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gdb/gdb-r_version-check.patch
Tom de Vries 0b5a82e35e Accepting request 951323 from home:Andreas_Schwab:Factory 
- gdb-r_version-check.patch: gdb: Don't assume r_ldsomap when r_version >
  1 on Linux

OBS-URL: https://build.opensuse.org/request/show/951323
OBS-URL: https://build.opensuse.org/package/show/devel:gcc/gdb?expand=0&rev=315
2022-02-03 14:12:21 +00:00

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From c0154a4a21a3aed01ef53877af05cf0109a0b124 Mon Sep 17 00:00:00 2001
From: "H.J. Lu" <hjl.tools@gmail.com>
Date: Mon, 16 Aug 2021 16:17:25 -0700
Subject: [PATCH] gdb: Don't assume r_ldsomap when r_version > 1 on Linux
The r_ldsomap field is specific to Solaris (part of librtld_db), and
should never be accessed for Linux. glibc is planning to add a field
to support multiple namespaces. But there will be no r_ldsomap when
r_version is bumped to 2. Add linux_[ilp32|lp64]_fetch_link_map_offsets
to set r_ldsomap_offset to -1 and use them for Linux targets.
Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=28236
---
gdb/aarch64-linux-tdep.c | 2 +-
gdb/alpha-linux-tdep.c | 2 +-
gdb/amd64-linux-tdep.c | 4 +--
gdb/arc-linux-tdep.c | 2 +-
gdb/arm-linux-tdep.c | 2 +-
gdb/cris-linux-tdep.c | 2 +-
gdb/csky-linux-tdep.c | 2 +-
gdb/hppa-linux-tdep.c | 2 +-
gdb/i386-linux-tdep.c | 2 +-
gdb/ia64-linux-tdep.c | 2 +-
gdb/linux-tdep.c | 60 +++++++++++++++++++++++++++++++++++++
gdb/linux-tdep.h | 5 ++++
gdb/m32r-linux-tdep.c | 2 +-
gdb/m68k-linux-tdep.c | 2 +-
gdb/microblaze-linux-tdep.c | 2 +-
gdb/mips-linux-tdep.c | 6 ++--
gdb/mn10300-linux-tdep.c | 2 +-
gdb/nios2-linux-tdep.c | 2 +-
gdb/or1k-linux-tdep.c | 2 +-
gdb/ppc-linux-tdep.c | 4 +--
gdb/riscv-linux-tdep.c | 4 +--
gdb/s390-linux-tdep.c | 4 +--
gdb/sh-linux-tdep.c | 2 +-
gdb/sparc-linux-tdep.c | 2 +-
gdb/sparc64-linux-tdep.c | 2 +-
gdb/tilegx-linux-tdep.c | 4 +--
gdb/xtensa-linux-tdep.c | 2 +-
27 files changed, 97 insertions(+), 32 deletions(-)
diff --git a/gdb/aarch64-linux-tdep.c b/gdb/aarch64-linux-tdep.c
index 63c200b47f7..b1225438d9d 100644
--- a/gdb/aarch64-linux-tdep.c
+++ b/gdb/aarch64-linux-tdep.c
@@ -1795,7 +1795,7 @@ aarch64_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
linux_init_abi (info, gdbarch, 1);
set_solib_svr4_fetch_link_map_offsets (gdbarch,
- svr4_lp64_fetch_link_map_offsets);
+ linux_lp64_fetch_link_map_offsets);
/* Enable TLS support. */
set_gdbarch_fetch_tls_load_module_address (gdbarch,
diff --git a/gdb/alpha-linux-tdep.c b/gdb/alpha-linux-tdep.c
index c2cffc13c20..0a00fc1f310 100644
--- a/gdb/alpha-linux-tdep.c
+++ b/gdb/alpha-linux-tdep.c
@@ -374,7 +374,7 @@ alpha_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
set_solib_svr4_fetch_link_map_offsets
- (gdbarch, svr4_lp64_fetch_link_map_offsets);
+ (gdbarch, linux_lp64_fetch_link_map_offsets);
/* Enable TLS support. */
set_gdbarch_fetch_tls_load_module_address (gdbarch,
diff --git a/gdb/amd64-linux-tdep.c b/gdb/amd64-linux-tdep.c
