- Add support for zero-sized VLAs and allocas with
-fstack-clash-protection. [bnc #1059075] Changes gcc43-stack-probe.diff . OBS-URL: https://build.opensuse.org/package/show/devel:gcc/gcc7?expand=0&rev=83
This commit is contained in:
Michael Matz
Git OBS Bridge
parent
22c9ab68c4
commit
202e5ccf04
@ -1,3 +1,10 @@
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-------------------------------------------------------------------
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Mon Sep 25 20:22:09 UTC 2017 - matz@suse.de
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- Add support for zero-sized VLAs and allocas with
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-fstack-clash-protection. [bnc #1059075]
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Changes gcc43-stack-probe.diff .
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-------------------------------------------------------------------
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Tue Aug 29 07:17:15 UTC 2017 - rguenther@suse.com
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@ -1,3 +1,10 @@
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-------------------------------------------------------------------
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Mon Sep 25 20:22:09 UTC 2017 - matz@suse.de
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- Add support for zero-sized VLAs and allocas with
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-fstack-clash-protection. [bnc #1059075]
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Changes gcc43-stack-probe.diff .
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-------------------------------------------------------------------
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Tue Aug 29 07:17:15 UTC 2017 - rguenther@suse.com
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@ -1,3 +1,10 @@
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-------------------------------------------------------------------
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Mon Sep 25 20:22:09 UTC 2017 - matz@suse.de
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- Add support for zero-sized VLAs and allocas with
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-fstack-clash-protection. [bnc #1059075]
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Changes gcc43-stack-probe.diff .
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-------------------------------------------------------------------
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Tue Aug 29 07:17:15 UTC 2017 - rguenther@suse.com
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@ -1,3 +1,10 @@
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-------------------------------------------------------------------
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Mon Sep 25 20:22:09 UTC 2017 - matz@suse.de
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- Add support for zero-sized VLAs and allocas with
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-fstack-clash-protection. [bnc #1059075]
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Changes gcc43-stack-probe.diff .
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-------------------------------------------------------------------
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Tue Aug 29 07:17:15 UTC 2017 - rguenther@suse.com
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@ -1,3 +1,10 @@
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-------------------------------------------------------------------
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Mon Sep 25 20:22:09 UTC 2017 - matz@suse.de
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- Add support for zero-sized VLAs and allocas with
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-fstack-clash-protection. [bnc #1059075]
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Changes gcc43-stack-probe.diff .
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-------------------------------------------------------------------
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Tue Aug 29 07:17:15 UTC 2017 - rguenther@suse.com
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@ -1,3 +1,10 @@
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-------------------------------------------------------------------
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Mon Sep 25 20:22:09 UTC 2017 - matz@suse.de
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- Add support for zero-sized VLAs and allocas with
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-fstack-clash-protection. [bnc #1059075]
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Changes gcc43-stack-probe.diff .
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-------------------------------------------------------------------
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Tue Aug 29 07:17:15 UTC 2017 - rguenther@suse.com
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@ -1,3 +1,10 @@
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-------------------------------------------------------------------
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Mon Sep 25 20:22:09 UTC 2017 - matz@suse.de
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- Add support for zero-sized VLAs and allocas with
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-fstack-clash-protection. [bnc #1059075]
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Changes gcc43-stack-probe.diff .
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-------------------------------------------------------------------
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Tue Aug 29 07:17:15 UTC 2017 - rguenther@suse.com
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@ -1,3 +1,10 @@
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-------------------------------------------------------------------
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Mon Sep 25 20:22:09 UTC 2017 - matz@suse.de
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- Add support for zero-sized VLAs and allocas with
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-fstack-clash-protection. [bnc #1059075]
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Changes gcc43-stack-probe.diff .
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-------------------------------------------------------------------
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Tue Aug 29 07:17:15 UTC 2017 - rguenther@suse.com
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@ -1,3 +1,10 @@
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-------------------------------------------------------------------
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Mon Sep 25 20:22:09 UTC 2017 - matz@suse.de
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- Add support for zero-sized VLAs and allocas with
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-fstack-clash-protection. [bnc #1059075]
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Changes gcc43-stack-probe.diff .
