X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=bfd%2Fsyms.c;h=bf5a48894ca417620c16a652c19de4ed61cf3153;hb=45a466b578083a05f1138eff9232254b1a30f683;hp=6b615a2b5f4bec35c901e2f59cd423972f6b4b49;hpb=eea6121ac0cb22524c627017191ca09825e3d702;p=deliverable%2Fbinutils-gdb.git diff --git a/bfd/syms.c b/bfd/syms.c index 6b615a2b5f..bf5a48894c 100644 --- a/bfd/syms.c +++ b/bfd/syms.c @@ -1,6 +1,6 @@ /* Generic symbol-table support for the BFD library. Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, - 2000, 2001, 2002, 2003, 2004 + 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2009, 2012 Free Software Foundation, Inc. Written by Cygnus Support. @@ -8,7 +8,7 @@ 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 + 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, @@ -18,7 +18,8 @@ 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. */ + Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, + MA 02110-1301, USA. */ /* SECTION @@ -106,6 +107,7 @@ SUBSECTION which has been created using <>. Here is an example showing the creation of a symbol table with only one element: +| #include "sysdep.h" | #include "bfd.h" | int main (void) | { @@ -204,89 +206,107 @@ CODE_FRAGMENT . symvalue value; . . {* Attributes of a symbol. *} -.#define BSF_NO_FLAGS 0x00 +.#define BSF_NO_FLAGS 0x00 . . {* The symbol has local scope; <> in <>. The value . is the offset into the section of the data. *} -.#define BSF_LOCAL 0x01 +.#define BSF_LOCAL (1 << 0) . . {* The symbol has global scope; initialized data in <>. The . value is the offset into the section of the data. *} -.#define BSF_GLOBAL 0x02 +.#define BSF_GLOBAL (1 << 1) . . {* The symbol has global scope and is exported. The value is . the offset into the section of the data. *} .#define BSF_EXPORT BSF_GLOBAL {* No real difference. *} . . {* A normal C symbol would be one of: -. <>, <>, <> or +. <>, <>, <> or . <>. *} . . {* The symbol is a debugging record. The value has an arbitrary . meaning, unless BSF_DEBUGGING_RELOC is also set. *} -.#define BSF_DEBUGGING 0x08 +.#define BSF_DEBUGGING (1 << 2) . . {* The symbol denotes a function entry point. Used in ELF, . perhaps others someday. *} -.#define BSF_FUNCTION 0x10 +.#define BSF_FUNCTION (1 << 3) . . {* Used by the linker. *} -.#define BSF_KEEP 0x20 -.#define BSF_KEEP_G 0x40 +.#define BSF_KEEP (1 << 5) +.#define BSF_KEEP_G (1 << 6) . . {* A weak global symbol, overridable without warnings by . a regular global symbol of the same name. *} -.#define BSF_WEAK 0x80 +.#define BSF_WEAK (1 << 7) . . {* This symbol was created to point to a section, e.g. ELF's . STT_SECTION symbols. *} -.#define BSF_SECTION_SYM 0x100 +.#define BSF_SECTION_SYM (1 << 8) . . {* The symbol used to be a common symbol, but now it is . allocated. *} -.#define BSF_OLD_COMMON 0x200 -. -. {* The default value for common data. *} -.#define BFD_FORT_COMM_DEFAULT_VALUE 0 +.#define BSF_OLD_COMMON (1 << 9) . . {* In some files the type of a symbol sometimes alters its . location in an output file - ie in coff a <> symbol . which is also <> symbol appears where it was . declared and not at the end of a section. This bit is set . by the target BFD part to convey this information. *} -.#define BSF_NOT_AT_END 0x400 +.#define BSF_NOT_AT_END (1 << 10) . . {* Signal that the symbol is the label of constructor section. *} -.#define BSF_CONSTRUCTOR 0x800 +.#define BSF_CONSTRUCTOR (1 << 11) . . {* Signal that the symbol is a warning symbol. The name is a . warning. The name of the next symbol is the one to warn about; . if a reference is made to a symbol with the same name as the next . symbol, a warning is issued by the linker. *} -.#define BSF_WARNING 0x1000 +.#define BSF_WARNING (1 << 12) . . {* Signal that the symbol is indirect. This symbol is an indirect . pointer to the symbol with the same name as the next symbol. *} -.#define BSF_INDIRECT 0x2000 +.#define BSF_INDIRECT (1 << 13) . . {* BSF_FILE marks symbols that contain a file name. This is used . for ELF STT_FILE symbols. *} -.#define BSF_FILE 0x4000 +.#define BSF_FILE (1 << 14) . . {* Symbol is from dynamic linking information. *} -.#define BSF_DYNAMIC 0x8000 +.