diff options
author | ro <ro@138bc75d-0d04-0410-961f-82ee72b054a4> | 2011-08-05 14:37:48 +0000 |
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committer | ro <ro@138bc75d-0d04-0410-961f-82ee72b054a4> | 2011-08-05 14:37:48 +0000 |
commit | e59be7e3775cce7a65bfac5c9aeb5f76d42f539b (patch) | |
tree | 80376027cf518687afe9d3c715d908e42d42c267 /libgcc/config/unwind-dw2-fde-darwin.c | |
parent | 81b424acb24cb12818bca93206e80e9476919f75 (diff) | |
download | ppe42-gcc-e59be7e3775cce7a65bfac5c9aeb5f76d42f539b.tar.gz ppe42-gcc-e59be7e3775cce7a65bfac5c9aeb5f76d42f539b.zip |
gcc:
* Makefile.in (UNWIND_H): Remove.
(LIB2ADDEH, LIB2ADDEHSTATIC, LIB2ADDEHSHARED): Move to
../libgcc/Makefile.in.
(LIBUNWIND, SHLIBUNWIND_LINK, SHLIBUNWIND_INSTALL): Likewise.
(LIBUNWINDDEP): Remove.
(libgcc-support): Remove LIB2ADDEH, $(srcdir)/emutls.c dependencies.
(libgcc.mvars): Remove LIB2ADDEH, LIB2ADDEHSTATIC, LIB2ADDEHSHARED,
LIBUNWIND, SHLIBUNWIND_LINK, SHLIBUNWIND_INSTALL.
(stmp-int-hdrs): Remove $(UNWIND_H) dependency.
Don't copy $(UNWIND_H).
* config.gcc (ia64*-*-linux*): Remove with_system_libunwind
handling.
* configure.ac (GCC_CHECK_UNWIND_GETIPINFO): Remove.
* aclocal.m4: Regenerate.
* configure: Regenerate.
* emutls.c, unwind-c.c, unwind-compat.c, unwind-compat.h,
unwind-dw2-fde-compat.c, unwind-dw2-fde-glibc.c, unwind-dw2-fde.c,
unwind-dw2-fde.h, unwind-dw2.c, unwind-dw2.h, unwind-generic.h,
unwind-pe.h, unwind-sjlj.c, unwind.inc: Move to ../libgcc.
* unwind-dw2-fde-darwin.c: Move to ../libgcc/config.
* config/arm/libunwind.S, config/arm/pr-support.c,
config/arm/unwind-arm.c, config/arm/unwind-arm.h: Move to
../libgcc/config/arm.
* config/arm/t-bpabi (UNWIND_H, LIB2ADDEH): Remove.
* config/arm/t-symbian (UNWIND_H, LIB2ADDEH): Remove.
* config/frv/t-frv ($(T)frvbegin$(objext)): Use
$(srcdir)/../libgcc to refer to unwind-dw2-fde.h.
($(T)frvend$(objext)): Likewise.
* config/ia64/t-glibc (LIB2ADDEH): Remove.
* config/ia64/t-glibc-libunwind: Move to ../libgcc/config/ia64.
* config/ia64/fde-glibc.c, config/ia64/fde-vms.c,
config/ia64/unwind-ia64.c, config/ia64/unwind-ia64.h: Move to
../libgcc/config/ia64.
* config/ia64/t-hpux (LIB2ADDEH): Remove.
* config/ia64/t-ia64 (LIB2ADDEH): Remove.
* config/ia64/t-vms (LIB2ADDEH): Remove.
* config/ia64/vms.h (UNW_IVMS_MODE,
MD_UNW_COMPATIBLE_PERSONALITY_P): Remove.
* config/picochip/t-picochip (LIB2ADDEH): Remove.
* config/rs6000/aix.h (R_LR, MD_FROB_UPDATE_CONTEXT): Remove.
* config/rs6000/t-darwin (LIB2ADDEH): Remove.
* config/rs6000/darwin-fallback.c: Move to ../libgcc/config/rs6000.
