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| 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 /bfd/elf32-ppc.c | |
| 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 'bfd/elf32-ppc.c')
| -rw-r--r-- | bfd/elf32-ppc.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/bfd/elf32-ppc.c b/bfd/elf32-ppc.c index 1bea6f8..344845d 100644 --- a/bfd/elf32-ppc.c +++ b/bfd/elf32-ppc.c @@ -9147,10 +9147,11 @@ ppc_elf_relocate_section (bfd *output_bfd, unsigned int insn; insn = bfd_get_32 (input_bfd, contents + (rel->r_offset & ~3)); - if ((insn & (0x3f << 26)) == 28u << 26 /* andi */ - || (insn & (0x3f << 26)) == 24u << 26 /* ori */ - || (insn & (0x3f << 26)) == 26u << 26 /* xori */ - || (insn & (0x3f << 26)) == 10u << 26 /* cmpli */) + if ((insn & (0x3f << 26)) == 10u << 26 /* cmpli */) + complain = complain_overflow_bitfield; + else if ((insn & (0x3f << 26)) == 28u << 26 /* andi */ + || (insn & (0x3f << 26)) == 24u << 26 /* ori */ + || (insn & (0x3f << 26)) == 26u << 26 /* xori */) complain = complain_overflow_unsigned; } if (howto->complain_on_overflow != complain) |