index ac6843c1fdd..715add8a7b0 100644
--- a/gdb/amd64-linux-tdep.c
+++ b/gdb/amd64-linux-tdep.c
@@ -2042,7 +2042,7 @@ amd64_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
/* GNU/Linux uses SVR4-style shared libraries. */
set_solib_svr4_fetch_link_map_offsets
- (gdbarch, svr4_lp64_fetch_link_map_offsets);
+ (gdbarch, linux_lp64_fetch_link_map_offsets);
/* Register DTrace handlers. */
set_gdbarch_dtrace_parse_probe_argument (gdbarch, amd64_dtrace_parse_probe_argument);
@@ -2256,7 +2256,7 @@ amd64_x32_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
/* GNU/Linux uses SVR4-style shared libraries. */
set_solib_svr4_fetch_link_map_offsets
- (gdbarch, svr4_ilp32_fetch_link_map_offsets);
+ (gdbarch, linux_ilp32_fetch_link_map_offsets);
}
void _initialize_amd64_linux_tdep ();
diff --git a/gdb/arc-linux-tdep.c b/gdb/arc-linux-tdep.c
index cf18b8d6b03..448fa370a36 100644
--- a/gdb/arc-linux-tdep.c
+++ b/gdb/arc-linux-tdep.c
@@ -732,7 +732,7 @@ arc_linux_init_osabi (struct gdbarch_info info, struct gdbarch *gdbarch)
/* GNU/Linux uses SVR4-style shared libraries, with 32-bit ints, longs
and pointers (ILP32). */
set_solib_svr4_fetch_link_map_offsets (gdbarch,
- svr4_ilp32_fetch_link_map_offsets);
+ linux_ilp32_fetch_link_map_offsets);
}
/* Suppress warning from -Wmissing-prototypes. */
diff --git a/gdb/arm-linux-tdep.c b/gdb/arm-linux-tdep.c
index 773a93384f7..c0dfc5fcf3e 100644
--- a/gdb/arm-linux-tdep.c
+++ b/gdb/arm-linux-tdep.c
@@ -1763,7 +1763,7 @@ arm_linux_init_abi (struct gdbarch_info info,
tdep->jb_elt_size = ARM_LINUX_JB_ELEMENT_SIZE;
set_solib_svr4_fetch_link_map_offsets
- (gdbarch, svr4_ilp32_fetch_link_map_offsets);
+ (gdbarch, linux_ilp32_fetch_link_map_offsets);
/* Single stepping. */
set_gdbarch_software_single_step (gdbarch, arm_linux_software_single_step);
diff --git a/gdb/cris-linux-tdep.c b/gdb/cris-linux-tdep.c
index 4c1a4529986..68a12dbe0e9 100644
--- a/gdb/cris-linux-tdep.c
+++ b/gdb/cris-linux-tdep.c
@@ -43,7 +43,7 @@ cris_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
svr4_fetch_objfile_link_map);
set_solib_svr4_fetch_link_map_offsets (gdbarch,
- svr4_ilp32_fetch_link_map_offsets);
+ linux_ilp32_fetch_link_map_offsets);
}
diff --git a/gdb/csky-linux-tdep.c b/gdb/csky-linux-tdep.c
index e38ec652561..3a52a87b647 100644
--- a/gdb/csky-linux-tdep.c
+++ b/gdb/csky-linux-tdep.c
@@ -239,7 +239,7 @@ csky_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
set_gdbarch_skip_solib_resolver (gdbarch, glibc_skip_solib_resolver);
set_solib_svr4_fetch_link_map_offsets (gdbarch,
- svr4_ilp32_fetch_link_map_offsets);
+ linux_ilp32_fetch_link_map_offsets);
/* Enable TLS support. */
set_gdbarch_fetch_tls_load_module_address (gdbarch,
diff --git a/gdb/hppa-linux-tdep.c b/gdb/hppa-linux-tdep.c
index 4bdaa1dfaee..52c642f0c7f 100644
--- a/gdb/hppa-linux-tdep.c
+++ b/gdb/hppa-linux-tdep.c
@@ -501,7 +501,7 @@ hppa_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
/* GNU/Linux uses SVR4-style shared libraries. */
