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Message-ID: <20160826062147.GC8218@danjae.aot.lge.com>
Date: Fri, 26 Aug 2016 15:21:47 +0900
From: Namhyung Kim <namhyung@...nel.org>
To: Kim Phillips <kim.phillips@....com>
Cc: Ravi Bangoria <ravi.bangoria@...ux.vnet.ibm.com>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
linuxppc-dev@...ts.ozlabs.org,
Arnaldo Carvalho de Melo <acme@...nel.org>,
Peter Zijlstra <peterz@...radead.org>,
Ingo Molnar <mingo@...hat.com>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
Taeung Song <treeze.taeung@...il.com>,
"Naveen N. Rao" <naveen.n.rao@...ux.vnet.ibm.com>,
markus@...ppelsdorf.de, chris.ryder@....com,
Pawel Moll <pawel.moll@....com>,
Masami Hiramatsu <mhiramat@...nel.org>,
rmk+kernel@....linux.org.uk, Jiri Olsa <jolsa@...nel.org>,
Michael Ellerman <mpe@...erman.id.au>,
Hemant Kumar <hemant@...ux.vnet.ibm.com>
Subject: Re: [PATCH v6 2/7] perf annotate: Add cross arch annotate support
Hi,
On Tue, Aug 23, 2016 at 03:36:17PM -0500, Kim Phillips wrote:
> On Tue, 23 Aug 2016 11:17:16 +0900
> Namhyung Kim <namhyung@...nel.org> wrote:
>
> > On Tue, Aug 23, 2016 at 8:01 AM, Kim Phillips <kim.phillips@....com> wrote:
> > > On Fri, 19 Aug 2016 18:29:33 +0530
> > > Ravi Bangoria <ravi.bangoria@...ux.vnet.ibm.com> wrote:
> > >
> > >> Changes in v6:
> > >> - Instead of adding only those instructions defined in #ifdef __arm__,
> > >> add all instructions from default table to arm table.
> > > Thanks, I've gone through the list and removed all not-ARM
> > > instructions, and added some missing ARM branch instructions:
> >
> > Can we use regex patterns instead?
>
> Yes, that helps prevent mistakes updating instruction lists - how does
> this look?:
Much better!
Thanks,
Namhyung
>
> diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
> index b2c6cf3..52316f3 100644
> --- a/tools/perf/util/annotate.c
> +++ b/tools/perf/util/annotate.c
> @@ -26,6 +26,7 @@
> const char *disassembler_style;
> const char *objdump_path;
> static regex_t file_lineno;
> +static regex_t arm_call_insn, arm_jump_insn;
>
> static struct ins *ins__find(const char *name, const char *norm_arch);
> static int disasm_line__parse(char *line, char **namep, char **rawp);
> @@ -449,98 +450,7 @@ static struct ins instructions_x86[] = {
> { .name = "retq", .ops = &ret_ops, },
> };
>
> -static struct ins instructions_arm[] = {
> - { .name = "add", .ops = &mov_ops, },
> - { .name = "addl", .ops = &mov_ops, },
> - { .name = "addq", .ops = &mov_ops, },
> - { .name = "addw", .ops = &mov_ops, },
> - { .name = "and", .ops = &mov_ops, },
> - { .name = "b", .ops = &jump_ops, }, /* might also be a call */
> - { .name = "bcc", .ops = &jump_ops, },
> - { .name = "bcs", .ops = &jump_ops, },
> - { .name = "beq", .ops = &jump_ops, },
> - { .name = "bge", .ops = &jump_ops, },
> - { .name = "bgt", .ops = &jump_ops, },
> - { .name = "bhi", .ops = &jump_ops, },
> - { .name = "bl", .ops = &call_ops, },
> - { .name = "bls", .ops = &jump_ops, },
> - { .name = "blt", .ops = &jump_ops, },
> - { .name = "blx", .ops = &call_ops, },
> - { .name = "bne", .ops = &jump_ops, },
> - { .name = "bts", .ops = &mov_ops, },
> - { .name = "call", .ops = &call_ops, },
> - { .name = "callq", .ops = &call_ops, },
> - { .name = "cmp", .ops = &mov_ops, },
> - { .name = "cmpb", .ops = &mov_ops, },
> - { .name = "cmpl", .ops = &mov_ops, },
> - { .name = "cmpq", .ops = &mov_ops, },
> - { .name = "cmpw", .ops = &mov_ops, },
> - { .name = "cmpxch", .ops = &mov_ops, },
> - { .name = "dec", .ops = &dec_ops, },
> - { .name = "decl", .ops = &dec_ops, },
> - { .name = "imul", .ops = &mov_ops, },
