我有以下ELF符号(在组装文件中定义):
Disassembly of section .memory_info:
10000bb8 <__memory_info>:
10000bb8: 10000bd4 ldrdne r0, [r0], -r4
10000bbc: 20000000 andcs r0, r0, r0
10000bc0: 00000000 andeq r0, r0, r0
10000bc4: 20000000 andcs r0, r0, r0
10000bc8: 00000000 andeq r0, r0, r0
10000bcc: 20000000 andcs r0, r0, r0
10000bd0: 000000a8 andeq r0, r0, r8, lsr #1
我想将C中的这个值作为 struct 读取.
我试着用以下方式来做:
typedef struct {
void *flash_end;
void *ram_text_begin;
void *ram_text_size;
void *ram_data_begin;
void *ram_data_size;
void *ram_bss_begin;
void *ram_bss_size;
} memory_info_t;
int main() {
extern memory_info_t __memory_info;
uint32_t *a = __memory_info.flash_end;
asm("bkpt #0");
}
但根据GDB的说法，On断点的实际值不是我预期的:
(gdb) print a
$1 = (uint32_t *) 0xffffffff