set_solib_svr4_fetch_link_map_offsets
- (gdbarch, svr4_ilp32_fetch_link_map_offsets);
+ (gdbarch, linux_ilp32_fetch_link_map_offsets);
tdep->in_solib_call_trampoline = hppa_in_solib_call_trampoline;
set_gdbarch_skip_trampoline_code (gdbarch, hppa_skip_trampoline_code);
diff --git a/gdb/i386-linux-tdep.c b/gdb/i386-linux-tdep.c
index c0df916ce6d..1c065eecb4d 100644
--- a/gdb/i386-linux-tdep.c
+++ b/gdb/i386-linux-tdep.c
@@ -1044,7 +1044,7 @@ i386_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
/* GNU/Linux uses SVR4-style shared libraries. */
set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
set_solib_svr4_fetch_link_map_offsets
- (gdbarch, svr4_ilp32_fetch_link_map_offsets);
+ (gdbarch, linux_ilp32_fetch_link_map_offsets);
/* GNU/Linux uses the dynamic linker included in the GNU C Library. */
set_gdbarch_skip_solib_resolver (gdbarch, glibc_skip_solib_resolver);
diff --git a/gdb/ia64-linux-tdep.c b/gdb/ia64-linux-tdep.c
index a17ec590002..71767ddf83e 100644
--- a/gdb/ia64-linux-tdep.c
+++ b/gdb/ia64-linux-tdep.c
@@ -237,7 +237,7 @@ ia64_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
set_solib_svr4_fetch_link_map_offsets
- (gdbarch, svr4_lp64_fetch_link_map_offsets);
+ (gdbarch, linux_lp64_fetch_link_map_offsets);
/* Enable TLS support. */
set_gdbarch_fetch_tls_load_module_address (gdbarch,
diff --git a/gdb/linux-tdep.c b/gdb/linux-tdep.c
index 637d3d36a0b..ae2f7c14f6d 100644
--- a/gdb/linux-tdep.c
+++ b/gdb/linux-tdep.c
@@ -41,6 +41,7 @@
#include "gdbsupport/gdb_optional.h"
#include "gcore.h"
#include "gcore-elf.h"
+#include "solib-svr4.h"
#include <ctype.h>
@@ -2724,3 +2725,62 @@ more information about this file, refer to the manpage of proc(5) and core(5).")
NULL, show_dump_excluded_mappings,
&setlist, &showlist);
}
+
+/* Fetch (and possibly build) an appropriate `link_map_offsets' for
+ ILP32/LP64 Linux systems which don't have the r_ldsomap field. */
+
+link_map_offsets *
+linux_ilp32_fetch_link_map_offsets ()
+{
+ static link_map_offsets lmo;
+ static link_map_offsets *lmp = nullptr;
+
+ if (lmp == nullptr)
+ {
+ lmp = &lmo;
+
+ lmo.r_version_offset = 0;
+ lmo.r_version_size = 4;
+ lmo.r_map_offset = 4;
+ lmo.r_brk_offset = 8;
+ lmo.r_ldsomap_offset = -1;
+
+ /* Everything we need is in the first 20 bytes. */
+ lmo.link_map_size = 20;
+ lmo.l_addr_offset = 0;
+ lmo.l_name_offset = 4;
+ lmo.l_ld_offset = 8;
+ lmo.l_next_offset = 12;
+ lmo.l_prev_offset = 16;
+ }
+
+ return lmp;
+}
+
+link_map_offsets *
+linux_lp64_fetch_link_map_offsets ()
+{
+ static link_map_offsets lmo;
+ static link_map_offsets *lmp = nullptr;
+
+ if (lmp == nullptr)
+ {
+ lmp = &lmo;
+
+ lmo.r_version_offset = 0;
+ lmo.r_version_size = 4;
+ lmo.r_map_offset = 8;
+ lmo.r_brk_offset = 16;
+ lmo.r_ldsomap_offset = -1;
+
+ /* Everything we need is in the first 40 bytes. */
+ lmo.link_map_size = 40;
+ lmo.l_addr_offset = 0;
+ lmo.l_name_offset = 8;
+ lmo.l_ld_offset = 16;
+ lmo.l_next_offset = 24;
+ lmo.l_prev_offset = 32;
+ }
+
