x86: Fix to decode grouped AVX with VEX pp bits
Fix to decode grouped AVX with VEX pp bits which should be
handled as same as last-prefixes. This fixes below warnings
in posttest with CONFIG_CRYPTO_SHA1_SSSE3=y.
Warning: arch/x86/tools/test_get_len found difference at <sha1_transform_avx>:ffffffff810d5fc0
Warning: ffffffff810d6069: c5 f9 73 de 04 vpsrldq $0x4,%xmm6,%xmm0
Warning: objdump says 5 bytes, but insn_get_length() says 4
...
With this change, test_get_len can decode it correctly.
$ arch/x86/tools/test_get_len -v -y
ffffffff810d6069: c5 f9 73 de 04 vpsrldq $0x4,%xmm6,%xmm0
Succeed: decoded and checked 1 instructions
Reported-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: yrl.pp-manager.tt@hitachi.com
Link: http://lkml.kernel.org/r/20120210053340.30429.73410.stgit@localhost.localdomain
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/arch/x86/lib/inat.c b/arch/x86/lib/inat.c
index 88ad5fb..c1f01a8 100644
--- a/arch/x86/lib/inat.c
+++ b/arch/x86/lib/inat.c
@@ -29,46 +29,46 @@
return inat_primary_table[opcode];
}
-insn_attr_t inat_get_escape_attribute(insn_byte_t opcode, insn_byte_t last_pfx,
+int inat_get_last_prefix_id(insn_byte_t last_pfx)
+{
+ insn_attr_t lpfx_attr;
+
+ lpfx_attr = inat_get_opcode_attribute(last_pfx);
+ return inat_last_prefix_id(lpfx_attr);
+}
+
+insn_attr_t inat_get_escape_attribute(insn_byte_t opcode, int lpfx_id,
insn_attr_t esc_attr)
{
const insn_attr_t *table;
- insn_attr_t lpfx_attr;
- int n, m = 0;
+ int n;
n = inat_escape_id(esc_attr);
- if (last_pfx) {
- lpfx_attr = inat_get_opcode_attribute(last_pfx);
- m = inat_last_prefix_id(lpfx_attr);
- }
+
table = inat_escape_tables[n][0];
if (!table)
return 0;
- if (inat_has_variant(table[opcode]) && m) {
- table = inat_escape_tables[n][m];
+ if (inat_has_variant(table[opcode]) && lpfx_id) {
+ table = inat_escape_tables[n][lpfx_id];
if (!table)
return 0;
}
return table[opcode];
}
-insn_attr_t inat_get_group_attribute(insn_byte_t modrm, insn_byte_t last_pfx,
+insn_attr_t inat_get_group_attribute(insn_byte_t modrm, int lpfx_id,
insn_attr_t grp_attr)
{
const insn_attr_t *table;
- insn_attr_t lpfx_attr;
- int n, m = 0;
+ int n;
n = inat_group_id(grp_attr);
- if (last_pfx) {
- lpfx_attr = inat_get_opcode_attribute(last_pfx);
- m = inat_last_prefix_id(lpfx_attr);
- }
+
table = inat_group_tables[n][0];
if (!table)
return inat_group_common_attribute(grp_attr);
- if (inat_has_variant(table[X86_MODRM_REG(modrm)]) && m) {
- table = inat_group_tables[n][m];
+ if (inat_has_variant(table[X86_MODRM_REG(modrm)]) && lpfx_id) {
+ table = inat_group_tables[n][lpfx_id];
if (!table)
return inat_group_common_attribute(grp_attr);
}