = (Posf *)  ZALLOC(dest, ds->hash_size, sizeof(Pos));
      ds->pending_buf = (uchf *) ZALLOC(dest, ds->lit_bufsize, 4);
-@@ -1203,7 +1228,8 @@ local unsigned read_buf(strm, buf, size)
+@@ -1209,7 +1237,8 @@ local unsigned read_buf(strm, buf, size)
      strm->avail_in  -= len;
  
      zmemcpy(buf, strm->next_in, len);
@@ -1604,10 +1543,10 @@ Index: zlib-1.2.11/deflate.c
          strm->adler = adler32(strm->adler, buf, len);
      }
  #ifdef GZIP
-Index: zlib-1.2.11/deflate.h
+Index: zlib-1.2.12/deflate.h
 ===================================================================
---- zlib-1.2.11.orig/deflate.h
-+++ zlib-1.2.11/deflate.h
+--- zlib-1.2.12.orig/deflate.h
++++ zlib-1.2.12/deflate.h
 @@ -299,6 +299,7 @@ void ZLIB_INTERNAL _tr_flush_bits OF((de
  void ZLIB_INTERNAL _tr_align OF((deflate_state *s));
  void ZLIB_INTERNAL _tr_stored_block OF((deflate_state *s, charf *buf,
@@ -1632,10 +1571,10 @@ Index: zlib-1.2.11/deflate.h
 +void ZLIB_INTERNAL flush_pending OF((z_streamp strm));
 +
  #endif /* DEFLATE_H */
-Index: zlib-1.2.11/gzguts.h
+Index: zlib-1.2.12/gzguts.h
 ===================================================================
---- zlib-1.2.11.orig/gzguts.h
-+++ zlib-1.2.11/gzguts.h
+--- zlib-1.2.12.orig/gzguts.h
++++ zlib-1.2.12/gzguts.h
 @@ -153,7 +153,11 @@
  
  /* default i/o buffer size -- double this for output when reading (this and
@@ -1648,10 +1587,10 @@ Index: zlib-1.2.11/gzguts.h
  
  /* gzip modes, also provide a little integrity check on the passed structure */
  #define GZ_NONE 0
-Index: zlib-1.2.11/inflate.c
+Index: zlib-1.2.12/inflate.c
 ===================================================================
---- zlib-1.2.11.orig/inflate.c
-+++ zlib-1.2.11/inflate.c
+--- zlib-1.2.12.orig/inflate.c
++++ zlib-1.2.12/inflate.c
 @@ -85,6 +85,24 @@
  #include "inflate.h"
  #include "inffast.h"
@@ -1677,7 +1616,7 @@ Index: zlib-1.2.11/inflate.c
  #ifdef MAKEFIXED
  #  ifndef BUILDFIXED
  #    define BUILDFIXED
-@@ -137,6 +155,7 @@ z_streamp strm;
+@@ -138,6 +156,7 @@ z_streamp strm;
      state->lencode = state->distcode = state->next = state->codes;
      state->sane = 1;
      state->back = -1;
@@ -1685,7 +1624,7 @@ Index: zlib-1.2.11/inflate.c
      Tracev((stderr, "inflate: reset\n"));
      return Z_OK;
  }
-@@ -182,7 +201,7 @@ int windowBits;
+@@ -183,7 +202,7 @@ int windowBits;
      if (windowBits && (windowBits < 8 || windowBits > 15))
          return Z_STREAM_ERROR;
      if (state->window != Z_NULL && state->wbits != (unsigned)windowBits) {
@@ -1694,7 +1633,7 @@ Index: zlib-1.2.11/inflate.c
          state->window = Z_NULL;
      }
  
-@@ -218,7 +237,7 @@ int stream_size;
+@@ -219,7 +238,7 @@ int stream_size;
          strm->zfree = zcfree;
  #endif
      state = (struct inflate_state FAR *)
@@ -1703,7 +1642,7 @@ Index: zlib-1.2.11/inflate.c
      if (state == Z_NULL) return Z_MEM_ERROR;
      Tracev((stderr, "inflate: allocated\n"));
      strm->state = (struct internal_state FAR *)state;
-@@ -227,7 +246,7 @@ int stream_size;
+@@ -228,7 +247,7 @@ int stream_size;
      state->mode = HEAD;     /* to pass state test in inflateReset2() */
      ret = inflateReset2(strm, windowBits);
      if (ret != Z_OK) {
@@ -1712,7 +1651,7 @@ Index: zlib-1.2.11/inflate.c
          strm->state = Z_NULL;
      }
      return ret;
-@@ -249,6 +268,7 @@ int value;
+@@ -250,6 +269,7 @@ int value;
      struct inflate_state FAR *state;
  
      if (inflateStateCheck(strm)) return Z_STREAM_ERROR;
@@ -1720,7 +1659,7 @@ Index: zlib-1.2.11/inflate.c
      state = (struct inflate_state FAR *)strm->state;
      if (bits < 0) {
          state->hold = 0;
-@@ -376,6 +396,27 @@ void makefixed()
+@@ -377,6 +397,27 @@ void makefixed()
  }
  #endif /* MAKEFIXED */
  
@@ -1748,7 +1687,7 @@ Index: zlib-1.2.11/inflate.c
  /*
     Update the window with the last wsize (normally 32K) bytes written before
     returning.  If window does not exist yet, create it.  This is only called
-@@ -400,20 +441,7 @@ unsigned copy;
+@@ -401,20 +442,7 @@ unsigned copy;
  
      state = (struct inflate_state FAR *)strm->state;
  
@@ -1770,24 +1709,24 @@ Index: zlib-1.2.11/inflate.c
  
      /* copy state->wsize or less output bytes into the circular window */
      if (copy >= state->wsize) {
-@@ -846,6 +874,7 @@ int flush;
-         case TYPE:
+@@ -857,6 +885,7 @@ int flush;
              if (flush == Z_BLOCK || flush == Z_TREES) goto inf_leave;
+                 /* fallthrough */
          case TYPEDO:
 +            INFLATE_TYPEDO_HOOK(strm, flush);
              if (state->last) {
                  BYTEBITS();
                  state->mode = CHECK;
-@@ -1197,7 +1226,7 @@ int flush;
+@@ -1218,7 +1247,7 @@ int flush;
                  out -= left;
                  strm->total_out += out;
                  state->total += out;
 -                if ((state->wrap & 4) && out)
 +                if (INFLATE_NEED_CHECKSUM(strm) && (state->wrap & 4) && out)
                      strm->adler = state->check =
-                         UPDATE(state->check, put - out, out);
+                         UPDATE_CHECK(state->check, put - out, out);
                  out = left;
-@@ -1249,8 +1278,9 @@ int flush;
+@@ -1273,8 +1302,9 @@ int flush;
       */
    inf_leave:
      RESTORE();
@@ -1799,16 +1738,16 @@ Index: zlib-1.2.11/inflate.c
          if (updatewindow(strm, strm->next_out, out - strm->avail_out)) {
              state->mode = MEM;
              return Z_MEM_ERROR;
-@@ -1260,7 +1290,7 @@ int flush;
+@@ -1284,7 +1314,7 @@ int flush;
      strm->total_in += in;
      strm->total_out += out;
      state->total += out;
 -    if ((state->wrap & 4) && out)
 +    if (INFLATE_NEED_CHECKSUM(strm) && (state->wrap & 4) && out)
          strm->adler = state->check =
-             UPDATE(state->check, strm->next_out - out, out);
+             UPDATE_CHECK(state->check, strm->next_out - out, out);
      strm->data_type = (int)state->bits + (state->last ? 64 : 0) +
-@@ -1278,8 +1308,8 @@ z_streamp strm;
+@@ -1302,8 +1332,8 @@ z_streamp strm;
      if (inflateStateCheck(strm))
          return Z_STREAM_ERROR;
      state = (struct inflate_state FAR *)strm->state;
@@ -1819,7 +1758,7 @@ Index: zlib-1.2.11/inflate.c
      strm->state = Z_NULL;
      Tracev((stderr, "inflate: end\n"));
      return Z_OK;
-@@ -1451,6 +1481,7 @@ z_streamp strm;
+@@ -1482,6 +1512,7 @@ z_streamp strm;
      struct inflate_state FAR *state;
  
      if (inflateStateCheck(strm)) return Z_STREAM_ERROR;
@@ -1827,7 +1766,7 @@ Index: zlib-1.2.11/inflate.c
      state = (struct inflate_state FAR *)strm->state;
      return state->mode == STORED && state->bits == 0;
  }
-@@ -1471,21 +1502,22 @@ z_streamp source;
+@@ -1502,21 +1533,22 @@ z_streamp source;
  
      /* allocate space */
      copy = (struct inflate_state FAR *)
@@ -1854,7 +1793,7 @@ Index: zlib-1.2.11/inflate.c
      copy->strm = dest;
      if (state->lencode >= state->codes &&
          state->lencode <= state->codes + ENOUGH - 1) {
-@@ -1542,6 +1574,7 @@ z_streamp strm;
+@@ -1573,6 +1605,7 @@ z_streamp strm;
  
      if (inflateStateCheck(strm))
          return -(1L << 16);
@@ -1862,20 +1801,20 @@ Index: zlib-1.2.11/inflate.c
      state = (struct inflate_state FAR *)strm->state;
      return (long)(((unsigned long)((long)state->back)) << 16) +
          (state->mode == COPY ? state->length :
-Index: zlib-1.2.11/inflate.h
+Index: zlib-1.2.12/inflate.h
 ===================================================================
---- zlib-1.2.11.orig/inflate.h
-+++ zlib-1.2.11/inflate.h
-@@ -123,3 +123,5 @@ struct inflate_state {
+--- zlib-1.2.12.orig/inflate.h
++++ zlib-1.2.12/inflate.h
+@@ -124,3 +124,5 @@ struct inflate_state {
      int back;                   /* bits back of last unprocessed length/lit */
      unsigned was;               /* initial length of match */
  };
 +
 +int ZLIB_INTERNAL inflate_ensure_window OF((struct inflate_state *state));
-Index: zlib-1.2.11/test/infcover.c
+Index: zlib-1.2.12/test/infcover.c
 ===================================================================
---- zlib-1.2.11.orig/test/infcover.c
-+++ zlib-1.2.11/test/infcover.c
+--- zlib-1.2.12.orig/test/infcover.c
++++ zlib-1.2.12/test/infcover.c
 @@ -373,7 +373,7 @@ local void cover_support(void)
      mem_setup(&strm);
      strm.avail_in = 0;
@@ -1894,10 +1833,10 @@ Index: zlib-1.2.11/test/infcover.c
  {
      static unsigned int next = 0;
      static unsigned char dat[] = {0x63, 0, 2, 0};
-Index: zlib-1.2.11/test/minigzip.c
+Index: zlib-1.2.12/test/minigzip.c
 ===================================================================
---- zlib-1.2.11.orig/test/minigzip.c
-+++ zlib-1.2.11/test/minigzip.c
+--- zlib-1.2.12.orig/test/minigzip.c
++++ zlib-1.2.12/test/minigzip.c
 @@ -132,7 +132,11 @@ static void pwinerror (s)
  #endif
  #define SUFFIX_LEN (sizeof(GZ_SUFFIX)-1)
@@ -1910,15 +1849,15 @@ Index: zlib-1.2.11/test/minigzip.c
  #define MAX_NAME_LEN 1024
  
  #ifdef MAXSEG_64K
-Index: zlib-1.2.11/trees.c
+Index: zlib-1.2.12/trees.c
 ===================================================================
---- zlib-1.2.11.orig/trees.c
-+++ zlib-1.2.11/trees.c
+--- zlib-1.2.12.orig/trees.c
++++ zlib-1.2.12/trees.c
 @@ -149,8 +149,6 @@ local void send_all_trees OF((deflate_st
  local void compress_block OF((deflate_state *s, const ct_data *ltree,
                                const ct_data *dtree));
  local int  detect_data_type OF((deflate_state *s));
--local unsigned bi_reverse OF((unsigned value, int length));
+-local unsigned bi_reverse OF((unsigned code, int len));
 -local void bi_windup      OF((deflate_state *s));
  local void bi_flush       OF((deflate_state *s));
  
@@ -1937,7 +1876,7 @@ Index: zlib-1.2.11/trees.c
  
  /* the arguments must not have side effects */
  
-@@ -1133,7 +1138,7 @@ local int detect_data_type(s)
+@@ -1134,7 +1139,7 @@ local int detect_data_type(s)
   * method would use a table)
   * IN assertion: 1 <= len <= 15
   */
@@ -1946,7 +1885,7 @@ Index: zlib-1.2.11/trees.c
      unsigned code; /* the value to invert */
      int len;       /* its bit length */
  {
-@@ -1165,7 +1170,7 @@ local void bi_flush(s)
+@@ -1166,7 +1171,7 @@ local void bi_flush(s)
  /* ===========================================================================
   * Flush the bit buffer and align the output on a byte boundary
   */
@@ -1955,11 +1894,11 @@ Index: zlib-1.2.11/trees.c
      deflate_state *s;
  {
      if (s->bi_valid > 8) {
-Index: zlib-1.2.11/zutil.h
+Index: zlib-1.2.12/zutil.h
 ===================================================================
---- zlib-1.2.11.orig/zutil.h
-+++ zlib-1.2.11/zutil.h
-@@ -80,6 +80,8 @@ extern z_const char * const z_errmsg[10]
+--- zlib-1.2.12.orig/zutil.h
++++ zlib-1.2.12/zutil.h
+@@ -87,6 +87,8 @@ extern z_const char * const z_errmsg[10]
  
