/* Read a symbol table in MIPS' format (Third-Eye).
- Copyright 1986, 87, 89, 90, 91, 92, 93, 94, 95, 96, 1998
- Free Software Foundation, Inc.
+
+ Copyright (C) 1986-2020 Free Software Foundation, Inc.
+
Contributed by Alessandro Forin (af@cs.cmu.edu) at CMU. Major work
by Per Bothner, John Gilmore and Ian Lance Taylor at Cygnus Support.
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,
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. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
/* Read symbols from an ECOFF file. Most of the work is done in
mdebugread.c. */
#include "defs.h"
-#include "gdb_string.h"
#include "bfd.h"
#include "symtab.h"
-#include "symfile.h"
#include "objfiles.h"
-#include "buildsym.h"
#include "stabsread.h"
-#include "gdb-stabs.h"
+#include "mdebugread.h"
#include "coff/sym.h"
#include "coff/internal.h"
#include "libcoff.h" /* Private BFD COFF information. */
#include "libecoff.h" /* Private BFD ECOFF information. */
#include "elf/common.h"
+#include "elf/internal.h"
#include "elf/mips.h"
-extern void _initialize_mipsread PARAMS ((void));
-
-static void
-mipscoff_new_init PARAMS ((struct objfile *));
-
-static void
-mipscoff_symfile_init PARAMS ((struct objfile *));
-
-static void
-mipscoff_symfile_read PARAMS ((struct objfile *, int));
-
-static void
-mipscoff_symfile_finish PARAMS ((struct objfile *));
+#include "psymtab.h"
static void
-read_alphacoff_dynamic_symtab PARAMS ((struct section_offsets *,
- struct objfile * objfile));
+read_alphacoff_dynamic_symtab (minimal_symbol_reader &,
+ struct objfile *objfile);
/* Initialize anything that needs initializing when a completely new
symbol file is specified (not just adding some symbols from another
file, e.g. a shared library). */
-extern CORE_ADDR sigtramp_address;
-
static void
-mipscoff_new_init (ignore)
- struct objfile *ignore;
+mipscoff_new_init (struct objfile *ignore)
{
- sigtramp_address = 0;
stabsread_new_init ();
- buildsym_new_init ();
}
/* Initialize to read a symbol file (nothing to do). */
static void
-mipscoff_symfile_init (objfile)
- struct objfile *objfile;
+mipscoff_symfile_init (struct objfile *objfile)
{
}
/* Read a symbol file from a file. */
static void
-mipscoff_symfile_read (objfile, mainline)
- struct objfile *objfile;
- int mainline;
+mipscoff_symfile_read (struct objfile *objfile, symfile_add_flags symfile_flags)
{
bfd *abfd = objfile->obfd;
- struct cleanup *back_to;
- init_minimal_symbol_collection ();
- back_to = make_cleanup ((make_cleanup_func) discard_minimal_symbols, 0);
+ minimal_symbol_reader reader (objfile);
/* Now that the executable file is positioned at symbol table,
process it and define symbols accordingly. */
if (!((*ecoff_backend (abfd)->debug_swap.read_debug_info)
- (abfd, (asection *) NULL, &ecoff_data (abfd)->debug_info)))
- error ("Error reading symbol table: %s", bfd_errmsg (bfd_get_error ()));
+ (abfd, NULL, &ecoff_data (abfd)->debug_info)))
+ error (_("Error reading symbol table: %s"), bfd_errmsg (bfd_get_error ()));
- mdebug_build_psymtabs (objfile, &ecoff_backend (abfd)->debug_swap,
+ mdebug_build_psymtabs (reader, objfile, &ecoff_backend (abfd)->debug_swap,
&ecoff_data (abfd)->debug_info);
/* Add alpha coff dynamic symbols. */
- read_alphacoff_dynamic_symtab (objfile->section_offsets, objfile);
+ read_alphacoff_dynamic_symtab (reader, objfile);
/* Install any minimal symbols that have been collected as the current
- minimal symbols for this objfile. */
-
- install_minimal_symbols (objfile);
-
- /* If the entry_file bounds are still unknown after processing the
- partial symbols, then try to set them from the minimal symbols
- surrounding the entry_point. */
-
- if (mainline
- && objfile->ei.entry_point != INVALID_ENTRY_POINT
- && objfile->ei.entry_file_lowpc == INVALID_ENTRY_LOWPC)
- {
- struct minimal_symbol *m;
-
- m = lookup_minimal_symbol_by_pc (objfile->ei.entry_point);
