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-rw-r--r--libpthread/nptl/sysdeps/unix/sysv/linux/arm/unwind-forcedunwind.c108
-rw-r--r--libpthread/nptl/sysdeps/unix/sysv/linux/arm/unwind-resume.c102
2 files changed, 116 insertions, 94 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
index d095d3083..011746d0e 100644
--- a/libpthread/nptl/sysdeps/unix/sysv/linux/arm/unwind-forcedunwind.c
+++ b/libpthread/nptl/sysdeps/unix/sysv/linux/arm/unwind-forcedunwind.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 2003, 2009 Free Software Foundation, Inc.
+/* 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>.
@@ -21,20 +21,14 @@
#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
static void *libgcc_s_handle;
static void (*libgcc_s_resume) (struct _Unwind_Exception *exc);
static _Unwind_Reason_Code (*libgcc_s_personality)
- (int, _Unwind_Action, _Unwind_Exception_Class, struct _Unwind_Exception *,
- struct _Unwind_Context *);
+ (_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 *);
-static void (*libgcc_s_sjlj_register) (struct SjLj_Function_Context *);
-static void (*libgcc_s_sjlj_unregister) (struct SjLj_Function_Context *);
void
__attribute_noinline__
@@ -42,7 +36,6 @@ pthread_cancel_init (void)
{
void *resume, *personality, *forcedunwind, *getcfa;
void *handle;
- void *sjlj_register, *sjlj_unregister;
if (__builtin_expect (libgcc_s_handle != NULL, 1))
{
@@ -54,21 +47,20 @@ pthread_cancel_init (void)
handle = __libc_dlopen ("libgcc_s.so.1");
if (handle == NULL
- || (sjlj_register = __libc_dlsym (handle, "_Unwind_SjLj_Register")) == NULL
- || (sjlj_unregister = __libc_dlsym (handle, "_Unwind_SjLj_Unregister")) == NULL
- || (resume = __libc_dlsym (handle, "_Unwind_SjLj_Resume")) == NULL
- || (personality = __libc_dlsym (handle, "__gcc_personality_sj0")) == NULL
- || (forcedunwind = __libc_dlsym (handle, "_Unwind_SjLj_ForcedUnwind"))
+ || (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
)
- fprintf(stderr, "libgcc_s.so.1 must be installed for pthread_cancel to work\n");
+ __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_sjlj_register = sjlj_register;
- libgcc_s_sjlj_unregister = sjlj_unregister;
libgcc_s_getcfa = getcfa;
/* Make sure libgcc_s_getcfa is written last. Otherwise,
pthread_cancel_init might return early even when the pointer the
@@ -89,26 +81,62 @@ __unwind_freeres (void)
}
}
-void
-_Unwind_Resume (struct _Unwind_Exception *exc)
-{
- if (__builtin_expect (libgcc_s_resume == NULL, 0))
- pthread_cancel_init ();
-
- libgcc_s_resume (exc);
-}
+/* 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"
+);
_Unwind_Reason_Code
-__gcc_personality_v0 (int version, _Unwind_Action actions,
- _Unwind_Exception_Class exception_class,
- struct _Unwind_Exception *ue_header,
- struct _Unwind_Context *context)
+__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 (version, actions, exception_class,
- ue_header, context);
+ return libgcc_s_personality (state, ue_header, context);
}
_Unwind_Reason_Code
@@ -129,21 +157,3 @@ _Unwind_GetCFA (struct _Unwind_Context *context)
return libgcc_s_getcfa (context);
}
-
-void
-_Unwind_SjLj_Register (struct SjLj_Function_Context *fc)
-{
- if (__builtin_expect (libgcc_s_sjlj_register == NULL, 0))
- pthread_cancel_init ();
-
- libgcc_s_sjlj_register (fc);
-}
-
-void
-_Unwind_SjLj_Unregister (struct SjLj_Function_Context *fc)
-{
- if (__builtin_expect (libgcc_s_sjlj_unregister == NULL, 0))
- pthread_cancel_init ();
-
- libgcc_s_sjlj_unregister (fc);
-}
diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/arm/unwind-resume.c b/libpthread/nptl/sysdeps/unix/sysv/linux/arm/unwind-resume.c
index bf0348ac2..cdab10e30 100644
--- a/libpthread/nptl/sysdeps/unix/sysv/linux/arm/unwind-resume.c
+++ b/libpthread/nptl/sysdeps/unix/sysv/linux/arm/unwind-resume.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 2003 Free Software Foundation, Inc.
+/* 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>.
@@ -20,71 +20,83 @@
#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
static void (*libgcc_s_resume) (struct _Unwind_Exception *exc);
static _Unwind_Reason_Code (*libgcc_s_personality)
- (int, _Unwind_Action, _Unwind_Exception_Class, struct _Unwind_Exception *,
- struct _Unwind_Context *);
-static void (*libgcc_s_sjlj_register) (struct SjLj_Function_Context *);
-static void (*libgcc_s_sjlj_unregister) (struct SjLj_Function_Context *);
+ (_Unwind_State, struct _Unwind_Exception *, struct _Unwind_Context *);
+
+static void init (void) __attribute_used__;
static void
init (void)
{
void *resume, *personality;
void *handle;
- void *sjlj_register, *sjlj_unregister;
handle = __libc_dlopen ("libgcc_s.so.1");
if (handle == NULL
- || (sjlj_register = __libc_dlsym (handle, "_Unwind_SjLj_Register")) == NULL
- || (sjlj_unregister = __libc_dlsym (handle, "_Unwind_SjLj_Unregister")) == NULL
- || (resume = __libc_dlsym (handle, "_Unwind_SjLj_Resume")) == NULL
- || (personality = __libc_dlsym (handle, "__gcc_personality_sj0")) == NULL)
- fprintf(stderr, "libgcc_s.so.1 must be installed for pthread_cancel to work\n");
+ || (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;
- libgcc_s_sjlj_register = sjlj_register;
- libgcc_s_sjlj_unregister = sjlj_unregister;
}
-void
-_Unwind_Resume (struct _Unwind_Exception *exc)
-{
- if (__builtin_expect (libgcc_s_resume == NULL, 0))
- init ();
- libgcc_s_resume (exc);
-}
+/* 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"
+);
_Unwind_Reason_Code
-__gcc_personality_v0 (int version, _Unwind_Action actions,
- _Unwind_Exception_Class exception_class,
- struct _Unwind_Exception *ue_header,
- struct _Unwind_Context *context)
+__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 (version, actions, exception_class,
- ue_header, context);
-}
-
-void
-_Unwind_SjLj_Register (struct SjLj_Function_Context *fc)
-{
- if (__builtin_expect (libgcc_s_sjlj_register == NULL, 0))
- init ();
- libgcc_s_sjlj_register (fc);
-}
-
-void
-_Unwind_SjLj_Unregister (struct SjLj_Function_Context *fc)
-{
- if (__builtin_expect (libgcc_s_sjlj_unregister == NULL, 0))
- init ();
- libgcc_s_sjlj_unregister (fc);
+ return libgcc_s_personality (state, ue_header, context);
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-02 21:19:34 +0000