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PR binutils/13421 

* readelf.c (arm_section_get_word): Add descriptive comments.
	Initliase the rel_type field of the arm_sec structure.
	(expand_prel31): Rename to arm_expand_prel31.
	(dump_arm_unwind): Use new name.
	Print the function name based on the function address entry.
This commit is contained in:
Nick Clifton 2011-11-28 16:51:09 +00:00
parent 5d9c59954f
commit a734115acd
2 changed files with 96 additions and 61 deletions
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9
binutils/ChangeLog
View File

@ -1,3 +1,12 @@
2011-11-28 Nick Clifton <nickc@redhat.com>
PR binutils/13421
* readelf.c (arm_section_get_word): Add descriptive comments.
Initliase the rel_type field of the arm_sec structure.
(expand_prel31): Rename to arm_expand_prel31.
(dump_arm_unwind): Use new name.
Print the function name based on the function address entry.
2011-11-11 Andreas Schwab <schwab@linux-m68k.org>
* readelf.c (process_program_headers): Fix typo printing p_memsz

148
binutils/readelf.c
View File

@ -6255,24 +6255,21 @@ hppa_process_unwind (FILE * file)
struct arm_section
{
unsigned char *data;
Elf_Internal_Shdr *sec;
Elf_Internal_Rela *rela;
unsigned long nrelas;
unsigned int rel_type;
Elf_Internal_Rela *next_rela;
unsigned char * data; /* The unwind data. */
Elf_Internal_Shdr * sec; /* The cached unwind section header. */
Elf_Internal_Rela * rela; /* The cached relocations for this section. */
unsigned long nrelas; /* The number of relocations. */
unsigned int rel_type; /* REL or RELA ? */
Elf_Internal_Rela * next_rela; /* Cyclic pointer to the next reloc to process. */
};
struct arm_unw_aux_info
{
FILE *file;
Elf_Internal_Sym *symtab; /* The symbol table. */
unsigned long nsyms; /* Number of symbols. */
char *strtab; /* The string table. */
unsigned long strtab_size; /* Size of string table. */
FILE * file; /* The file containing the unwind sections. */
Elf_Internal_Sym * symtab; /* The file's symbol table. */
unsigned long nsyms; /* Number of symbols. */
char * strtab; /* The file's string table. */
unsigned long strtab_size; /* Size of string table. */
};
static const char *
@ -6314,11 +6311,21 @@ arm_free_section (struct arm_section *arm_sec)
free (arm_sec->rela);
}
static int
arm_section_get_word (struct arm_unw_aux_info *aux,
struct arm_section *arm_sec,
Elf_Internal_Shdr *sec, bfd_vma word_offset,
unsigned int *wordp, struct absaddr *addr)
/* 1) If SEC does not match the one cached in ARM_SEC, then free the current
cached section and install SEC instead.
2) Locate the 32-bit word at WORD_OFFSET in unwind section SEC
and return its valued in * WORDP, relocating if necessary.
3) Update the NEXT_RELA field in ARM_SEC and stores the section index and
relocation's offset in ADDR.
4) Return TRUE upon success, FALSE otherwise. */
static bfd_boolean
arm_section_get_word (struct arm_unw_aux_info * aux,
struct arm_section * arm_sec,
Elf_Internal_Shdr * sec,
bfd_vma word_offset,
unsigned int * wordp,
struct absaddr * addr)
{
Elf_Internal_Rela *rp;
Elf_Internal_Sym *sym;
@ -6329,6 +6336,7 @@ arm_section_get_word (struct arm_unw_aux_info *aux,
addr->section = SHN_UNDEF;
addr->offset = 0;
/* If necessary, update the section cache. */
if (sec != arm_sec->sec)
{
Elf_Internal_Shdr *relsec;
@ -6349,12 +6357,13 @@ arm_section_get_word (struct arm_unw_aux_info *aux,
|| section_headers + relsec->sh_info != sec)
continue;
arm_sec->rel_type = relsec->sh_type;
if (relsec->sh_type == SHT_REL)
{
if (!slurp_rel_relocs (aux->file, relsec->sh_offset,
relsec->sh_size,
& arm_sec->rela, & arm_sec->nrelas))
return 0;
return FALSE;
break;
}
else if (relsec->sh_type == SHT_RELA)
@ -6362,19 +6371,25 @@ arm_section_get_word (struct arm_unw_aux_info *aux,
if (!slurp_rela_relocs (aux->file, relsec->sh_offset,
relsec->sh_size,
& arm_sec->rela, & arm_sec->nrelas))
return 0;
return FALSE;
break;
}
else
warn (_("unexpected relocation type (%d) for section %d"),
relsec->sh_type, relsec->sh_info);
}
arm_sec->next_rela = arm_sec->rela;
}
/* If there is no unwind data we can do nothing. */
if (arm_sec->data == NULL)
return 0;
return FALSE;
/* Get the word at the required offset. */
word = byte_get (arm_sec->data + word_offset, 4);