> - { .name = "inc", .ops = &dec_ops, },
> - { .name = "incl", .ops = &dec_ops, },
> - { .name = "ja", .ops = &jump_ops, },
> - { .name = "jae", .ops = &jump_ops, },
> - { .name = "jb", .ops = &jump_ops, },
> - { .name = "jbe", .ops = &jump_ops, },
> - { .name = "jc", .ops = &jump_ops, },
> - { .name = "jcxz", .ops = &jump_ops, },
> - { .name = "je", .ops = &jump_ops, },
> - { .name = "jecxz", .ops = &jump_ops, },
> - { .name = "jg", .ops = &jump_ops, },
> - { .name = "jge", .ops = &jump_ops, },
> - { .name = "jl", .ops = &jump_ops, },
> - { .name = "jle", .ops = &jump_ops, },
> - { .name = "jmp", .ops = &jump_ops, },
> - { .name = "jmpq", .ops = &jump_ops, },
> - { .name = "jna", .ops = &jump_ops, },
> - { .name = "jnae", .ops = &jump_ops, },
> - { .name = "jnb", .ops = &jump_ops, },
> - { .name = "jnbe", .ops = &jump_ops, },
> - { .name = "jnc", .ops = &jump_ops, },
> - { .name = "jne", .ops = &jump_ops, },
> - { .name = "jng", .ops = &jump_ops, },
> - { .name = "jnge", .ops = &jump_ops, },
> - { .name = "jnl", .ops = &jump_ops, },
> - { .name = "jnle", .ops = &jump_ops, },
> - { .name = "jno", .ops = &jump_ops, },
> - { .name = "jnp", .ops = &jump_ops, },
> - { .name = "jns", .ops = &jump_ops, },
> - { .name = "jnz", .ops = &jump_ops, },
> - { .name = "jo", .ops = &jump_ops, },
> - { .name = "jp", .ops = &jump_ops, },
> - { .name = "jpe", .ops = &jump_ops, },
> - { .name = "jpo", .ops = &jump_ops, },
> - { .name = "jrcxz", .ops = &jump_ops, },
> - { .name = "js", .ops = &jump_ops, },
> - { .name = "jz", .ops = &jump_ops, },
> - { .name = "lea", .ops = &mov_ops, },
> - { .name = "lock", .ops = &lock_ops, },
> - { .name = "mov", .ops = &mov_ops, },
> - { .name = "movb", .ops = &mov_ops, },
> - { .name = "movdqa",.ops = &mov_ops, },
> - { .name = "movl", .ops = &mov_ops, },
> - { .name = "movq", .ops = &mov_ops, },
> - { .name = "movslq", .ops = &mov_ops, },
> - { .name = "movzbl", .ops = &mov_ops, },
> - { .name = "movzwl", .ops = &mov_ops, },
> - { .name = "nop", .ops = &nop_ops, },
> - { .name = "nopl", .ops = &nop_ops, },
> - { .name = "nopw", .ops = &nop_ops, },
> - { .name = "or", .ops = &mov_ops, },
> - { .name = "orl", .ops = &mov_ops, },
> - { .name = "test", .ops = &mov_ops, },
> - { .name = "testb", .ops = &mov_ops, },
> - { .name = "testl", .ops = &mov_ops, },
> - { .name = "xadd", .ops = &mov_ops, },
> - { .name = "xbeginl", .ops = &jump_ops, },
> - { .name = "xbeginq", .ops = &jump_ops, },
> - { .name = "retq", .ops = &ret_ops, },
> -};
> -
> -struct instructions_powerpc {
> +struct instructions_arch {
> struct ins *ins;
> struct list_head list;
> };
> @@ -560,41 +470,41 @@ static int ins__cmp(const void *a, const void *b)
> return strcmp(ia->name, ib->name);
> }
>
> -static struct ins *list_add__ins_powerpc(struct instructions_powerpc *head,
> +static struct ins *list_add__ins_arch(struct instructions_arch *head,
> const char *name, struct ins_ops *ops)
> {
> - struct instructions_powerpc *ins_powerpc;
> + struct instructions_arch *ins_arch;
> struct ins *ins;
>
> ins = zalloc(sizeof(struct ins));
> if (!ins)
> return NULL;
>
> - ins_powerpc = zalloc(sizeof(struct instructions_powerpc));
> - if (!ins_powerpc)
> + ins_arch = zalloc(sizeof(struct instructions_arch));
> + if (!ins_arch)
> goto out_free_ins;
>
> ins->name = strdup(name);
> if (!ins->name)
> - goto out_free_ins_power;
> + goto out_free_ins_arch;
>
> ins->ops = ops;
> - ins_powerpc->ins = ins;
> - list_add_tail(&(ins_powerpc->list), &(head->list));
> + ins_arch->ins = ins;
> + list_add_tail(&(ins_arch->list), &(head->list));
>
> return ins;
>
> -out_free_ins_power:
> - zfree(&ins_powerpc);