  #define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */
  
diff --git a/zlib-1.2.12-correct-inputs-provided-to-crc-func.patch b/zlib-1.2.12-correct-inputs-provided-to-crc-func.patch
new file mode 100644
index 0000000..62cbeb4
--- /dev/null
+++ b/zlib-1.2.12-correct-inputs-provided-to-crc-func.patch
@@ -0,0 +1,51 @@
+From ec3df00224d4b396e2ac6586ab5d25f673caa4c2 Mon Sep 17 00:00:00 2001
+From: Mark Adler <madler@alumni.caltech.edu>
+Date: Wed, 30 Mar 2022 11:14:53 -0700
+Subject: [PATCH] Correct incorrect inputs provided to the CRC functions.
+
+The previous releases of zlib were not sensitive to incorrect CRC
+inputs with bits set above the low 32. This commit restores that
+behavior, so that applications with such bugs will continue to
+operate as before.
+---
+ crc32.c | 8 ++++----
+ 1 file changed, 4 insertions(+), 4 deletions(-)
+
+diff --git a/crc32.c b/crc32.c
+index a1bdce5c2..451887bc7 100644
+--- a/crc32.c
++++ b/crc32.c
+@@ -630,7 +630,7 @@ unsigned long ZEXPORT crc32_z(crc, buf, len)
+ #endif /* DYNAMIC_CRC_TABLE */
+ 
+     /* Pre-condition the CRC */
+-    crc ^= 0xffffffff;
++    crc = (~crc) & 0xffffffff;
+ 
+     /* Compute the CRC up to a word boundary. */
+     while (len && ((z_size_t)buf & 7) != 0) {
+@@ -749,7 +749,7 @@ unsigned long ZEXPORT crc32_z(crc, buf, len)
+ #endif /* DYNAMIC_CRC_TABLE */
+ 
+     /* Pre-condition the CRC */
+-    crc ^= 0xffffffff;
++    crc = (~crc) & 0xffffffff;
+ 
+ #ifdef W
+ 
+@@ -1077,7 +1077,7 @@ uLong ZEXPORT crc32_combine64(crc1, crc2, len2)
+ #ifdef DYNAMIC_CRC_TABLE
+     once(&made, make_crc_table);
+ #endif /* DYNAMIC_CRC_TABLE */
+-    return multmodp(x2nmodp(len2, 3), crc1) ^ crc2;
++    return multmodp(x2nmodp(len2, 3), crc1) ^ (crc2 & 0xffffffff);
+ }
+ 
+ /* ========================================================================= */
+@@ -1112,5 +1112,5 @@ uLong crc32_combine_op(crc1, crc2, op)
+     uLong crc2;
+     uLong op;
+ {
+-    return multmodp(op, crc1) ^ crc2;
++    return multmodp(op, crc1) ^ (crc2 & 0xffffffff);
+ }
diff --git a/zlib-1.2.12-fix-CVE-2022-37434.patch b/zlib-1.2.12-fix-CVE-2022-37434.patch
new file mode 100644
index 0000000..e5c1e87
--- /dev/null
+++ b/zlib-1.2.12-fix-CVE-2022-37434.patch
@@ -0,0 +1,14 @@
+--- zlib-1.2.12/inflate.c.old	2022-08-09 10:30:18.831225181 +0000
++++ zlib-1.2.12/inflate.c	2022-08-09 10:29:33.251225181 +0000
+@@ -792,8 +792,9 @@ int flush;
+                 if (copy > have) copy = have;
+                 if (copy) {
+                     if (state->head != Z_NULL &&
+-                        state->head->extra != Z_NULL) {
+-                        len = state->head->extra_len - state->length;
++                        state->head->extra != Z_NULL &&
++                        (len = state->head->extra_len - state->length) <
++				state->head->extra_max) {
+                         zmemcpy(state->head->extra + len, next,
+                                 len + copy > state->head->extra_max ?
+                                 state->head->extra_max - len : copy);
diff --git a/zlib-1.2.12-fix-configure.patch b/zlib-1.2.12-fix-configure.patch
new file mode 100644
index 0000000..a117b48
--- /dev/null
+++ b/zlib-1.2.12-fix-configure.patch
@@ -0,0 +1,24 @@
+From 6378872888c85c02f340126712684e0f603f5e76 Mon Sep 17 00:00:00 2001
+From: Ilya Leoshkevich <iii@linux.ibm.com>
+Date: Wed, 27 Apr 2022 14:38:23 +0200
+Subject: [PATCH] zlib-1.2.12-fix-configure.patch
+
+---
+ configure | 3 +++
+ 1 file changed, 3 insertions(+)
+
+diff --git a/configure b/configure
+index cff6207ec..dd01b5c0e 100755
+--- a/configure
++++ b/configure
+@@ -185,7 +185,10 @@ if test -z "$CC"; then
+   else
+     cc=${CROSS_PREFIX}cc
+   fi
++else
++  cc=${CC}
+ fi
++
+ cflags=${CFLAGS-"-O3"}
+ # to force the asm version use: CFLAGS="-O3 -DASMV" ./configure
+ case "$cc" in
diff --git a/zlib-power8-fate325307.patch b/zlib-1.2.12-optimized-crc32-power8.patch
similarity index 75%
rename from zlib-power8-fate325307.patch
rename to zlib-1.2.12-optimized-crc32-power8.patch
index a422789..5256e51 100644
--- a/zlib-power8-fate325307.patch
+++ b/zlib-1.2.12-optimized-crc32-power8.patch
@@ -1,26 +1,450 @@
-From 25cd259b18b2dc7192837594556644a300dbf5d1 Mon Sep 17 00:00:00 2001
-From: Daniel Black <daniel@linux.vnet.ibm.com>
-Date: Wed, 10 Jan 2018 10:50:39 +1100
-Subject: [PATCH 1/8] Add Power8+ optimized crc32-vpmsum from
- https://github.com/antonblanchard/crc32-vpmsum/
+From 8c6fc7cb5f408f1fb92eaf8cee8ce571c174b5e0 Mon Sep 17 00:00:00 2001
+From: Ilya Leoshkevich <iii@linux.ibm.com>
+Date: Wed, 27 Apr 2022 14:38:11 +0200
+Subject: [PATCH] zlib-1.2.12-optimized-crc32-power8.patch
 
-This is the C implementation created by Rogerio Alves <rogealve@br.ibm.com>
-Bruce R. - Tweaked patch to have type of crc32_vpmsum conform to usage
-(see bsc#1141059)
 ---
- power8-crc/clang_workaround.h |   69 +++
- power8-crc/crc32_constants.h  | 1206 +++++++++++++++++++++++++++++++++++++++++
- power8-crc/vec_crc32.c        |  672 +++++++++++++++++++++++
- 3 files changed, 1947 insertions(+)
- create mode 100644 power8-crc/clang_workaround.h
- create mode 100644 power8-crc/crc32_constants.h
- create mode 100644 power8-crc/vec_crc32.c
+ CMakeLists.txt                   |   72 ++
+ Makefile.in                      |   43 +-
+ configure                        |   69 ++
+ contrib/README.contrib           |    9 +
+ contrib/gcc/zifunc.h             |   60 ++
+ contrib/power/clang_workaround.h |   87 +++
+ contrib/power/crc32_constants.h  | 1206 ++++++++++++++++++++++++++++++
+ contrib/power/crc32_z_power8.c   |  679 +++++++++++++++++
+ contrib/power/crc32_z_resolver.c |   15 +
+ contrib/power/power.h            |    8 +
+ crc32.c                          |   12 +
+ test/crc32_test.c                |  205 +++++
+ 12 files changed, 2455 insertions(+), 10 deletions(-)
+ create mode 100644 contrib/gcc/zifunc.h
+ create mode 100644 contrib/power/clang_workaround.h
+ create mode 100644 contrib/power/crc32_constants.h
+ create mode 100644 contrib/power/crc32_z_power8.c
+ create mode 100644 contrib/power/crc32_z_resolver.c
+ create mode 100644 contrib/power/power.h
+ create mode 100644 test/crc32_test.c
 