+ return lmp;
+}
diff --git a/gdb/linux-tdep.h b/gdb/linux-tdep.h
index 28b60e46579..b5c1184bb09 100644
--- a/gdb/linux-tdep.h
+++ b/gdb/linux-tdep.h
@@ -98,4 +98,9 @@ extern CORE_ADDR linux_get_hwcap (struct target_ops *target);
error, 0 is returned. */
extern CORE_ADDR linux_get_hwcap2 (struct target_ops *target);
+/* Fetch (and possibly build) an appropriate `struct link_map_offsets'
+ for ILP32 and LP64 Linux systems. */
+extern struct link_map_offsets *linux_ilp32_fetch_link_map_offsets ();
+extern struct link_map_offsets *linux_lp64_fetch_link_map_offsets ();
+
#endif /* linux-tdep.h */
diff --git a/gdb/m32r-linux-tdep.c b/gdb/m32r-linux-tdep.c
index 24807de0b2b..af0b5c01d04 100644
--- a/gdb/m32r-linux-tdep.c
+++ b/gdb/m32r-linux-tdep.c
@@ -461,7 +461,7 @@ m32r_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
/* GNU/Linux uses SVR4-style shared libraries. */
set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
set_solib_svr4_fetch_link_map_offsets
- (gdbarch, svr4_ilp32_fetch_link_map_offsets);
+ (gdbarch, linux_ilp32_fetch_link_map_offsets);
/* Core file support. */
set_gdbarch_iterate_over_regset_sections
diff --git a/gdb/m68k-linux-tdep.c b/gdb/m68k-linux-tdep.c
index 7543a35e611..ad4d75adb4d 100644
--- a/gdb/m68k-linux-tdep.c
+++ b/gdb/m68k-linux-tdep.c
@@ -408,7 +408,7 @@ m68k_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
/* GNU/Linux uses SVR4-style shared libraries. */
set_solib_svr4_fetch_link_map_offsets (gdbarch,
- svr4_ilp32_fetch_link_map_offsets);
+ linux_ilp32_fetch_link_map_offsets);
/* GNU/Linux uses the dynamic linker included in the GNU C Library. */
set_gdbarch_skip_solib_resolver (gdbarch, glibc_skip_solib_resolver);
diff --git a/gdb/microblaze-linux-tdep.c b/gdb/microblaze-linux-tdep.c
index 17cdc2516d4..e9ce7cd7fe0 100644
--- a/gdb/microblaze-linux-tdep.c
+++ b/gdb/microblaze-linux-tdep.c
@@ -124,7 +124,7 @@ microblaze_linux_init_abi (struct gdbarch_info info,
/* Shared library handling. */
set_solib_svr4_fetch_link_map_offsets (gdbarch,
- svr4_ilp32_fetch_link_map_offsets);
+ linux_ilp32_fetch_link_map_offsets);
/* Trampolines. */
tramp_frame_prepend_unwinder (gdbarch,
diff --git a/gdb/mips-linux-tdep.c b/gdb/mips-linux-tdep.c
index 1ceed5250fe..ce287f6a354 100644
--- a/gdb/mips-linux-tdep.c
+++ b/gdb/mips-linux-tdep.c
@@ -1542,7 +1542,7 @@ mips_linux_init_abi (struct gdbarch_info info,
set_gdbarch_get_longjmp_target (gdbarch,
mips_linux_get_longjmp_target);
set_solib_svr4_fetch_link_map_offsets
- (gdbarch, svr4_ilp32_fetch_link_map_offsets);
+ (gdbarch, linux_ilp32_fetch_link_map_offsets);
tramp_frame_prepend_unwinder (gdbarch, &micromips_linux_o32_sigframe);
tramp_frame_prepend_unwinder (gdbarch,
&micromips_linux_o32_rt_sigframe);
@@ -1554,7 +1554,7 @@ mips_linux_init_abi (struct gdbarch_info info,
set_gdbarch_get_longjmp_target (gdbarch,
mips_linux_get_longjmp_target);
set_solib_svr4_fetch_link_map_offsets
- (gdbarch, svr4_ilp32_fetch_link_map_offsets);
+ (gdbarch, linux_ilp32_fetch_link_map_offsets);
