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| author | Ulrich Drepper <drepper@redhat.com> | 2002-10-14 17:26:14 +0000 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 2002-10-14 17:26:14 +0000 |
| commit | 5e3ab761da1f32e0b1ec303a431be7d1be8a0250 (patch) | |
| tree | 66786272f6b46c63f9b0d8aa730f4d192e06d5b8 | |
| parent | 4083e0ec2599c6d0725d7717a0621b9ab2ce276f (diff) | |
| download | glibc-5e3ab761da1f32e0b1ec303a431be7d1be8a0250.tar glibc-5e3ab761da1f32e0b1ec303a431be7d1be8a0250.tar.gz glibc-5e3ab761da1f32e0b1ec303a431be7d1be8a0250.tar.bz2 glibc-5e3ab761da1f32e0b1ec303a431be7d1be8a0250.zip | |
(profil_counter): Add hack to prevent the compiler from clobbering the signal context.
| -rw-r--r-- | sysdeps/unix/sysv/linux/arm/profil-counter.h | 7 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/sh/profil-counter.h | 7 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/x86_64/profil-counter.h | 7 |
3 files changed, 18 insertions, 3 deletions
diff --git a/sysdeps/unix/sysv/linux/arm/profil-counter.h b/sysdeps/unix/sysv/linux/arm/profil-counter.h index 5d8be9dba6..7639883f10 100644 --- a/sysdeps/unix/sysv/linux/arm/profil-counter.h +++ b/sysdeps/unix/sysv/linux/arm/profil-counter.h @@ -1,5 +1,5 @@ /* Low-level statistical profiling support function. Linux/ARM version. - Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc. + Copyright (C) 1996, 1997, 1998, 2002 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -29,4 +29,9 @@ profil_counter (int signo, int _a2, int _a3, int _a4, union k_sigcontext sc) else pc = (void *) sc.v21.arm_pc; profil_count (pc); + + /* This is a hack to prevent the compiler from implementing the + above function call as a sibcall. The sibcall would overwrite + the signal context. */ + asm volatile (""); } diff --git a/sysdeps/unix/sysv/linux/sh/profil-counter.h b/sysdeps/unix/sysv/linux/sh/profil-counter.h index fe1df15add..ae1b97828c 100644 --- a/sysdeps/unix/sysv/linux/sh/profil-counter.h +++ b/sysdeps/unix/sysv/linux/sh/profil-counter.h @@ -1,5 +1,5 @@ /* Low-level statistical profiling support function. Linux/SH version. - Copyright (C) 1996, 1997, 1998, 2000 Free Software Foundation, Inc. + Copyright (C) 1996, 1997, 1998, 2000, 2002 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -25,4 +25,9 @@ profil_counter (int signo, int _a2, int _a3, int _a4, struct sigcontext sc) void *pc; pc = (void *) sc.sc_pc; profil_count (pc); + + /* This is a hack to prevent the compiler from implementing the + above function call as a sibcall. The sibcall would overwrite + the signal context. */ + asm volatile (""); } diff --git a/sysdeps/unix/sysv/linux/x86_64/profil-counter.h b/sysdeps/unix/sysv/linux/x86_64/profil-counter.h index 41b99e0a88..0b244175a8 100644 --- a/sysdeps/unix/sysv/linux/x86_64/profil-counter.h +++ b/sysdeps/unix/sysv/linux/x86_64/profil-counter.h @@ -1,5 +1,5 @@ /* Low-level statistical profiling support function. Linux/x86-64 version. - Copyright (C) 2001 Free Software Foundation, Inc. + Copyright (C) 2001, 2002 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -24,4 +24,9 @@ static void profil_counter (int signo, SIGCONTEXT scp) { profil_count ((void *) GET_PC (scp)); + + /* This is a hack to prevent the compiler from implementing the + above function call as a sibcall. The sibcall would overwrite + the signal context. */ + asm volatile (""); } |