-Index: zlib-1.2.11/contrib/power8-crc/clang_workaround.h
-===================================================================
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index e6fbb37d1..581e1fa6d 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -7,6 +7,7 @@ set(VERSION "1.2.12")
+ 
+ option(ASM686 "Enable building i686 assembly implementation")
+ option(AMD64 "Enable building amd64 assembly implementation")
++option(POWER "Enable building power implementation")
+ 
+ set(INSTALL_BIN_DIR "${CMAKE_INSTALL_PREFIX}/bin" CACHE PATH "Installation directory for executables")
+ set(INSTALL_LIB_DIR "${CMAKE_INSTALL_PREFIX}/lib" CACHE PATH "Installation directory for libraries")
+@@ -140,6 +141,73 @@ if(CMAKE_COMPILER_IS_GNUCC)
+ 		add_definitions(-DASMV)
+ 		set_source_files_properties(${ZLIB_ASMS} PROPERTIES LANGUAGE C COMPILE_FLAGS -DNO_UNDERLINE)
+ 	endif()
++
++    # test to see if we can use a GNU indirect function to detect and load optimized code at runtime
++    CHECK_C_SOURCE_COMPILES("
++    static int test_ifunc_native(void)
++    {
++       return 1;
++    }
++    static int (*(check_ifunc_native(void)))(void)
++    {
++       return test_ifunc_native;
++    }
++    int test_ifunc(void) __attribute__ ((ifunc (\"check_ifunc_native\")));
++    int main(void)
++    {
++       return 0;
++    }
++    " HAS_C_ATTR_IFUNC)
++
++    if(HAS_C_ATTR_IFUNC)
++        add_definitions(-DHAVE_IFUNC)
++        set(ZLIB_PRIVATE_HDRS ${ZLIB_PRIVATE_HDRS} contrib/gcc/zifunc.h)
++    endif()
++
++    if(POWER)
++        # Test to see if we can use the optimizations for Power
++        CHECK_C_SOURCE_COMPILES("
++        #ifndef _ARCH_PPC
++            #error \"Target is not Power\"
++        #endif
++        #ifndef __BUILTIN_CPU_SUPPORTS__
++            #error \"Target doesn't support __builtin_cpu_supports()\"
++        #endif
++        int main() { return 0; }
++        " HAS_POWER_SUPPORT)
++
++        if(HAS_POWER_SUPPORT AND HAS_C_ATTR_IFUNC)
++            add_definitions(-DZ_POWER_OPT)
++
++            set(CMAKE_REQUIRED_FLAGS -mcpu=power8)
++            CHECK_C_SOURCE_COMPILES("int main(void){return 0;}" POWER8)
++
++            if(POWER8)
++                add_definitions(-DZ_POWER8)
++                set(ZLIB_POWER8
++                  contrib/power/crc32_z_power8.c)
++
++                set_source_files_properties(
++                    ${ZLIB_POWER8}
++                    PROPERTIES COMPILE_FLAGS -mcpu=power8)
++            endif()
++
++            set(CMAKE_REQUIRED_FLAGS -mcpu=power9)
++            CHECK_C_SOURCE_COMPILES("int main(void){return 0;}" POWER9)
++
++            if(POWER9)
++                add_definitions(-DZ_POWER9)
++                set(ZLIB_POWER9 )
++
++                set_source_files_properties(
++                    ${ZLIB_POWER9}
++                    PROPERTIES COMPILE_FLAGS -mcpu=power9)
++            endif()
++
++            set(ZLIB_PRIVATE_HDRS ${ZLIB_PRIVATE_HDRS} contrib/power/power.h)
++            set(ZLIB_SRCS ${ZLIB_SRCS} ${ZLIB_POWER8} ${ZLIB_POWER9})
++        endif()
++    endif()
+ endif()
+ 
+ if(MSVC)
+@@ -234,6 +302,10 @@ add_executable(example test/example.c)
+ target_link_libraries(example zlib)
+ add_test(example example)
+ 
++add_executable(crc32_test test/crc32_test.c)
++target_link_libraries(crc32_test zlib)
++add_test(crc32_test crc32_test)
++
+ add_executable(minigzip test/minigzip.c)
+ target_link_libraries(minigzip zlib)
+ 
+diff --git a/Makefile.in b/Makefile.in
+index 6c1d28223..2e78f3844 100644
+--- a/Makefile.in
++++ b/Makefile.in
+@@ -75,11 +75,11 @@ PIC_OBJS = $(PIC_OBJC) $(PIC_OBJA)
+ 
+ all: static shared
+ 
+-static: example$(EXE) minigzip$(EXE)
++static: crc32_test$(EXE) example$(EXE) minigzip$(EXE)
+ 
+-shared: examplesh$(EXE) minigzipsh$(EXE)
++shared: crc32_testsh$(EXE) examplesh$(EXE) minigzipsh$(EXE)
+ 
+-all64: example64$(EXE) minigzip64$(EXE)
++all64: crc32_test64$(EXE) example64$(EXE) minigzip64$(EXE)
+ 
+ check: test
+ 
+@@ -87,7 +87,7 @@ test: all teststatic testshared
+ 
+ teststatic: static
+ 	@TMPST=tmpst_$$; \
+-	if echo hello world | ./minigzip | ./minigzip -d && ./example $$TMPST ; then \
++	if echo hello world | ./minigzip | ./minigzip -d && ./example $$TMPST && ./crc32_test; then \
+ 	  echo '		*** zlib test OK ***'; \
+ 	else \
+ 	  echo '		*** zlib test FAILED ***'; false; \
+@@ -100,7 +100,7 @@ testshared: shared
+ 	DYLD_LIBRARY_PATH=`pwd`:$(DYLD_LIBRARY_PATH) ; export DYLD_LIBRARY_PATH; \
+ 	SHLIB_PATH=`pwd`:$(SHLIB_PATH) ; export SHLIB_PATH; \
+ 	TMPSH=tmpsh_$$; \
+-	if echo hello world | ./minigzipsh | ./minigzipsh -d && ./examplesh $$TMPSH; then \
++	if echo hello world | ./minigzipsh | ./minigzipsh -d && ./examplesh $$TMPSH && ./crc32_testsh; then \
+ 	  echo '		*** zlib shared test OK ***'; \
+ 	else \
+ 	  echo '		*** zlib shared test FAILED ***'; false; \
+@@ -109,7 +109,7 @@ testshared: shared
+ 
+ test64: all64
+ 	@TMP64=tmp64_$$; \
+-	if echo hello world | ./minigzip64 | ./minigzip64 -d && ./example64 $$TMP64; then \
++	if echo hello world | ./minigzip64 | ./minigzip64 -d && ./example64 $$TMP64 && ./crc32_test64; then \
+ 	  echo '		*** zlib 64-bit test OK ***'; \
+ 	else \
+ 	  echo '		*** zlib 64-bit test FAILED ***'; false; \
+@@ -151,12 +151,18 @@ dfltcc.lo: $(SRCDIR)contrib/s390/dfltcc.c $(SRCDIR)zlib.h zconf.h
+ 	$(CC) $(SFLAGS) $(ZINC) -DPIC -c -o objs/dfltcc.o $(SRCDIR)contrib/s390/dfltcc.c
+ 	-@mv objs/dfltcc.o $@
+ 
++crc32_test.o: $(SRCDIR)test/crc32_test.c $(SRCDIR)zlib.h zconf.h
++	$(CC) $(CFLAGS) $(ZINCOUT) -c -o $@ $(SRCDIR)test/crc32_test.c
++
+ example.o: $(SRCDIR)test/example.c $(SRCDIR)zlib.h zconf.h
+ 	$(CC) $(CFLAGS) $(ZINCOUT) -c -o $@ $(SRCDIR)test/example.c
+ 
+ minigzip.o: $(SRCDIR)test/minigzip.c $(SRCDIR)zlib.h zconf.h
+ 	$(CC) $(CFLAGS) $(ZINCOUT) -c -o $@ $(SRCDIR)test/minigzip.c
+ 
++crc32_test64.o: $(SRCDIR)test/crc32_test.c $(SRCDIR)zlib.h zconf.h
++	$(CC) $(CFLAGS) $(ZINCOUT) -D_FILE_OFFSET_BITS=64 -c -o $@ $(SRCDIR)test/crc32_test.c
++
+ example64.o: $(SRCDIR)test/example.c $(SRCDIR)zlib.h zconf.h
+ 	$(CC) $(CFLAGS) $(ZINCOUT) -D_FILE_OFFSET_BITS=64 -c -o $@ $(SRCDIR)test/example.c
+ 
+@@ -170,6 +176,9 @@ adler32.o: $(SRCDIR)adler32.c
+ crc32.o: $(SRCDIR)crc32.c
+ 	$(CC) $(CFLAGS) $(ZINC) -c -o $@ $(SRCDIR)crc32.c
+ 
++crc32_z_power8.o: $(SRCDIR)contrib/power/crc32_z_power8.c
++	$(CC) $(CFLAGS) -mcpu=power8 $(ZINC) -c -o $@ $(SRCDIR)contrib/power/crc32_z_power8.c
++
+ deflate.o: $(SRCDIR)deflate.c
+ 	$(CC) $(CFLAGS) $(ZINC) -c -o $@ $(SRCDIR)deflate.c
+ 
+@@ -220,6 +229,11 @@ crc32.lo: $(SRCDIR)crc32.c
+ 	$(CC) $(SFLAGS) $(ZINC) -DPIC -c -o objs/crc32.o $(SRCDIR)crc32.c
+ 	-@mv objs/crc32.o $@
+ 
++crc32_z_power8.lo: $(SRCDIR)contrib/power/crc32_z_power8.c
++	-@mkdir objs 2>/dev/null || test -d objs
++	$(CC) $(SFLAGS) -mcpu=power8 $(ZINC) -DPIC -c -o objs/crc32_z_power8.o $(SRCDIR)contrib/power/crc32_z_power8.c
++	-@mv objs/crc32_z_power8.o $@
++
+ deflate.lo: $(SRCDIR)deflate.c
+ 	-@mkdir objs 2>/dev/null || test -d objs
+ 	$(CC) $(SFLAGS) $(ZINC) -DPIC -c -o objs/deflate.o $(SRCDIR)deflate.c
+@@ -293,18 +307,27 @@ placebo $(SHAREDLIBV): $(PIC_OBJS) libz.a
+ 	ln -s $@ $(SHAREDLIBM)
+ 	-@rmdir objs
+ 
++crc32_test$(EXE): crc32_test.o $(STATICLIB)
++	$(CC) $(CFLAGS) -o $@ crc32_test.o $(TEST_LDFLAGS)
++
+ example$(EXE): example.o $(STATICLIB)
+ 	$(CC) $(CFLAGS) -o $@ example.o $(TEST_LDFLAGS)
+ 
+ minigzip$(EXE): minigzip.o $(STATICLIB)
+ 	$(CC) $(CFLAGS) -o $@ minigzip.o $(TEST_LDFLAGS)
+ 
++crc32_testsh$(EXE): crc32_test.o $(SHAREDLIBV)
++	$(CC) $(CFLAGS) -o $@ crc32_test.o -L. $(SHAREDLIBV)
++
+ examplesh$(EXE): example.o $(SHAREDLIBV)
+ 	$(CC) $(CFLAGS) -o $@ example.o -L. $(SHAREDLIBV)
+ 
+ minigzipsh$(EXE): minigzip.o $(SHAREDLIBV)
+ 	$(CC) $(CFLAGS) -o $@ minigzip.o -L. $(SHAREDLIBV)
+ 
++crc32_test64$(EXE): crc32_test64.o $(STATICLIB)
++	$(CC) $(CFLAGS) -o $@ crc32_test64.o $(TEST_LDFLAGS)
++
+ example64$(EXE): example64.o $(STATICLIB)
+ 	$(CC) $(CFLAGS) -o $@ example64.o $(TEST_LDFLAGS)
+ 
+@@ -374,8 +397,8 @@ zconf: $(SRCDIR)zconf.h.in
+ mostlyclean: clean
+ clean:
+ 	rm -f *.o *.lo *~ \
+-	   example$(EXE) minigzip$(EXE) examplesh$(EXE) minigzipsh$(EXE) \
+-	   example64$(EXE) minigzip64$(EXE) \
++	   crc32_test$(EXE) example$(EXE) minigzip$(EXE) crc32_testsh$(EXE) examplesh$(EXE) minigzipsh$(EXE) \
++	   crc32_test64$(EXE) example64$(EXE) minigzip64$(EXE) \
+ 	   infcover \
+ 	   libz.* foo.gz so_locations \
+ 	   _match.s maketree contrib/infback9/*.o
+@@ -397,7 +420,7 @@ tags:
+ 
+ adler32.o zutil.o: $(SRCDIR)zutil.h $(SRCDIR)zlib.h zconf.h
+ gzclose.o gzlib.o gzread.o gzwrite.o: $(SRCDIR)zlib.h zconf.h $(SRCDIR)gzguts.h
+-compress.o example.o minigzip.o uncompr.o: $(SRCDIR)zlib.h zconf.h
++compress.o crc32_test.o example.o minigzip.o uncompr.o: $(SRCDIR)zlib.h zconf.h
+ crc32.o: $(SRCDIR)zutil.h $(SRCDIR)zlib.h zconf.h $(SRCDIR)crc32.h
+ deflate.o: $(SRCDIR)deflate.h $(SRCDIR)zutil.h $(SRCDIR)zlib.h zconf.h
+ infback.o inflate.o: $(SRCDIR)zutil.h $(SRCDIR)zlib.h zconf.h $(SRCDIR)inftrees.h $(SRCDIR)inflate.h $(SRCDIR)inffast.h $(SRCDIR)inffixed.h
+@@ -407,7 +430,7 @@ trees.o: $(SRCDIR)deflate.h $(SRCDIR)zutil.h $(SRCDIR)zlib.h zconf.h $(SRCDIR)tr
+ 
+ adler32.lo zutil.lo: $(SRCDIR)zutil.h $(SRCDIR)zlib.h zconf.h
+ gzclose.lo gzlib.lo gzread.lo gzwrite.lo: $(SRCDIR)zlib.h zconf.h $(SRCDIR)gzguts.h
+-compress.lo example.lo minigzip.lo uncompr.lo: $(SRCDIR)zlib.h zconf.h
++compress.lo crc32_test.lo example.lo minigzip.lo uncompr.lo: $(SRCDIR)zlib.h zconf.h
+ crc32.lo: $(SRCDIR)zutil.h $(SRCDIR)zlib.h zconf.h $(SRCDIR)crc32.h
+ deflate.lo: $(SRCDIR)deflate.h $(SRCDIR)zutil.h $(SRCDIR)zlib.h zconf.h
+ infback.lo inflate.lo: $(SRCDIR)zutil.h $(SRCDIR)zlib.h zconf.h $(SRCDIR)inftrees.h $(SRCDIR)inflate.h $(SRCDIR)inffast.h $(SRCDIR)inffixed.h
+diff --git a/configure b/configure
+index a21be36af..cff6207ec 100755
+--- a/configure
++++ b/configure
+@@ -857,6 +857,75 @@ else
+     echo "Checking for sys/sdt.h ... No." | tee -a configure.log
+ fi
+ 
++# test to see if we can use a gnu indirection function to detect and load optimized code at runtime
++echo >> configure.log
++cat > $test.c <<EOF
++static int test_ifunc_native(void)
++{
++  return 1;
++}
++
++static int (*(check_ifunc_native(void)))(void)
++{
++  return test_ifunc_native;
++}
++
++int test_ifunc(void) __attribute__ ((ifunc ("check_ifunc_native")));
++EOF
++
++if tryboth $CC -c $CFLAGS $test.c; then
++  SFLAGS="${SFLAGS} -DHAVE_IFUNC"
++  CFLAGS="${CFLAGS} -DHAVE_IFUNC"
++  echo "Checking for attribute(ifunc) support... Yes." | tee -a configure.log
++else
++  echo "Checking for attribute(ifunc) support... No." | tee -a configure.log
++fi
++
++# Test to see if we can use the optimizations for Power
++echo >> configure.log
++cat > $test.c <<EOF
++#ifndef _ARCH_PPC
++  #error "Target is not Power"
++#endif
++#if !(defined(__PPC64__) || defined(__powerpc64__))
++  #error "Target is not 64 bits"
++#endif
++#ifndef HAVE_IFUNC
++  #error "Target doesn't support ifunc"
++#endif
++#ifndef __BUILTIN_CPU_SUPPORTS__
++  #error "Target doesn't support __builtin_cpu_supports()"
++#endif
++EOF
++
++if tryboth $CC -c $CFLAGS $test.c; then
++  echo "int main(void){return 0;}" > $test.c
++
++  if tryboth $CC -c $CFLAGS -mcpu=power8 $test.c; then
++    POWER8="-DZ_POWER8"
++    PIC_OBJC="${PIC_OBJC} crc32_z_power8.lo"
++    OBJC="${OBJC} crc32_z_power8.o"
++    echo "Checking for -mcpu=power8 support... Yes." | tee -a configure.log
++  else
++    echo "Checking for -mcpu=power8 support... No." | tee -a configure.log
++  fi
++
++  if tryboth $CC -c $CFLAGS -mcpu=power9 $test.c; then
++    POWER9="-DZ_POWER9"
++    PIC_OBJC="${PIC_OBJC}"
++    OBJC="${OBJC}"
++    echo "Checking for -mcpu=power9 support... Yes." | tee -a configure.log
++  else
++    echo "Checking for -mcpu=power9 support... No." | tee -a configure.log
++  fi
++
++  SFLAGS="${SFLAGS} ${POWER8} ${POWER9} -DZ_POWER_OPT"
++  CFLAGS="${CFLAGS} ${POWER8} ${POWER9} -DZ_POWER_OPT"
++  echo "Checking for Power optimizations support... Yes." | tee -a configure.log
++else
++  echo "Checking for Power optimizations support... No." | tee -a configure.log
++fi
++
+ # show the results in the log
+ echo >> configure.log
+ echo ALL = $ALL >> configure.log
+diff --git a/contrib/README.contrib b/contrib/README.contrib
+index 130a28bdb..1199184b7 100644
+--- a/contrib/README.contrib
++++ b/contrib/README.contrib
+@@ -11,6 +11,10 @@ ada/        by Dmitriy Anisimkov <anisimkov@yahoo.com>
+ blast/      by Mark Adler <madler@alumni.caltech.edu>
+         Decompressor for output of PKWare Data Compression Library (DCL)
+ 
++gcc/        by Matheus Castanho <msc@linux.ibm.com>
++            and Rogerio Alves <rcardoso@linux.ibm.com>
++        Optimization helpers using GCC-specific extensions
++
+ delphi/     by Cosmin Truta <cosmint@cs.ubbcluj.ro>
+         Support for Delphi and C++ Builder
+ 
+@@ -42,6 +46,11 @@ minizip/    by Gilles Vollant <info@winimage.com>
+ pascal/     by Bob Dellaca <bobdl@xtra.co.nz> et al.
+         Support for Pascal
+ 
++power/      by Daniel Black <daniel@linux.ibm.com>
++               Matheus Castanho <msc@linux.ibm.com>
++            and Rogerio Alves <rcardoso@linux.ibm.com>
++        Optimized functions for Power processors
++
+ puff/       by Mark Adler <madler@alumni.caltech.edu>
+         Small, low memory usage inflate.  Also serves to provide an
+         unambiguous description of the deflate format.
+diff --git a/contrib/gcc/zifunc.h b/contrib/gcc/zifunc.h
+new file mode 100644
+index 000000000..daf4fe442
 --- /dev/null
-+++ zlib-1.2.11/contrib/power8-crc/clang_workaround.h
-@@ -0,0 +1,82 @@
++++ b/contrib/gcc/zifunc.h
+@@ -0,0 +1,60 @@
++/* Copyright (C) 2019 Matheus Castanho <msc@linux.ibm.com>, IBM
++ *               2019 Rogerio Alves    <rogerio.alves@ibm.com>, IBM
++ * For conditions of distribution and use, see copyright notice in zlib.h
++ */
++
++#ifndef Z_IFUNC_H_
++#define Z_IFUNC_H_
++
++/* Helpers for arch optimizations */
++
++#define Z_IFUNC(fname) \
++    typeof(fname) fname __attribute__ ((ifunc (#fname "_resolver"))); \
++    local typeof(fname) *fname##_resolver(void)
++/* This is a helper macro to declare a resolver for an indirect function
++ * (ifunc). Let's say you have function
++ *
++ *    int foo (int a);
++ *
++ * for which you want to provide different implementations, for example:
++ *
++ *    int foo_clever (int a) {
++ *      ... clever things ...
++ *    }
++ *
++ *    int foo_smart (int a) {
++ *      ... smart things ...
++ *    }
++ *
++ * You will have to declare foo() as an indirect function and also provide a
++ * resolver for it, to choose between foo_clever() and foo_smart() based on
++ * some criteria you define (e.g. processor features).
++ *
++ * Since most likely foo() has a default implementation somewhere in zlib, you
++ * may have to rename it so the 'foo' symbol can be used by the ifunc without
++ * conflicts.
++ *
++ *    #define foo foo_default
++ *    int foo (int a) {
++ *      ...
++ *    }
++ *    #undef foo
++ *
++ * Now you just have to provide a resolver function to choose which function
++ * should be used (decided at runtime on the first call to foo()):
++ *
++ *    Z_IFUNC(foo) {
++ *        if (... some condition ...)
++ *          return foo_clever;
++ *
++ *        if (... other condition ...)
++ *          return foo_smart;
++ *
++ *        return foo_default;
++ *    }
++ *
++ * All calls to foo() throughout the code can remain untouched, all the magic
++ * will be done by the linker using the resolver function.
++ */
++
++#endif /* Z_IFUNC_H_ */
+diff --git a/contrib/power/clang_workaround.h b/contrib/power/clang_workaround.h
+new file mode 100644
+index 000000000..915f7e528
+--- /dev/null
++++ b/contrib/power/clang_workaround.h
+@@ -0,0 +1,87 @@
 +#ifndef CLANG_WORKAROUNDS_H
 +#define CLANG_WORKAROUNDS_H
 +
@@ -62,7 +486,12 @@ Index: zlib-1.2.11/contrib/power8-crc/clang_workaround.h
 +	return __v;
 +}
 +
-+#ifndef vec_xxpermdi
++/*
++ * Clang 7 changed the behavior of vec_xxpermdi in order to provide the same
++ * behavior of GCC. That means code adapted to Clang >= 7 does not work on
++ * Clang <= 6.  So, fallback to __builtin_unpack_vector() on Clang <= 6.
++ */
++#if !defined vec_xxpermdi || __clang_major__ <= 6
 +
 +static inline
 +unsigned long __builtin_unpack_vector (__vector unsigned long long __v,
@@ -85,9 +514,9 @@ Index: zlib-1.2.11/contrib/power8-crc/clang_workaround.h
 +unsigned long __builtin_unpack_vector_0 (__vector unsigned long long __v)
 +{
 +	#if defined(__BIG_ENDIAN__)
-+	return vec_xxpermdi(__v, __v, 0x0)[1];
-+	#else
 +	return vec_xxpermdi(__v, __v, 0x0)[0];
++	#else
++	return vec_xxpermdi(__v, __v, 0x3)[0];
 +	#endif
 +}
 +
@@ -95,18 +524,19 @@ Index: zlib-1.2.11/contrib/power8-crc/clang_workaround.h
 +unsigned long __builtin_unpack_vector_1 (__vector unsigned long long __v)
 +{
 +	#if defined(__BIG_ENDIAN__)
-+	return vec_xxpermdi(__v, __v, 0x3)[1];
-+	#else
 +	return vec_xxpermdi(__v, __v, 0x3)[0];
++	#else
++	return vec_xxpermdi(__v, __v, 0x0)[0];
 +	#endif
 +}
 +#endif /* vec_xxpermdi */
 +
 +#endif
-Index: zlib-1.2.11/contrib/power8-crc/crc32_constants.h
-===================================================================
+diff --git a/contrib/power/crc32_constants.h b/contrib/power/crc32_constants.h
+new file mode 100644
+index 000000000..58088dcc0
 --- /dev/null
-+++ zlib-1.2.11/contrib/power8-crc/crc32_constants.h
++++ b/contrib/power/crc32_constants.h
 @@ -0,0 +1,1206 @@
 +/*
 +*
@@ -1314,10 +1744,11 @@ Index: zlib-1.2.11/contrib/power8-crc/crc32_constants.h
 +#endif /* POWER8_INTRINSICS */
 +
 +#endif /* __ASSEMBLER__ */
-Index: zlib-1.2.11/contrib/power8-crc/vec_crc32.c
-===================================================================
+diff --git a/contrib/power/crc32_z_power8.c b/contrib/power/crc32_z_power8.c
+new file mode 100644
+index 000000000..7858cfe0e
 --- /dev/null
-+++ zlib-1.2.11/contrib/power8-crc/vec_crc32.c
++++ b/contrib/power/crc32_z_power8.c
 @@ -0,0 +1,679 @@
 +/*
 + * Calculate the checksum of data that is 16 byte aligned and a multiple of
@@ -1351,6 +1782,8 @@ Index: zlib-1.2.11/contrib/power8-crc/vec_crc32.c
 + */
 +
 +#include <altivec.h>
++#include "../../zutil.h"
++#include "power.h"
 +
 +#define POWER8_INTRINSICS
 +#define CRC_TABLE
@@ -1361,8 +1794,6 @@ Index: zlib-1.2.11/contrib/power8-crc/vec_crc32.c
 +#include "crc32_constants.h"
 +#endif
 +
-+#include <stdlib.h>
-+
 +#define VMX_ALIGN	16
 +#define VMX_ALIGN_MASK	(VMX_ALIGN-1)
 +
@@ -1387,19 +1818,18 @@ Index: zlib-1.2.11/contrib/power8-crc/vec_crc32.c
 +static unsigned int __attribute__ ((aligned (32)))
 +__crc32_vpmsum(unsigned int crc, const void* p, unsigned long len);
 +
-+#ifndef CRC32_FUNCTION
-+#define CRC32_FUNCTION  crc32_vpmsum
-+#endif
-+
-+unsigned long CRC32_FUNCTION(unsigned long crc_l, const unsigned char *p,
-+			    unsigned long len)
++unsigned long ZLIB_INTERNAL _crc32_z_power8(uLong _crc, const Bytef *_p,
++			    z_size_t _len)
 +{
-+	unsigned int prealign, crc = (unsigned int)crc_l;
++	unsigned int prealign;
 +	unsigned int tail;
 +
-+	/* For zlib API */
-+	if (p == NULL) return 0UL;
++	/* Map zlib API to crc32_vpmsum API */
++	unsigned int crc = (unsigned int) (0xffffffff & _crc);
++	const unsigned char *p = _p;
++	unsigned long len = (unsigned long) _len;
 +
++	if (p == (const unsigned char *) 0x0) return 0;
 +#ifdef CRC_XOR
 +	crc ^= 0xffffffff;
 +#endif
@@ -1429,7 +1859,8 @@ Index: zlib-1.2.11/contrib/power8-crc/vec_crc32.c
 +	crc ^= 0xffffffff;
 +#endif
 +
-+	return (unsigned long)crc;
++	/* Convert to zlib API */
++	return (unsigned long) crc;
 +}
 +
 +#if defined (__clang__)
@@ -1998,268 +2429,279 @@ Index: zlib-1.2.11/contrib/power8-crc/vec_crc32.c
 +
 +	return result;
 +}
-Index: zlib-1.2.11/Makefile.in
-===================================================================
---- zlib-1.2.11.orig/Makefile.in
-+++ zlib-1.2.11/Makefile.in
-@@ -162,6 +162,9 @@ adler32.o: $(SRCDIR)adler32.c
- crc32.o: $(SRCDIR)crc32.c
- 	$(CC) $(CFLAGS) $(ZINC) -c -o $@ $(SRCDIR)crc32.c
- 
-+crc32_power8.o: $(SRCDIR)contrib/power8-crc/vec_crc32.c
-+	$(CC) $(CFLAGS) $(ZINC) -c -o $@ $(SRCDIR)contrib/power8-crc/vec_crc32.c
+diff --git a/contrib/power/crc32_z_resolver.c b/contrib/power/crc32_z_resolver.c
+new file mode 100644
+index 000000000..f4e9aa491
+--- /dev/null
++++ b/contrib/power/crc32_z_resolver.c
+@@ -0,0 +1,15 @@
++/* Copyright (C) 2019 Matheus Castanho <msc@linux.ibm.com>, IBM
++ * For conditions of distribution and use, see copyright notice in zlib.h
++ */
 +
- deflate.o: $(SRCDIR)deflate.c
- 	$(CC) $(CFLAGS) $(ZINC) -c -o $@ $(SRCDIR)deflate.c
- 
-@@ -212,6 +215,11 @@ crc32.lo: $(SRCDIR)crc32.c
- 	$(CC) $(SFLAGS) $(ZINC) -DPIC -c -o objs/crc32.o $(SRCDIR)crc32.c
- 	-@mv objs/crc32.o $@
- 
-+crc32_power8.lo: $(SRCDIR)contrib/power8-crc/vec_crc32.c
-+	-@mkdir objs 2>/dev/null || test -d objs
-+	$(CC) $(SFLAGS) $(ZINC) -DPIC -c -o objs/crc32_power8.o $(SRCDIR)contrib/power8-crc/vec_crc32.c
-+	-@mv objs/crc32_power8.o $@
++#include "../gcc/zifunc.h"
++#include "power.h"
 +
- deflate.lo: $(SRCDIR)deflate.c
- 	-@mkdir objs 2>/dev/null || test -d objs
- 	$(CC) $(SFLAGS) $(ZINC) -DPIC -c -o objs/deflate.o $(SRCDIR)deflate.c
-Index: zlib-1.2.11/configure
-===================================================================
---- zlib-1.2.11.orig/configure
-+++ zlib-1.2.11/configure
-@@ -826,6 +826,91 @@ EOF
-   fi
- fi
- 
-+# test to see if Power8+ implementation is compile time possible
-+echo >> configure.log
-+cat > $test.c <<EOF
-+#if _ARCH_PWR8==1
-+
-+#if __BYTE_ORDER == __BIG_ENDIAN && defined(__clang__)
-+#error "Clang vector instructions aren't big endian compatible"
++Z_IFUNC(crc32_z) {
++#ifdef Z_POWER8
++    if (__builtin_cpu_supports("arch_2_07"))
++        return _crc32_z_power8;
 +#endif
 +
-+#if defined(__BUILTIN_CPU_SUPPORTS__)
-+/* good and easy */
-+#else
-+#include <sys/auxv.h>
-+#include <bits/hwcap.h>
-+int main()
-+{
-+  return (getauxval(AT_HWCAP2) & PPC_FEATURE2_ARCH_2_07);
++    return crc32_z_default;
 +}
-+#endif
+diff --git a/contrib/power/power.h b/contrib/power/power.h
+new file mode 100644
+index 000000000..79123aa90
+--- /dev/null
++++ b/contrib/power/power.h
+@@ -0,0 +1,8 @@
++/* Copyright (C) 2019 Matheus Castanho <msc@linux.ibm.com>, IBM
++ *               2019 Rogerio Alves    <rogerio.alves@ibm.com>, IBM
++ * For conditions of distribution and use, see copyright notice in zlib.h
++ */
 +
-+#else
-+#error No Power 8 or newer architecture, may need -mcpu=power8
-+#endif
-+EOF
++#include "../../zconf.h"
 +
-+if tryboth $CC -c $CFLAGS $test.c; then
-+  OBJC="$OBJC crc32_power8.o"
-+  PIC_OBJC="$PIC_OBJC crc32_power8.lo"
-+  echo "Checking for runtime cpu detection and Power 8 (or newer) Architecture support... Yes." | tee -a configure.log
-+else
-+  echo "Checking for runtime cpu detection and Power 8 (or newer) Architecture support... No." | tee -a configure.log
-+fi
-+
-+# test to see if we can use a gnu indirection function to detect and load optimized code at runtime
-+echo >> configure.log
-+cat > $test.c <<EOF
-+static unsigned int crc32_real_optimized(unsigned int crc, unsigned char *p,
-+                          unsigned long len)
-+{
-+        return 1;
-+}
-+
-+static unsigned int (*(crc32_ifunc(void)))(unsigned int, unsigned char *,unsigned long)
-+{
-+  return crc32_real_optimized;
-+}
-+
-+unsigned int crc32(unsigned int, unsigned char *,unsigned long)
-+                    __attribute__ ((ifunc ("crc32_ifunc")));
-+EOF
-+
-+if tryboth $CC -c $CFLAGS $test.c; then
-+  SFLAGS="${SFLAGS} -DZ_IFUNC_NATIVE"
-+  echo "Checking for attribute(ifunc) support... Yes." | tee -a configure.log
-+else
-+  echo "Checking for attribute(ifunc) support... No." | tee -a configure.log
-+
-+  # alternately can we can use a gnu indirection using __asm__ attributes to detect and load optimized code at runtime
-+  echo >> configure.log
-+  cat > $test.c <<EOF
-+static unsigned int crc32_real_optimized(unsigned int crc, unsigned char *p,
-+                          unsigned long len)
-+{
-+        return 1;
-+}
-+
-+static unsigned int (*(crc32_ifunc(void)))(unsigned int, unsigned char *,unsigned long)
-+       __asm__ ("crc32");
-+
-+static unsigned int (*(crc32_ifunc(void)))(unsigned int, unsigned char *,unsigned long)
-+{
-+  return crc32_real_optimized;
-+}
-+
-+__asm__(".type crc32, %gnu_indirect_function");
-+EOF
-+
-+  if tryboth $CC -c $CFLAGS $test.c; then
-+    SFLAGS="${SFLAGS} -DZ_IFUNC_ASM"
-+    echo "Checking for asm .type %gnu_indirect_function support... Yes." | tee -a configure.log
-+  else
-+    echo "Checking for asm .type %gnu_indirect_function support... No." | tee -a configure.log
-+  fi
-+fi
-+
- # show the results in the log
- echo >> configure.log
- echo ALL = $ALL >> configure.log
-Index: zlib-1.2.11/crc32.c
-===================================================================
---- zlib-1.2.11.orig/crc32.c
-+++ zlib-1.2.11/crc32.c
-@@ -199,13 +199,78 @@ const z_crc_t FAR * ZEXPORT get_crc_tabl
- #define DO8 DO1; DO1; DO1; DO1; DO1; DO1; DO1; DO1
++unsigned long _crc32_z_power8(unsigned long, const Bytef *, z_size_t);
+diff --git a/crc32.c b/crc32.c
+index a1bdce5c2..ae7b7e792 100644
+--- a/crc32.c
++++ b/crc32.c
+@@ -736,6 +736,13 @@ local z_word_t crc_word_big(data)
+ #endif
  
