embeded LD_PRELOAD

引用

eve@eve:~/squashfs-root$ sudo chroot . ./qemu-arm -E LD_PRELOAD="/nvram.so" usr/sbin/httpd
usr/sbin/httpd: relocation error: /nvram.so: symbol __register_frame_info, version GLIBC_2.0 not defined in file libgcc_s.so.1 with link time reference
eve@eve:~/squashfs-root$

引用

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

void __register_frame_info(void) { }
void __deregister_frame_info(void) { }
void __unregister_frame_info(void) { }

char *nvram_get(char *key)
{
        char *value = NULL;

        if(strcmp(key, "lan_ipaddr") == 0)
        {
                value = strdup("127.0.0.1");
        }

        if(strcmp(key, "lan_proto") == 0)
        {
                value = strdup("static");
        }

        printf("nvram_get(%s) == %s\n", key, value);
        return value;
}

引用

chroot . ./qemu-arm -E LD_PRELOAD="/nvram.so" usr/sbin/httpd