riscv
/
binutils-gdb
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity
Browse Source

* elf32-i386.c: Add comment re linker function names and ordering. 

(elf_i386_link_hash_newfunc): Rename to link_hash_newfunc.
	(elf_i386_grok_prstatus): Move before linker functions.
	(elf_i386_grok_psinfo): Likewise.
	(elf_i386_fake_sections): Move so that functions are ordered.
	(elf_i386_reloc_type_class): Likewise.  Comment function purpose.
binutils-2_12-branch
Alan Modra 25 years ago
parent
6e22e505ed
commit
387019538f
2 changed files with 153 additions and 132 deletions
Whitespace
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Split View
Diff Options
Show Stats Download Patch File Download Diff File
  1. 9
      bfd/ChangeLog
  2. 276
      bfd/elf32-i386.c

9
bfd/ChangeLog
View File

@ -1,3 +1,12 @@
2001-09-25 Alan Modra <amodra@bigpond.net.au>
* elf32-i386.c: Add comment re linker function names and ordering.
(elf_i386_link_hash_newfunc): Rename to link_hash_newfunc.
(elf_i386_grok_prstatus): Move before linker functions.
(elf_i386_grok_psinfo): Likewise.
(elf_i386_fake_sections): Move so that functions are ordered.
(elf_i386_reloc_type_class): Likewise. Comment function purpose.
2001-09-25 Alan Modra <amodra@bigpond.net.au>
* elf32-hppa.c: Rename all occurrences of "hplink" to "htab"

