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Disable debuginfod in printer tests [BZ #28757]

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i386: Remove broken CAN_USE_REGISTER_ASM_EBP (bug 28771)
x86: use default cache size if it cannot be determined [BZ #28784]
This commit is contained in:
f00467700 2022-01-25 21:59:48 +08:00
parent cd30137cec
commit 6b774ad599
4 changed files with 590 additions and 1 deletions
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57
Disable-debuginfod-in-printer-tests-BZ-28757.patch Normal file
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@ -0,0 +1,57 @@
From 7de501f9418bf099e7104b63b0e4423257981b14 Mon Sep 17 00:00:00 2001
From: "H.J. Lu" <hjl.tools@gmail.com>
Date: Sun, 9 Jan 2022 09:06:15 -0800
Subject: [PATCH] Disable debuginfod in printer tests [BZ #28757]
With gdb-11.1-6.fc35.x86_64, I got
FAIL: nptl/test-cond-printers
FAIL: nptl/test-condattr-printers
FAIL: nptl/test-mutex-printers
FAIL: nptl/test-mutexattr-printers
FAIL: nptl/test-rwlock-printers
FAIL: nptl/test-rwlockattr-printers
$ cat nptl/test-condattr-printers.out
Error: Response does not match the expected pattern.
Command: start
Expected pattern: main
Response: Temporary breakpoint 1 at 0x11d5: file test-condattr-printers.c, line 43.
Starting program: /export/build/gnu/tools-build/glibc-cet-gitlab/build-x86_64-linux/nptl/test-condattr-printers
This GDB supports auto-downloading debuginfo from the following URLs:
https://debuginfod.fedoraproject.org/
Enable debuginfod for this session? (y or [n])
Disable debuginfod to avoid GDB messages. This fixes BZ #28757.
Reviewed-by: Florian Weimer <fweimer@redhat.com>
---
scripts/test_printers_common.py | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/scripts/test_printers_common.py b/scripts/test_printers_common.py
index 6406e3bac7..38121697bc 100644
--- a/scripts/test_printers_common.py
+++ b/scripts/test_printers_common.py
@@ -161,6 +161,17 @@ def init_test(test_bin, printer_files, printer_names):
printer files.
"""
+ # Disable debuginfod to avoid GDB messages like:
+ #
+ # This GDB supports auto-downloading debuginfo from the following URLs:
+ # https://debuginfod.fedoraproject.org/
+ # Enable debuginfod for this session? (y or [n])
+ #
+ try:
+ test('set debuginfod enabled off')
+ except Exception:
+ pass
+
# Load all the pretty printer files. We're assuming these are safe.
for printer_file in printer_files:
test('source {0}'.format(printer_file))
--
2.27.0

10
glibc.spec
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@ -66,7 +66,7 @@
##############################################################################
Name: glibc
Version: 2.34
Release: 46
Release: 47
Summary: The GNU libc libraries
License: %{all_license}
URL: http://www.gnu.org/software/glibc/
@ -171,6 +171,9 @@ Patch83: realpath-Set-errno-to-ENAMETOOLONG-for-result-larger.patch
Patch84: tst-realpath-toolong-Fix-hurd-build.patch
Patch85: getcwd-Set-errno-to-ERANGE-for-size-1-CVE-2021-3999.patch
Patch86: Linux-Detect-user-namespace-support-in-io-tst-getcwd.patch
Patch87: Disable-debuginfod-in-printer-tests-BZ-28757.patch
Patch88: i386-Remove-broken-CAN_USE_REGISTER_ASM_EBP-bug-2877.patch
Patch89: x86-use-default-cache-size-if-it-cannot-be-determine.patch
Patch9000: turn-default-value-of-x86_rep_stosb_threshold_form_2K_to_1M.patch
Patch9001: delete-no-hard-link-to-avoid-all_language-package-to.patch
@ -1374,6 +1377,11 @@ fi
%endif
%changelog