  /* ========================================================================= */
--unsigned long ZEXPORT crc32_z(crc, buf, len)
-+local
-+unsigned long ZEXPORT crc32_table_lookup(crc, buf, len)
++#ifdef Z_POWER_OPT
++/* Rename function so resolver can use its symbol. The default version will be
++ * returned by the resolver if the host has no support for an optimized version.
++ */
++#define crc32_z crc32_z_default
++#endif /* Z_POWER_OPT */
++
+ unsigned long ZEXPORT crc32_z(crc, buf, len)
      unsigned long crc;
      const unsigned char FAR *buf;
-     z_size_t len;
- {
-     if (buf == Z_NULL) return 0UL;
- 
-+    crc = crc ^ 0xffffffffUL;
-+    while (len >= 8) {
-+        DO8;
-+        len -= 8;
-+    }
-+    if (len) do {
-+        DO1;
-+    } while (--len);
-+    return crc ^ 0xffffffffUL;
-+}
-+
-+/* Small helper function to compare optfun against the reference table lookup
-+ * return test_ref_comparision_##optfn in crc32_z_ifunc
-+#include <assert.h>
-+#define TEST_COMPARE(optfn) \
-+   static unsigned long test_ref_comparision_ ## optfn(unsigned long crc, const unsigned char FAR *p, z_size_t len) \
-+   { \
-+     unsigned long crc_tbl_lookup = crc32_table_lookup(crc, p, len); \
-+     unsigned long optcrc = optfn(crc, p, len); \
-+     assert( optcrc == crc_tbl_lookup ); \
-+     return optcrc; \
-+   }
-+*/
-+
-+#ifdef Z_IFUNC_ASM
-+unsigned long (*(crc32_z_ifunc(void)))(unsigned long, const unsigned char FAR *, z_size_t)
-+    __asm__ ("crc32_z");
-+__asm__(".type crc32_z, %gnu_indirect_function");
-+#elif defined(Z_IFUNC_NATIVE)
-+unsigned long ZEXPORT crc32_z(
-+    unsigned long crc,
-+    const unsigned char FAR *buf,
-+    z_size_t len)
-+  __attribute__ ((ifunc ("crc32_z_ifunc")));
-+#endif
-+
-+#if _ARCH_PWR8==1
-+unsigned long crc32_vpmsum(unsigned long, const unsigned char FAR *, z_size_t);
-+/* for testing TEST_COMPARE(crc32_vpmsum) */
-+#ifndef __BUILTIN_CPU_SUPPORTS__
-+#include <sys/auxv.h>
-+#include <bits/hwcap.h>
-+#endif
-+#endif
-+
-+/* due to a quirk of gnu_indirect_function - "local" (aka static) is applied to
-+ * crc32_z which is not desired. crc32_z_ifunc is implictly "local" */
-+#ifndef Z_IFUNC_ASM
-+local
-+#endif
-+unsigned long (*(crc32_z_ifunc(void)))(unsigned long, const unsigned char FAR *, z_size_t)
-+{
-+#if _ARCH_PWR8==1
-+#if defined(__BUILTIN_CPU_SUPPORTS__)
-+    if (__builtin_cpu_supports("arch_2_07"))
-+        return crc32_vpmsum;
-+#else
-+    if (getauxval(AT_HWCAP2) & PPC_FEATURE2_ARCH_2_07)
-+        return crc32_vpmsum;
-+#endif
-+#endif /* _ARCH_PWR8 */
-+
-+/* return a function pointer for optimized arches here */
-+
- #ifdef DYNAMIC_CRC_TABLE
-     if (crc_table_empty)
-         make_crc_table();
-@@ -217,22 +282,31 @@ unsigned long ZEXPORT crc32_z(crc, buf,
- 
-         endian = 1;
-         if (*((unsigned char *)(&endian)))
--            return crc32_little(crc, buf, len);
-+            return crc32_little;
-         else
--            return crc32_big(crc, buf, len);
-+            return crc32_big;
-     }
- #endif /* BYFOUR */
--    crc = crc ^ 0xffffffffUL;
--    while (len >= 8) {
--        DO8;
--        len -= 8;
--    }
--    if (len) do {
--        DO1;
--    } while (--len);
--    return crc ^ 0xffffffffUL;
-+
-+    return crc32_table_lookup;
-+}
-+
-+#if !defined(Z_IFUNC_ASM) && !defined(Z_IFUNC_NATIVE)
-+
-+unsigned long ZEXPORT crc32_z(crc, buf, len)
-+    unsigned long crc;
-+    const unsigned char FAR *buf;
-+    z_size_t len;
-+{
-+    static unsigned long ZEXPORT (*crc32_func)(unsigned long, const unsigned char FAR *, z_size_t) = NULL;
-+
-+    if (!crc32_func)
-+        crc32_func = crc32_z_ifunc();
-+    return (*crc32_func)(crc, buf, len);
+@@ -1057,6 +1064,11 @@ unsigned long ZEXPORT crc32_z(crc, buf, len)
+     return crc ^ 0xffffffff;
  }
  
