mirror of
https://github.com/oliverschmidt/contiki.git
synced 2024-07-16 21:29:32 +00:00
79 lines
2.3 KiB
C
79 lines
2.3 KiB
C
#include <malloc.h>
|
|
#include <loader/elfloader-arch-otf.h>
|
|
|
|
#if 0
|
|
#include <stdio.h>
|
|
#define PRINTF(...) printf(__VA_ARGS__)
|
|
#else
|
|
#define PRINTF(...) do {} while (0)
|
|
#endif
|
|
|
|
#define ELF32_R_TYPE(info) ((unsigned char)(info))
|
|
|
|
/* Supported relocations */
|
|
|
|
#define R_ARM_ABS32 2
|
|
#define R_ARM_THM_CALL 10
|
|
|
|
/* Adapted from elfloader-avr.c */
|
|
|
|
void
|
|
elfloader_arch_relocate(int input_fd,
|
|
struct elfloader_output *output,
|
|
unsigned int sectionoffset,
|
|
char *sectionaddr,
|
|
struct elf32_rela *rela, char *addr)
|
|
{
|
|
unsigned int type;
|
|
unsigned char instr[4];
|
|
|
|
type = ELF32_R_TYPE(rela->r_info);
|
|
|
|
cfs_seek(input_fd, sectionoffset + rela->r_offset);
|
|
|
|
/* PRINTF("elfloader_arch_relocate: type %d\n", type); */
|
|
/* PRINTF("Addr: %p, Addend: %ld\n", addr, rela->r_addend); */
|
|
switch(type) {
|
|
case R_ARM_ABS32:
|
|
{
|
|
int32_t addend;
|
|
cfs_read(input_fd, (char*)&addend, 4);
|
|
addr += addend;
|
|
elfloader_output_write_segment(output,(char*) &addr, 4);
|
|
PRINTF("%p: addr: %p\n", sectionaddr +rela->r_offset,
|
|
addr);
|
|
}
|
|
break;
|
|
case R_ARM_THM_CALL:
|
|
{
|
|
int32_t offset;
|
|
char *base;
|
|
cfs_read(input_fd, (char*)instr, 4);
|
|
/* Ignore the addend since it will be zero for calls to symbols,
|
|
and I can't think of a case when doing a relative call to
|
|
a non-symbol position */
|
|
base = sectionaddr + (rela->r_offset + 4);
|
|
if (((*(uint16_t*)(instr+2)) & 0x1800) == 0x0800) {
|
|
addr = (char*)((((uint32_t)addr) & 0xfffffffd)
|
|
| (((uint32_t)base) & 0x00000002));
|
|
}
|
|
offset = addr - (sectionaddr + (rela->r_offset + 4));
|
|
if (offset < -(1<<22) || offset >= (1<<22)) {
|
|
PRINTF("elfloader-arm.c: offset %d too large for relative call\n",
|
|
(int)offset);
|
|
}
|
|
/* PRINTF("%p: %04x %04x offset: %d addr: %p\n", sectionaddr +rela->r_offset, *(uint16_t*)instr, *(uint16_t*)(instr+2), (int)offset, addr); */
|
|
*(uint16_t*)instr = (*(uint16_t*)instr & 0xf800) | ((offset>>12)&0x07ff);
|
|
*(uint16_t*)(instr+2) = ((*(uint16_t*)(instr+2) & 0xf800)
|
|
| ((offset>>1)&0x07ff));
|
|
elfloader_output_write_segment(output, (char*)instr, 4);
|
|
/* PRINTF("cfs_write: %04x %04x\n",*(uint16_t*)instr, *(uint16_t*)(instr+2)); */
|
|
}
|
|
break;
|
|
|
|
default:
|
|
PRINTF("elfloader-arm.c: unsupported relocation type %d\n", type);
|
|
break;
|
|
}
|
|
}
|