276
bfd/elf32-i386.c
View File

@ -31,7 +31,11 @@ static void elf_i386_info_to_howto
static void elf_i386_info_to_howto_rel
PARAMS ((bfd *, arelent *, Elf32_Internal_Rel *));
static boolean elf_i386_is_local_label_name PARAMS ((bfd *, const char *));
static struct bfd_hash_entry *elf_i386_link_hash_newfunc
static boolean elf_i386_grok_prstatus
PARAMS ((bfd *abfd, Elf_Internal_Note *note));
static boolean elf_i386_grok_psinfo
PARAMS ((bfd *abfd, Elf_Internal_Note *note));
static struct bfd_hash_entry *link_hash_newfunc
PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
static struct bfd_link_hash_table *elf_i386_link_hash_table_create
PARAMS ((bfd *));
@ -53,6 +57,8 @@ static boolean allocate_dynrelocs
PARAMS ((struct elf_link_hash_entry *, PTR));
static boolean readonly_dynrelocs
PARAMS ((struct elf_link_hash_entry *, PTR));
static boolean elf_i386_fake_sections
PARAMS ((bfd *, Elf32_Internal_Shdr *, asection *));
static boolean elf_i386_size_dynamic_sections
PARAMS ((bfd *, struct bfd_link_info *));
static boolean elf_i386_relocate_section
@ -61,16 +67,10 @@ static boolean elf_i386_relocate_section
static boolean elf_i386_finish_dynamic_symbol
PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
Elf_Internal_Sym *));
static boolean elf_i386_finish_dynamic_sections
PARAMS ((bfd *, struct bfd_link_info *));
static boolean elf_i386_fake_sections
PARAMS ((bfd *, Elf32_Internal_Shdr *, asection *));
static enum elf_reloc_type_class elf_i386_reloc_type_class
PARAMS ((const Elf_Internal_Rela *));
static boolean elf_i386_grok_prstatus
PARAMS ((bfd *abfd, Elf_Internal_Note *note));
static boolean elf_i386_grok_psinfo
PARAMS ((bfd *abfd, Elf_Internal_Note *note));
static boolean elf_i386_finish_dynamic_sections
PARAMS ((bfd *, struct bfd_link_info *));
#define USE_REL 1 /* 386 uses REL relocations instead of RELA */
@ -315,7 +315,84 @@ elf_i386_is_local_label_name (abfd, name)
return _bfd_elf_is_local_label_name (abfd, name);
}
/* Functions for the i386 ELF linker. */
/* Support for core dump NOTE sections. */
static boolean
elf_i386_grok_prstatus (abfd, note)
bfd *abfd;
Elf_Internal_Note *note;
{
int offset;
size_t raw_size;
switch (note->descsz)
{
default:
return false;
case 144: /* Linux/i386 */
/* pr_cursig */
elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
/* pr_pid */
elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
/* pr_reg */
offset = 72;
raw_size = 68;
break;
}
/* Make a ".reg/999" section. */
return _bfd_elfcore_make_pseudosection (abfd, ".reg",
raw_size, note->descpos + offset);
}
static boolean
elf_i386_grok_psinfo (abfd, note)
bfd *abfd;
Elf_Internal_Note *note;
{
switch (note->descsz)
{
default:
return false;
case 128: /* Linux/MIPS elf_prpsinfo */
elf_tdata (abfd)->core_program
= _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
elf_tdata (abfd)->core_command
= _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
}
/* Note that for some reason, a spurious space is tacked
onto the end of the args in some (at least one anyway)
implementations, so strip it off if it exists. */
{
char *command = elf_tdata (abfd)->core_command;
int n = strlen (command);
if (0 < n && command[n - 1] == ' ')
command[n - 1] = '\0';
}
return true;
}
/* Functions for the i386 ELF linker.
In order to gain some understanding of code in this file without
knowing all the intricate details of the linker, note the
following:
Functions named elf_i386_* are called by external routines, other
functions are only called locally. elf_i386_* functions appear
in this file more or less in the order in which they are called
from external routines. eg. elf_i386_check_relocs is called
early in the link process, elf_i386_finish_dynamic_sections is
one of the last functions. */
/* The name of the dynamic interpreter. This is put in the .interp
section. */
@ -426,7 +503,7 @@ struct elf_i386_link_hash_table
/* Create an entry in an i386 ELF linker hash table. */
static struct bfd_hash_entry *
elf_i386_link_hash_newfunc (entry, table, string)
link_hash_newfunc (entry, table, string)
struct bfd_hash_entry *entry;
struct bfd_hash_table *table;
const char *string;
@ -468,8 +545,7 @@ elf_i386_link_hash_table_create (abfd)
if (ret == (struct elf_i386_link_hash_table *) NULL)
return NULL;
if (! _bfd_elf_link_hash_table_init (&ret->root, abfd,
elf_i386_link_hash_newfunc))
if (! _bfd_elf_link_hash_table_init (&ret->root, abfd, link_hash_newfunc))
{
bfd_release (abfd, ret);
return NULL;
@ -1508,6 +1584,41 @@ elf_i386_size_dynamic_sections (output_bfd, info)
return true;
}
/* Set the correct type for an x86 ELF section. We do this by the
section name, which is a hack, but ought to work. */
static boolean
elf_i386_fake_sections (abfd, hdr, sec)
bfd *abfd ATTRIBUTE_UNUSED;
Elf32_Internal_Shdr *hdr;
asection *sec;
{
register const char *name;
