LowMemMode.c

#include <taihen.h>
#include <dolcesdk.h>
#include <psp2/kernel/modulemgr.h> 

static SceUID g_hooks[1];
uint32_t text_addr, text_size, data_addr, data_size;

void _start() __attribute__((weak, alias("module_start")));
static tai_hook_ref_t ref_hook0;
int budget_check_patched(void* a1, int a2, int a3)
{
	TAI_CONTINUE(int, ref_hook0, a1, a2, a3);
	return 0;
}

int module_start(SceSize argc, const void *args)
{
	tai_module_info_t info;
	info.size = sizeof(info);
	int ret = taiGetModuleInfo("SceShell", &info);
	if (ret < 0) {
		return SCE_KERNEL_START_FAILED;
	}

	// Modified from TheOfficialFloW/Adrenaline
	SceKernelModuleInfo mod_info;
	mod_info.size = sizeof(SceKernelModuleInfo);
	ret = sceKernelGetModuleInfo(info.modid, &mod_info);
	if (ret < 0) {
		return SCE_KERNEL_START_FAILED;
	}
	text_addr = (uint32_t)mod_info.segments[0].vaddr;
	text_size = (uint32_t)mod_info.segments[0].memsz;
	data_addr = (uint32_t)mod_info.segments[1].vaddr;
	data_size = (uint32_t)mod_info.segments[1].memsz;

	int offset;

	switch (info.module_nid) {

	case 0x0552F692: // retail 3.60 SceShell
		offset = 0x27246E;
		break;

	case 0x5549BF1F: // retail 3.65 SceShell
	case 0x34B4D82E: // retail 3.67 SceShell
	case 0x12DAC0F3: // retail 3.68 SceShell
		offset = 0x272526;
		break;

		//For testing
	case 0x587F9CED: // PTEL 3.65 SceShell
		offset = 0x26A8CA;
		break;

	default:
		return SCE_KERNEL_START_FAILED;
	}
	g_hooks[0] = taiHookFunctionOffset(&ref_hook0,
		info.modid,
		0,          // segidx
		offset,     // offset
		1,          // thumb
		budget_check_patched);

	return SCE_KERNEL_START_SUCCESS;
}

int module_stop(SceSize argc, const void *args)
{
	if (g_hooks[0] >= 0) taiHookRelease(g_hooks[0], ref_hook0);
	return SCE_KERNEL_STOP_SUCCESS;
}