diff options
| author | Alan Modra <amodra@gmail.com> | 2002-01-05 12:36:18 +0000 |
|---|---|---|
| committer | Alan Modra <amodra@gmail.com> | 2002-01-05 12:36:18 +0000 |
| commit | 3f0a7f7f7351fe42312c4c960abdd0b69f1d2e0c (patch) | |
| tree | 8b46e9288de073632861c7e7adc460070947fae4 /bfd | |
| parent | a752853e6e53b090ab92ff4e29e6efe2bbac28f9 (diff) | |
| download | gdb-3f0a7f7f7351fe42312c4c960abdd0b69f1d2e0c.zip gdb-3f0a7f7f7351fe42312c4c960abdd0b69f1d2e0c.tar.gz gdb-3f0a7f7f7351fe42312c4c960abdd0b69f1d2e0c.tar.bz2 | |
* elf32-mips.c (_bfd_mips_elf_lo16_reloc): Simplify, and perform
sign extension adjustments without conditionals.
Diffstat (limited to 'bfd')
| -rw-r--r-- | bfd/ChangeLog | 5 | ||||
| -rw-r--r-- | bfd/elf32-mips.c | 30 |
2 files changed, 20 insertions, 15 deletions
diff --git a/bfd/ChangeLog b/bfd/ChangeLog index 4695b89..37614e4 100644 --- a/bfd/ChangeLog +++ b/bfd/ChangeLog @@ -1,3 +1,8 @@ +2002-01-05 Alan Modra <amodra@bigpond.net.au> + + * elf32-mips.c (_bfd_mips_elf_lo16_reloc): Simplify, and perform + sign extension adjustments without conditionals. + 2002-01-04 Jakub Jelinek <jakub@redhat.com> * elf-eh-frame.c (_bfd_elf_write_section_eh_frame): Don't crash if diff --git a/bfd/elf32-mips.c b/bfd/elf32-mips.c index 0c44c4e..63e6e02 100644 --- a/bfd/elf32-mips.c +++ b/bfd/elf32-mips.c @@ -1,5 +1,5 @@ /* MIPS-specific support for 32-bit ELF - Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001 + Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc. Most of the information added by Ian Lance Taylor, Cygnus Support, @@ -1786,23 +1786,23 @@ _bfd_mips_elf_lo16_reloc (abfd, to know anything about the LO16 itself, except where to find the low 16 bits of the addend needed by the LO16. */ insn = bfd_get_32 (abfd, l->addr); - vallo = (bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address) - & 0xffff); + vallo = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address); + + /* The low order 16 bits are always treated as a signed + value. */ + vallo = ((vallo & 0xffff) ^ 0x8000) - 0x8000; val = ((insn & 0xffff) << 16) + vallo; val += l->addend; - /* The low order 16 bits are always treated as a signed - value. Therefore, a negative value in the low order bits - requires an adjustment in the high order bits. We need - to make this adjustment in two ways: once for the bits we - took from the data, and once for the bits we are putting - back in to the data. */ - if ((vallo & 0x8000) != 0) - val -= 0x10000; - if ((val & 0x8000) != 0) - val += 0x10000; - - insn = (insn &~ (bfd_vma) 0xffff) | ((val >> 16) & 0xffff); + /* At this point, "val" has the value of the combined HI/LO + pair. If the low order 16 bits (which will be used for + the LO16 insn) are negative, then we will need an + adjustment for the high order 16 bits. */ + val += 0x8000; + val = (val >> 16) & 0xffff; + + insn &= ~ (bfd_vma) 0xffff; + insn |= val; bfd_put_32 (abfd, (bfd_vma) insn, l->addr); if (strcmp (bfd_asymbol_name (symbol), "_gp_disp") == 0) |