summaryrefslogtreecommitdiffstats
path: root/arch/x86/lib
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2012-04-17 03:35:21 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2012-04-17 03:35:21 +0200
commit4643b05662966a615845803c7bc89c5a5e77d6d5 (patch)
tree0ef389769c2b5f50f3ab34e6e53346b140817798 /arch/x86/lib
parentMerge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost (diff)
parentx86: Handle failures of parsing immediate operands in the instruction decoder (diff)
downloadlinux-4643b05662966a615845803c7bc89c5a5e77d6d5.tar.xz
linux-4643b05662966a615845803c7bc89c5a5e77d6d5.zip
Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf fixes from Ingo Molnar. * 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86: Handle failures of parsing immediate operands in the instruction decoder perf archive: Correct cutting of symbolic link perf tools: Ignore auto-generated bison/flex files perf tools: Fix parsers' rules to dependencies perf tools: fix NO_GTK2 Makefile config error perf session: Skip event correctly for unknown id/machine
Diffstat (limited to 'arch/x86/lib')
-rw-r--r--arch/x86/lib/insn.c53
1 files changed, 36 insertions, 17 deletions
diff --git a/arch/x86/lib/insn.c b/arch/x86/lib/insn.c
index 25feb1ae71c5..b1e6c4b2e8eb 100644
--- a/arch/x86/lib/insn.c
+++ b/arch/x86/lib/insn.c
@@ -379,8 +379,8 @@ err_out:
return;
}
-/* Decode moffset16/32/64 */
-static void __get_moffset(struct insn *insn)
+/* Decode moffset16/32/64. Return 0 if failed */
+static int __get_moffset(struct insn *insn)
{
switch (insn->addr_bytes) {
case 2:
@@ -397,15 +397,19 @@ static void __get_moffset(struct insn *insn)
insn->moffset2.value = get_next(int, insn);
insn->moffset2.nbytes = 4;
break;
+ default: /* opnd_bytes must be modified manually */
+ goto err_out;
}
insn->moffset1.got = insn->moffset2.got = 1;
+ return 1;
+
err_out:
- return;
+ return 0;
}
-/* Decode imm v32(Iz) */
-static void __get_immv32(struct insn *insn)
+/* Decode imm v32(Iz). Return 0 if failed */
+static int __get_immv32(struct insn *insn)
{
switch (insn->opnd_bytes) {
case 2:
@@ -417,14 +421,18 @@ static void __get_immv32(struct insn *insn)
insn->immediate.value = get_next(int, insn);
insn->immediate.nbytes = 4;
break;
+ default: /* opnd_bytes must be modified manually */
+ goto err_out;
}
+ return 1;
+
err_out:
- return;
+ return 0;
}
-/* Decode imm v64(Iv/Ov) */
-static void __get_immv(struct insn *insn)
+/* Decode imm v64(Iv/Ov), Return 0 if failed */
+static int __get_immv(struct insn *insn)
{
switch (insn->opnd_bytes) {
case 2:
@@ -441,15 +449,18 @@ static void __get_immv(struct insn *insn)
insn->immediate2.value = get_next(int, insn);
insn->immediate2.nbytes = 4;
break;
+ default: /* opnd_bytes must be modified manually */
+ goto err_out;
}
insn->immediate1.got = insn->immediate2.got = 1;
+ return 1;
err_out:
- return;
+ return 0;
}
/* Decode ptr16:16/32(Ap) */
-static void __get_immptr(struct insn *insn)
+static int __get_immptr(struct insn *insn)
{
switch (insn->opnd_bytes) {
case 2:
@@ -462,14 +473,17 @@ static void __get_immptr(struct insn *insn)
break;
case 8:
/* ptr16:64 is not exist (no segment) */
- return;
+ return 0;
+ default: /* opnd_bytes must be modified manually */
+ goto err_out;
}
insn->immediate2.value = get_next(unsigned short, insn);
insn->immediate2.nbytes = 2;
insn->immediate1.got = insn->immediate2.got = 1;
+ return 1;
err_out:
- return;
+ return 0;
}
/**
@@ -489,7 +503,8 @@ void insn_get_immediate(struct insn *insn)
insn_get_displacement(insn);
if (inat_has_moffset(insn->attr)) {
- __get_moffset(insn);
+ if (!__get_moffset(insn))
+ goto err_out;
goto done;
}
@@ -517,16 +532,20 @@ void insn_get_immediate(struct insn *insn)
insn->immediate2.nbytes = 4;
break;
case INAT_IMM_PTR:
- __get_immptr(insn);
+ if (!__get_immptr(insn))
+ goto err_out;
break;
case INAT_IMM_VWORD32:
- __get_immv32(insn);
+ if (!__get_immv32(insn))
+ goto err_out;
break;
case INAT_IMM_VWORD:
- __get_immv(insn);
+ if (!__get_immv(insn))
+ goto err_out;
break;
default:
- break;
+ /* Here, insn must have an immediate, but failed */
+ goto err_out;
}
if (inat_has_second_immediate(insn->attr)) {
insn->immediate2.value = get_next(char, insn);