* config/sh/t-sh ($(T)unwind-dw2-Os-4-200.o): Use
$(srcdir)/../libgcc to refer to unwinder sources.
* config/spu/t-spu-elf (LIB2ADDEH): Remove.
* config/t-darwin (LIB2ADDEH): Remove.
* config/t-freebsd (LIB2ADDEH): Remove.
* config/t-libunwind (LIB2ADDEH, LIB2ADDEHSTATIC): Remove.
* config/t-libunwind-elf: Move to ../libgcc/config.
* config/t-linux (LIB2ADDEH): Remove.
* config/t-sol2 (LIB2ADDEH): Remove.
* config/xtensa/t-xtensa (LIB2ADDEH): Remove.
* system.h (MD_FROB_UPDATE_CONTEXT): Poison.
gcc/po:
* EXCLUDES (unwind-c.c, unwind-dw2-fde-darwin.c)
(unwind-dw2-fde-glibc.c, unwind-dw2-fde.c, unwind-dw2-fde.h)
(unwind-dw2.c, unwind-pe.h, unwind-sjlj.c, unwind.h): Remove.
libgcc:
* Makefile.in (LIB2ADDEH, LIB2ADDEHSTATIC, LIB2ADDEHSHARED): New
variables.
(LIBUNWIND, SHLIBUNWIND_LINK, SHLIBUNWIND_INSTALL): New variables.
(LIB2ADDEH, LIB2ADDEHSTATIC, LIB2ADDEHSHARED): Add $(srcdir)/emutls.c.
(install-unwind_h): New target.
(all): Depend on it.
* config.host (unwind_header): New variable.
(*-*-freebsd*): Set tmake_file to t-eh-dw2-dip.
(*-*-linux*, frv-*-*linux*, *-*-kfreebsd*-gnu, *-*-knetbsd*-gnu,
*-*-gnu*): Likewise, also for *-*-kopensolaris*-gnu.
(*-*-solaris2*): Add t-eh-dw2-dip to tmake_file.
(arm*-*-linux*): Add arm/t-bpabi for arm*-*-linux-*eabi.
Set unwind_header.
(arm*-*-uclinux*): Add arm/t-bpabi for arm*-*-uclinux*eabi.
Set unwind_header.
(arm*-*-eabi*, arm*-*-symbianelf*): Add arm/t-bpabi for
arm*-*-eabi*.
Add arm/t-symbian to tmake_file for arm*-*-symbianelf*.
Set unwind_header.
(ia64*-*-elf*): Add ia64/t-eh-ia64 to tmake_file.
(ia64*-*-freebsd*): Likewise.
(ia64*-*-linux*): Add ia64/t-glibc, ia64/t-eh-ia64, t-libunwind to
tmake_file.
Add t-libunwind-elf, ia64/t-glibc-libunwind unless
$with_system_libunwind.
(ia64*-*-hpux*): Set tmake_file.
(ia64-hp-*vms*): Add ia64/t-eh-ia64 to tmake_file.
(picochip-*-*): Set tmake_file.
(rs6000-ibm-aix4.[3456789]*, powerpc-ibm-aix4.[3456789]*): Set
md_unwind_header.
(rs6000-ibm-aix5.1.*, powerpc-ibm-aix5.1.*): Likewise.
(rs6000-ibm-aix[56789].*, powerpc-ibm-aix[56789].*): Likewise.
(s390x-ibm-tpf*): Add t-eh-dw2-dip to tmake_file.
(xtensa*-*-elf*): Set tmake_file.
(xtensa*-*-linux*): Likewise.
* configure.ac: Include ../config/unwind_ipinfo.m4.
Call GCC_CHECK_UNWIND_GETIPINFO.
Link unwind.h to $unwind_header.
* configure: Regenerate.
* emutls.c, unwind-c.c, unwind-compat.c, unwind-compat.h,
unwind-dw2-fde-compat.c, unwind-dw2-fde-dip.c, unwind-dw2-fde.c,
unwind-dw2-fde.h, unwind-dw2.c, unwind-dw2.h, unwind-generic.h,
unwind-pe.h, unwind-sjlj.c, unwind.inc: New files.
