Support AMD64/Intel ISAs in assembler/disassembler
authorH.J. Lu <hjl.tools@gmail.com>
Fri, 15 May 2015 16:47:39 +0000 (09:47 -0700)
committerH.J. Lu <hjl.tools@gmail.com>
Fri, 15 May 2015 16:48:10 +0000 (09:48 -0700)
commit5db04b0965e3e7a9344a93de22caae3c111de2cc
tree40942f68d18dc161c6512acad6f408d1e55ce18b
parent0e602686df5677fee06cbd1718b4a7aa5379cd2a
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.
24 files changed:
binutils/ChangeLog
binutils/doc/binutils.texi
gas/ChangeLog
gas/config/tc-i386.c
gas/doc/c-i386.texi
gas/testsuite/ChangeLog
gas/testsuite/gas/i386/i386.exp
gas/testsuite/gas/i386/ilp32/x86-64-branch.d
gas/testsuite/gas/i386/x86-64-branch-2.d [new file with mode: 0644]
gas/testsuite/gas/i386/x86-64-branch-2.s [new file with mode: 0644]
gas/testsuite/gas/i386/x86-64-branch-3.l [new file with mode: 0644]
gas/testsuite/gas/i386/x86-64-branch-3.s [new file with mode: 0644]
gas/testsuite/gas/i386/x86-64-branch.d
ld/testsuite/ChangeLog
ld/testsuite/ld-x86-64/tlsgdesc.dd
ld/testsuite/ld-x86-64/tlspic.dd
ld/testsuite/ld-x86-64/x86-64.exp
opcodes/ChangeLog
opcodes/i386-dis.c
opcodes/i386-gen.c
opcodes/i386-init.h
opcodes/i386-opc.h
opcodes/i386-opc.tbl
opcodes/i386-tbl.h