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Commit 4679bcca authored by Naveen N. Rao's avatar Naveen N. Rao Committed by Arnaldo Carvalho de Melo
Browse files

perf tools powerpc: Add support for generating bpf prologue 



Generalize existing macros to serve the purpose.

Signed-off-by: default avatarNaveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Cc: Ian Munsie <imunsie@au1.ibm.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Wang Nan <wangnan0@huawei.com>
Cc: linuxppc-dev@lists.ozlabs.org
Link: http://lkml.kernel.org/r/1462461799-17518-1-git-send-email-naveen.n.rao@linux.vnet.ibm.com


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 03548ebf

tools/perf/arch/powerpc/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -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

tools/perf/arch/powerpc/util/dwarf-regs.c

+28 −12
Original line number Diff line number Diff line
@@ -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 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}

#define REG_DWARFNUM_END {.name = NULL, .dwarfnum = 0}

		{.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;

}