set_gdbarch_long_double_bit (gdbarch, 128);
/* These floatformats should probably be renamed. MIPS uses
the same 128-bit IEEE floating point format that IA-64 uses,
@@ -1570,7 +1570,7 @@ mips_linux_init_abi (struct gdbarch_info info,
set_gdbarch_get_longjmp_target (gdbarch,
mips64_linux_get_longjmp_target);
set_solib_svr4_fetch_link_map_offsets
- (gdbarch, svr4_lp64_fetch_link_map_offsets);
+ (gdbarch, linux_lp64_fetch_link_map_offsets);
set_gdbarch_long_double_bit (gdbarch, 128);
/* These floatformats should probably be renamed. MIPS uses
the same 128-bit IEEE floating point format that IA-64 uses,
diff --git a/gdb/mn10300-linux-tdep.c b/gdb/mn10300-linux-tdep.c
index 1a2e0493118..7c68d1116c5 100644
--- a/gdb/mn10300-linux-tdep.c
+++ b/gdb/mn10300-linux-tdep.c
@@ -709,7 +709,7 @@ am33_linux_init_osabi (struct gdbarch_info info, struct gdbarch *gdbarch)
set_gdbarch_iterate_over_regset_sections
(gdbarch, am33_iterate_over_regset_sections);
set_solib_svr4_fetch_link_map_offsets
- (gdbarch, svr4_ilp32_fetch_link_map_offsets);
+ (gdbarch, linux_ilp32_fetch_link_map_offsets);
tramp_frame_prepend_unwinder (gdbarch, &am33_linux_sigframe);
tramp_frame_prepend_unwinder (gdbarch, &am33_linux_rt_sigframe);
diff --git a/gdb/nios2-linux-tdep.c b/gdb/nios2-linux-tdep.c
index 661c8b38f72..bd86146c878 100644
--- a/gdb/nios2-linux-tdep.c
+++ b/gdb/nios2-linux-tdep.c
@@ -226,7 +226,7 @@ nios2_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
set_gdbarch_skip_solib_resolver (gdbarch, glibc_skip_solib_resolver);
set_solib_svr4_fetch_link_map_offsets (gdbarch,
- svr4_ilp32_fetch_link_map_offsets);
+ linux_ilp32_fetch_link_map_offsets);
/* Enable TLS support. */
set_gdbarch_fetch_tls_load_module_address (gdbarch,
svr4_fetch_objfile_link_map);
diff --git a/gdb/or1k-linux-tdep.c b/gdb/or1k-linux-tdep.c
index 1c3f8db7492..2ad55f0d9ec 100644
--- a/gdb/or1k-linux-tdep.c
+++ b/gdb/or1k-linux-tdep.c
@@ -143,7 +143,7 @@ or1k_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
linux_init_abi (info, gdbarch, 0);
set_solib_svr4_fetch_link_map_offsets (gdbarch,
- svr4_ilp32_fetch_link_map_offsets);
+ linux_ilp32_fetch_link_map_offsets);
/* GNU/Linux uses SVR4-style shared libraries. */
set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
diff --git a/gdb/ppc-linux-tdep.c b/gdb/ppc-linux-tdep.c
index 1e94922f25a..e62f45a35d8 100644
--- a/gdb/ppc-linux-tdep.c
+++ b/gdb/ppc-linux-tdep.c
@@ -2035,7 +2035,7 @@ ppc_linux_init_abi (struct gdbarch_info info,
/* Shared library handling. */
set_gdbarch_skip_trampoline_code (gdbarch, ppc_skip_trampoline_code);
set_solib_svr4_fetch_link_map_offsets
- (gdbarch, svr4_ilp32_fetch_link_map_offsets);
+ (gdbarch, linux_ilp32_fetch_link_map_offsets);
/* Setting the correct XML syscall filename. */
set_xml_syscall_file_name (gdbarch, XML_SYSCALL_FILENAME_PPC);
@@ -2087,7 +2087,7 @@ ppc_linux_init_abi (struct gdbarch_info info,
/* Shared library handling. */
set_gdbarch_skip_trampoline_code (gdbarch, ppc64_skip_trampoline_code);
