c代码获取某地址在elf文件的名称

最新推荐文章于 2025-07-12 23:05:38 发布

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最新推荐文章于 2025-07-12 23:05:38 发布

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CC 4.0 BY-SA版权

文章标签：算法

本文链接：https://blog.youkuaiyun.com/dp__mcu/article/details/149276415

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define MAX_LINE 256

unsigned long parse_elf_function(const char* elf_path, const char* func_name) {
char cmd[512];
FILE *fp;
char line[MAX_LINE];

// 构建readelf命令
snprintf(cmd, sizeof(cmd), "readelf -sW %s | grep %s", elf_path, func_name);

// 执行命令并获取输出
if ((fp = popen(cmd, "r")) == NULL) {
perror("popen failed");
exit(EXIT_FAILURE);
}

// 解析输出行
while (fgets(line, sizeof(line), fp)) {
unsigned long addr;
char name[128];

// 匹配格式: " Num: Value Size Type Bind Vis Ndx Name"
if (sscanf(line, "%*d: %lx %*d %*s %*s %*s %*d %127s", &addr, name) == 2) {
if (strcmp(name, func_name) == 0) {
pclose(fp);
return addr;
}
}
}

pclose(fp);
fprintf(stderr, "Function '%s' not found\n", func_name);
exit(EXIT_FAILURE);
}

void qemu_set_irq(qemu_irq irq, int level)
{
unsigned long run_addr, addr_offset;
if( !irq ){
return;
}
   irq->handler(irq->opaque, irq->n, level);

   //printf("\nlevel = %d\n", level);
   //printf("irq->n = %d\n", irq->n);
   //printf("irq->handler = %p\n", irq->handler);
//printf("qemu_set_irq = %p\n", qemu_set_irq);
   //set_irq_level
   //arm_cpu_set_irq
   //abort();
   //printf("Caller: %p\n", __builtin_return_address(0));
   //printf("irq->handler xxx= %p\n", irq->handler);

//system( "readelf -sW ../qemu5p1/qemu-5.1.0/arm-softmmu/qemu-system-arm | grep qemu_set_irq" );

unsigned long addr = parse_elf_function("../qemu5p1/qemu-5.1.0/arm-softmmu/qemu-system-arm", "qemu_set_irq" );
run_addr = qemu_set_irq;

   //printf("elf_addr = %p\n", addr );
   //printf("run_addr = %p\n", run_addr );
   //printf("sizeof(run_addr) = %d\n", sizeof(run_addr) );
   addr_offset = run_addr-addr;
   //printf("addr_offset = 0x%lx\n", addr_offset );
   //printf("irq->handler xxx= %p\n", irq->handler);

printf("irq->handler in elf = %lx\n", irq->handler - addr_offset );

}

readelf -sW arm-softmmu/qemu-system-arm | grep 466ae0
2517: 0000000000466ae0 242 FUNC LOCAL DEFAULT 14 arm_cpu_set_irq