// SPDX-License-Identifier: GPL-2.0
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#include <linux/compiler.h>
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#include <sys/types.h>
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#include <regex.h>
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#include <stdlib.h>
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struct arm64_annotate {
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regex_t call_insn,
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jump_insn;
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};
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static int arm64_mov__parse(struct arch *arch __maybe_unused,
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struct ins_operands *ops,
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struct map_symbol *ms __maybe_unused)
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{
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char *s = strchr(ops->raw, ','), *target, *endptr;
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if (s == NULL)
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return -1;
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*s = '\0';
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ops->source.raw = strdup(ops->raw);
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*s = ',';
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if (ops->source.raw == NULL)
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return -1;
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target = ++s;
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ops->target.raw = strdup(target);
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if (ops->target.raw == NULL)
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goto out_free_source;
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ops->target.addr = strtoull(target, &endptr, 16);
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if (endptr == target)
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goto out_free_target;
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s = strchr(endptr, '<');
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if (s == NULL)
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goto out_free_target;
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endptr = strchr(s + 1, '>');
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if (endptr == NULL)
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goto out_free_target;
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*endptr = '\0';
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*s = ' ';
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ops->target.name = strdup(s);
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*s = '<';
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*endptr = '>';
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if (ops->target.name == NULL)
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goto out_free_target;
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return 0;
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out_free_target:
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zfree(&ops->target.raw);
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out_free_source:
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zfree(&ops->source.raw);
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return -1;
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}
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static int mov__scnprintf(struct ins *ins, char *bf, size_t size,
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struct ins_operands *ops, int max_ins_name);
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static struct ins_ops arm64_mov_ops = {
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.parse = arm64_mov__parse,
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.scnprintf = mov__scnprintf,
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};
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static struct ins_ops *arm64__associate_instruction_ops(struct arch *arch, const char *name)
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{
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struct arm64_annotate *arm = arch->priv;
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struct ins_ops *ops;
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regmatch_t match[2];
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if (!regexec(&arm->jump_insn, name, 2, match, 0))
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ops = &jump_ops;
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else if (!regexec(&arm->call_insn, name, 2, match, 0))
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ops = &call_ops;
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else if (!strcmp(name, "ret"))
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ops = &ret_ops;
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else
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ops = &arm64_mov_ops;
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arch__associate_ins_ops(arch, name, ops);
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return ops;
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}
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static int arm64__annotate_init(struct arch *arch, char *cpuid __maybe_unused)
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{
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struct arm64_annotate *arm;
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int err;
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if (arch->initialized)
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return 0;
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arm = zalloc(sizeof(*arm));
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if (!arm)
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return ENOMEM;
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/* bl, blr */
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err = regcomp(&arm->call_insn, "^blr?$", REG_EXTENDED);
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if (err)
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goto out_free_arm;
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/* b, b.cond, br, cbz/cbnz, tbz/tbnz */
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err = regcomp(&arm->jump_insn, "^[ct]?br?\\.?(cc|cs|eq|ge|gt|hi|le|ls|lt|mi|ne|pl)?n?z?$",
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REG_EXTENDED);
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if (err)
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goto out_free_call;
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arch->initialized = true;
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arch->priv = arm;
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arch->associate_instruction_ops = arm64__associate_instruction_ops;
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arch->objdump.comment_char = '/';
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arch->objdump.skip_functions_char = '+';
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return 0;
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out_free_call:
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regfree(&arm->call_insn);
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out_free_arm:
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free(arm);
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return SYMBOL_ANNOTATE_ERRNO__ARCH_INIT_REGEXP;
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}
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