cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

instructions.c (1441B)

      1// SPDX-License-Identifier: GPL-2.0
      2#include <linux/compiler.h>
      3#include <linux/zalloc.h>
      4#include <sys/types.h>
      5#include <regex.h>
      6#include <stdlib.h>
      7
      8struct arm_annotate {
      9	regex_t call_insn,
     10		jump_insn;
     11};
     12
     13static struct ins_ops *arm__associate_instruction_ops(struct arch *arch, const char *name)
     14{
     15	struct arm_annotate *arm = arch->priv;
     16	struct ins_ops *ops;
     17	regmatch_t match[2];
     18
     19	if (!regexec(&arm->call_insn, name, 2, match, 0))
     20		ops = &call_ops;
     21	else if (!regexec(&arm->jump_insn, name, 2, match, 0))
     22		ops = &jump_ops;
     23	else
     24		return NULL;
     25
     26	arch__associate_ins_ops(arch, name, ops);
     27	return ops;
     28}
     29
     30static int arm__annotate_init(struct arch *arch, char *cpuid __maybe_unused)
     31{
     32	struct arm_annotate *arm;
     33	int err;
     34
     35	if (arch->initialized)
     36		return 0;
     37
     38	arm = zalloc(sizeof(*arm));
     39	if (!arm)
     40		return ENOMEM;
     41
     42#define ARM_CONDS "(cc|cs|eq|ge|gt|hi|le|ls|lt|mi|ne|pl|vc|vs)"
     43	err = regcomp(&arm->call_insn, "^blx?" ARM_CONDS "?$", REG_EXTENDED);
     44	if (err)
     45		goto out_free_arm;
     46	err = regcomp(&arm->jump_insn, "^bx?" ARM_CONDS "?$", REG_EXTENDED);
     47	if (err)
     48		goto out_free_call;
     49#undef ARM_CONDS
     50
     51	arch->initialized = true;
     52	arch->priv	  = arm;
     53	arch->associate_instruction_ops   = arm__associate_instruction_ops;
     54	arch->objdump.comment_char	  = ';';
     55	arch->objdump.skip_functions_char = '+';
     56	return 0;
     57
     58out_free_call:
     59	regfree(&arm->call_insn);
     60out_free_arm:
     61	free(arm);
     62	return SYMBOL_ANNOTATE_ERRNO__ARCH_INIT_REGEXP;
     63}