Commit-ID: 4679bccaa30893ccc5be35c5c5d44f5ab60c0a08
Gitweb: http://git.kernel.org/tip/4679bccaa30893ccc5be35c5c5d44f5ab60c0a08
Author: Naveen N. Rao <naveen.n.rao@xxxxxxxxxxxxxxxxxx>
AuthorDate: Thu, 5 May 2016 20:53:19 +0530
Committer: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Thu, 5 May 2016 21:03:58 -0300
perf tools powerpc: Add support for generating bpf prologue
Generalize existing macros to serve the purpose.
Signed-off-by: Naveen N. Rao <naveen.n.rao@xxxxxxxxxxxxxxxxxx>
Cc: Ian Munsie <imunsie@xxxxxxxxxxx>
Cc: Masami Hiramatsu <mhiramat@xxxxxxxxxx>
Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Cc: Wang Nan <wangnan0@xxxxxxxxxx>
Cc: linuxppc-dev@xxxxxxxxxxxxxxxx
Link: http://lkml.kernel.org/r/1462461799-17518-1-git-send-email-naveen.n.rao@xxxxxxxxxxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
tools/perf/arch/powerpc/Makefile | 1 +
tools/perf/arch/powerpc/util/dwarf-regs.c | 40 +++++++++++++++++++++----------
2 files changed, 29 insertions(+), 12 deletions(-)
diff --git a/tools/perf/arch/powerpc/Makefile b/tools/perf/arch/powerpc/Makefile
index 56e05f1..cc39309 100644
--- a/tools/perf/arch/powerpc/Makefile
+++ b/tools/perf/arch/powerpc/Makefile
@@ -3,4 +3,5 @@ PERF_HAVE_DWARF_REGS := 1
endif
HAVE_KVM_STAT_SUPPORT := 1
+PERF_HAVE_ARCH_REGS_QUERY_REGISTER_OFFSET := 1
PERF_HAVE_JITDUMP := 1
diff --git a/tools/perf/arch/powerpc/util/dwarf-regs.c b/tools/perf/arch/powerpc/util/dwarf-regs.c
index 733151c..41bdf95 100644
--- a/tools/perf/arch/powerpc/util/dwarf-regs.c
+++ b/tools/perf/arch/powerpc/util/dwarf-regs.c
@@ -10,19 +10,26 @@
*/
#include <stddef.h>
+#include <errno.h>
+#include <string.h>
#include <dwarf-regs.h>
-
+#include <linux/ptrace.h>
+#include <linux/kernel.h>
+#include "util.h"
struct pt_regs_dwarfnum {
const char *name;
unsigned int dwarfnum;
+ unsigned int ptregs_offset;
};
-#define STR(s) #s
-#define REG_DWARFNUM_NAME(r, num) {.name = r, .dwarfnum = num}
-#define GPR_DWARFNUM_NAME(num) \
- {.name = STR(%gpr##num), .dwarfnum = num}
-#define REG_DWARFNUM_END {.name = NULL, .dwarfnum = 0}
+#define REG_DWARFNUM_NAME(r, num) \
+ {.name = STR(%)STR(r), .dwarfnum = num, \
+ .ptregs_offset = offsetof(struct pt_regs, r)}
+#define GPR_DWARFNUM_NAME(num) \
+ {.name = STR(%gpr##num), .dwarfnum = num, \
+ .ptregs_offset = offsetof(struct pt_regs, gpr[num])}
+#define REG_DWARFNUM_END {.name = NULL, .dwarfnum = 0, .ptregs_offset = 0}
/*
* Reference:
@@ -61,12 +68,12 @@ static const struct pt_regs_dwarfnum regdwarfnum_table[] = {
GPR_DWARFNUM_NAME(29),
GPR_DWARFNUM_NAME(30),
GPR_DWARFNUM_NAME(31),
- REG_DWARFNUM_NAME("%msr", 66),
- REG_DWARFNUM_NAME("%ctr", 109),
- REG_DWARFNUM_NAME("%link", 108),
- REG_DWARFNUM_NAME("%xer", 101),
- REG_DWARFNUM_NAME("%dar", 119),
- REG_DWARFNUM_NAME("%dsisr", 118),
+ REG_DWARFNUM_NAME(msr, 66),
+ REG_DWARFNUM_NAME(ctr, 109),
+ REG_DWARFNUM_NAME(link, 108),
+ REG_DWARFNUM_NAME(xer, 101),
+ REG_DWARFNUM_NAME(dar, 119),
+ REG_DWARFNUM_NAME(dsisr, 118),
REG_DWARFNUM_END,
};
@@ -86,3 +93,12 @@ const char *get_arch_regstr(unsigned int n)
return roff->name;
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 roff->ptregs_offset;
+ return -EINVAL;
+}
--
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