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authorIgnacy Gawędzki <ignacy.gawedzki@green-communications.fr>2016-10-06 20:15:58 +0200
committerWaldemar Brodkorb <wbx@openadk.org>2016-11-29 08:39:15 +0100
commit43a336e63f16c639e0e6fefdd7404509159c07b1 (patch)
tree926cd30d04e72d76ed3b0d23084a71eeb9c13fac /libpthread/nptl/sysdeps/unix/sysv
parentb433e2d9fccb17f9a2807403c339a7004e3d4f1b (diff)
libpthread: Fix inclusion of unwind code.
Since librt and libpthread are now integrated into libc, including unwind-resume and unwind-forcedunwind implementations of unwind code makes no sense. Only unwind-forcedunwind is now included with functions hidden to avoid them overriding the ones from libgcc_s. * libpthread/nptl/sysdeps/generic/unwind-resume.h: New. Define generic PERSONALITY_PROTO and PERSONALITY_ARGS and set HAVE_ARCH_UNWIND_RESUME to 0. * libpthread/nptl/sysdeps/pthread/unwind-resume.c: Move... * libpthread/nptl/sysdeps/generic/unwind-resume.c: ... here. Include generic implementation of _Unwind_Resume on the condition that !HAVE_ARCH_UNWIND_RESUME. Make functions hidden to prevent them from overriding libgcc_s's ones. * libpthread/nptl/sysdeps/pthread/unwind-forcedunwind.c: Likewise. * libpthread/nptl/sysdeps/arm/unwind-resume.h: New. Define ARM-specific PERSONALITY_PROTO and PERSONALITY_ARGS and set HAVE_ARCH_UNWIND_RESUME to 1. * libpthread/nptl/sysdeps/arm/arm-unwind-resume.c, * libpthread/nptl/sysdeps/arm/pt-arm-unwind-resume.c, * libpthread/nptl/sysdeps/arm/rt-arm-unwind-resume.c: New. ARM-specific implementations of _Unwind_Resume resp. for libc, libpthread and librt. * libpthread/nptl/sysdeps/Makefile.commonarch: Remove both arm-unwind-resume and rt-arm-unwind-resume from libpthread_arch_CSRC. * libpthread/nptl/sysdeps/unix/sysv/linux/arm/unwind-forcedunwind.c, * libpthread/nptl/sysdeps/unix/sysv/linux/arm/unwind-resume.c: Remove. Signed-off-by: Ignacy Gawędzki <ignacy.gawedzki@green-communications.fr>
Diffstat (limited to 'libpthread/nptl/sysdeps/unix/sysv')
-rw-r--r--libpthread/nptl/sysdeps/unix/sysv/linux/arm/unwind-forcedunwind.c177
-rw-r--r--libpthread/nptl/sysdeps/unix/sysv/linux/arm/unwind-resume.c116
2 files changed, 0 insertions, 293 deletions
diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/arm/unwind-forcedunwind.c b/libpthread/nptl/sysdeps/unix/sysv/linux/arm/unwind-forcedunwind.c
deleted file mode 100644
index a6a0515ff..000000000
--- a/libpthread/nptl/sysdeps/unix/sysv/linux/arm/unwind-forcedunwind.c
+++ /dev/null
@@ -1,177 +0,0 @@
-/* Copyright (C) 2003, 2005, 2007, 2009, 2010 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
- Contributed by Jakub Jelinek <jakub@redhat.com>.
-
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public License as
- published by the Free Software Foundation; either version 2.1 of the
- License, or (at your option) any later version.
