mirror of
https://github.com/oliverschmidt/contiki.git
synced 2024-11-05 04:05:34 +00:00
142 lines
4.1 KiB
C
142 lines
4.1 KiB
C
#include "contiki.h"
|
|
#include "elfloader-arch.h"
|
|
#include "cfs-coffee-arch.h"
|
|
|
|
#if 1
|
|
#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-arm.c */
|
|
|
|
static uint32_t datamemory_aligned[(ELFLOADER_DATAMEMORY_SIZE+3)/4]; //word aligned
|
|
static uint8_t* datamemory = (uint8_t *)datamemory_aligned;
|
|
VAR_AT_SEGMENT (static const uint16_t textmemory[ELFLOADER_TEXTMEMORY_SIZE/2],".elf_text") = {0}; //halfword aligned
|
|
/*---------------------------------------------------------------------------*/
|
|
void *
|
|
elfloader_arch_allocate_ram(int size)
|
|
{
|
|
if(size > sizeof(datamemory_aligned)){
|
|
PRINTF("RESERVED RAM TOO SMALL\n");
|
|
}
|
|
return datamemory;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
void *
|
|
elfloader_arch_allocate_rom(int size)
|
|
{
|
|
if(size > sizeof(textmemory)){
|
|
PRINTF("RESERVED FLASH TOO SMALL\n");
|
|
}
|
|
return (void *)textmemory;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
#define READSIZE sizeof(datamemory_aligned)
|
|
|
|
void elfloader_arch_write_rom(int fd, unsigned short textoff, unsigned int size, char *mem)
|
|
{
|
|
int32u ptr;
|
|
int nbytes;
|
|
|
|
cfs_seek(fd, textoff, CFS_SEEK_SET);
|
|
|
|
cfs_seek(fd, textoff, CFS_SEEK_SET);
|
|
for(ptr = 0; ptr < size; ptr += READSIZE) {
|
|
|
|
/* Read data from file into RAM. */
|
|
nbytes = cfs_read(fd, (unsigned char *)datamemory, READSIZE);
|
|
|
|
/* Write data to flash. */
|
|
stm32w_flash_write((int32u)mem, datamemory, nbytes);
|
|
}
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
|
|
|
|
void elfloader_arch_relocate(int fd,
|
|
unsigned int sectionoffset,
|
|
char *sectionaddr,
|
|
struct elf32_rela *rela, char *addr)
|
|
{
|
|
unsigned int type;
|
|
|
|
type = ELF32_R_TYPE(rela->r_info);
|
|
|
|
cfs_seek(fd, sectionoffset + rela->r_offset, CFS_SEEK_SET);
|
|
|
|
/* 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(fd, (char*)&addend, 4);
|
|
addr += addend;
|
|
cfs_seek(fd, -4, CFS_SEEK_CUR);
|
|
cfs_write(fd,&addr,4);
|
|
//elfloader_output_write_segment(output,(char*) &addr, 4);
|
|
PRINTF("%p: addr: %p\n", sectionaddr +rela->r_offset,
|
|
addr);
|
|
}
|
|
break;
|
|
case R_ARM_THM_CALL:
|
|
{
|
|
uint16_t instr[2];
|
|
int32_t offset;
|
|
char *base;
|
|
cfs_read(fd, (char*)instr, 4);
|
|
cfs_seek(fd, -4, CFS_SEEK_CUR);
|
|
/* 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 (((instr[1]) & 0xe800) == 0xe800) {
|
|
/* BL or BLX */
|
|
if (((uint32_t)addr) & 0x1) {
|
|
/* BL */
|
|
instr[1] |= 0x1800;
|
|
} else {
|
|
#if defined(__ARM_ARCH_4T__)
|
|
return ELFLOADER_UNHANDLED_RELOC;
|
|
#else
|
|
/* BLX */
|
|
instr[1] &= ~0x1800;
|
|
instr[1] |= 0x0800;
|
|
#endif
|
|
}
|
|
}
|
|
/* Adjust address for BLX */
|
|
if ((instr[1] & 0x1800) == 0x0800) {
|
|
addr = (char*)((((uint32_t)addr) & 0xfffffffd)
|
|
| (((uint32_t)base) & 0x00000002));
|
|
}
|
|
offset = addr - (sectionaddr + (rela->r_offset + 4));
|
|
PRINTF("elfloader-arm.c: offset %d\n", (int)offset);
|
|
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, instr[0], instr[1], (int)offset, addr); */
|
|
instr[0] = (instr[0] & 0xf800) | ((offset>>12)&0x07ff);
|
|
instr[1] = (instr[1] & 0xf800) | ((offset>>1)&0x07ff);
|
|
cfs_write(fd,&instr,4);
|
|
//elfloader_output_write_segment(output, (char*)instr, 4);
|
|
/* PRINTF("cfs_write: %04x %04x\n",instr[0], instr[1]); */
|
|
}
|
|
break;
|
|
|
|
default:
|
|
PRINTF("elfloader-arm.c: unsupported relocation type %d\n", type);
|
|
}
|
|
}
|