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| author | Nick Clifton <nickc@redhat.com> | 1999-09-13 09:59:02 +0000 |
|---|---|---|
| committer | Nick Clifton <nickc@redhat.com> | 1999-09-13 09:59:02 +0000 |
| commit | 59f2c4e703f7c5f894322210c24e0ffc4c1c56eb (patch) | |
| tree | 96258a722826126d943d26e3286ce2256b1a4cb9 | |
| parent | 2f66722d5578761036ef07bf98897e2d119dbf10 (diff) | |
| download | gdb-59f2c4e703f7c5f894322210c24e0ffc4c1c56eb.zip gdb-59f2c4e703f7c5f894322210c24e0ffc4c1c56eb.tar.gz gdb-59f2c4e703f7c5f894322210c24e0ffc4c1c56eb.tar.bz2 | |
Apply Philip Blundell's patch to prevent range checks on weak symbols.
| -rw-r--r-- | bfd/ChangeLog | 7 | ||||
| -rw-r--r-- | bfd/elf32-arm.h | 27 |
2 files changed, 24 insertions, 10 deletions
diff --git a/bfd/ChangeLog b/bfd/ChangeLog index 413998a..557562b 100644 --- a/bfd/ChangeLog +++ b/bfd/ChangeLog @@ -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 diff --git a/bfd/elf32-arm.h b/bfd/elf32-arm.h index fe7fa82..2ebfa86 100644 --- a/bfd/elf32-arm.h +++ b/bfd/elf32-arm.h @@ -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; { |