diff options
Diffstat (limited to 'gcc-4.2.1-5666.3/gcc/unwind-dw2-fde-darwin.c')
| -rw-r--r-- | gcc-4.2.1-5666.3/gcc/unwind-dw2-fde-darwin.c | 278 |
1 files changed, 0 insertions, 278 deletions
diff --git a/gcc-4.2.1-5666.3/gcc/unwind-dw2-fde-darwin.c b/gcc-4.2.1-5666.3/gcc/unwind-dw2-fde-darwin.c deleted file mode 100644 index 6a49f453a..000000000 --- a/gcc-4.2.1-5666.3/gcc/unwind-dw2-fde-darwin.c +++ /dev/null @@ -1,278 +0,0 @@ -/* Copyright (C) 2001, 2002, 2003, 2005 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 2, 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. - - You should have received a copy of the GNU General Public License - along with GCC; see the file COPYING. If not, write to - the Free Software Foundation, 51 Franklin Street, Fifth Floor, - Boston, MA 02110-1301, USA. */ - -/* As a special exception, if you link this library with other files, - some of which are compiled with GCC, to produce an executable, - this library does not by itself cause the resulting executable - to be covered by the GNU General Public License. - This exception does not however invalidate any other reasons why - the executable file might be covered by the GNU General Public License. */ - -/* 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; -} |