Merge tag 'block-5.9-2020-08-14' of git://git.kernel.dk/linux-block

[linux/fpc-iii.git] / tools / perf / arch / arm / annotate / instructions.c

// SPDX-License-Identifier: GPL-2.0
#include <linux/compiler.h>
#include <linux/zalloc.h>
#include <sys/types.h>
#include <regex.h>
#include <stdlib.h>

struct arm_annotate {
        regex_t call_insn,
                jump_insn;
};

static struct ins_ops *arm__associate_instruction_ops(struct arch *arch, const char *name)
{
        struct arm_annotate *arm = arch->priv;
        struct ins_ops *ops;
        regmatch_t match[2];

        if (!regexec(&arm->call_insn, name, 2, match, 0))
                ops = &call_ops;
        else if (!regexec(&arm->jump_insn, name, 2, match, 0))
                ops = &jump_ops;
        else
                return NULL;

        arch__associate_ins_ops(arch, name, ops);
        return ops;
}

static int arm__annotate_init(struct arch *arch, char *cpuid __maybe_unused)
{
        struct arm_annotate *arm;
        int err;

        if (arch->initialized)
                return 0;

        arm = zalloc(sizeof(*arm));
        if (!arm)
                return ENOMEM;

#define ARM_CONDS "(cc|cs|eq|ge|gt|hi|le|ls|lt|mi|ne|pl|vc|vs)"
        err = regcomp(&arm->call_insn, "^blx?" ARM_CONDS "?$", REG_EXTENDED);
        if (err)
                goto out_free_arm;
        err = regcomp(&arm->jump_insn, "^bx?" ARM_CONDS "?$", REG_EXTENDED);
        if (err)
                goto out_free_call;
#undef ARM_CONDS

        arch->initialized = true;
        arch->priv        = arm;
        arch->associate_instruction_ops   = arm__associate_instruction_ops;
        arch->objdump.comment_char        = ';';
        arch->objdump.skip_functions_char = '+';
        return 0;

out_free_call:
        regfree(&arm->call_insn);
out_free_arm:
        free(arm);
        return SYMBOL_ANNOTATE_ERRNO__ARCH_INIT_REGEXP;
}