set_solib_svr4_fetch_link_map_offsets
- (gdbarch, svr4_lp64_fetch_link_map_offsets);
+ (gdbarch, linux_lp64_fetch_link_map_offsets);
/* Setting the correct XML syscall filename. */
set_xml_syscall_file_name (gdbarch, XML_SYSCALL_FILENAME_PPC64);
diff --git a/gdb/riscv-linux-tdep.c b/gdb/riscv-linux-tdep.c
index 49dc75bb618..7351e1901d6 100644
--- a/gdb/riscv-linux-tdep.c
+++ b/gdb/riscv-linux-tdep.c
@@ -187,8 +187,8 @@ riscv_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
set_solib_svr4_fetch_link_map_offsets (gdbarch,
(riscv_isa_xlen (gdbarch) == 4
- ? svr4_ilp32_fetch_link_map_offsets
- : svr4_lp64_fetch_link_map_offsets));
+ ? linux_ilp32_fetch_link_map_offsets
+ : linux_lp64_fetch_link_map_offsets));
/* GNU/Linux uses SVR4-style shared libraries. */
set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
diff --git a/gdb/s390-linux-tdep.c b/gdb/s390-linux-tdep.c
index 1f40e10e3d3..04e3fc640d2 100644
--- a/gdb/s390-linux-tdep.c
+++ b/gdb/s390-linux-tdep.c
@@ -1158,7 +1158,7 @@ s390_linux_init_abi_31 (struct gdbarch_info info, struct gdbarch *gdbarch)
s390_linux_init_abi_any (info, gdbarch);
set_solib_svr4_fetch_link_map_offsets (gdbarch,
- svr4_ilp32_fetch_link_map_offsets);
+ linux_ilp32_fetch_link_map_offsets);
set_xml_syscall_file_name (gdbarch, XML_SYSCALL_FILENAME_S390);
}
@@ -1174,7 +1174,7 @@ s390_linux_init_abi_64 (struct gdbarch_info info, struct gdbarch *gdbarch)
s390_linux_init_abi_any (info, gdbarch);
set_solib_svr4_fetch_link_map_offsets (gdbarch,
- svr4_lp64_fetch_link_map_offsets);
+ linux_lp64_fetch_link_map_offsets);
set_xml_syscall_file_name (gdbarch, XML_SYSCALL_FILENAME_S390X);
}
diff --git a/gdb/sh-linux-tdep.c b/gdb/sh-linux-tdep.c
index 700df35bc3b..8315d46fddf 100644
--- a/gdb/sh-linux-tdep.c
+++ b/gdb/sh-linux-tdep.c
@@ -189,7 +189,7 @@ sh_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
/* GNU/Linux uses SVR4-style shared libraries. */
set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
set_solib_svr4_fetch_link_map_offsets
- (gdbarch, svr4_ilp32_fetch_link_map_offsets);
+ (gdbarch, linux_ilp32_fetch_link_map_offsets);
set_gdbarch_skip_solib_resolver (gdbarch, glibc_skip_solib_resolver);
set_gdbarch_fetch_tls_load_module_address (gdbarch,
diff --git a/gdb/sparc-linux-tdep.c b/gdb/sparc-linux-tdep.c
index 8d8efb49911..4ad77e24d82 100644
--- a/gdb/sparc-linux-tdep.c
+++ b/gdb/sparc-linux-tdep.c
@@ -436,7 +436,7 @@ sparc32_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
/* GNU/Linux has SVR4-style shared libraries... */
set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
set_solib_svr4_fetch_link_map_offsets
- (gdbarch, svr4_ilp32_fetch_link_map_offsets);
+ (gdbarch, linux_ilp32_fetch_link_map_offsets);
/* ...which means that we need some special handling when doing
prologue analysis. */
diff --git a/gdb/sparc64-linux-tdep.c b/gdb/sparc64-linux-tdep.c
index ea692ac00ef..e63fa87c69b 100644
--- a/gdb/sparc64-linux-tdep.c
+++ b/gdb/sparc64-linux-tdep.c
