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// SPDX-License-Identifier: GPL-2.0
#include <linux/compiler.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <linux/zalloc.h>
#include <regex.h>
#include "../annotate.h"
#include "../disasm.h"
struct arch_arm64 {
struct arch arch;
regex_t call_insn;
regex_t jump_insn;
};
static int arm64_mov__parse(const struct arch *arch __maybe_unused,
struct ins_operands *ops,
struct map_symbol *ms __maybe_unused,
struct disasm_line *dl __maybe_unused)
{
char *s = strchr(ops->raw, ','), *target, *endptr;
if (s == NULL)
return -1;
*s = '\0';
ops->source.raw = strdup(ops->raw);
*s = ',';
if (ops->source.raw == NULL)
return -1;
target = ++s;
ops->target.raw = strdup(target);
if (ops->target.raw == NULL)
goto out_free_source;
ops->target.addr = strtoull(target, &endptr, 16);
if (endptr == target)
goto out_free_target;
s = strchr(endptr, '<');
if (s == NULL)
goto out_free_target;
endptr = strchr(s + 1, '>');
if (endptr == NULL)
goto out_free_target;
*endptr = '\0';
*s = ' ';
ops->target.name = strdup(s);
*s = '<';
*endptr = '>';
if (ops->target.name == NULL)
goto out_free_target;
return 0;
out_free_target:
zfree(&ops->target.raw);
out_free_source:
zfree(&ops->source.raw);
return -1;
}
static const struct ins_ops arm64_mov_ops = {
.parse = arm64_mov__parse,
.scnprintf = mov__scnprintf,
};
static const struct ins_ops *arm64__associate_instruction_ops(struct arch *arch, const char *name)
{
struct arch_arm64 *arm = container_of(arch, struct arch_arm64, arch);
const struct ins_ops *ops;
regmatch_t match[2];
if (!regexec(&arm->jump_insn, name, 2, match, 0))
ops = &jump_ops;
else if (!regexec(&arm->call_insn, name, 2, match, 0))
ops = &call_ops;
else if (!strcmp(name, "ret"))
ops = &ret_ops;
else
ops = &arm64_mov_ops;
arch__associate_ins_ops(arch, name, ops);
return ops;
}
const struct arch *arch__new_arm64(const struct e_machine_and_e_flags *id,
const char *cpuid __maybe_unused)
{
int err;
struct arch_arm64 *arm = zalloc(sizeof(*arm));
struct arch *arch;
if (!arm)
return NULL;
arch = &arm->arch;
arch->name = "arm64";
arch->id = *id;
arch->objdump.comment_char = '/';
arch->objdump.skip_functions_char = '+';
arch->associate_instruction_ops = arm64__associate_instruction_ops;
/* bl, blr */
err = regcomp(&arm->call_insn, "^blr?$", REG_EXTENDED);
if (err)
goto out_free_arm;
/* b, b.cond, br, cbz/cbnz, tbz/tbnz */
err = regcomp(&arm->jump_insn, "^[ct]?br?\\.?(cc|cs|eq|ge|gt|hi|hs|le|lo|ls|lt|mi|ne|pl|vc|vs)?n?z?$",
REG_EXTENDED);
if (err)
goto out_free_call;
return arch;
out_free_call:
regfree(&arm->call_insn);
out_free_arm:
free(arm);
errno = SYMBOL_ANNOTATE_ERRNO__ARCH_INIT_REGEXP;
return NULL;
}
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