-+#endif /* defined(Z_IFUNC_ASM) || defined(Z_IFUNC_NATIVE) */
++#ifdef Z_POWER_OPT
++#undef crc32_z
++#include "contrib/power/crc32_z_resolver.c"
++#endif /* Z_POWER_OPT */
 +
+ #endif
+ 
  /* ========================================================================= */
- unsigned long ZEXPORT crc32(crc, buf, len)
-     unsigned long crc;
-@@ -271,6 +345,7 @@ local unsigned long crc32_little(crc, bu
-     register z_crc_t c;
-     register const z_crc_t FAR *buf4;
- 
-+    if (buf == Z_NULL) return 0UL;
-     c = (z_crc_t)crc;
-     c = ~c;
-     while (len && ((ptrdiff_t)buf & 3)) {
-@@ -311,6 +386,7 @@ local unsigned long crc32_big(crc, buf,
-     register z_crc_t c;
-     register const z_crc_t FAR *buf4;
- 
-+    if (buf == Z_NULL) return 0UL;
-     c = ZSWAP32((z_crc_t)crc);
-     c = ~c;
-     while (len && ((ptrdiff_t)buf & 3)) {
+diff --git a/test/crc32_test.c b/test/crc32_test.c
+new file mode 100644
+index 000000000..3155553e6
+--- /dev/null
++++ b/test/crc32_test.c
+@@ -0,0 +1,205 @@
++/* crc32_tes.c -- unit test for crc32 in the zlib compression library
++ * Copyright (C) 1995-2006, 2010, 2011, 2016, 2019 Rogerio Alves
++ * For conditions of distribution and use, see copyright notice in zlib.h
++ */
++
++#include "zlib.h"
++#include <stdio.h>
++
++#ifdef STDC
++#  include <string.h>
++#  include <stdlib.h>
++#endif
++
++void test_crc32  OF((uLong crc, Byte* buf, z_size_t len, uLong chk, int line));
++int main         OF((void));
++
++typedef struct {
++    int line;
++    uLong crc;
++    char* buf;
++    int len;
++    uLong expect;
++} crc32_test;
++
++void test_crc32(crc, buf, len, chk, line)
++    uLong crc;
++    Byte *buf;
++    z_size_t len;
++    uLong chk;
++    int line;
++{
++    uLong res = crc32(crc, buf, len);
++    if (res != chk) {
++        fprintf(stderr, "FAIL [%d]: crc32 returned 0x%08X expected 0x%08X\n",
++                line, (unsigned int)res, (unsigned int)chk);
++        exit(1);
++    }
++}
++
++static const crc32_test tests[] = {
++  {__LINE__, 0x0, 0x0, 0, 0x0},
++  {__LINE__, 0xffffffff, 0x0, 0, 0x0},
++  {__LINE__, 0x0, 0x0, 255, 0x0}, /*  BZ 174799.  */
++  {__LINE__, 0x0, 0x0, 256, 0x0},
++  {__LINE__, 0x0, 0x0, 257, 0x0},
++  {__LINE__, 0x0, 0x0, 32767, 0x0},
++  {__LINE__, 0x0, 0x0, 32768, 0x0},
++  {__LINE__, 0x0, 0x0, 32769, 0x0},
++  {__LINE__, 0x0, "", 0, 0x0},
++  {__LINE__, 0xffffffff, "", 0, 0xffffffff},
++  {__LINE__, 0x0, "abacus", 6, 0xc3d7115b},
++  {__LINE__, 0x0, "backlog", 7, 0x269205},
++  {__LINE__, 0x0, "campfire", 8, 0x22a515f8},
++  {__LINE__, 0x0, "delta", 5, 0x9643fed9},
++  {__LINE__, 0x0, "executable", 10, 0xd68eda01},
++  {__LINE__, 0x0, "file", 4, 0x8c9f3610},
++  {__LINE__, 0x0, "greatest", 8, 0xc1abd6cd},
++  {__LINE__, 0x0, "hello", 5, 0x3610a686},
++  {__LINE__, 0x0, "inverter", 8, 0xc9e962c9},
++  {__LINE__, 0x0, "jigsaw", 6, 0xce4e3f69},
++  {__LINE__, 0x0, "karate", 6, 0x890be0e2},
++  {__LINE__, 0x0, "landscape", 9, 0xc4e0330b},
++  {__LINE__, 0x0, "machine", 7, 0x1505df84},
++  {__LINE__, 0x0, "nanometer", 9, 0xd4e19f39},
++  {__LINE__, 0x0, "oblivion", 8, 0xdae9de77},
++  {__LINE__, 0x0, "panama", 6, 0x66b8979c},
++  {__LINE__, 0x0, "quest", 5, 0x4317f817},
++  {__LINE__, 0x0, "resource", 8, 0xbc91f416},
++  {__LINE__, 0x0, "secret", 6, 0x5ca2e8e5},
++  {__LINE__, 0x0, "test", 4, 0xd87f7e0c},
++  {__LINE__, 0x0, "ultimate", 8, 0x3fc79b0b},
++  {__LINE__, 0x0, "vector", 6, 0x1b6e485b},
++  {__LINE__, 0x0, "walrus", 6, 0xbe769b97},
++  {__LINE__, 0x0, "xeno", 4, 0xe7a06444},
++  {__LINE__, 0x0, "yelling", 7, 0xfe3944e5},
++  {__LINE__, 0x0, "zlib", 4, 0x73887d3a},
++  {__LINE__, 0x0, "4BJD7PocN1VqX0jXVpWB", 20, 0xd487a5a1},
++  {__LINE__, 0x0, "F1rPWI7XvDs6nAIRx41l", 20, 0x61a0132e},
++  {__LINE__, 0x0, "ldhKlsVkPFOveXgkGtC2", 20, 0xdf02f76},
++  {__LINE__, 0x0, "5KKnGOOrs8BvJ35iKTOS", 20, 0x579b2b0a},
++  {__LINE__, 0x0, "0l1tw7GOcem06Ddu7yn4", 20, 0xf7d16e2d},
++  {__LINE__, 0x0, "MCr47CjPIn9R1IvE1Tm5", 20, 0x731788f5},
++  {__LINE__, 0x0, "UcixbzPKTIv0SvILHVdO", 20, 0x7112bb11},
++  {__LINE__, 0x0, "dGnAyAhRQDsWw0ESou24", 20, 0xf32a0dac},
++  {__LINE__, 0x0, "di0nvmY9UYMYDh0r45XT", 20, 0x625437bb},
++  {__LINE__, 0x0, "2XKDwHfAhFsV0RhbqtvH", 20, 0x896930f9},
++  {__LINE__, 0x0, "ZhrANFIiIvRnqClIVyeD", 20, 0x8579a37},
++  {__LINE__, 0x0, "v7Q9ehzioTOVeDIZioT1", 20, 0x632aa8e0},
++  {__LINE__, 0x0, "Yod5hEeKcYqyhfXbhxj2", 20, 0xc829af29},
++  {__LINE__, 0x0, "GehSWY2ay4uUKhehXYb0", 20, 0x1b08b7e8},
++  {__LINE__, 0x0, "kwytJmq6UqpflV8Y8GoE", 20, 0x4e33b192},
++  {__LINE__, 0x0, "70684206568419061514", 20, 0x59a179f0},
++  {__LINE__, 0x0, "42015093765128581010", 20, 0xcd1013d7},
++  {__LINE__, 0x0, "88214814356148806939", 20, 0xab927546},
++  {__LINE__, 0x0, "43472694284527343838", 20, 0x11f3b20c},
++  {__LINE__, 0x0, "49769333513942933689", 20, 0xd562d4ca},
++  {__LINE__, 0x0, "54979784887993251199", 20, 0x233395f7},
++  {__LINE__, 0x0, "58360544869206793220", 20, 0x2d167fd5},
++  {__LINE__, 0x0, "27347953487840714234", 20, 0x8b5108ba},
++  {__LINE__, 0x0, "07650690295365319082", 20, 0xc46b3cd8},
++  {__LINE__, 0x0, "42655507906821911703", 20, 0xc10b2662},
++  {__LINE__, 0x0, "29977409200786225655", 20, 0xc9a0f9d2},
++  {__LINE__, 0x0, "85181542907229116674", 20, 0x9341357b},
++  {__LINE__, 0x0, "87963594337989416799", 20, 0xf0424937},
++  {__LINE__, 0x0, "21395988329504168551", 20, 0xd7c4c31f},
++  {__LINE__, 0x0, "51991013580943379423", 20, 0xf11edcc4},
++  {__LINE__, 0x0, "*]+@!);({_$;}[_},?{?;(_?,=-][@", 30, 0x40795df4},
++  {__LINE__, 0x0, "_@:_).&(#.[:[{[:)$++-($_;@[)}+", 30, 0xdd61a631},
++  {__LINE__, 0x0, "&[!,[$_==}+.]@!;*(+},[;:)$;)-@", 30, 0xca907a99},
++  {__LINE__, 0x0, "]{.[.+?+[[=;[?}_#&;[=)__$$:+=_", 30, 0xf652deac},
++  {__LINE__, 0x0, "-%.)=/[@].:.(:,()$;=%@-$?]{%+%", 30, 0xaf39a5a9},
++  {__LINE__, 0x0, "+]#$(@&.=:,*];/.!]%/{:){:@(;)$", 30, 0x6bebb4cf},
++  {__LINE__, 0x0, ")-._.:?[&:.=+}(*$/=!.${;(=$@!}", 30, 0x76430bac},
++  {__LINE__, 0x0, ":(_*&%/[[}+,?#$&*+#[([*-/#;%(]", 30, 0x6c80c388},
++  {__LINE__, 0x0, "{[#-;:$/{)(+[}#]/{&!%(@)%:@-$:", 30, 0xd54d977d},
++  {__LINE__, 0x0, "_{$*,}(&,@.)):=!/%(&(,,-?$}}}!", 30, 0xe3966ad5},
++  {__LINE__, 0x0, "e$98KNzqaV)Y:2X?]77].{gKRD4G5{mHZk,Z)SpU%L3FSgv!Wb8MLAFdi{+fp)c,@8m6v)yXg@]HBDFk?.4&}g5_udE*JHCiH=aL", 100, 0xe7c71db9},
++  {__LINE__, 0x0, "r*Fd}ef+5RJQ;+W=4jTR9)R*p!B;]Ed7tkrLi;88U7g@3v!5pk2X6D)vt,.@N8c]@yyEcKi[vwUu@.Ppm@C6%Mv*3Nw}Y,58_aH)", 100, 0xeaa52777},
++  {__LINE__, 0x0, "h{bcmdC+a;t+Cf{6Y_dFq-{X4Yu&7uNfVDh?q&_u.UWJU],-GiH7ADzb7-V.Q%4=+v!$L9W+T=bP]$_:]Vyg}A.ygD.r;h-D]m%&", 100, 0xcd472048},
++  {__LINE__, 0x7a30360d, "abacus", 6, 0xf8655a84},
++  {__LINE__, 0x6fd767ee, "backlog", 7, 0x1ed834b1},
++  {__LINE__, 0xefeb7589, "campfire", 8, 0x686cfca},
++  {__LINE__, 0x61cf7e6b, "delta", 5, 0x1554e4b1},
++  {__LINE__, 0xdc712e2, "executable", 10, 0x761b4254},
++  {__LINE__, 0xad23c7fd, "file", 4, 0x7abdd09b},
++  {__LINE__, 0x85cb2317, "greatest", 8, 0x4ba91c6b},
++  {__LINE__, 0x9eed31b0, "inverter", 8, 0xd5e78ba5},
++  {__LINE__, 0xb94f34ca, "jigsaw", 6, 0x23649109},
++  {__LINE__, 0xab058a2, "karate", 6, 0xc5591f41},
++  {__LINE__, 0x5bff2b7a, "landscape", 9, 0xf10eb644},
++  {__LINE__, 0x605c9a5f, "machine", 7, 0xbaa0a636},
++  {__LINE__, 0x51bdeea5, "nanometer", 9, 0x6af89afb},
++  {__LINE__, 0x85c21c79, "oblivion", 8, 0xecae222b},
++  {__LINE__, 0x97216f56, "panama", 6, 0x47dffac4},
++  {__LINE__, 0x18444af2, "quest", 5, 0x70c2fe36},
++  {__LINE__, 0xbe6ce359, "resource", 8, 0x1471d925},
++  {__LINE__, 0x843071f1, "secret", 6, 0x50c9a0db},
++  {__LINE__, 0xf2480c60, "ultimate", 8, 0xf973daf8},
++  {__LINE__, 0x2d2feb3d, "vector", 6, 0x344ac03d},
++  {__LINE__, 0x7490310a, "walrus", 6, 0x6d1408ef},
++  {__LINE__, 0x97d247d4, "xeno", 4, 0xe62670b5},
++  {__LINE__, 0x93cf7599, "yelling", 7, 0x1b36da38},
++  {__LINE__, 0x73c84278, "zlib", 4, 0x6432d127},
++  {__LINE__, 0x228a87d1, "4BJD7PocN1VqX0jXVpWB", 20, 0x997107d0},
++  {__LINE__, 0xa7a048d0, "F1rPWI7XvDs6nAIRx41l", 20, 0xdc567274},
++  {__LINE__, 0x1f0ded40, "ldhKlsVkPFOveXgkGtC2", 20, 0xdcc63870},
++  {__LINE__, 0xa804a62f, "5KKnGOOrs8BvJ35iKTOS", 20, 0x6926cffd},
++  {__LINE__, 0x508fae6a, "0l1tw7GOcem06Ddu7yn4", 20, 0xb52b38bc},
++  {__LINE__, 0xe5adaf4f, "MCr47CjPIn9R1IvE1Tm5", 20, 0xf83b8178},
++  {__LINE__, 0x67136a40, "UcixbzPKTIv0SvILHVdO", 20, 0xc5213070},
++  {__LINE__, 0xb00c4a10, "dGnAyAhRQDsWw0ESou24", 20, 0xbc7648b0},
++  {__LINE__, 0x2e0c84b5, "di0nvmY9UYMYDh0r45XT", 20, 0xd8123a72},
++  {__LINE__, 0x81238d44, "2XKDwHfAhFsV0RhbqtvH", 20, 0xd5ac5620},
++  {__LINE__, 0xf853aa92, "ZhrANFIiIvRnqClIVyeD", 20, 0xceae099d},
++  {__LINE__, 0x5a692325, "v7Q9ehzioTOVeDIZioT1", 20, 0xb07d2b24},
++  {__LINE__, 0x3275b9f, "Yod5hEeKcYqyhfXbhxj2", 20, 0x24ce91df},
++  {__LINE__, 0x38371feb, "GehSWY2ay4uUKhehXYb0", 20, 0x707b3b30},
++  {__LINE__, 0xafc8bf62, "kwytJmq6UqpflV8Y8GoE", 20, 0x16abc6a9},
++  {__LINE__, 0x9b07db73, "70684206568419061514", 20, 0xae1fb7b7},
++  {__LINE__, 0xe75b214, "42015093765128581010", 20, 0xd4eecd2d},
++  {__LINE__, 0x72d0fe6f, "88214814356148806939", 20, 0x4660ec7},
++  {__LINE__, 0xf857a4b1, "43472694284527343838", 20, 0xfd8afdf7},
++  {__LINE__, 0x54b8e14, "49769333513942933689", 20, 0xc6d1b5f2},
++  {__LINE__, 0xd6aa5616, "54979784887993251199", 20, 0x32476461},
++  {__LINE__, 0x11e63098, "58360544869206793220", 20, 0xd917cf1a},
++  {__LINE__, 0xbe92385, "27347953487840714234", 20, 0x4ad14a12},
++  {__LINE__, 0x49511de0, "07650690295365319082", 20, 0xe37b5c6c},
++  {__LINE__, 0x3db13bc1, "42655507906821911703", 20, 0x7cc497f1},
++  {__LINE__, 0xbb899bea, "29977409200786225655", 20, 0x99781bb2},
++  {__LINE__, 0xf6cd9436, "85181542907229116674", 20, 0x132256a1},
++  {__LINE__, 0x9109e6c3, "87963594337989416799", 20, 0xbfdb2c83},
++  {__LINE__, 0x75770fc, "21395988329504168551", 20, 0x8d9d1e81},
++  {__LINE__, 0x69b1d19b, "51991013580943379423", 20, 0x7b6d4404},
++  {__LINE__, 0xc6132975, "*]+@!);({_$;}[_},?{?;(_?,=-][@", 30, 0x8619f010},
++  {__LINE__, 0xd58cb00c, "_@:_).&(#.[:[{[:)$++-($_;@[)}+", 30, 0x15746ac3},
++  {__LINE__, 0xb63b8caa, "&[!,[$_==}+.]@!;*(+},[;:)$;)-@", 30, 0xaccf812f},
++  {__LINE__, 0x8a45a2b8, "]{.[.+?+[[=;[?}_#&;[=)__$$:+=_", 30, 0x78af45de},
++  {__LINE__, 0xcbe95b78, "-%.)=/[@].:.(:,()$;=%@-$?]{%+%", 30, 0x25b06b59},
++  {__LINE__, 0x4ef8a54b, "+]#$(@&.=:,*];/.!]%/{:){:@(;)$", 30, 0x4ba0d08f},
++  {__LINE__, 0x76ad267a, ")-._.:?[&:.=+}(*$/=!.${;(=$@!}", 30, 0xe26b6aac},
++  {__LINE__, 0x569e613c, ":(_*&%/[[}+,?#$&*+#[([*-/#;%(]", 30, 0x7e2b0a66},
++  {__LINE__, 0x36aa61da, "{[#-;:$/{)(+[}#]/{&!%(@)%:@-$:", 30, 0xb3430dc7},
++  {__LINE__, 0xf67222df, "_{$*,}(&,@.)):=!/%(&(,,-?$}}}!", 30, 0x626c17a},
++  {__LINE__, 0x74b34fd3, "e$98KNzqaV)Y:2X?]77].{gKRD4G5{mHZk,Z)SpU%L3FSgv!Wb8MLAFdi{+fp)c,@8m6v)yXg@]HBDFk?.4&}g5_udE*JHCiH=aL", 100, 0xccf98060},
++  {__LINE__, 0x351fd770, "r*Fd}ef+5RJQ;+W=4jTR9)R*p!B;]Ed7tkrLi;88U7g@3v!5pk2X6D)vt,.@N8c]@yyEcKi[vwUu@.Ppm@C6%Mv*3Nw}Y,58_aH)", 100, 0xd8b95312},
++  {__LINE__, 0xc45aef77, "h{bcmdC+a;t+Cf{6Y_dFq-{X4Yu&7uNfVDh?q&_u.UWJU],-GiH7ADzb7-V.Q%4=+v!$L9W+T=bP]$_:]Vyg}A.ygD.r;h-D]m%&", 100, 0xbb1c9912},
++  {__LINE__, 0xc45aef77, "h{bcmdC+a;t+Cf{6Y_dFq-{X4Yu&7uNfVDh?q&_u.UWJU],-GiH7ADzb7-V.Q%4=+v!$L9W+T=bP]$_:]Vyg}A.ygD.r;h-D]m%&"
++                         "h{bcmdC+a;t+Cf{6Y_dFq-{X4Yu&7uNfVDh?q&_u.UWJU],-GiH7ADzb7-V.Q%4=+v!$L9W+T=bP]$_:]Vyg}A.ygD.r;h-D]m%&"
++                         "h{bcmdC+a;t+Cf{6Y_dFq-{X4Yu&7uNfVDh?q&_u.UWJU],-GiH7ADzb7-V.Q%4=+v!$L9W+T=bP]$_:]Vyg}A.ygD.r;h-D]m%&"
++                         "h{bcmdC+a;t+Cf{6Y_dFq-{X4Yu&7uNfVDh?q&_u.UWJU],-GiH7ADzb7-V.Q%4=+v!$L9W+T=bP]$_:]Vyg}A.ygD.r;h-D]m%&"
++                         "h{bcmdC+a;t+Cf{6Y_dFq-{X4Yu&7uNfVDh?q&_u.UWJU],-GiH7ADzb7-V.Q%4=+v!$L9W+T=bP]$_:]Vyg}A.ygD.r;h-D]m%&"
++                         "h{bcmdC+a;t+Cf{6Y_dFq-{X4Yu&7uNfVDh?q&_u.UWJU],-GiH7ADzb7-V.Q%4=+v!$L9W+T=bP]$_:]Vyg}A.ygD.r;h-D]m%&", 600, 0x888AFA5B}
++};
++
++static const int test_size = sizeof(tests) / sizeof(tests[0]);
++
++int main(void)
++{
++    int i;
++    for (i = 0; i < test_size; i++) {
++        test_crc32(tests[i].crc, (Byte*) tests[i].buf, tests[i].len,
++                   tests[i].expect, tests[i].line);
++    }
++    return 0;
++}
diff --git a/zlib-1.2.12-s390-vectorize-crc32.patch b/zlib-1.2.12-s390-vectorize-crc32.patch
new file mode 100644
index 0000000..5c8f7fb
--- /dev/null
+++ b/zlib-1.2.12-s390-vectorize-crc32.patch
@@ -0,0 +1,425 @@
+From 957bc67cfb4e01403c01fe6243850383183a7c19 Mon Sep 17 00:00:00 2001
+From: Ilya Leoshkevich <iii@linux.ibm.com>
+Date: Thu, 19 Mar 2020 11:52:03 +0100
+Subject: [PATCH] s390x: vectorize crc32
+
+Use vector extensions when compiling for s390x and binutils knows
+about them. At runtime, check whether kernel supports vector
+extensions (it has to be not just the CPU, but also the kernel) and
+choose between the regular and the vectorized implementations.
+---
+ Makefile.in                     |   9 ++
+ configure                       |  28 +++++
+ contrib/gcc/zifunc.h            |  21 +++-
+ contrib/s390/crc32-vx.c         | 195 ++++++++++++++++++++++++++++++++
+ contrib/s390/crc32_z_resolver.c |  41 +++++++
+ crc32.c                         |  11 +-
+ 6 files changed, 301 insertions(+), 4 deletions(-)
+ create mode 100644 contrib/s390/crc32-vx.c
+ create mode 100644 contrib/s390/crc32_z_resolver.c
+
+diff --git a/Makefile.in b/Makefile.in
+index 2e78f3844..04c2f5d53 100644
+--- a/Makefile.in
++++ b/Makefile.in
+@@ -29,6 +29,7 @@ LDFLAGS=
+ TEST_LDFLAGS=-L. libz.a
+ LDSHARED=$(CC)
+ CPP=$(CC) -E
++VGFMAFLAG=
+ 
+ STATICLIB=libz.a
+ SHAREDLIB=libz.so
+@@ -179,6 +180,9 @@ crc32.o: $(SRCDIR)crc32.c
+ crc32_z_power8.o: $(SRCDIR)contrib/power/crc32_z_power8.c
+ 	$(CC) $(CFLAGS) -mcpu=power8 $(ZINC) -c -o $@ $(SRCDIR)contrib/power/crc32_z_power8.c
+ 
++crc32-vx.o: $(SRCDIR)contrib/s390/crc32-vx.c
++	$(CC) $(CFLAGS) $(VGFMAFLAG) $(ZINC) -c -o $@ $(SRCDIR)contrib/s390/crc32-vx.c
++
+ deflate.o: $(SRCDIR)deflate.c
+ 	$(CC) $(CFLAGS) $(ZINC) -c -o $@ $(SRCDIR)deflate.c
+ 
+@@ -229,6 +233,11 @@ crc32.lo: $(SRCDIR)crc32.c
+ 	$(CC) $(SFLAGS) $(ZINC) -DPIC -c -o objs/crc32.o $(SRCDIR)crc32.c
+ 	-@mv objs/crc32.o $@
+ 
++crc32-vx.lo: $(SRCDIR)contrib/s390/crc32-vx.c
++	-@mkdir objs 2>/dev/null || test -d objs
++	$(CC) $(SFLAGS) $(VGFMAFLAG) $(ZINC) -DPIC -c -o objs/crc32-vx.o $(SRCDIR)contrib/s390/crc32-vx.c
++	-@mv objs/crc32-vx.o $@
++
+ crc32_z_power8.lo: $(SRCDIR)contrib/power/crc32_z_power8.c
+ 	-@mkdir objs 2>/dev/null || test -d objs
+ 	$(CC) $(SFLAGS) -mcpu=power8 $(ZINC) -DPIC -c -o objs/crc32_z_power8.o $(SRCDIR)contrib/power/crc32_z_power8.c
+diff --git a/configure b/configure
+index dd01b5c0e..acf94a599 100755
+--- a/configure
++++ b/configure
+@@ -929,6 +929,32 @@ else
+   echo "Checking for Power optimizations support... No." | tee -a configure.log
+ fi
+ 
++# check if we are compiling for s390 and binutils support vector extensions
++VGFMAFLAG=-march=z13
++cat > $test.c <<EOF
++#ifndef __s390__
++#error
++#endif
++EOF
++if try $CC -c $CFLAGS $VGFMAFLAG $test.c; then
++  CFLAGS="$CFLAGS -DHAVE_S390X_VX"
++  SFLAGS="$SFLAGS -DHAVE_S390X_VX"
++  OBJC="$OBJC crc32-vx.o"
++  PIC_OBJC="$PIC_OBJC crc32-vx.lo"
