mirrors/linux
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2025-01-24 17:23:25 -05:00
Code Activity

perf tools arm64: Add support for generating bpf prologue

Browse source 
Since HAVE_KPROBES can be enabled in arm64, this patch introduces
regs_query_register_offset() to convert register name to offset for
arm64, so the BPF prologue feature is ready to use.

Signed-off-by: He Kuang <hekuang@huawei.com>
Reviewed-by: Will Deacon <will.deacon@arm.com>
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Bintian Wang <bintian.wang@huawei.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Wang Nan <wangnan0@huawei.com>
Cc: linux-arm-kernel@lists.infradead.org
Link: http://lkml.kernel.org/r/20170207073412.26983-1-hekuang@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
He Kuang 2017-02-07 07:34:11 +00:00 • committed by Arnaldo Carvalho de Melo
parent e06094ab67
commit 3bb53c9f12
2 changed files with 15 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

1
tools/perf/arch/arm64/Makefile
View file

@ -2,3 +2,4 @@ ifndef NO_DWARF
PERF_HAVE_DWARF_REGS := 1 PERF_HAVE_DWARF_REGS := 1
endif endif
PERF_HAVE_JITDUMP := 1 PERF_HAVE_JITDUMP := 1
PERF_HAVE_ARCH_REGS_QUERY_REGISTER_OFFSET := 1

15
tools/perf/arch/arm64/util/dwarf-regs.c
View file

@ -10,17 +10,20 @@
#include <stddef.h> #include <stddef.h>
#include <dwarf-regs.h> #include <dwarf-regs.h>
#include <linux/ptrace.h> /* for struct user_pt_regs */
#include "util.h"
struct pt_regs_dwarfnum { struct pt_regs_dwarfnum {
const char *name; const char *name;
unsigned int dwarfnum; unsigned int dwarfnum;
}; };
#define STR(s) #s
#define REG_DWARFNUM_NAME(r, num) {.name = r, .dwarfnum = num} #define REG_DWARFNUM_NAME(r, num) {.name = r, .dwarfnum = num}
#define GPR_DWARFNUM_NAME(num) \ #define GPR_DWARFNUM_NAME(num) \
{.name = STR(%x##num), .dwarfnum = num} {.name = STR(%x##num), .dwarfnum = num}
#define REG_DWARFNUM_END {.name = NULL, .dwarfnum = 0} #define REG_DWARFNUM_END {.name = NULL, .dwarfnum = 0}
#define DWARFNUM2OFFSET(index) \
(index * sizeof((struct user_pt_regs *)0)->regs[0])
/* /*
* Reference: * Reference:
@ -78,3 +81,13 @@ const char *get_arch_regstr(unsigned int n)
return roff->name; return roff->name;
return NULL; return NULL;
} }
int regs_query_register_offset(const char *name)
{
const struct pt_regs_dwarfnum *roff;
for (roff = regdwarfnum_table; roff->name != NULL; roff++)
if (!strcmp(roff->name, name))
return DWARFNUM2OFFSET(roff->dwarfnum);
return -EINVAL;
}