- if (m && SYMBOL_NAME (m + 1))
- {
- objfile->ei.entry_file_lowpc = SYMBOL_VALUE_ADDRESS (m);
- objfile->ei.entry_file_highpc = SYMBOL_VALUE_ADDRESS (m + 1);
- }
- }
+ minimal symbols for this objfile. */
- do_cleanups (back_to);
+ reader.install ();
}
/* Perform any local cleanups required when we are done with a
particular objfile. */
static void
-mipscoff_symfile_finish (objfile)
- struct objfile *objfile;
+mipscoff_symfile_finish (struct objfile *objfile)
{
}
/* Alpha OSF/1 encapsulates the dynamic symbols in ELF format in a
- standard coff section. The ELF format for the symbols differs from
- the format defined in elf/external.h. It seems that a normal ELF 32 bit
- format is used, and the representation only changes because longs are
- 64 bit on the alpha. In addition, the handling of text/data section
- indices for symbols is different from the ELF ABI.
- As the BFD linker currently does not support dynamic linking on the alpha,
- there seems to be no reason to pollute BFD with another mixture of object
- file formats for now. */
+ standard COFF section. The ELF format for the symbols differs from
+ the format defined in elf/external.h. It seems that a normal ELF
+ 32-bit format is used, and the representation only changes because
+ longs are 64-bit on the alpha. In addition, the handling of
+ text/data section indices for symbols is different from the ELF
+ ABI. As the BFD linker currently does not support dynamic linking
+ on the alpha, there seems to be no reason to pollute BFD with
+ another mixture of object file formats for now. */
/* Format of an alpha external ELF symbol. */
typedef struct
{
- unsigned char st_name[4]; /* Symbol name, index in string tbl */
- unsigned char st_pad[4]; /* Pad to long word boundary */
- unsigned char st_value[8]; /* Value of the symbol */
- unsigned char st_size[4]; /* Associated symbol size */
- unsigned char st_info[1]; /* Type and binding attributes */
- unsigned char st_other[1]; /* No defined meaning, 0 */
- unsigned char st_shndx[2]; /* Associated section index */
-}
-Elfalpha_External_Sym;
+ unsigned char st_name[4]; /* Symbol name, index in string table. */
+ unsigned char st_pad[4]; /* Pad to long word boundary. */
+ unsigned char st_value[8]; /* Value of the symbol. */
+ unsigned char st_size[4]; /* Associated symbol size. */
+ unsigned char st_info[1]; /* Type and binding attributes. */
+ unsigned char st_other[1]; /* No defined meaning, 0. */
+ unsigned char st_shndx[2]; /* Associated section index. */
+} Elfalpha_External_Sym;
/* Format of an alpha external ELF dynamic info structure. */
typedef struct
+{
+ unsigned char d_tag[4]; /* Tag. */
+ unsigned char d_pad[4]; /* Pad to long word boundary. */
+ union
{
- unsigned char d_tag[4]; /* Tag */
- unsigned char d_pad[4]; /* Pad to long word boundary */
- union
- {
- unsigned char d_ptr[8]; /* Pointer value */
- unsigned char d_val[4]; /* Integer value */
- }
- d_un;
+ unsigned char d_ptr[8]; /* Pointer value. */
+ unsigned char d_val[4]; /* Integer value. */
}
-Elfalpha_External_Dyn;
+ d_un;
+} Elfalpha_External_Dyn;
/* Struct to obtain the section pointers for alpha dynamic symbol info. */
struct alphacoff_dynsecinfo
- {
- asection *sym_sect; /* Section pointer for .dynsym section */
- asection *str_sect; /* Section pointer for .dynstr section */
- asection *dyninfo_sect; /* Section pointer for .dynamic section */
- asection *got_sect; /* Section pointer for .got section */
- };
-
-static void
-alphacoff_locate_sections PARAMS ((bfd *, asection *, void *));
+{
+ asection *sym_sect; /* Section pointer for .dynsym section. */
+ asection *str_sect; /* Section pointer for .dynstr section. */
+ asection *dyninfo_sect; /* Section pointer for .dynamic section. */
+ asection *got_sect; /* Section pointer for .got section. */
+};
/* We are called once per section from read_alphacoff_dynamic_symtab.