* Tue Jan 25 2022 Chuang Fang <fangchuangchuang@huawei.com> - 2.34-47
- Disable debuginfod in printer tests [BZ #28757]
- i386: Remove broken CAN_USE_REGISTER_ASM_EBP (bug 28771)
- x86: use default cache size if it cannot be determined [BZ #28784]
* Tue Jan 25 2022 Qingqing Li <liqingqing3@huawei.com> - 2.34-46
- fix CVE-2021-3998 and CVE-2021-3999

463
i386-Remove-broken-CAN_USE_REGISTER_ASM_EBP-bug-2877.patch Normal file
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@ -0,0 +1,463 @@
From 2fe2af88abd13ae5636881da2e26f461ecb7dfb5 Mon Sep 17 00:00:00 2001
From: Florian Weimer <fweimer@redhat.com>
Date: Thu, 13 Jan 2022 14:59:29 +0100
Subject: [PATCH] i386: Remove broken CAN_USE_REGISTER_ASM_EBP (bug 28771)
The configure check for CAN_USE_REGISTER_ASM_EBP tried to compile a
simple function that uses %ebp as an inline assembly operand. If
compilation failed, CAN_USE_REGISTER_ASM_EBP was set 0, which
eventually had these consequences:
(1) %ebx was avoided as an inline assembly operand, with an
assembler macro hack to avoid unnecessary register moves.
(2) %ebp was avoided as an inline assembly operand, using an
out-of-line syscall function for 6-argument system calls.
(1) is no longer needed for any GCC version that is supported for
building glibc. %ebx can be used directly as a register operand.
Therefore, this commit removes the %ebx avoidance completely. This
avoids the assembler macro hack, which turns out to be incompatible
with the current Systemtap probe macros (which switch to .altmacro
unconditionally).
(2) is still needed in many build configurations. The existing
configure check cannot really capture that because the simple function
succeeds to compile, while the full glibc build still fails.
Therefore, this commit removes the check, the CAN_USE_REGISTER_ASM_EBP
macro, and uses the out-of-line syscall function for 6-argument system
calls unconditionally.
Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
(cherry picked from commit a78e6a10d0b50d0ca80309775980fc99944b1727)
---
NEWS | 1 +
config.h.in | 4 -
sysdeps/unix/sysv/linux/i386/configure | 39 ----
sysdeps/unix/sysv/linux/i386/configure.ac | 17 --
sysdeps/unix/sysv/linux/i386/sysdep.h | 222 +++-------------------
5 files changed, 28 insertions(+), 255 deletions(-)
diff --git a/NEWS b/NEWS
index 5c253a4392..759a80b1b5 100644
--- a/NEWS
+++ b/NEWS
@@ -30,6 +30,7 @@ The following bugs are resolved with this release:
AMD64 cpus
[28091] network: ns_name_skip may return 0 for domain names without
terminator
+ [28771] %ebx optimization macros are incompatible with .altmacro
Version 2.33
diff --git a/config.h.in b/config.h.in
index 8b45a3a61d..37207df94f 100644
--- a/config.h.in
+++ b/config.h.in
@@ -283,10 +283,6 @@
/* Define if static PIE is enabled. */
#define ENABLE_STATIC_PIE 0
-/* Some compiler options may now allow to use ebp in __asm__ (used mainly
- in i386 6 argument syscall issue). */
-#define CAN_USE_REGISTER_ASM_EBP 0
-
/* The default value of x86 CET control. */
#define DEFAULT_DL_X86_CET_CONTROL cet_elf_property
diff --git a/sysdeps/unix/sysv/linux/i386/configure b/sysdeps/unix/sysv/linux/i386/configure
index 0327590486..f119e62fc3 100644
--- a/sysdeps/unix/sysv/linux/i386/configure
+++ b/sysdeps/unix/sysv/linux/i386/configure
@@ -1,44 +1,5 @@
# This file is generated from configure.ac by Autoconf. DO NOT EDIT!
# Local configure fragment for sysdeps/unix/sysv/linux/i386.
-# Check if CFLAGS allows compiler to use ebp register in inline assembly.