@@ -383,7 +383,7 @@ sparc64_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
/* GNU/Linux has SVR4-style shared libraries... */
set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
set_solib_svr4_fetch_link_map_offsets
- (gdbarch, svr4_lp64_fetch_link_map_offsets);
+ (gdbarch, linux_lp64_fetch_link_map_offsets);
/* ...which means that we need some special handling when doing
prologue analysis. */
diff --git a/gdb/tilegx-linux-tdep.c b/gdb/tilegx-linux-tdep.c
index 382e7f6d908..353497a3434 100644
--- a/gdb/tilegx-linux-tdep.c
+++ b/gdb/tilegx-linux-tdep.c
@@ -121,10 +121,10 @@ tilegx_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
/* GNU/Linux uses SVR4-style shared libraries. */
if (arch_size == 32)
set_solib_svr4_fetch_link_map_offsets (gdbarch,
- svr4_ilp32_fetch_link_map_offsets);
+ linux_ilp32_fetch_link_map_offsets);
else
set_solib_svr4_fetch_link_map_offsets (gdbarch,
- svr4_lp64_fetch_link_map_offsets);
+ linux_lp64_fetch_link_map_offsets);
/* Enable TLS support. */
set_gdbarch_fetch_tls_load_module_address (gdbarch,
diff --git a/gdb/xtensa-linux-tdep.c b/gdb/xtensa-linux-tdep.c
index 2eba9aaa21d..c9e2519b1e7 100644
--- a/gdb/xtensa-linux-tdep.c
+++ b/gdb/xtensa-linux-tdep.c
@@ -113,7 +113,7 @@ xtensa_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
linux_init_abi (info, gdbarch, 0);
set_solib_svr4_fetch_link_map_offsets
- (gdbarch, svr4_ilp32_fetch_link_map_offsets);
+ (gdbarch, linux_ilp32_fetch_link_map_offsets);
set_gdbarch_gdb_signal_from_target (gdbarch,
xtensa_linux_gdb_signal_from_target);
--
2.34.1
From 4eb629d50d449a079d3f5e22f26f45855939164f Mon Sep 17 00:00:00 2001
From: "H.J. Lu" <hjl.tools@gmail.com>
Date: Mon, 16 Aug 2021 08:18:18 -0700
Subject: [PATCH] gdbserver: Check r_version < 1 for Linux debugger interface
Update gdbserver to check r_version < 1 instead of r_version != 1 so
that r_version can be bumped for a new field in the glibc debugger
interface to support multiple namespaces. Since so far, the gdbserver
only reads fields defined for r_version == 1, it is compatible with
r_version >= 1.
All future glibc debugger interface changes will be backward compatible.
If there is ever the need for backward incompatible change to the glibc
debugger interface, a new DT_XXX element will be provided to access the
new incompatible interface.
Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=11839
---
gdbserver/linux-low.cc | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/gdbserver/linux-low.cc b/gdbserver/linux-low.cc
index 5c6191d941c..fc7a995351d 100644
--- a/gdbserver/linux-low.cc
+++ b/gdbserver/linux-low.cc
@@ -6845,7 +6845,7 @@ linux_process_target::qxfer_libraries_svr4 (const char *annex,
if (linux_read_memory (priv->r_debug + lmo->r_version_offset,
(unsigned char *) &r_version,
sizeof (r_version)) != 0
- || r_version != 1)
+ || r_version < 1)
{
warning ("unexpected r_debug version %d", r_version);
}
--
2.34.1
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