++  echo "Checking for s390 vector extensions... Yes." | tee -a configure.log
++
++  for flag in -mzarch -fzvector; do
++    if try $CC -c $CFLAGS $VGFMAFLAG $flag $test.c; then
++      VGFMAFLAG="$VGFMAFLAG $flag"
++      echo "Checking for $flag... Yes." | tee -a configure.log
++    else
++      echo "Checking for $flag... No." | tee -a configure.log
++    fi
++  done
++else
++  echo "Checking for s390 vector extensions... No." | tee -a configure.log
++fi
++
+ # show the results in the log
+ echo >> configure.log
+ echo ALL = $ALL >> configure.log
+@@ -960,6 +986,7 @@ echo mandir = $mandir >> configure.log
+ echo prefix = $prefix >> configure.log
+ echo sharedlibdir = $sharedlibdir >> configure.log
+ echo uname = $uname >> configure.log
++echo VGFMAFLAG = $VGFMAFLAG >> configure.log
+ 
+ # udpate Makefile with the configure results
+ sed < ${SRCDIR}Makefile.in "
+@@ -969,6 +996,7 @@ sed < ${SRCDIR}Makefile.in "
+ /^LDFLAGS *=/s#=.*#=$LDFLAGS#
+ /^LDSHARED *=/s#=.*#=$LDSHARED#
+ /^CPP *=/s#=.*#=$CPP#
++/^VGFMAFLAG *=/s#=.*#=$VGFMAFLAG#
+ /^STATICLIB *=/s#=.*#=$STATICLIB#
+ /^SHAREDLIB *=/s#=.*#=$SHAREDLIB#
+ /^SHAREDLIBV *=/s#=.*#=$SHAREDLIBV#
+diff --git a/contrib/gcc/zifunc.h b/contrib/gcc/zifunc.h
+index daf4fe442..b62379ed8 100644
+--- a/contrib/gcc/zifunc.h
++++ b/contrib/gcc/zifunc.h
+@@ -8,9 +8,28 @@
+ 
+ /* Helpers for arch optimizations */
+ 
++#if defined(__clang__)
++#if __has_feature(coverage_sanitizer)
++#define Z_IFUNC_NO_SANCOV __attribute__((no_sanitize("coverage")))
++#else /* __has_feature(coverage_sanitizer) */
++#define Z_IFUNC_NO_SANCOV
++#endif /* __has_feature(coverage_sanitizer) */
++#else /* __clang__ */
++#define Z_IFUNC_NO_SANCOV
++#endif /* __clang__ */
++
++#ifdef __s390__
++#define Z_IFUNC_PARAMS unsigned long hwcap
++#define Z_IFUNC_ATTRS Z_IFUNC_NO_SANCOV
++#else /* __s390__ */
++#define Z_IFUNC_PARAMS void
++#define Z_IFUNC_ATTRS
++#endif /* __s390__ */
++
+ #define Z_IFUNC(fname) \
+     typeof(fname) fname __attribute__ ((ifunc (#fname "_resolver"))); \
+-    local typeof(fname) *fname##_resolver(void)
++    Z_IFUNC_ATTRS \
++    local typeof(fname) *fname##_resolver(Z_IFUNC_PARAMS)
+ /* This is a helper macro to declare a resolver for an indirect function
+  * (ifunc). Let's say you have function
+  *
+diff --git a/contrib/s390/crc32-vx.c b/contrib/s390/crc32-vx.c
+new file mode 100644
+index 000000000..fa5387c11
+--- /dev/null
++++ b/contrib/s390/crc32-vx.c
+@@ -0,0 +1,195 @@
++/*
++ * Hardware-accelerated CRC-32 variants for Linux on z Systems
++ *
++ * Use the z/Architecture Vector Extension Facility to accelerate the
++ * computing of bitreflected CRC-32 checksums.
++ *
++ * This CRC-32 implementation algorithm is bitreflected and processes
++ * the least-significant bit first (Little-Endian).
++ *
++ * This code was originally written by Hendrik Brueckner
++ * <brueckner@linux.vnet.ibm.com> for use in the Linux kernel and has been
++ * relicensed under the zlib license.
++ */
++
++#include "../../zutil.h"
++
++#include <stdint.h>
++#include <vecintrin.h>
++
++typedef unsigned char uv16qi __attribute__((vector_size(16)));
++typedef unsigned int uv4si __attribute__((vector_size(16)));
++typedef unsigned long long uv2di __attribute__((vector_size(16)));
++
++uint32_t crc32_le_vgfm_16(uint32_t crc, const unsigned char *buf, size_t len) {
++    /*
++     * The CRC-32 constant block contains reduction constants to fold and
++     * process particular chunks of the input data stream in parallel.
++     *
++     * For the CRC-32 variants, the constants are precomputed according to
++     * these definitions:
++     *
++     *      R1 = [(x4*128+32 mod P'(x) << 32)]' << 1
++     *      R2 = [(x4*128-32 mod P'(x) << 32)]' << 1
++     *      R3 = [(x128+32 mod P'(x) << 32)]'   << 1
++     *      R4 = [(x128-32 mod P'(x) << 32)]'   << 1
++     *      R5 = [(x64 mod P'(x) << 32)]'       << 1
++     *      R6 = [(x32 mod P'(x) << 32)]'       << 1
++     *
++     *      The bitreflected Barret reduction constant, u', is defined as
++     *      the bit reversal of floor(x**64 / P(x)).
++     *
++     *      where P(x) is the polynomial in the normal domain and the P'(x) is the
++     *      polynomial in the reversed (bitreflected) domain.
++     *
++     * CRC-32 (IEEE 802.3 Ethernet, ...) polynomials:
++     *
++     *      P(x)  = 0x04C11DB7
++     *      P'(x) = 0xEDB88320
++     */
++    const uv16qi perm_le2be = {15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0};  /* BE->LE mask */
++    const uv2di r2r1 = {0x1C6E41596, 0x154442BD4};                                     /* R2, R1 */
++    const uv2di r4r3 = {0x0CCAA009E, 0x1751997D0};                                     /* R4, R3 */
++    const uv2di r5 = {0, 0x163CD6124};                                                 /* R5 */
++    const uv2di ru_poly = {0, 0x1F7011641};                                            /* u' */
++    const uv2di crc_poly = {0, 0x1DB710641};                                           /* P'(x) << 1 */
++
++    /*
++     * Load the initial CRC value.
++     *
++     * The CRC value is loaded into the rightmost word of the
++     * vector register and is later XORed with the LSB portion
++     * of the loaded input data.
++     */
++    uv2di v0 = {0, 0};
++    v0 = (uv2di)vec_insert(crc, (uv4si)v0, 3);
++
++    /* Load a 64-byte data chunk and XOR with CRC */
++    uv2di v1 = vec_perm(((uv2di *)buf)[0], ((uv2di *)buf)[0], perm_le2be);
++    uv2di v2 = vec_perm(((uv2di *)buf)[1], ((uv2di *)buf)[1], perm_le2be);
++    uv2di v3 = vec_perm(((uv2di *)buf)[2], ((uv2di *)buf)[2], perm_le2be);
++    uv2di v4 = vec_perm(((uv2di *)buf)[3], ((uv2di *)buf)[3], perm_le2be);
++
++    v1 ^= v0;
++    buf += 64;
++    len -= 64;
++
++    while (len >= 64) {
++        /* Load the next 64-byte data chunk */
++        uv16qi part1 = vec_perm(((uv16qi *)buf)[0], ((uv16qi *)buf)[0], perm_le2be);
++        uv16qi part2 = vec_perm(((uv16qi *)buf)[1], ((uv16qi *)buf)[1], perm_le2be);
++        uv16qi part3 = vec_perm(((uv16qi *)buf)[2], ((uv16qi *)buf)[2], perm_le2be);
++        uv16qi part4 = vec_perm(((uv16qi *)buf)[3], ((uv16qi *)buf)[3], perm_le2be);
++
++        /*
++         * Perform a GF(2) multiplication of the doublewords in V1 with
++         * the R1 and R2 reduction constants in V0.  The intermediate result
++         * is then folded (accumulated) with the next data chunk in PART1 and
++         * stored in V1. Repeat this step for the register contents
++         * in V2, V3, and V4 respectively.
++         */
++        v1 = (uv2di)vec_gfmsum_accum_128(r2r1, v1, part1);
++        v2 = (uv2di)vec_gfmsum_accum_128(r2r1, v2, part2);
++        v3 = (uv2di)vec_gfmsum_accum_128(r2r1, v3, part3);
++        v4 = (uv2di)vec_gfmsum_accum_128(r2r1, v4, part4);
++
++        buf += 64;
++        len -= 64;
++    }
++
++    /*
++     * Fold V1 to V4 into a single 128-bit value in V1.  Multiply V1 with R3
++     * and R4 and accumulating the next 128-bit chunk until a single 128-bit
++     * value remains.
++     */
++    v1 = (uv2di)vec_gfmsum_accum_128(r4r3, v1, (uv16qi)v2);
++    v1 = (uv2di)vec_gfmsum_accum_128(r4r3, v1, (uv16qi)v3);
++    v1 = (uv2di)vec_gfmsum_accum_128(r4r3, v1, (uv16qi)v4);
++
++    while (len >= 16) {
++        /* Load next data chunk */
++        v2 = vec_perm(*(uv2di *)buf, *(uv2di *)buf, perm_le2be);
++
++        /* Fold next data chunk */
++        v1 = (uv2di)vec_gfmsum_accum_128(r4r3, v1, (uv16qi)v2);
++
++        buf += 16;
++        len -= 16;
++    }
++
++    /*
++     * Set up a vector register for byte shifts.  The shift value must
++     * be loaded in bits 1-4 in byte element 7 of a vector register.
++     * Shift by 8 bytes: 0x40
++     * Shift by 4 bytes: 0x20
++     */
++    uv16qi v9 = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
++    v9 = vec_insert((unsigned char)0x40, v9, 7);
++
++    /*
++     * Prepare V0 for the next GF(2) multiplication: shift V0 by 8 bytes
++     * to move R4 into the rightmost doubleword and set the leftmost
++     * doubleword to 0x1.
++     */
++    v0 = vec_srb(r4r3, (uv2di)v9);
++    v0[0] = 1;
++
++    /*
++     * Compute GF(2) product of V1 and V0.  The rightmost doubleword
++     * of V1 is multiplied with R4.  The leftmost doubleword of V1 is
++     * multiplied by 0x1 and is then XORed with rightmost product.
++     * Implicitly, the intermediate leftmost product becomes padded
++     */
++    v1 = (uv2di)vec_gfmsum_128(v0, v1);
++
++    /*
++     * Now do the final 32-bit fold by multiplying the rightmost word
++     * in V1 with R5 and XOR the result with the remaining bits in V1.
++     *
++     * To achieve this by a single VGFMAG, right shift V1 by a word
++     * and store the result in V2 which is then accumulated.  Use the
++     * vector unpack instruction to load the rightmost half of the
++     * doubleword into the rightmost doubleword element of V1; the other
++     * half is loaded in the leftmost doubleword.
++     * The vector register with CONST_R5 contains the R5 constant in the
++     * rightmost doubleword and the leftmost doubleword is zero to ignore
++     * the leftmost product of V1.
++     */
++    v9 = vec_insert((unsigned char)0x20, v9, 7);
++    v2 = vec_srb(v1, (uv2di)v9);
++    v1 = vec_unpackl((uv4si)v1);  /* Split rightmost doubleword */
++    v1 = (uv2di)vec_gfmsum_accum_128(r5, v1, (uv16qi)v2);
++
++    /*
++     * Apply a Barret reduction to compute the final 32-bit CRC value.
++     *
++     * The input values to the Barret reduction are the degree-63 polynomial
++     * in V1 (R(x)), degree-32 generator polynomial, and the reduction
++     * constant u.  The Barret reduction result is the CRC value of R(x) mod
++     * P(x).
++     *
++     * The Barret reduction algorithm is defined as:
++     *
++     *    1. T1(x) = floor( R(x) / x^32 ) GF2MUL u
++     *    2. T2(x) = floor( T1(x) / x^32 ) GF2MUL P(x)
++     *    3. C(x)  = R(x) XOR T2(x) mod x^32
++     *
++     *  Note: The leftmost doubleword of vector register containing
++     *  CONST_RU_POLY is zero and, thus, the intermediate GF(2) product
++     *  is zero and does not contribute to the final result.
++     */
++
++    /* T1(x) = floor( R(x) / x^32 ) GF2MUL u */
++    v2 = vec_unpackl((uv4si)v1);
++    v2 = (uv2di)vec_gfmsum_128(ru_poly, v2);
++
++    /*
++     * Compute the GF(2) product of the CRC polynomial with T1(x) in
++     * V2 and XOR the intermediate result, T2(x), with the value in V1.
++     * The final result is stored in word element 2 of V2.
++     */
++    v2 = vec_unpackl((uv4si)v2);
++    v2 = (uv2di)vec_gfmsum_accum_128(crc_poly, v2, (uv16qi)v1);
++
++    return ((uv4si)v2)[2];
++}
+diff --git a/contrib/s390/crc32_z_resolver.c b/contrib/s390/crc32_z_resolver.c
+new file mode 100644
+index 000000000..9749cab40
+--- /dev/null
++++ b/contrib/s390/crc32_z_resolver.c
+@@ -0,0 +1,41 @@
++#include <sys/auxv.h>
++#include "../gcc/zifunc.h"
++
++#define VX_MIN_LEN 64
++#define VX_ALIGNMENT 16L
++#define VX_ALIGN_MASK (VX_ALIGNMENT - 1)
++
++unsigned int crc32_le_vgfm_16(unsigned int crc, const unsigned char FAR *buf, z_size_t len);
++
++local unsigned long s390_crc32_vx(unsigned long crc, const unsigned char FAR *buf, z_size_t len)
++{
++    uintptr_t prealign, aligned, remaining;
++
++    if (buf == Z_NULL) return 0UL;
++
++    if (len < VX_MIN_LEN + VX_ALIGN_MASK)
++        return crc32_z_default(crc, buf, len);
++
++    if ((uintptr_t)buf & VX_ALIGN_MASK) {
++        prealign = VX_ALIGNMENT - ((uintptr_t)buf & VX_ALIGN_MASK);
++        len -= prealign;
++        crc = crc32_z_default(crc, buf, prealign);
++        buf += prealign;
++    }
++    aligned = len & ~VX_ALIGN_MASK;
++    remaining = len & VX_ALIGN_MASK;
++
++    crc = crc32_le_vgfm_16(crc ^ 0xffffffff, buf, (size_t)aligned) ^ 0xffffffff;
++
++    if (remaining)
++        crc = crc32_z_default(crc, buf + aligned, remaining);
++
++    return crc;
++}
++
++Z_IFUNC(crc32_z)
++{
++    if (hwcap & HWCAP_S390_VX)
++        return s390_crc32_vx;
++    return crc32_z_default;
++}
+diff --git a/crc32.c b/crc32.c
+index ae7b7e792..c2122615b 100644
+--- a/crc32.c
++++ b/crc32.c
+@@ -736,12 +736,12 @@ local z_word_t crc_word_big(data)
+ #endif
+ 
+ /* ========================================================================= */
+-#ifdef Z_POWER_OPT
++#if defined(Z_POWER_OPT) || defined(HAVE_S390X_VX)
+ /* Rename function so resolver can use its symbol. The default version will be
+  * returned by the resolver if the host has no support for an optimized version.
+  */
+ #define crc32_z crc32_z_default
+-#endif /* Z_POWER_OPT */
++#endif /* defined(Z_POWER_OPT) || defined(HAVE_S390X_VX) */
+ 
+ unsigned long ZEXPORT crc32_z(crc, buf, len)
+     unsigned long crc;
+@@ -1064,10 +1064,15 @@ unsigned long ZEXPORT crc32_z(crc, buf, len)
+     return crc ^ 0xffffffff;
+ }
+ 
+-#ifdef Z_POWER_OPT
++#if defined(Z_POWER_OPT) || defined(HAVE_S390X_VX)
+ #undef crc32_z
++#ifdef Z_POWER_OPT
+ #include "contrib/power/crc32_z_resolver.c"
+ #endif /* Z_POWER_OPT */
++#ifdef HAVE_S390X_VX
++#include "contrib/s390/crc32_z_resolver.c"
++#endif /* HAVE_S390X_VX */
++#endif /* defined(Z_POWER_OPT) || defined(HAVE_S390X_VX) */
+ 
+ #endif
+ 
diff --git a/zlib-1.2.12.tar.gz b/zlib-1.2.12.tar.gz
new file mode 100644
index 0000000..a572d32
--- /dev/null
+++ b/zlib-1.2.12.tar.gz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:91844808532e5ce316b3c010929493c0244f3d37593afd6de04f71821d5136d9
+size 1490071
diff --git a/zlib-1.2.12.tar.gz.asc b/zlib-1.2.12.tar.gz.asc
new file mode 100644
index 0000000..a4c7be2
--- /dev/null
+++ b/zlib-1.2.12.tar.gz.asc
@@ -0,0 +1,7 @@
+-----BEGIN PGP SIGNATURE-----
+Comment: GPGTools - http://gpgtools.org
+
+iF0EABECAB0WIQRe1GpnIdNlWHeR4qp4P82OWLyvugUCYkEexwAKCRB4P82OWLyv
+ulGRAJ9CLw3LBVZKeIM2JY0MS3obrzTSzgCgqEHUCY42CMzYyrTLazKS6ymTC/4=
+=mgXG
+-----END PGP SIGNATURE-----
diff --git a/zlib-1.2.5-minizip-fixuncrypt.patch b/zlib-1.2.5-minizip-fixuncrypt.patch
new file mode 100644
index 0000000..2c6fa8e
--- /dev/null
+++ b/zlib-1.2.5-minizip-fixuncrypt.patch
@@ -0,0 +1,24 @@
+From 9352e84c149d02ec0df78e19dad55b7f83185622 Mon Sep 17 00:00:00 2001
+From: Ilya Leoshkevich <iii@linux.ibm.com>
+Date: Wed, 27 Apr 2022 14:36:43 +0200
+Subject: [PATCH] zlib-1.2.5-minizip-fixuncrypt.patch
+
+---
+ contrib/minizip/unzip.c | 4 ----
+ 1 file changed, 4 deletions(-)
+
+diff --git a/contrib/minizip/unzip.c b/contrib/minizip/unzip.c
+index 5e12e4747..aa1a92d17 100644
+--- a/contrib/minizip/unzip.c
++++ b/contrib/minizip/unzip.c
+@@ -68,10 +68,6 @@
+ #include <stdlib.h>
+ #include <string.h>
+ 
+-#ifndef NOUNCRYPT
+-        #define NOUNCRYPT
+-#endif
+-
+ #include "zlib.h"
+ #include "unzip.h"
+ 
diff --git a/zlib-format.patch b/zlib-format.patch
index 7f6e0f9..18859fe 100644
--- a/zlib-format.patch
+++ b/zlib-format.patch
@@ -5,7 +5,7 @@ Index: zlib.h
 ===================================================================
 --- zlib.h.orig
 +++ zlib.h
-@@ -1464,7 +1464,11 @@ ZEXTERN z_size_t ZEXPORT gzfwrite OF((vo
+@@ -1465,7 +1465,11 @@ ZEXTERN z_size_t ZEXPORT gzfwrite OF((vo
     is returned, and the error state is set to Z_STREAM_ERROR.
  */
  