-
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if compiler flags allows ebp in inline assembly" >&5
-$as_echo_n "checking if compiler flags allows ebp in inline assembly... " >&6; }
-if ${libc_cv_can_use_register_asm_ebp+:} false; then :
- $as_echo_n "(cached) " >&6
-else
-
-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h. */
-
- void foo (int i)
- {
- register int reg asm ("ebp") = i;
- asm ("# %0" : : "r" (reg));
- }
-int
-main ()
-{
-
- ;
- return 0;
-}
-_ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
- libc_cv_can_use_register_asm_ebp=yes
-else
- libc_cv_can_use_register_asm_ebp=no
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_can_use_register_asm_ebp" >&5
-$as_echo "$libc_cv_can_use_register_asm_ebp" >&6; }
-if test $libc_cv_can_use_register_asm_ebp = yes; then
- $as_echo "#define CAN_USE_REGISTER_ASM_EBP 1" >>confdefs.h
-
-fi
-
libc_cv_gcc_unwind_find_fde=yes
ldd_rewrite_script=sysdeps/unix/sysv/linux/ldd-rewrite.sed
diff --git a/sysdeps/unix/sysv/linux/i386/configure.ac b/sysdeps/unix/sysv/linux/i386/configure.ac
index 9e980784bb..64ab2cc2c8 100644
--- a/sysdeps/unix/sysv/linux/i386/configure.ac
+++ b/sysdeps/unix/sysv/linux/i386/configure.ac
@@ -1,22 +1,5 @@
GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory.
# Local configure fragment for sysdeps/unix/sysv/linux/i386.
-# Check if CFLAGS allows compiler to use ebp register in inline assembly.
-AC_CACHE_CHECK([if compiler flags allows ebp in inline assembly],
- libc_cv_can_use_register_asm_ebp, [
-AC_COMPILE_IFELSE(
- [AC_LANG_PROGRAM([
- void foo (int i)
- {
- register int reg asm ("ebp") = i;
- asm ("# %0" : : "r" (reg));
- }])],
- [libc_cv_can_use_register_asm_ebp=yes],
- [libc_cv_can_use_register_asm_ebp=no])
-])
-if test $libc_cv_can_use_register_asm_ebp = yes; then
- AC_DEFINE(CAN_USE_REGISTER_ASM_EBP)
-fi
-
libc_cv_gcc_unwind_find_fde=yes
ldd_rewrite_script=sysdeps/unix/sysv/linux/ldd-rewrite.sed
diff --git a/sysdeps/unix/sysv/linux/i386/sysdep.h b/sysdeps/unix/sysv/linux/i386/sysdep.h
index 8a9911b7ac..39d6a3c134 100644
--- a/sysdeps/unix/sysv/linux/i386/sysdep.h
+++ b/sysdeps/unix/sysv/linux/i386/sysdep.h
@@ -43,15 +43,6 @@
# endif
#endif
-/* Since GCC 5 and above can properly spill %ebx with PIC when needed,
- we can inline syscalls with 6 arguments if GCC 5 or above is used
- to compile glibc. Disable GCC 5 optimization when compiling for
- profiling or when -fno-omit-frame-pointer is used since asm ("ebp")
- can't be used to put the 6th argument in %ebp for syscall. */
-#if !defined PROF && CAN_USE_REGISTER_ASM_EBP
-# define OPTIMIZE_FOR_GCC_5
-#endif
-
#ifdef __ASSEMBLER__
/* Linux uses a negative return value to indicate syscall errors,
@@ -239,36 +230,6 @@
