perf annotate: Disassembler instruction parsing

So that at disassembly time we parse targets, etc.

Supporting jump instructions initially, call functions are next.

Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-7vzlh66n5or46n27ji658cnl@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2012-04-18 13:58:34 -03:00
parent 657bcaf509
commit 4f9d03251b
3 changed files with 79 additions and 16 deletions

View File

@ -315,26 +315,13 @@ struct disasm_line *annotate_browser__find_offset(struct annotate_browser *brows
static bool annotate_browser__jump(struct annotate_browser *browser)
{
const char *jumps[] = { "je", "jne", "ja", "jmpq", "js", "jmp", NULL };
struct disasm_line *dl = browser->selection;
s64 idx, offset;
char *s;
int i = 0;
s64 idx;
while (jumps[i] && strcmp(dl->name, jumps[i]))
++i;
if (jumps[i] == NULL)
if (!dl->ins || !ins__is_jump(dl->ins))
return false;
s = strchr(dl->operands, '+');
if (s++ == NULL) {
ui_helpline__puts("Invallid jump instruction.");
return true;
}
offset = strtoll(s, NULL, 16);
dl = annotate_browser__find_offset(browser, offset, &idx);
dl = annotate_browser__find_offset(browser, dl->target, &idx);
if (dl == NULL) {
ui_helpline__puts("Invallid jump offset");
return true;

View File

@ -18,6 +18,53 @@
const char *disassembler_style;
static int jump_ops__parse_target(const char *operands, u64 *target)
{
const char *s = strchr(operands, '+');
if (s++ == NULL)
return -1;
*target = strtoll(s, NULL, 16);
return 0;
}
static struct ins_ops jump_ops = {
.parse_target = jump_ops__parse_target,
};
bool ins__is_jump(const struct ins *ins)
{
return ins->ops == &jump_ops;
}
/*
* Must be sorted by name!
*/
static struct ins instructions[] = {
{ .name = "ja", .ops = &jump_ops, },
{ .name = "je", .ops = &jump_ops, },
{ .name = "jmp", .ops = &jump_ops, },
{ .name = "jmpq", .ops = &jump_ops, },
{ .name = "jne", .ops = &jump_ops, },
{ .name = "js", .ops = &jump_ops, },
};
static int ins__cmp(const void *name, const void *insp)
{
const struct ins *ins = insp;
return strcmp(name, ins->name);
}
static struct ins *ins__find(const char *name)
{
const int nmemb = ARRAY_SIZE(instructions);
return bsearch(name, instructions, nmemb, sizeof(struct ins), ins__cmp);
}
int symbol__annotate_init(struct map *map __used, struct symbol *sym)
{
struct annotation *notes = symbol__annotation(sym);
@ -78,6 +125,20 @@ int symbol__inc_addr_samples(struct symbol *sym, struct map *map,
return 0;
}
static void disasm_line__init_ins(struct disasm_line *dl)
{
dl->ins = ins__find(dl->name);
if (dl->ins == NULL)
return;
if (!dl->ins->ops)
return;
if (dl->ins->ops->parse_target)
dl->ins->ops->parse_target(dl->operands, &dl->target);
}
static struct disasm_line *disasm_line__new(s64 offset, char *line, size_t privsize)
{
struct disasm_line *dl = zalloc(sizeof(*dl) + privsize);
@ -117,6 +178,8 @@ static struct disasm_line *disasm_line__new(s64 offset, char *line, size_t privs
while (isspace(dl->operands[0]))
++dl->operands;
}
disasm_line__init_ins(dl);
}
}

View File

@ -7,11 +7,24 @@
#include <linux/list.h>
#include <linux/rbtree.h>
struct ins_ops {
int (*parse_target)(const char *operands, u64 *target);
};
struct ins {
const char *name;
struct ins_ops *ops;
};
bool ins__is_jump(const struct ins *ins);
struct disasm_line {
struct list_head node;
s64 offset;
u64 target;
char *line;
char *name;
struct ins *ins;
char *operands;
};