> +out_free_ins_arch:
> + zfree(&ins_arch);
> out_free_ins:
> zfree(&ins);
> return NULL;
> }
>
> -static struct ins *list_search__ins_powerpc(struct instructions_powerpc *head,
> +static struct ins *list_search__ins_arch(struct instructions_arch *head,
> const char *name)
> {
> - struct instructions_powerpc *pos;
> + struct instructions_arch *pos;
>
> list_for_each_entry(pos, &head->list, list) {
> if (!strcmp(pos->ins->name, name))
> @@ -608,7 +518,7 @@ static struct ins *ins__find_powerpc(const char *name)
> int i;
> struct ins *ins;
> struct ins_ops *ops;
> - static struct instructions_powerpc head;
> + static struct instructions_arch head;
> static bool list_initialized;
>
> /*
> @@ -629,7 +539,7 @@ static struct ins *ins__find_powerpc(const char *name)
> /*
> * Return if we already have object of 'struct ins' for this instruction
> */
> - ins = list_search__ins_powerpc(&head, name);
> + ins = list_search__ins_arch(&head, name);
> if (ins)
> return ins;
>
> @@ -666,7 +576,44 @@ static struct ins *ins__find_powerpc(const char *name)
> * Add instruction to list so next time no need to
> * allocate memory for it.
> */
> - return list_add__ins_powerpc(&head, name, ops);
> + return list_add__ins_arch(&head, name, ops);
> +}
> +
> +static struct ins *ins__find_arm(const char *name)
> +{
> + struct ins *ins;
> + struct ins_ops *ops = &mov_ops;
> + static struct instructions_arch head;
> + static bool list_initialized;
> + regmatch_t match[2];
> + int ret;
> +
> + if (!list_initialized) {
> + INIT_LIST_HEAD(&head.list);
> + list_initialized = true;
> + }
> +
> + /*
> + * Return if we already have object of 'struct ins' for this instruction
> + */
> + ins = list_search__ins_arch(&head, name);
> + if (ins)
> + return ins;
> +
> + ret = regexec(&arm_call_insn, name, 2, match, 0);
> + if (!ret) {
> + ops = &call_ops;
> + } else {
> + ret = regexec(&arm_jump_insn, name, 2, match, 0);
> + if (!ret)
> + ops = &jump_ops;
> + }
> +
> + /*
> + * Add instruction to list so next time no need to
> + * allocate memory for it.
> + */
> + return list_add__ins_arch(&head, name, ops);
> }
>
> static void ins__sort(struct ins *instructions, int nmemb)
> @@ -686,15 +633,26 @@ static const char *annotate__norm_arch(char *arch)
> return normalize_arch(arch);
> }
>
> +#define ARM_CONDS "(cc|cs|eq|ge|gt|hi|le|ls|lt|mi|ne|pl|vc|vs)"
> +
> static struct ins *ins__find(const char *name, const char *norm_arch)
> {
> static bool sorted;
> struct ins *instructions;
> - int nmemb;
> + int nmemb, ret;
>
> if (!sorted) {
> ins__sort(instructions_x86, ARRAY_SIZE(instructions_x86));
> - ins__sort(instructions_arm, ARRAY_SIZE(instructions_arm));
> + if (!strcmp(norm_arch, NORM_ARM)) {
> + ret = regcomp(&arm_call_insn,
> + "^blx?" ARM_CONDS "?$", REG_EXTENDED);
> + ret |= regcomp(&arm_jump_insn,
> + "^bx?" ARM_CONDS "?$", REG_EXTENDED);
> + if (ret) {
> + pr_err("regcomp failed\n");
> + return NULL;
> + }
> + }
> sorted = true;
> }
>
> @@ -702,8 +660,7 @@ static struct ins *ins__find(const char *name, const char *norm_arch)
> instructions = instructions_x86;
> nmemb = ARRAY_SIZE(instructions_x86);
> } else if (!strcmp(norm_arch, NORM_ARM)) {
> - instructions = instructions_arm;
> - nmemb = ARRAY_SIZE(instructions_arm);
> + return ins__find_arm(name);
> } else if (!strcmp(norm_arch, NORM_POWERPC)) {
> return ins__find_powerpc(name);
> } else {
>
> Note that, for ARM, in order to match return instructions, 'lr' must be
> found to be the operand of the branch instruction, which is not
> contained in the 'name' variable passed to ins__find().
>
> Kim
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