extern int __syscall_error (int)
attribute_hidden __attribute__ ((__regparm__ (1)));
-#ifndef OPTIMIZE_FOR_GCC_5
-/* We need some help from the assembler to generate optimal code. We
- define some macros here which later will be used. */
-asm (".L__X'%ebx = 1\n\t"
- ".L__X'%ecx = 2\n\t"
- ".L__X'%edx = 2\n\t"
- ".L__X'%eax = 3\n\t"
- ".L__X'%esi = 3\n\t"
- ".L__X'%edi = 3\n\t"
- ".L__X'%ebp = 3\n\t"
- ".L__X'%esp = 3\n\t"
- ".macro bpushl name reg\n\t"
- ".if 1 - \\name\n\t"
- ".if 2 - \\name\n\t"
- "error\n\t"
- ".else\n\t"
- "xchgl \\reg, %ebx\n\t"
- ".endif\n\t"
- ".endif\n\t"
- ".endm\n\t"
- ".macro bpopl name reg\n\t"
- ".if 1 - \\name\n\t"
- ".if 2 - \\name\n\t"
- "error\n\t"
- ".else\n\t"
- "xchgl \\reg, %ebx\n\t"
- ".endif\n\t"
- ".endif\n\t"
- ".endm\n\t");
-
/* Six-argument syscalls use an out-of-line helper, because an inline
asm using all registers apart from %esp cannot work reliably and
the assembler does not support describing an asm that saves and
@@ -279,7 +240,6 @@ struct libc_do_syscall_args
{
int ebx, edi, ebp;
};
-#endif
# define VDSO_NAME "LINUX_2.6"
# define VDSO_HASH 61765110
@@ -332,14 +292,8 @@ struct libc_do_syscall_args
/* Each object using 6-argument inline syscalls must include a
definition of __libc_do_syscall. */
-#ifdef OPTIMIZE_FOR_GCC_5
-# define INTERNAL_SYSCALL_MAIN_6(name, args...) \
- INTERNAL_SYSCALL_MAIN_INLINE(name, 6, args)
-# define INTERNAL_SYSCALL_MAIN_NCS_6(name, args...) \
- INTERNAL_SYSCALL_MAIN_NCS(name, 6, args)
-#else /* GCC 5 */
-# define INTERNAL_SYSCALL_MAIN_6(name, arg1, arg2, arg3, \
- arg4, arg5, arg6) \
+#define INTERNAL_SYSCALL_MAIN_6(name, arg1, arg2, arg3, \
+ arg4, arg5, arg6) \
struct libc_do_syscall_args _xv = \
{ \
(int) (arg1), \
@@ -352,8 +306,8 @@ struct libc_do_syscall_args
: "=a" (resultvar) \
: "i" (__NR_##name), "c" (arg2), "d" (arg3), "S" (arg4), "D" (&_xv) \
: "memory", "cc")
-# define INTERNAL_SYSCALL_MAIN_NCS_6(name, arg1, arg2, arg3, \
- arg4, arg5, arg6) \
+#define INTERNAL_SYSCALL_MAIN_NCS_6(name, arg1, arg2, arg3, \
+ arg4, arg5, arg6) \
struct libc_do_syscall_args _xv = \
{ \
(int) (arg1), \
@@ -366,7 +320,6 @@ struct libc_do_syscall_args
: "=a" (resultvar) \
: "a" (name), "c" (arg2), "d" (arg3), "S" (arg4), "D" (&_xv) \
: "memory", "cc")
-#endif /* GCC 5 */
#define INTERNAL_SYSCALL(name, nr, args...) \
({ \
@@ -380,193 +333,72 @@ struct libc_do_syscall_args
(int) resultvar; })
#if I386_USE_SYSENTER
-# ifdef OPTIMIZE_FOR_GCC_5
-# ifdef PIC
-# define INTERNAL_SYSCALL_MAIN_INLINE(name, nr, args...) \
+# ifdef PIC
+# define INTERNAL_SYSCALL_MAIN_INLINE(name, nr, args...) \
LOADREGS_##nr(args) \
asm volatile ( \
"call *%%gs:%P2" \
: "=a" (resultvar) \
: "a" (__NR_##name), "i" (offsetof (tcbhead_t, sysinfo)) \
