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| author | Alexandre Oliva <aoliva@redhat.com> | 2001-05-16 01:48:13 +0000 |
|---|---|---|
| committer | Alexandre Oliva <aoliva@redhat.com> | 2001-05-16 01:48:13 +0000 |
| commit | 2a0fa9433c462c02e2f71b73eb6f3d21d55fc795 (patch) | |
| tree | 67b3bb9497124772353d2efd87c84b321b3948ed | |
| parent | 9fcc94b61152a17eb617087ed0d689d5f426883d (diff) | |
| download | gdb-2a0fa9433c462c02e2f71b73eb6f3d21d55fc795.zip gdb-2a0fa9433c462c02e2f71b73eb6f3d21d55fc795.tar.gz gdb-2a0fa9433c462c02e2f71b73eb6f3d21d55fc795.tar.bz2 | |
* elf-m10300.c (mn10300_elf_relax_section): Don't relax
negative 32-bit operands to 16 operands when the operand is
going to be zero-extended by the modified opcode.
| -rw-r--r-- | bfd/ChangeLog | 6 | ||||
| -rw-r--r-- | bfd/elf-m10300.c | 36 |
2 files changed, 34 insertions, 8 deletions
diff --git a/bfd/ChangeLog b/bfd/ChangeLog index 66d8fb7..b180d2e 100644 --- a/bfd/ChangeLog +++ b/bfd/ChangeLog @@ -1,3 +1,9 @@ +2001-05-15 Alexandre Oliva <aoliva@redhat.com> + + * elf-m10300.c (mn10300_elf_relax_section): Don't relax + negative 32-bit operands to 16 operands when the operand is + going to be zero-extended by the modified opcode. + 2001-05-12 Peter Targett <peter.targett@arccores.com> * cpu-arc.c (arch_info_struct): Add entry 'base' representing old diff --git a/bfd/elf-m10300.c b/bfd/elf-m10300.c index 268deba..15380bc 100644 --- a/bfd/elf-m10300.c +++ b/bfd/elf-m10300.c @@ -2183,6 +2183,11 @@ mn10300_elf_relax_section (abfd, sec, link_info, again) case 0x91: case 0x92: case 0x93: + /* sp-based offsets are zero-extended. */ + if (code >= 0x90 && code <= 0x93 + && (long)value < 0) + continue; + /* Note that we've changed the relocation contents, etc. */ elf_section_data (sec)->relocs = internal_relocs; free_relocs = NULL; @@ -2231,6 +2236,11 @@ mn10300_elf_relax_section (abfd, sec, link_info, again) && (value & 0x8000)) continue; + /* mov imm16, an zero-extends the immediate. */ + if (code == 0xdc + && (long)value < 0) + continue; + /* Note that we've changed the relocation contents, etc. */ elf_section_data (sec)->relocs = internal_relocs; free_relocs = NULL; @@ -2276,18 +2286,18 @@ mn10300_elf_relax_section (abfd, sec, link_info, again) break; /* mov (abs32),an -> mov (abs16),an - mov (d32,sp),an -> mov (d32,sp),an - mov (d32,sp),dn -> mov (d32,sp),dn - movbu (d32,sp),dn -> movbu (d32,sp),dn - movhu (d32,sp),dn -> movhu (d32,sp),dn + mov (d32,sp),an -> mov (d16,sp),an + mov (d32,sp),dn -> mov (d16,sp),dn + movbu (d32,sp),dn -> movbu (d16,sp),dn + movhu (d32,sp),dn -> movhu (d16,sp),dn add imm32,dn -> add imm16,dn cmp imm32,dn -> cmp imm16,dn add imm32,an -> add imm16,an cmp imm32,an -> cmp imm16,an - and imm32,dn -> and imm32,dn - or imm32,dn -> or imm32,dn - xor imm32,dn -> xor imm32,dn - btst imm32,dn -> btst imm32,dn */ + and imm32,dn -> and imm16,dn + or imm32,dn -> or imm16,dn + xor imm32,dn -> xor imm16,dn + btst imm32,dn -> btst imm16,dn */ case 0xa0: case 0xb0: @@ -2303,6 +2313,16 @@ mn10300_elf_relax_section (abfd, sec, link_info, again) case 0xe1: case 0xe2: case 0xe3: + /* cmp imm16, an zero-extends the immediate. */ + if (code == 0xdc + && (long)value < 0) + continue; + + /* So do sp-based offsets. */ + if (code >= 0xb0 && code <= 0xb3 + && (long)value < 0) + continue; + /* Note that we've changed the relocation contents, etc. */ elf_section_data (sec)->relocs = internal_relocs; free_relocs = NULL; |