Commit b13bbeee authored by Kim Phillips's avatar Kim Phillips Committed by Arnaldo Carvalho de Melo

perf annotate: Fix branch instruction with multiple operands

'perf annotate' is dropping the cr* fields from branch instructions.

Fix it by adding support to display branch instructions having
multiple operands.

Power Arch objdump of int_sqrt:

 20.36 | c0000000004d2694:   subf   r10,r10,r3
       | c0000000004d2698: v bgt    cr6,c0000000004d26a0 <int_sqrt+0x40>
  1.82 | c0000000004d269c:   mr     r3,r10
 29.18 | c0000000004d26a0:   mr     r10,r8
       | c0000000004d26a4: v bgt    cr7,c0000000004d26ac <int_sqrt+0x4c>
       | c0000000004d26a8:   mr     r10,r7

Power Arch Before Patch:

 20.36 |       subf   r10,r10,r3
       |     v bgt    40
  1.82 |       mr     r3,r10
 29.18 | 40:   mr     r10,r8
       |     v bgt    4c
       |       mr     r10,r7

Power Arch After patch:

 20.36 |       subf   r10,r10,r3
       |     v bgt    cr6,40
  1.82 |       mr     r3,r10
 29.18 | 40:   mr     r10,r8
       |     v bgt    cr7,4c
       |       mr     r10,r7

Also support AArch64 conditional branch instructions, which can
have up to three operands:

Aarch64 Non-simplified (raw objdump) view:

       │ffff0000083cd11c: ↑ cbz    w0, ffff0000083cd100 <security_fil▒
...
  4.44 │ffff000│083cd134: ↓ tbnz   w0, #26, ffff0000083cd190 <securit▒
...
  1.37 │ffff000│083cd144: ↓ tbnz   w22, #5, ffff0000083cd1a4 <securit▒
       │ffff000│083cd148:   mov    w19, #0x20000                   //▒
  1.02 │ffff000│083cd14c: ↓ tbz    w22, #2, ffff0000083cd1ac <securit▒
...
  0.68 │ffff000└──3cd16c: ↑ cbnz   w0, ffff0000083cd120 <security_fil▒

Aarch64 Simplified, before this patch:

       │    ↑ cbz    40
...
  4.44 │   │↓ tbnz   w0, #26, ffff0000083cd190 <security_file_permiss▒
...
  1.37 │   │↓ tbnz   w22, #5, ffff0000083cd1a4 <security_file_permiss▒
       │   │  mov    w19, #0x20000                   // #131072
  1.02 │   │↓ tbz    w22, #2, ffff0000083cd1ac <security_file_permiss▒
...
  0.68 │   └──cbnz   60

the cbz operand is missing, and the tbz doesn't get simplified processing
at all because the parsing function failed to match an address.

Aarch64 Simplified, After this patch applied:

       │    ↑ cbz    w0, 40
...
  4.44 │   │↓ tbnz   w0, #26, d0
...
  1.37 │   │↓ tbnz   w22, #5, e4
       │   │  mov    w19, #0x20000                   // #131072
  1.02 │   │↓ tbz    w22, #2, ec
...
  0.68 │   └──cbnz   w0, 60
Originally-by: default avatarRavi Bangoria <ravi.bangoria@linux.vnet.ibm.com>
Tested-by: default avatarRavi Bangoria <ravi.bangoria@linux.vnet.ibm.com>
Reported-by: default avatarAnton Blanchard <anton@samba.org>
Reported-by: default avatarRobin Murphy <robin.murphy@arm.com>
Signed-off-by: default avatarKim Phillips <kim.phillips@arm.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Taeung Song <treeze.taeung@gmail.com>
Link: http://lkml.kernel.org/r/20170601092959.f60d98912e8a1b66fd1e4c0e@arm.comSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 54265664
...@@ -239,10 +239,20 @@ static int jump__parse(struct arch *arch __maybe_unused, struct ins_operands *op ...@@ -239,10 +239,20 @@ static int jump__parse(struct arch *arch __maybe_unused, struct ins_operands *op
const char *s = strchr(ops->raw, '+'); const char *s = strchr(ops->raw, '+');
const char *c = strchr(ops->raw, ','); const char *c = strchr(ops->raw, ',');
if (c++ != NULL) /*
* skip over possible up to 2 operands to get to address, e.g.:
* tbnz w0, #26, ffff0000083cd190 <security_file_permission+0xd0>
*/
if (c++ != NULL) {
ops->target.addr = strtoull(c, NULL, 16); ops->target.addr = strtoull(c, NULL, 16);
else if (!ops->target.addr) {
c = strchr(c, ',');
if (c++ != NULL)
ops->target.addr = strtoull(c, NULL, 16);
}
} else {
ops->target.addr = strtoull(ops->raw, NULL, 16); ops->target.addr = strtoull(ops->raw, NULL, 16);
}
if (s++ != NULL) { if (s++ != NULL) {
ops->target.offset = strtoull(s, NULL, 16); ops->target.offset = strtoull(s, NULL, 16);
...@@ -257,10 +267,27 @@ static int jump__parse(struct arch *arch __maybe_unused, struct ins_operands *op ...@@ -257,10 +267,27 @@ static int jump__parse(struct arch *arch __maybe_unused, struct ins_operands *op
static int jump__scnprintf(struct ins *ins, char *bf, size_t size, static int jump__scnprintf(struct ins *ins, char *bf, size_t size,
struct ins_operands *ops) struct ins_operands *ops)
{ {
const char *c = strchr(ops->raw, ',');
if (!ops->target.addr || ops->target.offset < 0) if (!ops->target.addr || ops->target.offset < 0)
return ins__raw_scnprintf(ins, bf, size, ops); return ins__raw_scnprintf(ins, bf, size, ops);
return scnprintf(bf, size, "%-6.6s %" PRIx64, ins->name, ops->target.offset); if (c != NULL) {
const char *c2 = strchr(c + 1, ',');
/* check for 3-op insn */
if (c2 != NULL)
c = c2;
c++;
/* mirror arch objdump's space-after-comma style */
if (*c == ' ')
c++;
}
return scnprintf(bf, size, "%-6.6s %.*s%" PRIx64,
ins->name, c ? c - ops->raw : 0, ops->raw,
ops->target.offset);
} }
static struct ins_ops jump_ops = { static struct ins_ops jump_ops = {
......
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