X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=bfd%2Fdwarf1.c;h=fbd0345f6ada68f1cd408afa500a2809a8471276;hb=233cc9c13af8e8182d0ce5b306526b59f5b11f37;hp=b96adc5b4525008851765a95c6f3f57ab0d063f5;hpb=98591c73cf73c16f5bd8709d69700f6970336633;p=deliverable%2Fbinutils-gdb.git diff --git a/bfd/dwarf1.c b/bfd/dwarf1.c index b96adc5b45..fbd0345f6a 100644 --- a/bfd/dwarf1.c +++ b/bfd/dwarf1.c @@ -1,26 +1,27 @@ /* DWARF 1 find nearest line (_bfd_dwarf1_find_nearest_line). - Copyright 1998, 1999, 2000 Free Software Foundation, Inc. + Copyright (C) 1998-2016 Free Software Foundation, Inc. -Written by Gavin Romig-Koch of Cygnus Solutions (gavin@cygnus.com). + Written by Gavin Romig-Koch of Cygnus Solutions (gavin@cygnus.com). -This file is part of BFD. + This file is part of BFD. -This program 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 of the License, or (at -your option) any later version. + This program 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 of the License, or (at + your option) any later version. -This program 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. + This program 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 this program; if not, write to the Free Software -Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, + MA 02110-1301, USA. */ -#include "bfd.h" #include "sysdep.h" +#include "bfd.h" #include "libiberty.h" #include "libbfd.h" #include "elf-bfd.h" @@ -28,54 +29,58 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ /* dwarf1_debug is the starting point for all dwarf1 info. */ -struct dwarf1_debug { - +struct dwarf1_debug +{ /* The bfd we are working with. */ bfd* abfd; + /* Pointer to the symbol table. */ + asymbol** syms; + /* List of already parsed compilation units. */ struct dwarf1_unit* lastUnit; /* The buffer for the .debug section. Zero indicates that the .debug section failed to load. */ - char* debug_section; + bfd_byte *debug_section; /* Pointer to the end of the .debug_info section memory buffer. */ - char* debug_section_end; + bfd_byte *debug_section_end; /* The buffer for the .line section. */ - char* line_section; + bfd_byte *line_section; /* End of that buffer. */ - char* line_section_end; + bfd_byte *line_section_end; /* The current or next unread die within the .debug section. */ - char* currentDie; + bfd_byte *currentDie; }; /* One dwarf1_unit for each parsed compilation unit die. */ -struct dwarf1_unit { +struct dwarf1_unit +{ /* Linked starting from stash->lastUnit. */ struct dwarf1_unit* prev; /* Name of the compilation unit. */ - char* name; + char *name; /* The highest and lowest address used in the compilation unit. */ unsigned long low_pc; unsigned long high_pc; - /* Does this unit have a statement list? */ + /* Does this unit have a statement list? */ int has_stmt_list; /* If any, the offset of the line number table in the .line section. */ unsigned long stmt_list_offset; /* If non-zero, a pointer to the first child of this unit. */ - char* first_child; + bfd_byte *first_child; - /* How many line entries? */ + /* How many line entries? */ unsigned long line_count; /* The decoded line number table (line_count entries). */ @@ -87,7 +92,8 @@ struct dwarf1_unit { /* One dwarf1_func for each parsed function die. */ -struct dwarf1_func { +struct dwarf1_func +{ /* Linked starting from aUnit->func_list. */ struct dwarf1_func* prev; @@ -100,7 +106,8 @@ struct dwarf1_func { }; /* Used to return info about a parsed die. */ -struct die_info { +struct die_info +{ unsigned long length; unsigned long sibling; unsigned long low_pc; @@ -115,7 +122,8 @@ struct die_info { }; /* Parsed line number information. */ -struct linenumber { +struct linenumber +{ /* First address in the line. */ unsigned long addr; @@ -124,20 +132,22 @@ struct linenumber { }; /* Find the form of an attr, from the attr field. */ -#define FORM_FROM_ATTR(attr) ((attr) & 0xF) /* Implicitly specified */ +#define FORM_FROM_ATTR(attr) ((attr) & 0xF) /* Implicitly specified. */ /* Return a newly allocated dwarf1_unit. It should be cleared and then attached into the 'stash' at 'stash->lastUnit'. */ static struct dwarf1_unit* -alloc_dwarf1_unit (stash) - struct dwarf1_debug* stash; +alloc_dwarf1_unit (struct dwarf1_debug* stash) { - struct dwarf1_unit* x = - (struct dwarf1_unit*) bfd_zalloc (stash->abfd, - sizeof (struct dwarf1_unit)); - x->prev = stash->lastUnit; - stash->lastUnit = x; + bfd_size_type amt = sizeof (struct dwarf1_unit); + + struct dwarf1_unit* x = (struct dwarf1_unit *) bfd_zalloc (stash->abfd, amt); + if (x) + { + x->prev = stash->lastUnit; + stash->lastUnit = x; + } return x; } @@ -145,16 +155,17 @@ alloc_dwarf1_unit (stash) /* Return a newly allocated dwarf1_func. It must be cleared and attached into 'aUnit' at 'aUnit->func_list'. */ -static struct dwarf1_func* -alloc_dwarf1_func (stash, aUnit) - struct dwarf1_debug* stash; - struct dwarf1_unit* aUnit; +static struct dwarf1_func * +alloc_dwarf1_func (struct dwarf1_debug* stash, struct dwarf1_unit* aUnit) { - struct dwarf1_func* x = - (struct dwarf1_func*) bfd_zalloc (stash->abfd, - sizeof (struct dwarf1_func)); - x->prev = aUnit->func_list; - aUnit->func_list = x; + bfd_size_type amt = sizeof (struct dwarf1_func); + + struct dwarf1_func* x = (struct dwarf1_func *) bfd_zalloc (stash->abfd, amt); + if (x) + { + x->prev = aUnit->func_list; + aUnit->func_list = x; + } return x; } @@ -164,29 +175,30 @@ alloc_dwarf1_func (stash, aUnit) 'abfd' must be the bfd from which the section that 'aDiePtr' points to was pulled from. - Return false if the die is invalidly formatted; true otherwise. */ + Return FALSE if the die is invalidly formatted; TRUE otherwise. */ -static boolean -parse_die (abfd, aDieInfo, aDiePtr) - bfd* abfd; - struct die_info* aDieInfo; - char* aDiePtr; +static bfd_boolean +parse_die (bfd * abfd, + struct die_info * aDieInfo, + bfd_byte * aDiePtr, + bfd_byte * aDiePtrEnd) { - char* this_die = aDiePtr; - char* xptr = this_die; + bfd_byte *this_die = aDiePtr; + bfd_byte *xptr = this_die; - memset (aDieInfo,0,sizeof (*aDieInfo)); + memset (aDieInfo, 0, sizeof (* aDieInfo)); /* First comes the length. */ aDieInfo->length = bfd_get_32 (abfd, (bfd_byte *) xptr); xptr += 4; - if (aDieInfo->length == 0) - return false; + if (aDieInfo->length == 0 + || (this_die + aDieInfo->length) >= aDiePtrEnd) + return FALSE; if (aDieInfo->length < 6) { /* Just padding bytes. */ aDieInfo->tag = TAG_padding; - return true; + return TRUE; } /* Then the tag. */ @@ -201,7 +213,6 @@ parse_die (abfd, aDieInfo, aDiePtr) /* Parse the attribute based on its form. This section must handle all dwarf1 forms, but need only handle the actual attributes that we care about. */ - attr = bfd_get_16 (abfd, (bfd_byte *) xptr); xptr += 2; @@ -239,47 +250,41 @@ parse_die (abfd, aDieInfo, aDiePtr) break; case FORM_STRING: if (attr == AT_name) - aDieInfo->name = xptr; - xptr += strlen (xptr) + 1; + aDieInfo->name = (char *) xptr; + xptr += strlen ((char *) xptr) + 1; break; } } - return true; + return TRUE; } /* Parse a dwarf1 line number table for 'aUnit->stmt_list_offset' - into 'aUnit->linenumber_table'. Return false if an error - occurs; true otherwise. */ + into 'aUnit->linenumber_table'. Return FALSE if an error + occurs; TRUE otherwise. */ -static boolean -parse_line_table (stash, aUnit) - struct dwarf1_debug* stash; - struct dwarf1_unit* aUnit; +static bfd_boolean +parse_line_table (struct dwarf1_debug* stash, struct dwarf1_unit* aUnit) { - char* xptr; + bfd_byte *xptr; /* Load the ".line" section from the bfd if we haven't already. */ if (stash->line_section == 0) { asection *msec; - unsigned long size; + bfd_size_type size; msec = bfd_get_section_by_name (stash->abfd, ".line"); if (! msec) - return false; + return FALSE; - size = bfd_get_section_size_before_reloc (msec); - stash->line_section = (char *) bfd_alloc (stash->abfd, size); + size = msec->rawsize ? msec->rawsize : msec->size; + stash->line_section + = bfd_simple_get_relocated_section_contents + (stash->abfd, msec, NULL, stash->syms); if (! stash->line_section) - return false; - - if (! bfd_get_section_contents (stash->abfd, msec, stash->line_section, 0, size)) - { - stash->line_section = 0; - return false; - } + return FALSE; stash->line_section_end = stash->line_section + size; } @@ -288,9 +293,9 @@ parse_line_table (stash, aUnit) if (xptr < stash->line_section_end) { unsigned long eachLine; - - char* tblend; + bfd_byte *tblend; unsigned long base; + bfd_size_type amt; /* First comes the length. */ tblend = bfd_get_32 (stash->abfd, (bfd_byte *) xptr) + xptr; @@ -301,13 +306,15 @@ parse_line_table (stash, aUnit) xptr += 4; /* How many line entrys? - 10 = 4 (line number) + 2 (pos in line) + 4 (address in line) */ + 10 = 4 (line number) + 2 (pos in line) + 4 (address in line). */ aUnit->line_count = (tblend - xptr) / 10; /* Allocate an array for the entries. */ - aUnit->linenumber_table = (struct linenumber *) - bfd_alloc (stash->abfd, - sizeof (struct linenumber) * aUnit->line_count); + amt = sizeof (struct linenumber) * aUnit->line_count; + aUnit->linenumber_table = (struct linenumber *) bfd_alloc (stash->abfd, + amt); + if (!aUnit->linenumber_table) + return FALSE; for (eachLine = 0; eachLine < aUnit->line_count; eachLine++) { @@ -326,30 +333,29 @@ parse_line_table (stash, aUnit) } } - return true; + return TRUE; } /* Parse each function die in a compilation unit 'aUnit'. The first child die of 'aUnit' should be in 'aUnit->first_child', the result is placed in 'aUnit->func_list'. - Return false if error; true otherwise. */ + Return FALSE if error; TRUE otherwise. */ -static boolean -parse_functions_in_unit (stash, aUnit) - struct dwarf1_debug* stash; - struct dwarf1_unit* aUnit; +static bfd_boolean +parse_functions_in_unit (struct dwarf1_debug* stash, struct dwarf1_unit* aUnit) { - char* eachDie; + bfd_byte *eachDie; if (aUnit->first_child) for (eachDie = aUnit->first_child; - eachDie < stash->debug_section_end; + eachDie < stash->debug_section_end; ) { struct die_info eachDieInfo; - if (! parse_die (stash->abfd, &eachDieInfo, eachDie)) - return false; + if (! parse_die (stash->abfd, &eachDieInfo, eachDie, + stash->debug_section_end)) + return FALSE; if (eachDieInfo.tag == TAG_global_subroutine || eachDieInfo.tag == TAG_subroutine @@ -357,6 +363,8 @@ parse_functions_in_unit (stash, aUnit) || eachDieInfo.tag == TAG_entry_point) { struct dwarf1_func* aFunc = alloc_dwarf1_func (stash,aUnit); + if (!aFunc) + return FALSE; aFunc->name = eachDieInfo.name; aFunc->low_pc = eachDieInfo.low_pc; @@ -370,25 +378,22 @@ parse_functions_in_unit (stash, aUnit) break; } - return true; + return TRUE; } /* Find the nearest line to 'addr' in 'aUnit'. Return whether we found the line (or a function) without error. */ -static boolean -dwarf1_unit_find_nearest_line (stash, aUnit, addr, - filename_ptr, functionname_ptr, - linenumber_ptr) - struct dwarf1_debug* stash; - struct dwarf1_unit* aUnit; - unsigned long addr; - const char **filename_ptr; - const char **functionname_ptr; - unsigned int *linenumber_ptr; +static bfd_boolean +dwarf1_unit_find_nearest_line (struct dwarf1_debug* stash, + struct dwarf1_unit* aUnit, + unsigned long addr, + const char **filename_ptr, + const char **functionname_ptr, + unsigned int *linenumber_ptr) { - int line_p = false; - int func_p = false; + int line_p = FALSE; + int func_p = FALSE; if (aUnit->low_pc <= addr && addr < aUnit->high_pc) { @@ -400,13 +405,13 @@ dwarf1_unit_find_nearest_line (stash, aUnit, addr, if (! aUnit->linenumber_table) { if (! parse_line_table (stash, aUnit)) - return false; + return FALSE; } if (! aUnit->func_list) { if (! parse_functions_in_unit (stash, aUnit)) - return false; + return FALSE; } for (i = 0; i < aUnit->line_count; i++) @@ -416,7 +421,7 @@ dwarf1_unit_find_nearest_line (stash, aUnit, addr, { *filename_ptr = aUnit->name; *linenumber_ptr = aUnit->linenumber_table[i].linenumber; - line_p = true; + line_p = TRUE; break; } } @@ -429,7 +434,7 @@ dwarf1_unit_find_nearest_line (stash, aUnit, addr, && addr < eachFunc->high_pc) { *functionname_ptr = eachFunc->name; - func_p = true; + func_p = TRUE; break; } } @@ -440,25 +445,23 @@ dwarf1_unit_find_nearest_line (stash, aUnit, addr, } /* The DWARF 1 version of find_nearest line. - Return true if the line is found without error. */ - -boolean -_bfd_dwarf1_find_nearest_line (abfd, section, symbols, offset, - filename_ptr, functionname_ptr, linenumber_ptr) - bfd *abfd; - asection *section; - asymbol **symbols ATTRIBUTE_UNUSED; - bfd_vma offset; - const char **filename_ptr; - const char **functionname_ptr; - unsigned int *linenumber_ptr; + Return TRUE if the line is found without error. */ + +bfd_boolean +_bfd_dwarf1_find_nearest_line (bfd *abfd, + asymbol **symbols, + asection *section, + bfd_vma offset, + const char **filename_ptr, + const char **functionname_ptr, + unsigned int *linenumber_ptr) { struct dwarf1_debug *stash = elf_tdata (abfd)->dwarf1_find_line_info; struct dwarf1_unit* eachUnit; /* What address are we looking for? */ - bfd_vma addr = offset + section->vma; + unsigned long addr = (unsigned long)(offset + section->vma); *filename_ptr = NULL; *functionname_ptr = NULL; @@ -467,68 +470,64 @@ _bfd_dwarf1_find_nearest_line (abfd, section, symbols, offset, if (! stash) { asection *msec; - unsigned long size; + bfd_size_type size = sizeof (struct dwarf1_debug); - stash = elf_tdata (abfd)->dwarf1_find_line_info = - (struct dwarf1_debug*) bfd_zalloc (abfd, sizeof (struct dwarf1_debug)); + stash = elf_tdata (abfd)->dwarf1_find_line_info + = (struct dwarf1_debug *) bfd_zalloc (abfd, size); if (! stash) - return false; + return FALSE; msec = bfd_get_section_by_name (abfd, ".debug"); if (! msec) - { - /* No dwarf1 info. Note that at this point the stash - has been allocated, but contains zeros, this lets - future calls to this function fail quicker. */ - return false; - } + /* No dwarf1 info. Note that at this point the stash + has been allocated, but contains zeros, this lets + future calls to this function fail quicker. */ + return FALSE; - size = bfd_get_section_size_before_reloc (msec); - stash->debug_section = (char *) bfd_alloc (abfd, size); + size = msec->rawsize ? msec->rawsize : msec->size; + stash->debug_section + = bfd_simple_get_relocated_section_contents (abfd, msec, NULL, + symbols); if (! stash->debug_section) - return false; - - if (! bfd_get_section_contents (abfd, msec, stash->debug_section, 0, size)) - { - stash->debug_section = 0; - return false; - } + return FALSE; stash->debug_section_end = stash->debug_section + size; stash->currentDie = stash->debug_section; stash->abfd = abfd; + stash->syms = symbols; } /* A null debug_section indicates that there was no dwarf1 info or that an error occured while setting up the stash. */ if (! stash->debug_section) - return false; + return FALSE; /* Look at the previously parsed units to see if any contain the addr. */ for (eachUnit = stash->lastUnit; eachUnit; eachUnit = eachUnit->prev) - { - if (eachUnit->low_pc <= addr && addr < eachUnit->high_pc) - return dwarf1_unit_find_nearest_line (stash, eachUnit, addr, - filename_ptr, - functionname_ptr, - linenumber_ptr); - } + if (eachUnit->low_pc <= addr && addr < eachUnit->high_pc) + return dwarf1_unit_find_nearest_line (stash, eachUnit, addr, + filename_ptr, + functionname_ptr, + linenumber_ptr); while (stash->currentDie < stash->debug_section_end) { struct die_info aDieInfo; - if (! parse_die (stash->abfd, &aDieInfo, stash->currentDie)) - return false; + if (! parse_die (stash->abfd, &aDieInfo, stash->currentDie, + stash->debug_section_end)) + return FALSE; if (aDieInfo.tag == TAG_compile_unit) { struct dwarf1_unit* aUnit = alloc_dwarf1_unit (stash); + if (!aUnit) + return FALSE; aUnit->name = aDieInfo.name; aUnit->low_pc = aDieInfo.low_pc; @@ -560,7 +559,5 @@ _bfd_dwarf1_find_nearest_line (abfd, section, symbols, offset, stash->currentDie += aDieInfo.length; } - return false; + return FALSE; } - -/* EOF */