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-------------------------------------------------------------------
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Tue Aug 29 07:17:15 UTC 2017 - rguenther@suse.com
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@ -1,3 +1,10 @@
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-------------------------------------------------------------------
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Mon Sep 25 20:22:09 UTC 2017 - matz@suse.de
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- Add support for zero-sized VLAs and allocas with
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-fstack-clash-protection. [bnc #1059075]
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Changes gcc43-stack-probe.diff .
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-------------------------------------------------------------------
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Tue Aug 29 07:17:15 UTC 2017 - rguenther@suse.com
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@ -1,3 +1,10 @@
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-------------------------------------------------------------------
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Mon Sep 25 20:22:09 UTC 2017 - matz@suse.de
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- Add support for zero-sized VLAs and allocas with
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-fstack-clash-protection. [bnc #1059075]
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Changes gcc43-stack-probe.diff .
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-------------------------------------------------------------------
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Tue Aug 29 07:17:15 UTC 2017 - rguenther@suse.com
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@ -1,3 +1,10 @@
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-------------------------------------------------------------------
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Mon Sep 25 20:22:09 UTC 2017 - matz@suse.de
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- Add support for zero-sized VLAs and allocas with
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-fstack-clash-protection. [bnc #1059075]
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Changes gcc43-stack-probe.diff .
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-------------------------------------------------------------------
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Tue Aug 29 07:17:15 UTC 2017 - rguenther@suse.com
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@ -1,3 +1,10 @@
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-------------------------------------------------------------------
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Mon Sep 25 20:22:09 UTC 2017 - matz@suse.de
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- Add support for zero-sized VLAs and allocas with
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-fstack-clash-protection. [bnc #1059075]
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Changes gcc43-stack-probe.diff .
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-------------------------------------------------------------------
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Tue Aug 29 07:17:15 UTC 2017 - rguenther@suse.com
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@ -1,3 +1,10 @@
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-------------------------------------------------------------------
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Mon Sep 25 20:22:09 UTC 2017 - matz@suse.de
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- Add support for zero-sized VLAs and allocas with
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-fstack-clash-protection. [bnc #1059075]
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Changes gcc43-stack-probe.diff .
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-------------------------------------------------------------------
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Tue Aug 29 07:17:15 UTC 2017 - rguenther@suse.com
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@ -1,3 +1,10 @@
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-------------------------------------------------------------------
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Mon Sep 25 20:22:09 UTC 2017 - matz@suse.de
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- Add support for zero-sized VLAs and allocas with
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-fstack-clash-protection. [bnc #1059075]
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Changes gcc43-stack-probe.diff .
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-------------------------------------------------------------------
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Tue Aug 29 07:17:15 UTC 2017 - rguenther@suse.com
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@ -1,3 +1,10 @@
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-------------------------------------------------------------------
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Mon Sep 25 20:22:09 UTC 2017 - matz@suse.de
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- Add support for zero-sized VLAs and allocas with
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-fstack-clash-protection. [bnc #1059075]
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Changes gcc43-stack-probe.diff .
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-------------------------------------------------------------------
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Tue Aug 29 07:17:15 UTC 2017 - rguenther@suse.com
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@ -1,3 +1,10 @@
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-------------------------------------------------------------------
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Mon Sep 25 20:22:09 UTC 2017 - matz@suse.de
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- Add support for zero-sized VLAs and allocas with
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-fstack-clash-protection. [bnc #1059075]
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Changes gcc43-stack-probe.diff .
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-------------------------------------------------------------------
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Tue Aug 29 07:17:15 UTC 2017 - rguenther@suse.com
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@ -1,3 +1,10 @@
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-------------------------------------------------------------------
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Mon Sep 25 20:22:09 UTC 2017 - matz@suse.de
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- Add support for zero-sized VLAs and allocas with
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-fstack-clash-protection. [bnc #1059075]
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Changes gcc43-stack-probe.diff .