-
- The GNU C Library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; see the file COPYING.LIB. If
- not, see <http://www.gnu.org/licenses/>. */
-
-#include <dlfcn.h>
-#include <stdio.h>
-#include <unwind.h>
-#include <pthreadP.h>
-
-#define __libc_dlopen(x) dlopen(x, (RTLD_LOCAL | RTLD_LAZY))
-#define __libc_dlsym dlsym
-#define __libc_dlclose dlclose
-#define __libc_fatal(x) {/*write(STDERR_FILENO, x, strlen(x));*/ abort();}
-
-static void *libgcc_s_handle;
-static void (*libgcc_s_resume) (struct _Unwind_Exception *exc)
- __attribute_used__;
-static _Unwind_Reason_Code (*libgcc_s_personality)
- (_Unwind_State, struct _Unwind_Exception *, struct _Unwind_Context *);
-static _Unwind_Reason_Code (*libgcc_s_forcedunwind)
- (struct _Unwind_Exception *, _Unwind_Stop_Fn, void *);
-static _Unwind_Word (*libgcc_s_getcfa) (struct _Unwind_Context *);
-
-void
-__attribute_noinline__
-pthread_cancel_init (void)
-{
- void *resume, *personality, *forcedunwind, *getcfa;
- void *handle;
-
- if (__builtin_expect (libgcc_s_handle != NULL, 1))
- {
- /* Force gcc to reload all values. */
- __asm__ __volatile__ ("" ::: "memory");
- return;
- }
-
- handle = __libc_dlopen ("libgcc_s.so.1");
-
- if (handle == NULL
- || (resume = __libc_dlsym (handle, "_Unwind_Resume")) == NULL
- || (personality = __libc_dlsym (handle, "__gcc_personality_v0")) == NULL
- || (forcedunwind = __libc_dlsym (handle, "_Unwind_ForcedUnwind"))
- == NULL
- || (getcfa = __libc_dlsym (handle, "_Unwind_GetCFA")) == NULL
-#ifdef ARCH_CANCEL_INIT
- || ARCH_CANCEL_INIT (handle)
-#endif
- )
- __libc_fatal ("libgcc_s.so.1 must be installed for pthread_cancel to work\n");
-
- libgcc_s_resume = resume;
- libgcc_s_personality = personality;
- libgcc_s_forcedunwind = forcedunwind;
- libgcc_s_getcfa = getcfa;
- /* Make sure libgcc_s_getcfa is written last. Otherwise,
- pthread_cancel_init might return early even when the pointer the
- caller is interested in is not initialized yet. */
- atomic_write_barrier ();
- libgcc_s_handle = handle;
-}
-
-void
-__libc_freeres_fn_section
-__unwind_freeres (void)
-{
- void *handle = libgcc_s_handle;
- if (handle != NULL)
- {
- libgcc_s_handle = NULL;
- __libc_dlclose (handle);
- }
-}
-
-#ifdef __thumb__
-void
-_Unwind_Resume (struct _Unwind_Exception *exc)
-{
- if (__builtin_expect (libgcc_s_resume == NULL, 0))
- pthread_cancel_init ();
-
- libgcc_s_resume (exc);
-}
-
-#else
-/* It's vitally important that _Unwind_Resume not have a stack frame; the
- ARM unwinder relies on register state at entrance. So we write this in
- assembly. */
-
-__asm__ (
-" .globl _Unwind_Resume\n"
-" .type _Unwind_Resume, %function\n"
-"_Unwind_Resume:\n"
-" .cfi_sections .debug_frame\n"
-" " CFI_STARTPROC "\n"
-" stmfd sp!, {r4, r5, r6, lr}\n"
-" " CFI_ADJUST_CFA_OFFSET (16)" \n"
-" " CFI_REL_OFFSET (r4, 0) "\n"
-" " CFI_REL_OFFSET (r5, 4) "\n"
-" " CFI_REL_OFFSET (r6, 8) "\n"
-" " CFI_REL_OFFSET (lr, 12) "\n"
-" " CFI_REMEMBER_STATE "\n"
-" ldr r4, 1f\n"
-" ldr r5, 2f\n"
-"3: add r4, pc, r4\n"
-" ldr r3, [r4, r5]\n"
-" mov r6, r0\n"
-" cmp r3, #0\n"
-" beq 4f\n"
-"5: mov r0, r6\n"
-" ldmfd sp!, {r4, r5, r6, lr}\n"
-" " CFI_ADJUST_CFA_OFFSET (-16) "\n"
-" " CFI_RESTORE (r4) "\n"
-" " CFI_RESTORE (r5) "\n"
-" " CFI_RESTORE (r6) "\n"
-" " CFI_RESTORE (lr) "\n"
-" bx r3\n"
-" " CFI_RESTORE_STATE "\n"
-"4: bl pthread_cancel_init\n"
-" ldr r3, [r4, r5]\n"
-" b 5b\n"
-" " CFI_ENDPROC "\n"
-" .align 2\n"
-#ifdef __thumb2__
-"1: .word _GLOBAL_OFFSET_TABLE_ - 3b - 4\n"
-#else
-"1: .word _GLOBAL_OFFSET_TABLE_ - 3b - 8\n"
-#endif
-"2: .word libgcc_s_resume(GOTOFF)\n"
-" .size _Unwind_Resume, .-_Unwind_Resume\n"
-);
-
-#endif
-
-_Unwind_Reason_Code
-__gcc_personality_v0 (_Unwind_State state,
- struct _Unwind_Exception *ue_header,
- struct _Unwind_Context *context)
-{
- if (__builtin_expect (libgcc_s_personality == NULL, 0))
- pthread_cancel_init ();
-
- return libgcc_s_personality (state, ue_header, context);
-}
-
-_Unwind_Reason_Code
-_Unwind_ForcedUnwind (struct _Unwind_Exception *exc, _Unwind_Stop_Fn stop,
- void *stop_argument)
-{
- if (__builtin_expect (libgcc_s_forcedunwind == NULL, 0))
- pthread_cancel_init ();
-
- return libgcc_s_forcedunwind (exc, stop, stop_argument);
-}
-
-_Unwind_Word
-_Unwind_GetCFA (struct _Unwind_Context *context)
-{
- if (__builtin_expect (libgcc_s_getcfa == NULL, 0))
- pthread_cancel_init ();
-
- return libgcc_s_getcfa (context);
-}
diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/arm/unwind-resume.c b/libpthread/nptl/sysdeps/unix/sysv/linux/arm/unwind-resume.c
deleted file mode 100644
index e2e2e0be3..000000000
--- a/libpthread/nptl/sysdeps/unix/sysv/linux/arm/unwind-resume.c
+++ /dev/null
@@ -1,116 +0,0 @@
-/* Copyright (C) 2003, 2005, 2010 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
- Contributed by Jakub Jelinek <jakub@redhat.com>.