ASMARGS_##nr(args) : "memory", "cc")
-# define INTERNAL_SYSCALL_MAIN_NCS(name, nr, args...) \
+# define INTERNAL_SYSCALL_MAIN_NCS(name, nr, args...) \
LOADREGS_##nr(args) \
asm volatile ( \
"call *%%gs:%P2" \
: "=a" (resultvar) \
: "a" (name), "i" (offsetof (tcbhead_t, sysinfo)) \
ASMARGS_##nr(args) : "memory", "cc")
-# else
-# define INTERNAL_SYSCALL_MAIN_INLINE(name, nr, args...) \
+# else /* I386_USE_SYSENTER && !PIC */
+# define INTERNAL_SYSCALL_MAIN_INLINE(name, nr, args...) \
LOADREGS_##nr(args) \
asm volatile ( \
"call *_dl_sysinfo" \
: "=a" (resultvar) \
: "a" (__NR_##name) ASMARGS_##nr(args) : "memory", "cc")
-# define INTERNAL_SYSCALL_MAIN_NCS(name, nr, args...) \
+# define INTERNAL_SYSCALL_MAIN_NCS(name, nr, args...) \
LOADREGS_##nr(args) \
asm volatile ( \
"call *_dl_sysinfo" \
: "=a" (resultvar) \
: "a" (name) ASMARGS_##nr(args) : "memory", "cc")
-# endif
-# else /* GCC 5 */
-# ifdef PIC
-# define INTERNAL_SYSCALL_MAIN_INLINE(name, nr, args...) \
- EXTRAVAR_##nr \
- asm volatile ( \
- LOADARGS_##nr \
- "movl %1, %%eax\n\t" \
- "call *%%gs:%P2\n\t" \
- RESTOREARGS_##nr \
- : "=a" (resultvar) \
- : "i" (__NR_##name), "i" (offsetof (tcbhead_t, sysinfo)) \
- ASMFMT_##nr(args) : "memory", "cc")
-# define INTERNAL_SYSCALL_MAIN_NCS(name, nr, args...) \
- EXTRAVAR_##nr \
- asm volatile ( \
- LOADARGS_##nr \
- "call *%%gs:%P2\n\t" \
- RESTOREARGS_##nr \
- : "=a" (resultvar) \
- : "0" (name), "i" (offsetof (tcbhead_t, sysinfo)) \
- ASMFMT_##nr(args) : "memory", "cc")
-# else
-# define INTERNAL_SYSCALL_MAIN_INLINE(name, nr, args...) \
- EXTRAVAR_##nr \
- asm volatile ( \
- LOADARGS_##nr \
- "movl %1, %%eax\n\t" \
- "call *_dl_sysinfo\n\t" \
- RESTOREARGS_##nr \
- : "=a" (resultvar) \
- : "i" (__NR_##name) ASMFMT_##nr(args) : "memory", "cc")
-# define INTERNAL_SYSCALL_MAIN_NCS(name, nr, args...) \
- EXTRAVAR_##nr \
- asm volatile ( \
- LOADARGS_##nr \
- "call *_dl_sysinfo\n\t" \
- RESTOREARGS_##nr \
- : "=a" (resultvar) \
- : "0" (name) ASMFMT_##nr(args) : "memory", "cc")
-# endif
-# endif /* GCC 5 */
-#else
-# ifdef OPTIMIZE_FOR_GCC_5
-# define INTERNAL_SYSCALL_MAIN_INLINE(name, nr, args...) \
+# endif /* I386_USE_SYSENTER && !PIC */
+#else /* !I386_USE_SYSENTER */
+# define INTERNAL_SYSCALL_MAIN_INLINE(name, nr, args...) \
LOADREGS_##nr(args) \
asm volatile ( \
"int $0x80" \
: "=a" (resultvar) \
: "a" (__NR_##name) ASMARGS_##nr(args) : "memory", "cc")
-# define INTERNAL_SYSCALL_MAIN_NCS(name, nr, args...) \
+# define INTERNAL_SYSCALL_MAIN_NCS(name, nr, args...) \
LOADREGS_##nr(args) \
asm volatile ( \
"int $0x80" \
: "=a" (resultvar) \
: "a" (name) ASMARGS_##nr(args) : "memory", "cc")
-# else /* GCC 5 */
-# define INTERNAL_SYSCALL_MAIN_INLINE(name, nr, args...) \
