Re: [uclibc-ng-devel] [RFC PATCH v4 1/1] 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 &lt;ignacy.gawedzki(a)green-communications.fr&gt; --- libpthread/nptl/sysdeps/Makefile.commonarch | 1 + libpthread/nptl/sysdeps/arm/arm-unwind-resume.c | 67 ++++++++ libpthread/nptl/sysdeps/arm/pt-arm-unwind-resume.c | 2 + libpthread/nptl/sysdeps/arm/rt-arm-unwind-resume.c | 1 + libpthread/nptl/sysdeps/arm/unwind-resume.h | 33 ++++ libpthread/nptl/sysdeps/generic/unwind-resume.c | 75 +++++++++ libpthread/nptl/sysdeps/generic/unwind-resume.h | 33 ++++ .../nptl/sysdeps/pthread/unwind-forcedunwind.c | 49 +++--- libpthread/nptl/sysdeps/pthread/unwind-resume.c | 80 ---------- .../unix/sysv/linux/arm/unwind-forcedunwind.c | 177 --------------------- .../sysdeps/unix/sysv/linux/arm/unwind-resume.c | 116 -------------- 11 files changed, 230 insertions(+), 404 deletions(-) create mode 100644 libpthread/nptl/sysdeps/arm/arm-unwind-resume.c create mode 100644 libpthread/nptl/sysdeps/arm/pt-arm-unwind-resume.c create mode 100644 libpthread/nptl/sysdeps/arm/rt-arm-unwind-resume.c create mode 100644 libpthread/nptl/sysdeps/arm/unwind-resume.h create mode 100644 libpthread/nptl/sysdeps/generic/unwind-resume.c create mode 100644 libpthread/nptl/sysdeps/generic/unwind-resume.h delete mode 100644 libpthread/nptl/sysdeps/pthread/unwind-resume.c delete mode 100644 libpthread/nptl/sysdeps/unix/sysv/linux/arm/unwind-forcedunwind.c delete mode 100644 libpthread/nptl/sysdeps/unix/sysv/linux/arm/unwind-resume.c diff --git a/libpthread/nptl/sysdeps/Makefile.commonarch b/libpthread/nptl/sysdeps/Makefile.commonarch index 7f531f5..c206ac9 100644 --- a/libpthread/nptl/sysdeps/Makefile.commonarch +++ b/libpthread/nptl/sysdeps/Makefile.commonarch @@ -18,6 +18,7 @@ endif libpthread_arch_SSRC := $(filter-out librt-%,$(filter-out libc-%,$(notdir $(wildcard $(libpthread_arch_DIR)/*.S)))) libpthread_arch_CSRC := $(filter-out librt-%,$(filter-out libc-%,$(notdir $(wildcard $(libpthread_arch_DIR)/*.c)))) libpthread_arch_CSRC := $(filter-out gen_%,$(libpthread_arch_CSRC)) +libpthread_arch_CSRC := $(filter-out arm-unwind-resume.% rt-arm-unwind-resume.%,$(libpthread_arch_CSRC)) ifneq ($(TARGET_SUBARCH),) libpthread_subarch_SSRC := $(notdir $(wildcard $(libpthread_subarch_DIR)/*.S)) diff --git a/libpthread/nptl/sysdeps/arm/arm-unwind-resume.c b/libpthread/nptl/sysdeps/arm/arm-unwind-resume.c new file mode 100644 index 0000000..ae55582 --- /dev/null +++ b/libpthread/nptl/sysdeps/arm/arm-unwind-resume.c @@ -0,0 +1,67 @@ +/* Copyright (C) 2003, 2005, 2010 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Jakub Jelinek &lt;jakub(a)redhat.com&gt;om>. + + 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/>. */ + +/* 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. */ + +#include <sysdep.h> + +__asm__ ( +" .globl _Unwind_Resume\n" +" .hidden _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 __libgcc_s_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" +); diff --git a/libpthread/nptl/sysdeps/arm/pt-arm-unwind-resume.c b/libpthread/nptl/sysdeps/arm/pt-arm-unwind-resume.c new file mode 100644 index 0000000..fd0cec4 --- /dev/null +++ b/libpthread/nptl/sysdeps/arm/pt-arm-unwind-resume.c @@ -0,0 +1,2 @@ +__asm__ (".set __libgcc_s_init, pthread_cancel_init"); +#include <arm-unwind-resume.c> diff --git a/libpthread/nptl/sysdeps/arm/rt-arm-unwind-resume.c b/libpthread/nptl/sysdeps/arm/rt-arm-unwind-resume.c new file mode 100644 index 0000000..2641dc5 --- /dev/null +++ b/libpthread/nptl/sysdeps/arm/rt-arm-unwind-resume.c @@ -0,0 +1 @@ +#include <arm-unwind-resume.c> diff --git a/libpthread/nptl/sysdeps/arm/unwind-resume.h b/libpthread/nptl/sysdeps/arm/unwind-resume.h new file mode 100644 index 0000000..736cc83 --- /dev/null +++ b/libpthread/nptl/sysdeps/arm/unwind-resume.h @@ -0,0 +1,33 @@ +/* Definitions for unwind-resume.c. ARM (EABI) version. + Copyright (C) 2015-2016 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 + 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/>. */ + +/* The EABI personality routine has a