-
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public License as
- published by the Free Software Foundation; either version 2.1 of the
- License, or (at your option) any later version.
-
- The GNU C Library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; see the file COPYING.LIB. If
- not, see <http://www.gnu.org/licenses/>. */
-
-#include <dlfcn.h>
-#include <stdio.h>
-#include <unwind.h>
-
-#define __libc_dlopen(x) dlopen(x, (RTLD_LOCAL | RTLD_LAZY))
-#define __libc_dlsym dlsym
-#define __libc_dlclose dlclose
-#define __libc_fatal(x) {/*write(STDERR_FILENO, x, strlen(x));*/ abort();}
-
-static void (*libgcc_s_resume) (struct _Unwind_Exception *exc)
- __attribute_used__;
-static _Unwind_Reason_Code (*libgcc_s_personality)
- (_Unwind_State, struct _Unwind_Exception *, struct _Unwind_Context *);
-
-static void init (void) __attribute_used__;
-
-static void
-init (void)
-{
- void *resume, *personality;
- void *handle;
-
- handle = __libc_dlopen ("libgcc_s.so.1");
-
- if (handle == NULL
- || (resume = __libc_dlsym (handle, "_Unwind_Resume")) == NULL
- || (personality = __libc_dlsym (handle, "__gcc_personality_v0")) == NULL)
- __libc_fatal ("libgcc_s.so.1 must be installed for pthread_cancel to work\n");
-
- libgcc_s_resume = resume;
- libgcc_s_personality = personality;
-}
-#ifdef __thumb__
-void
-_Unwind_Resume (struct _Unwind_Exception *exc)
-{
- if (__builtin_expect (libgcc_s_resume == NULL, 0))
- init ();
- libgcc_s_resume (exc);
-}
-#else
-/* It's vitally important that _Unwind_Resume not have a stack frame; the
- ARM unwinder relies on register state at entrance. So we write this in
- assembly. */
-
-__asm__ (
-" .globl _Unwind_Resume\n"
-" .type _Unwind_Resume, %function\n"
-"_Unwind_Resume:\n"
-" " CFI_SECTIONS (.debug_frame) "\n"
-" " CFI_STARTPROC "\n"
-" stmfd sp!, {r4, r5, r6, lr}\n"
-" " CFI_ADJUST_CFA_OFFSET (16)" \n"
-" " CFI_REL_OFFSET (r4, 0) "\n"
-" " CFI_REL_OFFSET (r5, 4) "\n"
-" " CFI_REL_OFFSET (r6, 8) "\n"
-" " CFI_REL_OFFSET (lr, 12) "\n"
-" " CFI_REMEMBER_STATE "\n"
-" ldr r4, 1f\n"
-" ldr r5, 2f\n"
-"3: add r4, pc, r4\n"
-" ldr r3, [r4, r5]\n"
-" mov r6, r0\n"
-" cmp r3, #0\n"
-" beq 4f\n"
-"5: mov r0, r6\n"
-" ldmfd sp!, {r4, r5, r6, lr}\n"
-" " CFI_ADJUST_CFA_OFFSET (-16) "\n"
-" " CFI_RESTORE (r4) "\n"
-" " CFI_RESTORE (r5) "\n"
-" " CFI_RESTORE (r6) "\n"
-" " CFI_RESTORE (lr) "\n"
-" bx r3\n"
-" " CFI_RESTORE_STATE "\n"
-"4: bl init\n"
-" ldr r3, [r4, r5]\n"
-" b 5b\n"
-" " CFI_ENDPROC "\n"
-" .align 2\n"
-#ifdef __thumb2__
-"1: .word _GLOBAL_OFFSET_TABLE_ - 3b - 4\n"
-#else
-"1: .word _GLOBAL_OFFSET_TABLE_ - 3b - 8\n"
-#endif
-"2: .word libgcc_s_resume(GOTOFF)\n"
-" .size _Unwind_Resume, .-_Unwind_Resume\n"
-);
-#endif
-
-_Unwind_Reason_Code
-__gcc_personality_v0 (_Unwind_State state,
- struct _Unwind_Exception *ue_header,
- struct _Unwind_Context *context)
-{
- if (__builtin_expect (libgcc_s_personality == NULL, 0))
- init ();
- return libgcc_s_personality (state, ue_header, context);
-}