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-------------------------------------------------------------------
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Tue Aug 29 07:17:15 UTC 2017 - rguenther@suse.com
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@ -30,12 +30,12 @@ Index: gcc/explow.c
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HOST_WIDE_INT stack_usage_size = -1;
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rtx_code_label *final_label;
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rtx final_target, target;
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+ rtx loop_lab, end_lab, last_size;
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+ rtx loop_lab, end_lab, skip_lab, last_size, before_skip;
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+ int probe_pass = 0;
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/* If we're asking for zero bytes, it doesn't matter what we point
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to since we can't dereference it. But return a reasonable
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@@ -1440,6 +1444,24 @@ allocate_dynamic_stack_space (rtx size,
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@@ -1440,6 +1444,30 @@ allocate_dynamic_stack_space (rtx size,
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/* Don't let anti_adjust_stack emit notes. */
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suppress_reg_args_size = true;
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@ -47,6 +47,12 @@ Index: gcc/explow.c
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+ size = copy_to_mode_reg (Pmode, convert_to_mode (Pmode, size, 1));
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+ loop_lab = gen_label_rtx ();
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+ end_lab = gen_label_rtx ();
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+ skip_lab = gen_label_rtx ();
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+ /* We insert 'target = virtual_stack_dynamic_rtx' here, but target
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+ is changed later, so that insn can be constructed only later. */
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+ before_skip = get_last_insn ();
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+ emit_cmp_and_jump_insns (size, CONST0_RTX (Pmode), EQ, NULL_RTX,
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+ Pmode, 1, skip_lab);
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+ emit_label (loop_lab);
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+ emit_cmp_and_jump_insns (size, GEN_INT (PROBE_INTERVAL), LTU,
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+ NULL_RTX, Pmode, 1, end_lab);
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/* Perform the required allocation from the stack. Some systems do
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this differently than simply incrementing/decrementing from the
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stack pointer, such as acquiring the space by calling malloc(). */
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@@ -1499,6 +1521,15 @@ allocate_dynamic_stack_space (rtx size,
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@@ -1499,6 +1527,15 @@ allocate_dynamic_stack_space (rtx size,
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if (STACK_GROWS_DOWNWARD)
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emit_move_insn (target, virtual_stack_dynamic_rtx);
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}
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suppress_reg_args_size = false;
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@@ -1510,6 +1541,8 @@ allocate_dynamic_stack_space (rtx size,
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@@ -1510,6 +1547,17 @@ allocate_dynamic_stack_space (rtx size,
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emit_label (final_label);
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target = final_target;
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}
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+ if (flag_stack_clash_protection)
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+ {
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+ rtx seq;
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+ emit_stack_probe (target);
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+ emit_label (skip_lab);
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+ start_sequence ();
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+ emit_move_insn (target, virtual_stack_dynamic_rtx);
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+ seq = get_insns ();
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+ end_sequence ();
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+ emit_insn_after (seq, before_skip);
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+ }
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target = align_dynamic_address (target, required_align);
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@@ -1593,8 +1626,6 @@ emit_stack_probe (rtx address)
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@@ -1593,8 +1641,6 @@ emit_stack_probe (rtx address)
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the current stack pointer. STACK_GROWS_DOWNWARD says whether to add
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or subtract them from the stack pointer. */
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@ -1,3 +1,10 @@
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-------------------------------------------------------------------
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Mon Sep 25 20:22:09 UTC 2017 - matz@suse.de
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- Add support for zero-sized VLAs and allocas with
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-fstack-clash-protection. [bnc #1059075]
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Changes gcc43-stack-probe.diff .
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-------------------------------------------------------------------
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Tue Aug 29 07:17:15 UTC 2017 - rguenther@suse.com
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@ -1,3 +1,10 @@
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-------------------------------------------------------------------
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Mon Sep 25 20:22:09 UTC 2017 - matz@suse.de
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- Add support for zero-sized VLAs and allocas with
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-fstack-clash-protection. [bnc #1059075]
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Changes gcc43-stack-probe.diff .
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-------------------------------------------------------------------
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Tue Aug 29 07:17:15 UTC 2017 - rguenther@suse.com
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