- EXTRAVAR_##nr \
- asm volatile ( \
- LOADARGS_##nr \
- "movl %1, %%eax\n\t" \
- "int $0x80\n\t" \
- RESTOREARGS_##nr \
- : "=a" (resultvar) \
- : "i" (__NR_##name) ASMFMT_##nr(args) : "memory", "cc")
-# define INTERNAL_SYSCALL_MAIN_NCS(name, nr, args...) \
- EXTRAVAR_##nr \
- asm volatile ( \
- LOADARGS_##nr \
- "int $0x80\n\t" \
- RESTOREARGS_##nr \
- : "=a" (resultvar) \
- : "0" (name) ASMFMT_##nr(args) : "memory", "cc")
-# endif /* GCC 5 */
-#endif
-
-#define LOADARGS_0
-#ifdef __PIC__
-# if I386_USE_SYSENTER && defined PIC
-# define LOADARGS_1 \
- "bpushl .L__X'%k3, %k3\n\t"
-# define LOADARGS_5 \
- "movl %%ebx, %4\n\t" \
- "movl %3, %%ebx\n\t"
-# else
-# define LOADARGS_1 \
- "bpushl .L__X'%k2, %k2\n\t"
-# define LOADARGS_5 \
- "movl %%ebx, %3\n\t" \
- "movl %2, %%ebx\n\t"
-# endif
-# define LOADARGS_2 LOADARGS_1
-# define LOADARGS_3 \
- "xchgl %%ebx, %%edi\n\t"
-# define LOADARGS_4 LOADARGS_3
-#else
-# define LOADARGS_1
-# define LOADARGS_2
-# define LOADARGS_3
-# define LOADARGS_4
-# define LOADARGS_5
-#endif
-
-#define RESTOREARGS_0
-#ifdef __PIC__
-# if I386_USE_SYSENTER && defined PIC
-# define RESTOREARGS_1 \
- "bpopl .L__X'%k3, %k3\n\t"
-# define RESTOREARGS_5 \
- "movl %4, %%ebx"
-# else
-# define RESTOREARGS_1 \
- "bpopl .L__X'%k2, %k2\n\t"
-# define RESTOREARGS_5 \
- "movl %3, %%ebx"
-# endif
-# define RESTOREARGS_2 RESTOREARGS_1
-# define RESTOREARGS_3 \
- "xchgl %%edi, %%ebx\n\t"
-# define RESTOREARGS_4 RESTOREARGS_3
-#else
-# define RESTOREARGS_1
-# define RESTOREARGS_2
-# define RESTOREARGS_3
-# define RESTOREARGS_4
-# define RESTOREARGS_5
-#endif
+#endif /* !I386_USE_SYSENTER */
-#ifdef OPTIMIZE_FOR_GCC_5
-# define LOADREGS_0()
-# define ASMARGS_0()
-# define LOADREGS_1(arg1) \
+#define LOADREGS_0()
+#define ASMARGS_0()
+#define LOADREGS_1(arg1) \
LOADREGS_0 ()
-# define ASMARGS_1(arg1) \
+#define ASMARGS_1(arg1) \
ASMARGS_0 (), "b" ((unsigned int) (arg1))
-# define LOADREGS_2(arg1, arg2) \
+#define LOADREGS_2(arg1, arg2) \
LOADREGS_1 (arg1)
-# define ASMARGS_2(arg1, arg2) \
+#define ASMARGS_2(arg1, arg2) \
ASMARGS_1 (arg1), "c" ((unsigned int) (arg2))
-# define LOADREGS_3(arg1, arg2, arg3) \
+#define LOADREGS_3(arg1, arg2, arg3) \
LOADREGS_2 (arg1, arg2)
-# define ASMARGS_3(arg1, arg2, arg3) \
+#define ASMARGS_3(arg1, arg2, arg3) \
ASMARGS_2 (arg1, arg2), "d" ((unsigned int) (arg3))
-# define LOADREGS_4(arg1, arg2, arg3, arg4) \
+#define LOADREGS_4(arg1, arg2, arg3, arg4) \
LOADREGS_3 (arg1, arg2, arg3)
-# define ASMARGS_4(arg1, arg2, arg3, arg4) \
+#define ASMARGS_4(arg1, arg2, arg3, arg4) \
ASMARGS_3 (arg1, arg2, arg3), "S" ((unsigned int) (arg4))
-# define LOADREGS_5(arg1, arg2, arg3, arg4, arg5) \
+#define LOADREGS_5(arg1, arg2, arg3, arg4, arg5) \
