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binutils-gdb
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Apply Philip Blundell's patch to prevent range checks on weak symbols.

This commit is contained in:
Nick Clifton 1999-09-13 09:59:02 +00:00
parent 2f66722d55
commit 59f2c4e703
2 changed files with 24 additions and 10 deletions
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7
bfd/ChangeLog
View File

@ -1,3 +1,10 @@
1999-09-13 Philip Blundell <pb@nexus.co.uk>
* elf32-arm.h (elf32_arm_final_link_relocate): Don't range-check
PC24 relocs if the target is an undefined weak symbol.
(arm_add_to_rel): Fix compiler warning.
(elf32_arm_plt0_entry): Correct comments.
1999-09-13 Alan Modra <alan@spri.levels.unisa.edu.au>
* elfcode.h (write_relocs): Check for the_bfd NULL when handling

27
bfd/elf32-arm.h
View File

@ -81,7 +81,7 @@ static int elf32_thumb_to_arm_stub
/* The first entry in a procedure linkage table looks like
this. It is set up so that any shared library function that is
called before the relocation has been set up calles the dynamic
called before the relocation has been set up calls the dynamic
linker first */
static const bfd_byte elf32_arm_plt0_entry [PLT_ENTRY_SIZE] =
@ -89,7 +89,7 @@ static const bfd_byte elf32_arm_plt0_entry [PLT_ENTRY_SIZE] =
0x04, 0xe0, 0x2d, 0xe5, /* str lr, [sp, #-4]! */
0x10, 0xe0, 0x9f, 0xe5, /* ldr lr, [pc, #16] */
0x0e, 0xe0, 0x8f, 0xe0, /* adr lr, pc, lr */
0x08, 0xf0, 0xbe, 0xe5 /* ldr pc, [lr, #-4] */
0x08, 0xf0, 0xbe, 0xe5 /* ldr pc, [lr, #8]! */
};
/* Subsequent entries in a procedure linkage table look like
@ -1229,13 +1229,20 @@ elf32_arm_final_link_relocate (howto, input_bfd, output_bfd,
}
}
/* Perform a signed range check. */
signed_addend = value;
signed_addend >>= howto->rightshift;
if (signed_addend > ((bfd_signed_vma)(howto->dst_mask >> 1))
|| signed_addend < - ((bfd_signed_vma) ((howto->dst_mask + 1) >> 1)))
return bfd_reloc_overflow;
/* It is not an error for an undefined weak reference to be
out of range. Any program that branches to such a symbol
is going to crash anyway, so there is no point worrying
about getting the destination exactly right. */
if (! h || h->root.type != bfd_link_hash_undefweak)
{
/* Perform a signed range check. */
signed_addend = value;
signed_addend >>= howto->rightshift;
if (signed_addend > ((bfd_signed_vma)(howto->dst_mask >> 1))
|| signed_addend < - ((bfd_signed_vma) ((howto->dst_mask + 1) >> 1)))
return bfd_reloc_overflow;
}
value = (signed_addend & howto->dst_mask)
| (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask));
break;
@ -1586,7 +1593,7 @@ elf32_arm_final_link_relocate (howto, input_bfd, output_bfd,
static void
arm_add_to_rel (abfd, address, howto, increment)
bfd * abfd;
bfd_vma address;
bfd_byte * address;
reloc_howto_type * howto;
bfd_signed_vma increment;
{