@@ -16,5 +16,5 @@ Index: zlib.h
 +#endif
 +;
  /*
-      Converts, formats, and writes the arguments to the compressed file under
-    control of the format string, as in fprintf.  gzprintf returns the number of
+      Convert, format, compress, and write the arguments (...) to file under
+    control of the string format, as in fprintf.  gzprintf returns the number of
diff --git a/zlib-no-version-check.patch b/zlib-no-version-check.patch
index 67a9661..95337d0 100644
--- a/zlib-no-version-check.patch
+++ b/zlib-no-version-check.patch
@@ -1,7 +1,7 @@
-Index: zlib-1.2.11/infback.c
+Index: zlib-1.2.12/infback.c
 ===================================================================
---- zlib-1.2.11.orig/infback.c
-+++ zlib-1.2.11/infback.c
+--- zlib-1.2.12.orig/infback.c
++++ zlib-1.2.12/infback.c
 @@ -34,9 +34,6 @@ int stream_size;
  {
      struct inflate_state FAR *state;
@@ -12,11 +12,11 @@ Index: zlib-1.2.11/infback.c
      if (strm == Z_NULL || window == Z_NULL ||
          windowBits < 8 || windowBits > 15)
          return Z_STREAM_ERROR;
-Index: zlib-1.2.11/inflate.c
+Index: zlib-1.2.12/inflate.c
 ===================================================================
---- zlib-1.2.11.orig/inflate.c
-+++ zlib-1.2.11/inflate.c
-@@ -219,9 +219,6 @@ int stream_size;
+--- zlib-1.2.12.orig/inflate.c
++++ zlib-1.2.12/inflate.c
+@@ -202,9 +202,6 @@ int stream_size;
      int ret;
      struct inflate_state FAR *state;
  