* config/unwind-dw2-fde-darwin.c: New file.
* config/arm/libunwind.S, config/arm/pr-support.c,
config/arm/t-bpabi, config/arm/t-symbian, config/arm/unwind-arm.c,
config/arm/unwind-arm.h,: New files.
* config/ia64/fde-glibc.c, config/ia64/fde-vms.c,
config/ia64/t-eh-ia64, config/ia64/t-glibc,
config/ia64/t-glibc-libunwind, config/ia64/t-hpux,
config/ia64/t-vms, config/ia64/unwind-ia64.c,
config/ia64/unwind-ia64.h: New files.
* config/picochip/t-picochip: New file.
* config/rs6000/aix-unwind.h, config/rs6000/darwin-fallback.c: New
files.
* config/rs6000/t-darwin (LIB2ADDEH): Set.
* config/s390/t-tpf (LIB2ADDEH): Remove.
* config/t-darwin (LIB2ADDEH): Set.
* config/t-eh-dw2-dip: New file.
* config/t-libunwind, config/t-libunwind-elf: New files.
* config/t-sol2 (LIB2ADDEH): Remove.
* config/xtensa/t-xtensa: New file.
gcc/ada:
* gcc-interface/Makefile.in (raise-gcc.o): Search
$(srcdir)/../libgcc.
libgo:
* Makefile.am (AM_CFLAGS): Search $(srcdir)/../libgcc.
* Makefile.in: Regenerate.
libjava:
* configure.ac (GCC_UNWIND_INCLUDE): Rename to
LIBGCC_UNWIND_INCLUDE.
Point to $(multi_basedir)/./libjava/../libgcc.
* configure: Regenerate.
* Makefile.am (GCC_UNWIND_INCLUDE): Reflect this.
* Makefile.in: Regenerate.
libobjc:
* Makefile.in (INCLUDES): Search
$(srcdir)/$(MULTISRCTOP)../libgcc.
libstdc++-v3:
* acinclude.m4 (GLIBCXX_EXPORT_INCLUDES): Point TOPLEVEL_INCLUDES
to $(toplevel_srcdir)/libgcc.
* configure: Regenerate.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@177447 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'libgcc/config/unwind-dw2-fde-darwin.c')
-rw-r--r-- | libgcc/config/unwind-dw2-fde-darwin.c | 289 |
1 files changed, 289 insertions, 0 deletions
diff --git a/libgcc/config/unwind-dw2-fde-darwin.c b/libgcc/config/unwind-dw2-fde-darwin.c new file mode 100644 index 00000000000..75b404e09e9 --- /dev/null +++ b/libgcc/config/unwind-dw2-fde-darwin.c @@ -0,0 +1,289 @@ +/* Copyright (C) 2001, 2002, 2003, 2005, 2009, 2010 + Free Software Foundation, Inc. + + This file is part of GCC. + + GCC is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3, or (at your option) + any later version. + + GCC 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 General Public License for more details. + + Under Section 7 of GPL version 3, you are granted additional + permissions described in the GCC Runtime Library Exception, version + 3.1, as published by the Free Software Foundation. + + You should have received a copy of the GNU General Public License and + a copy of the GCC Runtime Library Exception along with this program; + see the files COPYING3 and COPYING.RUNTIME respectively. If not, see + <http://www.gnu.org/licenses/>. */ + +/* Locate the FDE entry for a given address, using Darwin's keymgr support. */ + +#include "tconfig.h" +#include "tsystem.h" +#include <string.h> +#include <stdlib.h> +#include "dwarf2.h" +#include "unwind.h" +#define NO_BASE_OF_ENCODED_VALUE +#define DWARF2_OBJECT_END_PTR_EXTENSION +#include "unwind-pe.h" +#include "unwind-dw2-fde.h" +/* Carefully don't include gthr.h. */ + +typedef int __gthread_mutex_t; +#define __gthread_mutex_lock(x) (void)(x) +#define __gthread_mutex_unlock(x) (void)(x) + +static const fde * _Unwind_Find_registered_FDE (void *pc, + struct dwarf_eh_bases *bases); + +#define _Unwind_Find_FDE _Unwind_Find_registered_FDE +#include "unwind-dw2-fde.c" +#undef _Unwind_Find_FDE + +/* KeyMgr stuff. */ +#define KEYMGR_GCC3_LIVE_IMAGE_LIST 301 /* loaded images */ +#define KEYMGR_GCC3_DW2_OBJ_LIST 302 /* Dwarf2 object list */ + +extern void *_keymgr_get_and_lock_processwide_ptr (int); +extern void _keymgr_set_and_unlock_processwide_ptr (int, void *); +extern void _keymgr_unlock_processwide_ptr (int); + +struct mach_header; +struct mach_header_64; +extern char *getsectdatafromheader (struct mach_header*, const char*, + const char *, unsigned long *); +extern char *getsectdatafromheader_64 (struct mach_header_64*, const char*, + const char *, unsigned long *); + +/* This is referenced from KEYMGR_GCC3_DW2_OBJ_LIST. */ +struct km_object_info { + struct object *seen_objects; + struct object *unseen_objects; + unsigned spare[2]; +}; + +/* Node of KEYMGR_GCC3_LIVE_IMAGE_LIST. Info about each resident image. */ +struct live_images { + unsigned long this_size; /* sizeof (live_images) */ + struct mach_header *mh; /* the image info */ + unsigned long vm_slide; + void (*destructor)(struct live_images *); /* destructor for this */ + struct live_images *next; + unsigned int examined_p; + void *fde; + void *object_info; + unsigned long info[2]; /* Future use. */ +}; + +/* Bits in the examined_p field of struct live_images. */ +enum { + EXAMINED_IMAGE_MASK = 1, /* We've seen this one. */ + ALLOCED_IMAGE_MASK = 2, /* The FDE entries were allocated by + malloc, and must be freed. This isn't + used by newer libgcc versions. */ + IMAGE_IS_TEXT_MASK = 4, /* This image is in the TEXT segment. */ + DESTRUCTOR_MAY_BE_CALLED_LIVE = 8 /* The destructor may be called on an + object that's part of the live + image list. */ +}; + +/* Delete any data we allocated on a live_images structure. Either + IMAGE has already been removed from the + KEYMGR_GCC3_LIVE_IMAGE_LIST and the struct will be deleted + after we return, or that list is locked and we're being called + because this object might be about to be unloaded. Called by + KeyMgr. */ + +static void +live_image_destructor (struct live_images *image) +{ + if (image->object_info) + { + struct km_object_info *the_obj_info; + + the_obj_info = + _keymgr_get_and_lock_processwide_ptr (KEYMGR_GCC3_DW2_OBJ_LIST); + if (the_obj_info) + { + seen_objects = the_obj_info->seen_objects; + unseen_objects = the_obj_info->unseen_objects; + + /* Free any sorted arrays. */ + __deregister_frame_info_bases (image->fde); + + the_obj_info->seen_objects = seen_objects; + the_obj_info->unseen_objects = unseen_objects; + } + _keymgr_set_and_unlock_processwide_ptr (KEYMGR_GCC3_DW2_OBJ_LIST, + the_obj_info); + + free (image->object_info); + image->object_info = NULL; + if (image->examined_p & ALLOCED_IMAGE_MASK) + free (image->fde); + image->fde = NULL; + } + image->examined_p = 0; + image->destructor = NULL; +} + +/* Run through the list of live images. If we can allocate memory, + give each unseen image a new `struct object'. Even if we can't, + check whether the PC is inside the FDE of each unseen image. + */ + +static inline const fde * +examine_objects (void *pc, struct dwarf_eh_bases *bases, int dont_alloc) +{ + const fde *result = NULL; + struct live_images *image; + + image = _keymgr_get_and_lock_processwide_ptr (KEYMGR_GCC3_LIVE_IMAGE_LIST); + + for (; image != NULL; image = image->next) + if ((image->examined_p & EXAMINED_IMAGE_MASK) == 0) + { + char *fde = NULL; + unsigned long sz; + + /* For ppc only check whether or not we have __DATA eh frames. */ +#ifdef __ppc__ + fde = getsectdatafromheader (image->mh, "__DATA", "__eh_frame", &sz); +#endif + + if (fde == NULL) + { +#if __LP64__ + fde = getsectdatafromheader_64 ((struct mach_header_64 *) image->mh, + "__TEXT", "__eh_frame", &sz); +#else + fde = getsectdatafromheader (image->mh, "__TEXT", + "__eh_frame", &sz); +#endif + if (fde != NULL) + image->examined_p |= IMAGE_IS_TEXT_MASK; + } + + /* If .eh_frame is empty, don't register at all. */ + if (fde != NULL && sz > 0) + { + char *real_fde = (fde + image->vm_slide); + struct object *ob = NULL; + struct object panicob; + + if (! dont_alloc) + ob = calloc (1, sizeof (struct object)); + dont_alloc |= ob == NULL; + if (dont_alloc) + ob = &panicob; + + ob->pc_begin = (void *)-1; + ob->tbase = 0; + ob->dbase = 0; + ob->u.single = (struct dwarf_fde *)real_fde; + ob->s.i = 0; + ob->s.b.encoding = DW_EH_PE_omit; + ob->fde_end = real_fde + sz; + + image->fde = real_fde; + + result = search_object (ob, pc); + + if (! dont_alloc) + { + struct object **p; + + image->destructor = live_image_destructor; + image->object_info = ob; + + image->examined_p |= (EXAMINED_IMAGE_MASK + | DESTRUCTOR_MAY_BE_CALLED_LIVE); + + /* Insert the object into the classified list. */ + for (p = &seen_objects; *p ; p = &(*p)->next) + if ((*p)->pc_begin < ob->pc_begin) + break; + ob->next = *p; + *p = ob; + } + + if (result) + { + int encoding; + _Unwind_Ptr func; + + bases->tbase = ob->tbase; + bases->dbase = ob->dbase; + + encoding = ob->s.b.encoding; + if (ob->s.b.mixed_encoding) + encoding = get_fde_encoding (result); + read_encoded_value_with_base (encoding, + base_from_object (encoding, ob), + result->pc_begin, &func); + bases->func = (void *) func; + break; + } + } + else + image->examined_p |= EXAMINED_IMAGE_MASK; + } + + _keymgr_unlock_processwide_ptr (KEYMGR_GCC3_LIVE_IMAGE_LIST); + + return result; +} + +const fde * +_Unwind_Find_FDE (void *pc, struct dwarf_eh_bases *bases) +{ + struct km_object_info *the_obj_info; + const fde *ret = NULL; + + the_obj_info = + _keymgr_get_and_lock_processwide_ptr (KEYMGR_GCC3_DW2_OBJ_LIST); + if (! the_obj_info) + the_obj_info = calloc (1, sizeof (*the_obj_info)); + + if (the_obj_info != NULL) + { + seen_objects = the_obj_info->seen_objects; + unseen_objects = the_obj_info->unseen_objects; + + ret = _Unwind_Find_registered_FDE (pc, bases); + } + + /* OK, didn't find it in the list of FDEs we've seen before, + so go through and look at the new ones. */ + if (ret == NULL) + ret = examine_objects (pc, bases, the_obj_info == NULL); + + if (the_obj_info != NULL) + { + the_obj_info->seen_objects = seen_objects; + the_obj_info->unseen_objects = unseen_objects; + } + _keymgr_set_and_unlock_processwide_ptr (KEYMGR_GCC3_DW2_OBJ_LIST, + the_obj_info); + return ret; +} + +void * +_darwin10_Unwind_FindEnclosingFunction (void *pc ATTRIBUTE_UNUSED) +{ +#if __MACH__ && (__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ >= 1060) + struct dwarf_eh_bases bases; + const struct dwarf_fde *fde = _Unwind_Find_FDE (pc-1, &bases); + if (fde) + return bases.func; +#endif + return NULL; +} + |