- We need to examine each section we are passed, check to see
- if it is something we are interested in processing, and
- if so, stash away some access information for the section. */
+ We need to examine each section we are passed, check to see if it
+ is something we are interested in processing, and if so, stash away
+ some access information for the section. */
static void
-alphacoff_locate_sections (ignore_abfd, sectp, sip)
- bfd *ignore_abfd;
- asection *sectp;
- PTR sip;
+alphacoff_locate_sections (bfd *ignore_abfd, asection *sectp, void *sip)
{
- register struct alphacoff_dynsecinfo *si;
+ struct alphacoff_dynsecinfo *si;
si = (struct alphacoff_dynsecinfo *) sip;
- if (STREQ (sectp->name, ".dynsym"))
- {
- si->sym_sect = sectp;
- }
- else if (STREQ (sectp->name, ".dynstr"))
- {
- si->str_sect = sectp;
- }
- else if (STREQ (sectp->name, ".dynamic"))
- {
- si->dyninfo_sect = sectp;
- }
- else if (STREQ (sectp->name, ".got"))
- {
+ if (strcmp (sectp->name, ".dynsym") == 0)
+ si->sym_sect = sectp;
+ else if (strcmp (sectp->name, ".dynstr") == 0)
+ si->str_sect = sectp;
+ else if (strcmp (sectp->name, ".dynamic") == 0)
+ si->dyninfo_sect = sectp;
+ else if (strcmp (sectp->name, ".got") == 0)
si->got_sect = sectp;
- }
}
-/* Scan an alpha dynamic symbol table for symbols of interest and
- add them to the minimal symbol table. */
+/* Scan an alpha dynamic symbol table for symbols of interest and add
+ them to the minimal symbol table. */
static void
-read_alphacoff_dynamic_symtab (section_offsets, objfile)
- struct section_offsets *section_offsets;
- struct objfile *objfile;
+read_alphacoff_dynamic_symtab (minimal_symbol_reader &reader,
+ struct objfile *objfile)
{
bfd *abfd = objfile->obfd;
struct alphacoff_dynsecinfo si;
- char *sym_secptr;
- char *str_secptr;
- char *dyninfo_secptr;
- char *got_secptr;
- bfd_size_type sym_secsize;
- bfd_size_type str_secsize;
- bfd_size_type dyninfo_secsize;
- bfd_size_type got_secsize;
int sym_count;
int i;
int stripped;
Elfalpha_External_Sym *x_symp;
- char *dyninfo_p;
- char *dyninfo_end;
+ gdb_byte *dyninfo_p;
+ gdb_byte *dyninfo_end;
int got_entry_size = 8;
int dt_mips_local_gotno = -1;
int dt_mips_gotsym = -1;
-
/* We currently only know how to handle alpha dynamic symbols. */
if (bfd_get_arch (abfd) != bfd_arch_alpha)
return;
/* Locate the dynamic symbols sections and read them in. */
memset ((char *) &si, 0, sizeof (si));
- bfd_map_over_sections (abfd, alphacoff_locate_sections, (PTR) & si);
- if (si.sym_sect == NULL
- || si.str_sect == NULL
- || si.dyninfo_sect == NULL
- || si.got_sect == NULL)
+ bfd_map_over_sections (abfd, alphacoff_locate_sections, (void *) & si);
+ if (si.sym_sect == NULL || si.str_sect == NULL
+ || si.dyninfo_sect == NULL || si.got_sect == NULL)
return;
- sym_secsize = bfd_get_section_size_before_reloc (si.sym_sect);
- str_secsize = bfd_get_section_size_before_reloc (si.str_sect);
- dyninfo_secsize = bfd_get_section_size_before_reloc (si.dyninfo_sect);
- got_secsize = bfd_get_section_size_before_reloc (si.got_sect);