different signature than the + canonical one. These macros tell sysdeps/gnu/unwind*.c how to + define __gcc_personality_v0. */ +#define PERSONALITY_PROTO \ + (_Unwind_State state, \ + struct _Unwind_Exception *ue_header, \ + struct _Unwind_Context *context) +#define PERSONALITY_ARGS \ + (state, ue_header, context) + +/* 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 (see arm-unwind-resume.S). This macro tells the generic code + not to provide the generic C definition. */ +#define HAVE_ARCH_UNWIND_RESUME 1 diff --git a/libpthread/nptl/sysdeps/generic/unwind-resume.c b/libpthread/nptl/sysdeps/generic/unwind-resume.c new file mode 100644 index 0000000..cd9df9f --- /dev/null +++ b/libpthread/nptl/sysdeps/generic/unwind-resume.c @@ -0,0 +1,75 @@ +/* Copyright (C) 2003 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Jakub Jelinek &lt;jakub(a)redhat.com&gt;om>. + + 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 <stdlib.h> +#include <unwind.h> +#include <libgcc_s.h> +#include <unwind-resume.h> + +#define __libc_dlopen(x) dlopen(x, (RTLD_LOCAL | RTLD_LAZY)) +#define __libc_dlsym dlsym +#define __libc_dlclose dlclose + +void (*__libgcc_s_resume) (struct _Unwind_Exception *exc) + attribute_hidden __attribute__ ((noreturn)); + +static _Unwind_Reason_Code (*libgcc_s_personality) PERSONALITY_PROTO; + +extern +void abort(void); + +void attribute_hidden __attribute__ ((cold)) +__libgcc_s_init(void) +{ + void *resume, *personality; + void *handle; + + handle = __libc_dlopen (LIBGCC_S_SO); + + if (handle == NULL + || (resume = __libc_dlsym (handle, "_Unwind_Resume")) == NULL + || (personality = __libc_dlsym (handle, "__gcc_personality_v0")) == NULL) + { + fprintf (stderr, + LIBGCC_S_SO " must be installed for pthread_cancel to work\n"); + abort(); + } + + __libgcc_s_resume = resume; + libgcc_s_personality = personality; +} + +#if !HAVE_ARCH_UNWIND_RESUME +void attribute_hidden +_Unwind_Resume (struct _Unwind_Exception *exc) +{ + if (__builtin_expect (libgcc_s_resume == NULL, 0)) + __libgcc_s_init (); + __libgcc_s_resume (exc); +} +#endif + +_Unwind_Reason_Code attribute_hidden +__gcc_personality_v0 PERSONALITY_PROTO +{ + if (__builtin_expect (libgcc_s_personality == NULL, 0)) + __libgcc_s_init (); + return libgcc_s_personality PERSONALITY_ARGS; +} diff --git a/libpthread/nptl/sysdeps/generic/unwind-resume.h b/libpthread/nptl/sysdeps/generic/unwind-resume.h new file mode 100644 index 0000000..a0dd638 --- /dev/null +++ b/libpthread/nptl/sysdeps/generic/unwind-resume.h @@ -0,0 +1,33 @@ +/* Definitions for unwind-resume.c. Generic version. + Copyright (C) 2015-2016 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 + 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/>. */ + +/* These describe the arguments to unwinder personality functions, + specifically __gcc_personality_v0. A machine-specific sysdeps + file might define them differently. */ +#define PERSONALITY_PROTO \ + (int version, _Unwind_Action actions, \ + _Unwind_Exception_Class exception_class, \ + struct _Unwind_Exception *ue_header, \ + struct _Unwind_Context *context) +#define PERSONALITY_ARGS \ + (version, actions, exception_class, ue_header, context) + +/* This is defined nonzero by a machine-specific sysdeps file if + _Unwind_Resume is provided separately and thus the generic C + version should not be defined. */ +#define HAVE_ARCH_UNWIND_RESUME 0 diff --git a/libpthread/nptl/sysdeps/pthread/unwind-forcedunwind.c b/libpthread/nptl/sysdeps/pthread/unwind-forcedunwind.c index 6b6ad6f..fd45ce1 100644 --- a/libpthread/nptl/sysdeps/pthread/unwind-forcedunwind.c +++ b/libpthread/nptl/sysdeps/pthread/unwind-forcedunwind.c @@ -22,16 +22,16 @@ #include <pthreadP.h> #include <sysdep.h> #include <libgcc_s.h> +#include <unwind-resume.