LOADREGS_4 (arg1, arg2, arg3, arg4)
-# define ASMARGS_5(arg1, arg2, arg3, arg4, arg5) \
+#define ASMARGS_5(arg1, arg2, arg3, arg4, arg5) \
ASMARGS_4 (arg1, arg2, arg3, arg4), "D" ((unsigned int) (arg5))
-# define LOADREGS_6(arg1, arg2, arg3, arg4, arg5, arg6) \
- register unsigned int _a6 asm ("ebp") = (unsigned int) (arg6); \
- LOADREGS_5 (arg1, arg2, arg3, arg4, arg5)
-# define ASMARGS_6(arg1, arg2, arg3, arg4, arg5, arg6) \
- ASMARGS_5 (arg1, arg2, arg3, arg4, arg5), "r" (_a6)
-#endif /* GCC 5 */
#define ASMFMT_0()
#ifdef __PIC__
--
2.27.0

61
x86-use-default-cache-size-if-it-cannot-be-determine.patch Normal file
View File

@ -0,0 +1,61 @@
From c242fcce06e3102ca663b2f992611d0bda4f2668 Mon Sep 17 00:00:00 2001
From: Aurelien Jarno <aurelien@aurel32.net>
Date: Mon, 17 Jan 2022 19:41:40 +0100
Subject: [PATCH] x86: use default cache size if it cannot be determined [BZ
#28784]
In some cases (e.g QEMU, non-Intel/AMD CPU) the cache information can
not be retrieved and the corresponding values are set to 0.
Commit 2d651eb9265d ("x86: Move x86 processor cache info to
cpu_features") changed the behaviour in such case by defining the
__x86_shared_cache_size and __x86_data_cache_size variables to 0 instead
of using the default values. This cause an issue with the i686 SSE2
optimized bzero/routine which assumes that the cache size is at least
128 bytes, and otherwise tries to zero/set the whole address space minus
128 bytes.
Fix that by restoring the original code to only update
__x86_shared_cache_size and __x86_data_cache_size variables if the
corresponding cache sizes are not zero.
Fixes bug 28784
Fixes commit 2d651eb9265d
Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
---
sysdeps/x86/cacheinfo.h | 14 ++++++++++----
1 file changed, 10 insertions(+), 4 deletions(-)
diff --git a/sysdeps/x86/cacheinfo.h b/sysdeps/x86/cacheinfo.h
index 4f91a1e98d..65132a9d19 100644
--- a/sysdeps/x86/cacheinfo.h
+++ b/sysdeps/x86/cacheinfo.h
@@ -61,14 +61,20 @@ init_cacheinfo (void)
long int data = cpu_features->data_cache_size;
/* Round data cache size to multiple of 256 bytes. */
data = data & ~255L;
- __x86_data_cache_size_half = data / 2;
- __x86_data_cache_size = data;
+ if (data > 0)
+ {
+ __x86_data_cache_size_half = data / 2;
+ __x86_data_cache_size = data;
+ }
long int shared = cpu_features->shared_cache_size;
/* Round shared cache size to multiple of 256 bytes. */
shared = shared & ~255L;
- __x86_shared_cache_size_half = shared / 2;
- __x86_shared_cache_size = shared;
+ if (shared > 0)
+ {
+ __x86_shared_cache_size_half = shared / 2;
+ __x86_shared_cache_size = shared;
+ }
__x86_shared_non_temporal_threshold
= cpu_features->non_temporal_threshold;
--
2.27.0