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| author | H.J. Lu <hjl.tools@gmail.com> | 2011-01-18 17:08:13 +0000 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2011-01-18 17:08:13 +0000 |
| commit | e3949f17f39bb2cf78561541b0473cd93cb000cf (patch) | |
| tree | e00f63abb051ca68530132dd45183dabbf3ec9af /opcodes/i386-dis.c | |
| parent | 0ae8ca9029b209a60351c07da4380985dcd15e15 (diff) | |
| download | gdb-e3949f17f39bb2cf78561541b0473cd93cb000cf.zip gdb-e3949f17f39bb2cf78561541b0473cd93cb000cf.tar.gz gdb-e3949f17f39bb2cf78561541b0473cd93cb000cf.tar.bz2 | |
Properly sign-extend byte.
gas/testsuite/
2011-01-18 H.J. Lu <hongjiu.lu@intel.com>
* gas/i386/intel.d: Updated.
* gas/i386/opcode-intel.d: Likewise.
* gas/i386/opcode-suffix.d: Likewise.
* gas/i386/opcode.d: Likewise.
opcodes/
2011-01-18 H.J. Lu <hongjiu.lu@intel.com>
* i386-dis.c (sIbT): New.
(b_T_mode): Likewise.
(dis386): Replace sIb with sIbT on "pushT".
(x86_64_table): Replace sIb with Ib on "aam" and "aad".
(OP_sI): Handle b_T_mode. Properly sign-extend byte.
Diffstat (limited to 'opcodes/i386-dis.c')
| -rw-r--r-- | opcodes/i386-dis.c | 31 |
1 files changed, 28 insertions, 3 deletions
diff --git a/opcodes/i386-dis.c b/opcodes/i386-dis.c index a4e16cb..c9dd17a 100644 --- a/opcodes/i386-dis.c +++ b/opcodes/i386-dis.c @@ -252,6 +252,7 @@ fetch_data (struct disassemble_info *info, bfd_byte *addr) #define Rm { OP_R, m_mode } #define Ib { OP_I, b_mode } #define sIb { OP_sI, b_mode } /* sign extened byte */ +#define sIbT { OP_sI, b_T_mode } /* sign extened byte like 'T' */ #define Iv { OP_I, v_mode } #define sIv { OP_sI, v_mode } #define Iq { OP_I, q_mode } @@ -414,6 +415,8 @@ enum b_mode = 1, /* byte operand with operand swapped */ b_swap_mode, + /* byte operand, sign extend like 'T' suffix */ + b_T_mode, /* operand size depends on prefixes */ v_mode, /* operand size depends on prefixes with operand swapped */ @@ -1790,7 +1793,7 @@ static const struct dis386 dis386[] = { /* 68 */ { "pushT", { sIv } }, { "imulS", { Gv, Ev, Iv } }, - { "pushT", { sIb } }, + { "pushT", { sIbT } }, { "imulS", { Gv, Ev, sIb } }, { "ins{b|}", { Ybr, indirDX } }, { X86_64_TABLE (X86_64_6D) }, @@ -5544,12 +5547,12 @@ static const struct dis386 x86_64_table[][2] = { /* X86_64_D4 */ { - { "aam", { sIb } }, + { "aam", { Ib } }, }, /* X86_64_D5 */ { - { "aad", { sIb } }, + { "aad", { Ib } }, }, /* X86_64_EA */ @@ -13731,10 +13734,32 @@ OP_sI (int bytemode, int sizeflag) switch (bytemode) { case b_mode: + case b_T_mode: FETCH_DATA (the_info, codep + 1); op = *codep++; if ((op & 0x80) != 0) op -= 0x100; + if (bytemode == b_T_mode) + { + if (address_mode != mode_64bit + || !(sizeflag & DFLAG)) + { + if (sizeflag & DFLAG) + op &= 0xffffffff; + else + op &= 0xffff; + } + } + else + { + if (!(rex & REX_W)) + { + if (sizeflag & DFLAG) + op &= 0xffffffff; + else + op &= 0xffff; + } + } break; case v_mode: if (sizeflag & DFLAG) |