- sym_secptr = alloca (sym_secsize);
- str_secptr = alloca (str_secsize);
- dyninfo_secptr = alloca (dyninfo_secsize);
- got_secptr = alloca (got_secsize);
-
- if (!bfd_get_section_contents (abfd, si.sym_sect, sym_secptr,
- (file_ptr) 0, sym_secsize))
+ gdb::byte_vector sym_sec (bfd_section_size (si.sym_sect));
+ gdb::byte_vector str_sec (bfd_section_size (si.str_sect));
+ gdb::byte_vector dyninfo_sec (bfd_section_size (si.dyninfo_sect));
+ gdb::byte_vector got_sec (bfd_section_size (si.got_sect));
+
+ if (!bfd_get_section_contents (abfd, si.sym_sect, sym_sec.data (),
+ (file_ptr) 0, sym_sec.size ()))
return;
- if (!bfd_get_section_contents (abfd, si.str_sect, str_secptr,
- (file_ptr) 0, str_secsize))
+ if (!bfd_get_section_contents (abfd, si.str_sect, str_sec.data (),
+ (file_ptr) 0, str_sec.size ()))
return;
- if (!bfd_get_section_contents (abfd, si.dyninfo_sect, dyninfo_secptr,
- (file_ptr) 0, dyninfo_secsize))
+ if (!bfd_get_section_contents (abfd, si.dyninfo_sect, dyninfo_sec.data (),
+ (file_ptr) 0, dyninfo_sec.size ()))
return;
- if (!bfd_get_section_contents (abfd, si.got_sect, got_secptr,
- (file_ptr) 0, got_secsize))
+ if (!bfd_get_section_contents (abfd, si.got_sect, got_sec.data (),
+ (file_ptr) 0, got_sec.size ()))
return;
/* Find the number of local GOT entries and the index for the
- the first dynamic symbol in the GOT. */
- for (dyninfo_p = dyninfo_secptr, dyninfo_end = dyninfo_p + dyninfo_secsize;
+ first dynamic symbol in the GOT. */
+ for ((dyninfo_p = dyninfo_sec.data (),
+ dyninfo_end = dyninfo_p + dyninfo_sec.size ());
dyninfo_p < dyninfo_end;
dyninfo_p += sizeof (Elfalpha_External_Dyn))
{
if (dt_mips_local_gotno < 0 || dt_mips_gotsym < 0)
return;
- /* Scan all dynamic symbols and enter them into the minimal symbol table
- if appropriate. */
- sym_count = sym_secsize / sizeof (Elfalpha_External_Sym);
+ /* Scan all dynamic symbols and enter them into the minimal symbol
+ table if appropriate. */
+ sym_count = sym_sec.size () / sizeof (Elfalpha_External_Sym);
stripped = (bfd_get_symcount (abfd) == 0);
/* Skip first symbol, which is a null dummy. */
- for (i = 1, x_symp = (Elfalpha_External_Sym *) sym_secptr + 1;
+ for (i = 1, x_symp = (Elfalpha_External_Sym *) sym_sec.data () + 1;
i < sym_count;
i++, x_symp++)
{
enum minimal_symbol_type ms_type;
strx = bfd_h_get_32 (abfd, (bfd_byte *) x_symp->st_name);
- if (strx >= str_secsize)
+ if (strx >= str_sec.size ())
continue;
- name = str_secptr + strx;
+ name = (char *) (str_sec.data () + strx);
if (*name == '\0' || *name == '.')
continue;
sym_value = bfd_h_get_64 (abfd, (bfd_byte *) x_symp->st_value);
sym_info = bfd_h_get_8 (abfd, (bfd_byte *) x_symp->st_info);
sym_shndx = bfd_h_get_16 (abfd, (bfd_byte *) x_symp->st_shndx);
+ if (sym_shndx >= (SHN_LORESERVE & 0xffff))
+ sym_shndx += SHN_LORESERVE - (SHN_LORESERVE & 0xffff);
isglobal = (ELF_ST_BIND (sym_info) == STB_GLOBAL);
if (sym_shndx == SHN_UNDEF)
If sym_value is zero, then we have to get the GOT entry
for the symbol.
