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Replace constants in imgdrv by searching instead of hardcoded offsets #443

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merged 2 commits into from Jun 22, 2021
Merged

Replace constants in imgdrv by searching instead of hardcoded offsets #443

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6f673c2
Replace constants in imgdrv by searching instead of hardcoded offsets
uyjulian Jun 20, 2021
d537457
Only search on first invocation of ResetIopSpecial
uyjulian Jun 21, 2021
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18 changes: 16 additions & 2 deletions ee_core/src/iopmgr.c
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Expand Up @@ -17,9 +17,12 @@
#include "syshook.h"

extern int _iop_reboot_count;
static int imgdrv_offset_ioprpimg = 0;
static int imgdrv_offset_ioprpsiz = 0;

static void ResetIopSpecial(const char *args, unsigned int arglen)
{
int i;
void *pIOP_buffer, *IOPRP_img, *imgdrv_irx;
unsigned int length_rounded, CommandLen, size_IOPRP_img, size_imgdrv_irx;
char command[RESET_ARG_MAX + 1];
Expand All @@ -44,8 +47,19 @@ static void ResetIopSpecial(const char *args, unsigned int arglen)

CopyToIop(IOPRP_img, length_rounded, pIOP_buffer);

*(void **)(UNCACHED_SEG(&((unsigned char *)imgdrv_irx)[0x180])) = pIOP_buffer;
*(u32 *)(UNCACHED_SEG(&((unsigned char *)imgdrv_irx)[0x184])) = size_IOPRP_img;
if (imgdrv_offset_ioprpimg == 0 || imgdrv_offset_ioprpsiz == 0) {
for (i = 0; i < size_imgdrv_irx; i += 4) {
if (*(u32 *)((&((unsigned char *)imgdrv_irx)[i])) == 0xDEC1DEC1) {
imgdrv_offset_ioprpimg = i;
}
if (*(u32 *)((&((unsigned char *)imgdrv_irx)[i])) == 0xDEC2DEC2) {
imgdrv_offset_ioprpsiz = i;
}
}
}

*(void **)(UNCACHED_SEG(&((unsigned char *)imgdrv_irx)[imgdrv_offset_ioprpimg])) = pIOP_buffer;
*(u32 *)(UNCACHED_SEG(&((unsigned char *)imgdrv_irx)[imgdrv_offset_ioprpsiz])) = size_IOPRP_img;

LoadMemModule(0, imgdrv_irx, size_imgdrv_irx, 0, NULL);

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