@@ -26,21 +26,16 @@ Index: zlib-1.2.11/inflate.c
      if (strm == Z_NULL) return Z_STREAM_ERROR;
      strm->msg = Z_NULL;                 /* in case we return an error */
      if (strm->zalloc == (alloc_func)0) {
-Index: zlib-1.2.11/deflate.c
+Index: zlib-1.2.12/deflate.c
 ===================================================================
---- zlib-1.2.11.orig/deflate.c
-+++ zlib-1.2.11/deflate.c
-@@ -263,17 +263,12 @@ int ZEXPORT deflateInit2_(strm, level, m
+--- zlib-1.2.12.orig/deflate.c
++++ zlib-1.2.12/deflate.c
+@@ -253,12 +253,7 @@ int ZEXPORT deflateInit2_(strm, level, m
  {
      deflate_state *s;
      int wrap = 1;
 -    static const char my_version[] = ZLIB_VERSION;
  
-     ushf *overlay;
-     /* We overlay pending_buf and d_buf+l_buf. This works since the average
-      * output size for (length,distance) codes is <= 24 bits.
-      */
- 
 -    if (version == Z_NULL || version[0] != my_version[0] ||
 -        stream_size != sizeof(z_stream)) {
 -        return Z_VERSION_ERROR;
diff --git a/zlib-rpmlintrc b/zlib-rpmlintrc
index 28cc7b9..0905c70 100644
--- a/zlib-rpmlintrc
+++ b/zlib-rpmlintrc
@@ -1,4 +1,2 @@
-# zlib-devel require libz1 - zlib produces libz, not libzlib
-addFilter("zlib-devel.*: W: no-dependency-on zlib*/zlib-libs/libzlib")
 # used only if build --with profiling
 addFilter("zlib.src.*: W: make-check-outside-check-section time make check")
diff --git a/zlib.changes b/zlib.changes
index a809e69..316d2bb 100644
--- a/zlib.changes
+++ b/zlib.changes
@@ -1,3 +1,43 @@
+-------------------------------------------------------------------
+Tue Aug 23 16:22:59 UTC 2022 - Danilo Spinella <danilo.spinella@suse.com>
+
+- Update to 1.2.12:
+  * A lot of bug fixes
+  * Improve speed of crc32 functions
+  * Use ARM crc32 instructions if the ARM architecture has them
+  For the complete changes, see ChangeLog
+- Fixes CVE-2022-37434,  heap-based buffer over-read or buffer overflow in
+  inflate.c via a large gzip header extra field
+  (CVE-2022-37434, bsc#1202175)
+- Added patches:
+  * zlib-1.2.11-covscan-issues-rhel9.patch
+  * zlib-1.2.11-covscan-issues.patch
+  * zlib-1.2.12-s390-vectorize-crc32.patch
+  * zlib-1.2.12-optimized-crc32-power8.patch
+  * zlib-1.2.12-IBM-Z-hw-accelerated-deflate-s390x.patch
+  * zlib-1.2.12-fix-configure.patch
+  * zlib-1.2.12-correct-inputs-provided-to-crc-func.patch
+  * zlib-1.2.12-fix-CVE-2022-37434.patch
+  * zlib-1.2.5-minizip-fixuncrypt.patch
+- Removed patches:
+  * bsc1197459.patch (upstreamed)
+  * zlib-power8-fate325307.patch
+    (replaced by zlib-1.2.12-optimized-crc32-power8.patch)
+  * bsc1174736-DFLTCC_LEVEL_MASK-set-to-0x1ff.patch
+    (replaced by zlib-1.2.12-IBM-Z-hw-accelrated-deflate-s390x.patch)
+  * 410.patch
+    (replaced by zlib-1.2.12-IBM-Z-hw-accelrated-deflate-s390x.patch)
+- Refreshed patches:
+  * zlib-format.patch
+  * zlib-no-version-check.patch
+- Disable profiling since it breaks tests
+- Update zlib-rpmlintrc
+
+-------------------------------------------------------------------
+Sat Jul  2 10:00:46 UTC 2022 - Marcus Meissner <meissner@suse.com>
+
+- switch to https urls
+
 -------------------------------------------------------------------
 Fri Mar 25 14:59:29 UTC 2022 - Danilo Spinella <danilo.spinella@suse.com>
 
diff --git a/zlib.spec b/zlib.spec
index 12cb9a9..f74e6ad 100644
--- a/zlib.spec
+++ b/zlib.spec
@@ -17,35 +17,39 @@
 
 
 Name:           zlib
-Version:        1.2.11
+Version:        1.2.12
 Release:        0
 Summary:        Library implementing the DEFLATE compression algorithm
 License:        Zlib
-URL:            http://www.zlib.net/
-Source0:        http://zlib.net/zlib-%{version}.tar.gz
-Source1:        http://zlib.net/zlib-%{version}.tar.gz.asc
+URL:            https://www.zlib.net/
+Source0:        https://zlib.net/zlib-%{version}.tar.gz
+Source1:        https://zlib.net/zlib-%{version}.tar.gz.asc
 Source2:        %{name}.keyring
 Source4:        LICENSE
 Source5:        baselibs.conf
 Source6:        zlib-rpmlintrc
-#PATCH-FIX-SUSE: fate#314093, sent upstream by IBM
-Patch0:         zlib-1.2.11-optimized-s390.patch
 #PATCH-FIX-SUSE: compiler check of varguments passed to gzprintf
 Patch1:         zlib-format.patch
 #PATCH-FIX-UPSTREAM do not store negative values in uInt
 Patch2:         0001-Do-not-try-to-store-negative-values-in-unsigned-int.patch
-#PATCH-FIX-UPSTREAM https://github.com/madler/zlib/pull/335
-Patch3:         zlib-power8-fate325307.patch
 #PATCH-FIX-SUSE do not check exact version match as the lib can be updated
 #               we should simply rely on soname versioning to protect us
-Patch5:         zlib-no-version-check.patch
-Patch6:         bsc1174736-DFLTCC_LEVEL_MASK-set-to-0x1ff.patch
+Patch3:         zlib-no-version-check.patch
+#PATCH-FIX-UPSTREAM https://github.com/madler/zlib/commit/ec3df00224d4
+Patch4:         zlib-1.2.12-correct-inputs-provided-to-crc-func.patch
+#PATCH-FIX-UPSTREAM https://github.com/madler/zlib/commit/1eb7682f845ac9e9bf9ae35bbfb3bad5dacbd91d
+Patch5:         zlib-1.2.12-fix-CVE-2022-37434.patch
 #PATCH-FIX-UPSTREAM https://github.com/madler/zlib/pull/229
-Patch10:        minizip-dont-install-crypt-header.patch
-#PATCH-FIX-UPSTREAM https://github.com/madler/zlib/commit/5c44459c3b28a9bd3283aaceab7c615f8020c531
-Patch11:        bsc1197459.patch
-#PATCH-FIX-UPSTREAM https://github.com/madler/zlib/pull/410
-Patch101:       410.patch
+Patch6:         minizip-dont-install-crypt-header.patch
+# The following patches are taken from https://github.com/iii-i/zlib/commits/crc32vx-v3
+Patch7:         zlib-1.2.5-minizip-fixuncrypt.patch
+Patch8:         zlib-1.2.11-optimized-s390.patch
+Patch9:         zlib-1.2.12-IBM-Z-hw-accelerated-deflate-s390x.patch
+Patch10:        zlib-1.2.11-covscan-issues.patch
+Patch11:        zlib-1.2.11-covscan-issues-rhel9.patch
+Patch12:        zlib-1.2.12-optimized-crc32-power8.patch
+Patch13:        zlib-1.2.12-fix-configure.patch
+Patch14:        zlib-1.2.12-s390-vectorize-crc32.patch
 BuildRequires:  autoconf
 BuildRequires:  automake
 BuildRequires:  libtool
@@ -130,15 +134,20 @@ It should exit 0
 
 %prep
 %setup -q
-%patch0
 %patch1
 %patch2 -p1
 %patch3 -p1
+%patch4 -p1
 %patch5 -p1
 %patch6 -p1
+%patch7 -p1
+%patch8
+%patch9 -p1
 %patch10 -p1
 %patch11 -p1
-%patch101 -p1
+%patch12 -p1
+%patch13 -p1
+%patch14 -p1
 cp %{SOURCE4} .
 
 %build
@@ -155,14 +164,16 @@ CC="cc" ./configure \
 %endif
     %{nil}
 
-%if %{do_profiling}
-  make %{?_smp_mflags} CFLAGS="%{optflags} %{cflags_profile_generate}"
-  make check %{?_smp_mflags}
-  make %{?_smp_mflags} clean
-  make %{?_smp_mflags} CFLAGS="%{optflags} %{cflags_profile_feedback}"
-%else
+# Profiling flags breaks tests, as of 1.2.12
+# In particular, gzseek does not work as intended
+#%if %{do_profiling}
+#  #make %{?_smp_mflags} CFLAGS="%{optflags} %{cflags_profile_generate}"
+#  make check %{?_smp_mflags}
+#  #make %{?_smp_mflags} clean
+#  #make %{?_smp_mflags} CFLAGS="%{optflags} %{cflags_profile_feedback}"
+#%else
   make %{?_smp_mflags}
-%endif
+#%endif
 
 # And build minizip
 cd contrib/minizip