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 *); +void (*__libgcc_s_resume) (struct _Unwind_Exception *exc) + attribute_hidden __attribute__ ((noreturn)); +static _Unwind_Reason_Code (*libgcc_s_personality) PERSONALITY_PROTO; static _Unwind_Reason_Code (*libgcc_s_forcedunwind) (struct _Unwind_Exception *, _Unwind_Stop_Fn, void *); static _Unwind_Word (*libgcc_s_getcfa) (struct _Unwind_Context *); @@ -66,11 +66,12 @@ pthread_cancel_init (void) #endif ) { - printf (LIBGCC_S_SO " must be installed for pthread_cancel to work\n"); + fprintf (stderr, + LIBGCC_S_SO " must be installed for pthread_cancel to work\n"); abort(); } - libgcc_s_resume = resume; + __libgcc_s_resume = resume; libgcc_s_personality = personality; libgcc_s_forcedunwind = forcedunwind; libgcc_s_getcfa = getcfa; @@ -93,55 +94,41 @@ __unwind_freeres (void) } } -void +#if !HAVE_ARCH_UNWIND_RESUME +void attribute_hidden _Unwind_Resume (struct _Unwind_Exception *exc) { if (__builtin_expect (libgcc_s_handle == NULL, 0)) pthread_cancel_init (); - void (*resume) (struct _Unwind_Exception *exc) = libgcc_s_resume; - resume (exc); + __libgcc_s_resume(exc); } +#endif -_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); -_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) +_Unwind_Reason_Code attribute_hidden +__gcc_personality_v0 PERSONALITY_PROTO { if (__builtin_expect (libgcc_s_handle == NULL, 0)) pthread_cancel_init (); - _Unwind_Reason_Code (*personality) - (int, _Unwind_Action, _Unwind_Exception_Class, struct _Unwind_Exception *, - struct _Unwind_Context *) = libgcc_s_personality; - return personality (version, actions, exception_class, ue_header, context); + return libgcc_s_personality PERSONALITY_ARGS; } -_Unwind_Reason_Code +_Unwind_Reason_Code attribute_hidden _Unwind_ForcedUnwind (struct _Unwind_Exception *exc, _Unwind_Stop_Fn stop, void *stop_argument) { if (__builtin_expect (libgcc_s_handle == NULL, 0)) pthread_cancel_init (); - _Unwind_Reason_Code (*forcedunwind) - (struct _Unwind_Exception *, _Unwind_Stop_Fn, void *) - = libgcc_s_forcedunwind; - return forcedunwind (exc, stop, stop_argument); + return libgcc_s_forcedunwind (exc, stop, stop_argument); } -_Unwind_Word +_Unwind_Word attribute_hidden _Unwind_GetCFA (struct _Unwind_Context *context) { if (__builtin_expect (libgcc_s_handle == NULL, 0)) pthread_cancel_init (); - _Unwind_Word (*getcfa) (struct _Unwind_Context *) = libgcc_s_getcfa; - return getcfa (context); + return libgcc_s_getcfa (context); } diff --git a/libpthread/nptl/sysdeps/pthread/unwind-resume.c b/libpthread/nptl/sysdeps/pthread/unwind-resume.c deleted file mode 100644 index 3c1ce07..0000000 --- a/libpthread/nptl/sysdeps/pthread/unwind-resume.c +++ /dev/null @@ -1,80 +0,0 @@ -/* Copyright (C) 2003 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Jakub Jelinek &lt;jakub(a)redhat.com&gt;om>. - - 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 <stdlib.h> -#include <unwind.h> -#include <libgcc_s.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 *); - -extern -void abort(void); - -static void -init (void) -{ - void *resume, *personality; - void *handle; - resume = personality = NULL; - handle = dlopen (LIBGCC_S_SO, (RTLD_LOCAL | RTLD_LAZY)); - - if (handle == NULL - || (resume = dlsym (handle, "_Unwind_Resume")) == NULL - || (personality = dlsym (handle, "__gcc_personality_v0")) == NULL) - { - printf (LIBGCC_S_SO " must be installed for pthread_cancel to work\n"); - abort(); - } - - libgcc_s_resume = resume; - libgcc_s_personality = personality; -} - -void -_Unwind_Resume (struct _Unwind_Exception *exc) -{ - if (__builtin_expect (libgcc_s_resume == NULL, 0)) - init (); - libgcc_s_resume (exc); -} - -_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); -_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) -{ - if (__builtin_expect (libgcc_s_personality == NULL, 0)) - init (); - return libgcc_s_personality (version, actions, exception_class, - ue_header, context); -} 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 a6a0515..0000000 --- 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 &lt;jakub(a)redhat.com&gt;om>. - - 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 e2e2e0b..0000000 --- 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 &lt;jakub(a)redhat.com&gt;om>. - - 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); -} -- 2.7.4