#define BSF_DYNAMIC (1 << 15) . . {* The symbol denotes a data object. Used in ELF, and perhaps . others someday. *} -.#define BSF_OBJECT 0x10000 +.#define BSF_OBJECT (1 << 16) . . {* This symbol is a debugging symbol. The value is the offset . into the section of the data. BSF_DEBUGGING should be set . as well. *} -.#define BSF_DEBUGGING_RELOC 0x20000 +.#define BSF_DEBUGGING_RELOC (1 << 17) . . {* This symbol is thread local. Used in ELF. *} -.#define BSF_THREAD_LOCAL 0x40000 +.#define BSF_THREAD_LOCAL (1 << 18) +. +. {* This symbol represents a complex relocation expression, +. with the expression tree serialized in the symbol name. *} +.#define BSF_RELC (1 << 19) +. +. {* This symbol represents a signed complex relocation expression, +. with the expression tree serialized in the symbol name. *} +.#define BSF_SRELC (1 << 20) +. +. {* This symbol was created by bfd_get_synthetic_symtab. *} +.#define BSF_SYNTHETIC (1 << 21) +. +. {* This symbol is an indirect code object. Unrelated to BSF_INDIRECT. +. The dynamic linker will compute the value of this symbol by +. calling the function that it points to. BSF_FUNCTION must +. also be also set. *} +.#define BSF_GNU_INDIRECT_FUNCTION (1 << 22) +. {* This symbol is a globally unique data object. The dynamic linker +. will make sure that in the entire process there is just one symbol +. with this name and type in use. BSF_OBJECT must also be set. *} +.#define BSF_GNU_UNIQUE (1 << 23) . . flagword flags; . @@ -307,8 +327,8 @@ CODE_FRAGMENT . */ -#include "bfd.h" #include "sysdep.h" +#include "bfd.h" #include "libbfd.h" #include "safe-ctype.h" #include "bfdlink.h" @@ -355,7 +375,7 @@ bfd_is_local_label (bfd *abfd, asymbol *sym) /* The BSF_SECTION_SYM check is needed for IA-64, where every label that starts with '.' is local. This would accidentally catch section names if we didn't reject them here. */ - if ((sym->flags & (BSF_GLOBAL | BSF_WEAK | BSF_SECTION_SYM)) != 0) + if ((sym->flags & (BSF_GLOBAL | BSF_WEAK | BSF_FILE | BSF_SECTION_SYM)) != 0) return FALSE; if (sym->name == NULL) return FALSE; @@ -380,6 +400,23 @@ DESCRIPTION . */ +/* +FUNCTION + bfd_is_target_special_symbol + +SYNOPSIS + bfd_boolean bfd_is_target_special_symbol (bfd *abfd, asymbol *sym); + +DESCRIPTION + Return TRUE iff a symbol @var{sym} in the BFD @var{abfd} is something + special to the particular target represented by the BFD. Such symbols + should normally not be mentioned to the user. + +.#define bfd_is_target_special_symbol(abfd, sym) \ +. BFD_SEND (abfd, _bfd_is_target_special_symbol, (abfd, sym)) +. +*/ + /* FUNCTION bfd_canonicalize_symtab @@ -438,7 +475,7 @@ DESCRIPTION void bfd_print_symbol_vandf (bfd *abfd, void *arg, asymbol *symbol) { - FILE *file = arg; + FILE *file = (FILE *) arg; flagword type = symbol->flags; @@ -453,11 +490,12 @@ bfd_print_symbol_vandf (bfd *abfd, void *arg, asymbol *symbol) fprintf (file, " %c%c%c%c%c%c%c", ((type & BSF_LOCAL) ? (type & BSF_GLOBAL) ? '!' : 'l' - : (type & BSF_GLOBAL) ? 'g' : ' '), + : (type & BSF_GLOBAL) ? 'g' + : (type & BSF_GNU_UNIQUE) ? 'u' : ' '), (type & BSF_WEAK) ? 'w' : ' ', (type & BSF_CONSTRUCTOR) ? 'C' : ' ', (type & BSF_WARNING) ? 'W' : ' ', - (type & BSF_INDIRECT) ? 'I' : ' ', + (type & BSF_INDIRECT) ? 'I' : (type & BSF_GNU_INDIRECT_FUNCTION) ? 'i' : ' ', (type & BSF_DEBUGGING) ? 'd' : (type & BSF_DYNAMIC) ? 'D' : ' ', ((type & BSF_FUNCTION) ? 'F' @@ -502,10 +540,10 @@ asymbol * _bfd_generic_make_empty_symbol (bfd *abfd) { bfd_size_type amt = sizeof (asymbol); - asymbol *new = bfd_zalloc (abfd, amt); - if (new) - new->the_bfd = abfd; - return new; + asymbol *new_symbol = (asymbol *) bfd_zalloc (abfd, amt); + if (new_symbol) + new_symbol->the_bfd = abfd; + return new_symbol; } /* @@ -625,7 +663,7 @@ bfd_decode_symclass (asymbol *symbol) { char c; - if (bfd_is_com_section (symbol->section)) + if (symbol->section && bfd_is_com_section (symbol->section)) return 'C'; if (bfd_is_und_section (symbol->section)) { @@ -643,6 +681,8 @@ bfd_decode_symclass (asymbol *symbol) } if (bfd_is_ind_section (symbol->section)) return 'I'; + if (symbol->flags & BSF_GNU_INDIRECT_FUNCTION) + return 'i'; if (symbol->flags & BSF_WEAK) { /* If weak, determine if it's specifically an object @@ -652,6 +692,8 @@ bfd_decode_symclass (asymbol *symbol) else return 'W'; } + if (symbol->flags & BSF_GNU_UNIQUE) + return 'u'; if (!