- If the GOT entry is nonzero, it represents the quickstart
- address of the function and we use that as the symbol value.
- If the GOT entry is zero, the function address has to be resolved
- by the runtime loader before the executable is started.
- We are unable to find any meaningful address for these
- functions in the executable file, so we skip them. */
+ If the GOT entry is nonzero, it represents the quickstart
+ address of the function and we use that as the symbol
+ value.
+
+ If the GOT entry is zero, the function address has to be
+ resolved by the runtime loader before the executable is
+ started. We are unable to find any meaningful address
+ for these functions in the executable file, so we skip
+ them. */
if (sym_value == 0)
{
int got_entry_offset =
- (i - dt_mips_gotsym + dt_mips_local_gotno) * got_entry_size;
+ (i - dt_mips_gotsym + dt_mips_local_gotno) * got_entry_size;
- if (got_entry_offset < 0 || got_entry_offset >= got_secsize)
+ if (got_entry_offset < 0
+ || got_entry_offset >= got_sec.size ())
continue;
sym_value =
bfd_h_get_64 (abfd,
- (bfd_byte *) (got_secptr + got_entry_offset));
+ (bfd_byte *) (got_sec.data ()
+ + got_entry_offset));
if (sym_value == 0)
continue;
}
}
else
{
- /* Symbols defined in the executable itself. We only care about
- them if this is a stripped executable, otherwise they have
- been retrieved from the normal symbol table already. */
+ /* Symbols defined in the executable itself. We only care
+ about them if this is a stripped executable, otherwise
+ they have been retrieved from the normal symbol table
+ already. */
if (!stripped)
continue;
ms_type = mst_text;
else
ms_type = mst_file_text;
- sym_value += ANOFFSET (section_offsets, SECT_OFF_TEXT);
}
else if (sym_shndx == SHN_MIPS_DATA)
{
ms_type = mst_data;
else
ms_type = mst_file_data;
- sym_value += ANOFFSET (section_offsets, SECT_OFF_DATA);
}
else if (sym_shndx == SHN_MIPS_ACOMMON)
{
ms_type = mst_bss;
else
ms_type = mst_file_bss;
- sym_value += ANOFFSET (section_offsets, SECT_OFF_BSS);
}
else if (sym_shndx == SHN_ABS)
{
}
}
- prim_record_minimal_symbol (name, sym_value, ms_type, objfile);
+ reader.record (name, sym_value, ms_type);
}
}
-/* Initialization */
+/* Initialization. */
-static struct sym_fns ecoff_sym_fns =
+static const struct sym_fns ecoff_sym_fns =
{
- bfd_target_ecoff_flavour,
- mipscoff_new_init, /* sym_new_init: init anything gbl to entire symtab */
- mipscoff_symfile_init, /* sym_init: read initial info, setup for sym_read() */
- mipscoff_symfile_read, /* sym_read: read a symbol file into symtab */
- mipscoff_symfile_finish, /* sym_finish: finished with file, cleanup */
- default_symfile_offsets, /* sym_offsets: dummy FIXME til implem sym reloc */
- NULL /* next: pointer to next struct sym_fns */
+ mipscoff_new_init, /* init anything gbl to entire symtab */
+ mipscoff_symfile_init, /* read initial info, setup for sym_read() */
+ mipscoff_symfile_read, /* read a symbol file into symtab */
+ NULL, /* sym_read_psymbols */
+ mipscoff_symfile_finish, /* finished with file, cleanup */
+ default_symfile_offsets, /* dummy FIXME til implem sym reloc */
+ default_symfile_segments, /* Get segment information from a file. */
+ NULL,
+ default_symfile_relocate, /* Relocate a debug section. */
+ NULL, /* sym_probe_fns */
+ &psym_functions
};
void
-_initialize_mipsread ()
+_initialize_mipsread (void)
{
- add_symtab_fns (&ecoff_sym_fns);
+ add_symtab_fns (bfd_target_ecoff_flavour, &ecoff_sym_fns);
}
projects / deliverable / binutils-gdb.git / blobdiff