diff options
| author | Alan Modra <amodra@gmail.com> | 2014-06-07 12:09:04 +0930 |
|---|---|---|
| committer | Alan Modra <amodra@gmail.com> | 2014-06-07 14:55:11 +0930 |
| commit | a47622ac1badbd906c7533ef6011b6bb021271ee (patch) | |
| tree | 3e6ad4e4cb4ed80e652cf756cbbacf4a7a6ae3d1 /gold/powerpc.cc | |
| parent | d634c69f87e9b88a5ff5cd8af7a1f60e738ea0bd (diff) | |
| download | gdb-a47622ac1badbd906c7533ef6011b6bb021271ee.zip gdb-a47622ac1badbd906c7533ef6011b6bb021271ee.tar.gz gdb-a47622ac1badbd906c7533ef6011b6bb021271ee.tar.bz2 | |
Allow both signed and unsigned fields in PowerPC cmpli insn
There are legitimate reasons to allow a signed value in a cmpli insn
field, for example to test for a "stw r1,lock@sdarel(r13)" instruction
in user code, a kernel might use
subis r3,r3,STW_R1_0R13@ha # subtract off high part
cmplwi r3,lock@sdarel # is low part accessing lock?
Since the lock@sdarel may take a range of -32768 to 32767,
the allowed range of cmpli immediate must be at least [-32768,65535].
bfd/
* elf32-ppc.c (ppc_elf_relocate_section): Treat field of cmpli
insn as a bitfield; Use complain_overflow_bitfield.
* elf64-ppc.c (ppc64_elf_relocate_section): Likewise.
opcodes/
* ppc-opc.c (UISIGNOPT): Define and use with cmpli.
gas/
* config/tc-ppc.c (ppc_insert_operand): Handle PPC_OPERAND_SIGNOPT
on unsigned fields. Comment on PPC_OPERAND_SIGNOPT signed fields
in 64-bit mode.
gold/
* powerpc.cc (relocate): Treat field of cmpli insn as a bitfield.
Diffstat (limited to 'gold/powerpc.cc')
| -rw-r--r-- | gold/powerpc.cc | 17 |
1 files changed, 9 insertions, 8 deletions
diff --git a/gold/powerpc.cc b/gold/powerpc.cc index bd3994a..96432ed 100644 --- a/gold/powerpc.cc +++ b/gold/powerpc.cc @@ -7409,14 +7409,15 @@ Target_powerpc<size, big_endian>::Relocate::relocate( Insn insn = elfcpp::Swap<32, big_endian>::readval(iview); overflow = Reloc::CHECK_SIGNED; - if (overflow == Reloc::CHECK_LOW_INSN - ? ((insn & (0x3f << 26)) == 28u << 26 /* andi */ - || (insn & (0x3f << 26)) == 24u << 26 /* ori */ - || (insn & (0x3f << 26)) == 26u << 26 /* xori */ - || (insn & (0x3f << 26)) == 10u << 26 /* cmpli */) - : ((insn & (0x3f << 26)) == 29u << 26 /* andis */ - || (insn & (0x3f << 26)) == 25u << 26 /* oris */ - || (insn & (0x3f << 26)) == 27u << 26 /* xoris */)) + if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */) + overflow = Reloc::CHECK_BITFIELD; + else if (overflow == Reloc::CHECK_LOW_INSN + ? ((insn & (0x3f << 26)) == 28u << 26 /* andi */ + || (insn & (0x3f << 26)) == 24u << 26 /* ori */ + || (insn & (0x3f << 26)) == 26u << 26 /* xori */) + : ((insn & (0x3f << 26)) == 29u << 26 /* andis */ + || (insn & (0x3f << 26)) == 25u << 26 /* oris */ + || (insn & (0x3f << 26)) == 27u << 26 /* xoris */)) overflow = Reloc::CHECK_UNSIGNED; } |