name = bfd_get_section_name (abfd, sec);
/* This is an ugly, but unfortunately necessary hack that is
needed when producing EFI binaries on x86. It tells
elf.c:elf_fake_sections() not to consider ".reloc" as a section
containing ELF relocation info. We need this hack in order to
be able to generate ELF binaries that can be translated into
EFI applications (which are essentially COFF objects). Those
files contain a COFF ".reloc" section inside an ELFNN object,
which would normally cause BFD to segfault because it would
attempt to interpret this section as containing relocation
entries for section "oc". With this hack enabled, ".reloc"
will be treated as a normal data section, which will avoid the
segfault. However, you won't be able to create an ELFNN binary
with a section named "oc" that needs relocations, but that's
the kind of ugly side-effects you get when detecting section
types based on their names... In practice, this limitation is
unlikely to bite. */
if (strcmp (name, ".reloc") == 0)
hdr->sh_type = SHT_PROGBITS;
return true;
}
/* Relocate an i386 ELF section. */
static boolean
@ -2096,6 +2207,26 @@ elf_i386_finish_dynamic_symbol (output_bfd, info, h, sym)
return true;
}
/* Used to decide how to sort relocs in an optimal manner for the
dynamic linker, before writing them out. */
static enum elf_reloc_type_class
elf_i386_reloc_type_class (rela)
const Elf_Internal_Rela *rela;
{
switch ((int) ELF32_R_TYPE (rela->r_info))
{
case R_386_RELATIVE:
return reloc_class_relative;
case R_386_JUMP_SLOT:
return reloc_class_plt;
case R_386_COPY:
return reloc_class_copy;
default:
return reloc_class_normal;
}
}
/* Finish up the dynamic sections. */
static boolean
@ -2218,125 +2349,6 @@ elf_i386_finish_dynamic_sections (output_bfd, info)
return true;
}
/* Set the correct type for an x86 ELF section. We do this by the
section name, which is a hack, but ought to work. */
static boolean
elf_i386_fake_sections (abfd, hdr, sec)
bfd *abfd ATTRIBUTE_UNUSED;
Elf32_Internal_Shdr *hdr;
asection *sec;
{
register const char *name;
name = bfd_get_section_name (abfd, sec);
if (strcmp (name, ".reloc") == 0)
/*
* This is an ugly, but unfortunately necessary hack that is
* needed when producing EFI binaries on x86. It tells
* elf.c:elf_fake_sections() not to consider ".reloc" as a section
* containing ELF relocation info. We need this hack in order to
* be able to generate ELF binaries that can be translated into
* EFI applications (which are essentially COFF objects). Those
* files contain a COFF ".reloc" section inside an ELFNN object,
* which would normally cause BFD to segfault because it would
* attempt to interpret this section as containing relocation
* entries for section "oc". With this hack enabled, ".reloc"
* will be treated as a normal data section, which will avoid the
* segfault. However, you won't be able to create an ELFNN binary
* with a section named "oc" that needs relocations, but that's
* the kind of ugly side-effects you get when detecting section
* types based on their names... In practice, this limitation is
* unlikely to bite.
*/
hdr->sh_type = SHT_PROGBITS;
return true;
}
static enum elf_reloc_type_class
elf_i386_reloc_type_class (rela)
const Elf_Internal_Rela *rela;
{
switch ((int) ELF32_R_TYPE (rela->r_info))
{
case R_386_RELATIVE:
return reloc_class_relative;
case R_386_JUMP_SLOT:
return reloc_class_plt;
case R_386_COPY:
return reloc_class_copy;
default:
return reloc_class_normal;
}
}
/* Support for core dump NOTE sections */
static boolean
elf_i386_grok_prstatus (abfd, note)
bfd *abfd;
Elf_Internal_Note *note;
{
int offset;
size_t raw_size;
switch (note->descsz)
{
default:
return false;
case 144: /* Linux/i386 */
/* pr_cursig */
elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
/* pr_pid */
elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
/* pr_reg */
offset = 72;
raw_size = 68;
break;
}
/* Make a ".reg/999" section. */
return _bfd_elfcore_make_pseudosection (abfd, ".reg",
raw_size, note->descpos + offset);
}
static boolean
elf_i386_grok_psinfo (abfd, note)
bfd *abfd;
Elf_Internal_Note *note;
{
switch (note->descsz)
{
default:
return false;
case 128: /* Linux/MIPS elf_prpsinfo */
elf_tdata (abfd)->core_program
= _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
elf_tdata (abfd)->core_command
= _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
}
/* Note that for some reason, a spurious space is tacked
onto the end of the args in some (at least one anyway)
implementations, so strip it off if it exists. */
{
char *command = elf_tdata (abfd)->core_command;
int n = strlen (command);
if (0 < n && command[n - 1] == ' ')
command[n - 1] = '\0';
}
return true;
}
#define TARGET_LITTLE_SYM bfd_elf32_i386_vec
#define TARGET_LITTLE_NAME "elf32-i386"
#define ELF_ARCH bfd_arch_i386

Write Preview
Loading…
Cancel
Save