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| author | H.J. Lu <hjl.tools@gmail.com> | 2015-05-15 09:47:39 -0700 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2015-05-15 09:48:10 -0700 |
| commit | 5db04b0965e3e7a9344a93de22caae3c111de2cc (patch) | |
| tree | 40942f68d18dc161c6512acad6f408d1e55ce18b /gas/doc | |
| parent | 0e602686df5677fee06cbd1718b4a7aa5379cd2a (diff) | |
| download | gdb-5db04b0965e3e7a9344a93de22caae3c111de2cc.zip gdb-5db04b0965e3e7a9344a93de22caae3c111de2cc.tar.gz gdb-5db04b0965e3e7a9344a93de22caae3c111de2cc.tar.bz2 | |
Support AMD64/Intel ISAs in assembler/disassembler
AMD64 spec and Intel64 spec differ in direct unconditional branches in
64-bit mode. AMD64 supports direct unconditional branches with 16-bit
offset via the data size prefix, which truncates RIP to 16 bits, while
the data size prefix is ignored by Intel64.
This patch adds -mamd64/-mintel64 option to x86-64 assembler and
-Mamd64/-Mintel64 option to x86-64 disassembler. The most permissive
ISA, which is AMD64, is the default.
GDB can add an option, similar to
(gdb) help set disassembly-flavor
Set the disassembly flavor.
The valid values are "att" and "intel", and the default value is "att".
to select which ISA to disassemble.
binutils/
PR binutis/18386
* doc/binutils.texi: Document -Mamd64 and -Mintel64.
gas/
PR binutis/18386
* config/tc-i386.c (OPTION_MAMD64): New.
(OPTION_MINTEL64): Likewise.
(md_longopts): Add -mamd64 and -mintel64.
(md_parse_option): Handle OPTION_MAMD64 and OPTION_MINTEL64.
(md_show_usage): Add -mamd64 and -mintel64.
* doc/c-i386.texi: Document -mamd64 and -mintel64.
gas/testsuite/
PR binutis/18386
* gas/i386/i386.exp: Run x86-64-branch-2 and x86-64-branch-3.
* gas/i386/x86-64-branch.d: Also pass -Mintel64 to objdump.
* gas/i386/ilp32/x86-64-branch.d: Likewise.
* gas/i386/x86-64-branch-2.d: New file.
* gas/i386/x86-64-branch-2.s: Likewise.
* gas/i386/x86-64-branch-3.l: Likewise.
* gas/i386/x86-64-branch-3.s: Likewise.
ld/testsuite/
PR binutis/18386
* ld-x86-64/tlsgdesc.dd: Also pass -Mintel64 to objdump.
* ld-x86-64/tlspic.dd: Likewise.
* ld-x86-64/x86-64.exp (x86_64tests): Also pass -Mintel64 to
objdump for tlspic.dd and tlsgdesc.dd.
opcodes/
PR binutis/18386
* i386-dis.c: Add comments for '@'.
(x86_64_table): Use '@' on call/jmp for X86_64_E8/X86_64_E9.
(enum x86_64_isa): New.
(isa64): Likewise.
(print_i386_disassembler_options): Add amd64 and intel64.
(print_insn): Handle amd64 and intel64.
(putop): Handle '@'.
(OP_J): Don't ignore the operand size prefix for AMD64 in 64-bit.
* i386-gen.c (cpu_flags): Add CpuAMD64 and CpuIntel64.
* i386-opc.h (AMD64): New.
(CpuIntel64): Likewise.
(i386_cpu_flags): Add cpuamd64 and cpuintel64.
* i386-opc.tbl: Add direct call/jmp with Disp16|Disp32 for AMD64.
Mark direct call/jmp without Disp16|Disp32 as Intel64.
* i386-init.h: Regenerated.
* i386-tbl.h: Likewise.
Diffstat (limited to 'gas/doc')
| -rw-r--r-- | gas/doc/c-i386.texi | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/gas/doc/c-i386.texi b/gas/doc/c-i386.texi index ea08c63..6118987 100644 --- a/gas/doc/c-i386.texi +++ b/gas/doc/c-i386.texi @@ -339,6 +339,13 @@ of EVEX instruction with 00, which is the default. and @option{-mevexrcig=@var{rz}} will encode SAE-only EVEX instructions with 01, 10 and 11 RC bits, respectively. +@cindex @samp{-mamd64} option, x86-64 +@cindex @samp{-mintel64} option, x86-64 +@item -mamd64 +@itemx -mintel64 +This option specifies that the assembler should accept only AMD64 or +Intel64 ISA in 64-bit mode. The default is to accept both. + @end table @c man end |