/* Look through the relocs to find the one that applies to the provided offset. */
wrapped = FALSE;
for (rp = arm_sec->next_rela; rp != arm_sec->rela + arm_sec->nrelas; rp++)
{
@ -6398,31 +6413,6 @@ arm_section_get_word (struct arm_unw_aux_info *aux,
if (rp->r_offset < word_offset)
continue;
switch (elf_header.e_machine)
{
case EM_ARM:
relname = elf_arm_reloc_type (ELF32_R_TYPE (rp->r_info));
break;
case EM_TI_C6000:
relname = elf_tic6x_reloc_type (ELF32_R_TYPE (rp->r_info));
break;
default:
abort();
}
if (streq (relname, "R_ARM_NONE")
|| streq (relname, "R_C6000_NONE"))
continue;
if (!(streq (relname, "R_ARM_PREL31")
|| streq (relname, "R_C6000_PREL31")))
{
warn (_("Skipping unexpected relocation type %s\n"), relname);
continue;
}
sym = aux->symtab + ELF32_R_SYM (rp->r_info);
if (arm_sec->rel_type == SHT_REL)
@ -6431,14 +6421,46 @@ arm_section_get_word (struct arm_unw_aux_info *aux,
if (offset & 0x40000000)
offset |= ~ (bfd_vma) 0x7fffffff;
}
else
else if (arm_sec->rel_type == SHT_RELA)
offset = rp->r_addend;
else
abort ();
offset += sym->st_value;
prelval = offset - (arm_sec->sec->sh_addr + rp->r_offset);
if (streq (relname, "R_C6000_PREL31"))
prelval >>= 1;
/* Check that we are processing the expected reloc type. */
if (elf_header.e_machine == EM_ARM)
{
relname = elf_arm_reloc_type (ELF32_R_TYPE (rp->r_info));
if (streq (relname, "R_ARM_NONE"))
continue;
if (! streq (relname, "R_ARM_PREL31"))
{
warn (_("Skipping unexpected relocation type %s\n"), relname);
continue;
}
}
else if (elf_header.e_machine == EM_TI_C6000)
{
relname = elf_tic6x_reloc_type (ELF32_R_TYPE (rp->r_info));
if (streq (relname, "R_C6000_NONE"))
continue;
if (! streq (relname, "R_C6000_PREL31"))
{
warn (_("Skipping unexpected relocation type %s\n"), relname);
continue;
}
prelval >>= 1;
}
else
/* This function currently only supports ARM and TI unwinders. */
abort ();
word = (word & ~ (bfd_vma) 0x7fffffff) | (prelval & 0x7fffffff);
addr->section = sym->st_shndx;
@ -6449,13 +6471,15 @@ arm_section_get_word (struct arm_unw_aux_info *aux,
*wordp = word;
arm_sec->next_rela = rp;
return 1;
return TRUE;
}
static const char *tic6x_unwind_regnames[16] = {
"A15", "B15", "B14", "B13", "B12", "B11", "B10", "B3",
"A14", "A13", "A12", "A11", "A10",
"[invalid reg 13]", "[invalid reg 14]", "[invalid reg 15]"};
static const char *tic6x_unwind_regnames[16] =
{
"A15", "B15", "B14", "B13", "B12", "B11", "B10", "B3",
"A14", "A13", "A12", "A11", "A10",
"[invalid reg 13]", "[invalid reg 14]", "[invalid reg 15]"
};
static void
decode_tic6x_unwind_regmask (unsigned int mask)
@ -6757,7 +6781,8 @@ decode_tic6x_unwind_bytecode (struct arm_unw_aux_info *aux,
unsigned int nregs;
unsigned int i;
const char *name;
struct {
struct
{
unsigned int offset;
unsigned int reg;
} regpos[16];
@ -6814,6 +6839,7 @@ decode_tic6x_unwind_bytecode (struct arm_unw_aux_info *aux,
unsigned char buf[9];
unsigned int i, len;
unsigned long offset;
for (i = 0; i < sizeof (buf); i++)
{
GET_OP (buf[i]);
@ -6842,7 +6868,7 @@ decode_tic6x_unwind_bytecode (struct arm_unw_aux_info *aux,
}
static bfd_vma
expand_prel31 (bfd_vma word, bfd_vma where)
arm_expand_prel31 (bfd_vma word, bfd_vma where)
{
bfd_vma offset;
@ -6881,7 +6907,7 @@ decode_arm_unwind (struct arm_unw_aux_info *aux,
bfd_vma fn;
const char *procname;
fn = expand_prel31 (word, data_sec->sh_addr + data_offset);
fn = arm_expand_prel31 (word, data_sec->sh_addr + data_offset);
printf (_(" Personality routine: "));
procname = arm_print_vma_and_name (aux, fn, addr);
fputc ('\n', stdout);
@ -7001,9 +7027,9 @@ dump_arm_unwind (struct arm_unw_aux_info *aux, Elf_Internal_Shdr *exidx_sec)
return;
}
fn = expand_prel31 (exidx_fn, exidx_sec->sh_addr + 8 * i);
fn = arm_expand_prel31 (exidx_fn, exidx_sec->sh_addr + 8 * i);
arm_print_vma_and_name (aux, fn, entry_addr);
arm_print_vma_and_name (aux, fn, fn_addr);
fputs (": ", stdout);
if (exidx_entry == 1)
@ -7023,7 +7049,7 @@ dump_arm_unwind (struct arm_unw_aux_info *aux, Elf_Internal_Shdr *exidx_sec)
Elf_Internal_Shdr *table_sec;
fputs ("@", stdout);
table = expand_prel31 (exidx_entry, exidx_sec->sh_addr + 8 * i + 4);
table = arm_expand_prel31 (exidx_entry, exidx_sec->sh_addr + 8 * i + 4);
print_vma (table, PREFIX_HEX);
printf ("\n");