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1 // SPDX-License-Identifier: GPL-2.0

2 #include <linux/compiler.h>

3 #include <sys/types.h>

4 #include <regex.h>

6 struct arm64_annotate {

7 regex_t call_insn,

8 jump_insn;

static struct ins_ops *arm64__associate_instruction_ops(struct arch *arch, const char *name)

        struct arm64_annotate *arm = arch->priv;

14 struct ins_ops *ops;

15 regmatch_t match[2];

        if (!regexec(&arm->jump_insn, name, 2, match, 0))

18 ops = &jump_ops;

        else if (!regexec(&arm->call_insn, name, 2, match, 0))

20 ops = &call_ops;

        else if (!strcmp(name, "ret"))

22 ops = &ret_ops;

23 else

24 return NULL;

        arch__associate_ins_ops(arch, name, ops);

27 return ops;

static int arm64__annotate_init(struct arch *arch, char *cpuid __maybe_unused)

32 struct arm64_annotate *arm;

33 int err;

35 if (arch->initialized)

36 return 0;

        arm = zalloc(sizeof(*arm));

39 if (!arm)

40 return -1;

42 /* bl, blr */

        err = regcomp(&arm->call_insn, "^blr?$", REG_EXTENDED);

44 if (err)

45 goto out_free_arm;

46 /* b, b.cond, br, cbz/cbnz, tbz/tbnz */

        err = regcomp(&arm->jump_insn, "^[ct]?br?\\.?(cc|cs|eq|ge|gt|hi|le|ls|lt|mi|ne|pl)?n?z?$",

48 REG_EXTENDED);

49 if (err)

50 goto out_free_call;

52 arch->initialized = true;

53 arch->priv = arm;

54 arch->associate_instruction_ops = arm64__associate_instruction_ops;

        arch->objdump.comment_char        = '/';

        arch->objdump.skip_functions_char = '+';

57 return 0;

59 out_free_call:

60 regfree(&arm->call_insn);

61 out_free_arm:

62 free(arm);

63 return -1;