(symbol->flags & (BSF_GLOBAL | BSF_LOCAL))) return '?'; @@ -770,7 +812,7 @@ _bfd_generic_read_minisymbols (bfd *abfd, if (storage == 0) return 0; - syms = bfd_malloc (storage); + syms = (asymbol **) bfd_malloc (storage); if (syms == NULL) goto error_return; @@ -837,8 +879,8 @@ struct indexentry static int cmpindexentry (const void *a, const void *b) { - const struct indexentry *contestantA = a; - const struct indexentry *contestantB = b; + const struct indexentry *contestantA = (const struct indexentry *) a; + const struct indexentry *contestantB = (const struct indexentry *) b; if (contestantA->val < contestantB->val) return -1; @@ -925,7 +967,7 @@ _bfd_stab_section_find_nearest_line (bfd *abfd, #define VALOFF (8) #define STABSIZE (12) - info = *pinfo; + info = (struct stab_find_info *) *pinfo; if (info != NULL) { if (info->stabsec == NULL || info->strsec == NULL) @@ -950,7 +992,7 @@ _bfd_stab_section_find_nearest_line (bfd *abfd, char *function_name; bfd_size_type amt = sizeof *info; - info = bfd_zalloc (abfd, amt); + info = (struct stab_find_info *) bfd_zalloc (abfd, amt); if (info == NULL) return FALSE; @@ -963,10 +1005,17 @@ _bfd_stab_section_find_nearest_line (bfd *abfd, if (info->stabsec == NULL || info->strsec == NULL) { - /* No stabs debugging information. Set *pinfo so that we - can return quickly in the info != NULL case above. */ - *pinfo = info; - return TRUE; + /* Try SOM section names. */ + info->stabsec = bfd_get_section_by_name (abfd, "$GDB_SYMBOLS$"); + info->strsec = bfd_get_section_by_name (abfd, "$GDB_STRINGS$"); + + if (info->stabsec == NULL || info->strsec == NULL) + { + /* No stabs debugging information. Set *pinfo so that we + can return quickly in the info != NULL case above. */ + *pinfo = info; + return TRUE; + } } stabsize = (info->stabsec->rawsize @@ -976,8 +1025,8 @@ _bfd_stab_section_find_nearest_line (bfd *abfd, ? info->strsec->rawsize : info->strsec->size); - info->stabs = bfd_alloc (abfd, stabsize); - info->strs = bfd_alloc (abfd, strsize); + info->stabs = (bfd_byte *) bfd_alloc (abfd, stabsize); + info->strs = (bfd_byte *) bfd_alloc (abfd, strsize); if (info->stabs == NULL || info->strs == NULL) return FALSE; @@ -994,7 +1043,7 @@ _bfd_stab_section_find_nearest_line (bfd *abfd, reloc_size = bfd_get_reloc_upper_bound (abfd, info->stabsec); if (reloc_size < 0) return FALSE; - reloc_vector = bfd_malloc (reloc_size); + reloc_vector = (arelent **) bfd_malloc (reloc_size); if (reloc_vector == NULL && reloc_size != 0) return FALSE; reloc_count = bfd_canonicalize_reloc (abfd, info->stabsec, reloc_vector, @@ -1016,6 +1065,10 @@ _bfd_stab_section_find_nearest_line (bfd *abfd, asymbol *sym; r = *pr; + /* Ignore R_*_NONE relocs. */ + if (r->howto->dst_mask == 0) + continue; + if (r->howto->rightshift != 0 || r->howto->size != 2 || r->howto->bitsize != 32 @@ -1087,7 +1140,7 @@ _bfd_stab_section_find_nearest_line (bfd *abfd, amt = info->indextablesize; amt *= sizeof (struct indexentry); - info->indextable = bfd_alloc (abfd, amt); + info->indextable = (struct indexentry *) bfd_alloc (abfd, amt); if (info->indextable == NULL) return FALSE; @@ -1334,15 +1387,16 @@ _bfd_stab_section_find_nearest_line (bfd *abfd, dirlen = strlen (directory_name); if (info->filename == NULL - || strncmp (info->filename, directory_name, dirlen) != 0 - || strcmp (info->filename + dirlen, file_name) != 0) + || filename_ncmp (info->filename, directory_name, dirlen) != 0 + || filename_cmp (info->filename + dirlen, file_name) != 0) { size_t len; - if (info->filename != NULL) - free (info->filename); + /* Don't free info->filename here. objdump and other + apps keep a copy of a previously returned file name + pointer. */ len = strlen (file_name) + 1; - info->filename = bfd_malloc (dirlen + len); + info->filename = (char *) bfd_alloc (abfd, dirlen + len); if (info->filename == NULL) return FALSE; memcpy (info->filename, directory_name, dirlen);