PSPEmu Mount Point Method By TheFloW

#define MAX_LOADED_MODS 256

static int (* _sceAppMgrPspSaveDataRootMount)(char *mount_point);

/*
    Find the address of the module by name
*/
uint32_t findModuleAddressByName(char *name) {
    SceUID mod_list[MAX_LOADED_MODS];
    unsigned int num_loaded = MAX_LOADED_MODS;

    if (sceKernelGetModuleList(0xFF, mod_list, &num_loaded) >= 0) {
        int i;
        for (i = 0; i < num_loaded; i++) {
            Psp2LoadedModuleInfo info;
            info.size = sizeof(info);
            if (sceKernelGetModuleInfo(mod_list[i], &info) >= 0) {
                if (strcmp(info.module_name, name) == 0) {
                    return (uint32_t)info.segments[0].vaddr;
                }
            }
        }
    }

    return 0;
}

/*
    Simple method to find our desired syscall. Should support 3.18-3.51 (firmwares below aren't tested yet)
*/
void findSceAppUtilFunctions() {
    uint32_t text_addr = findModuleAddressByName("SceAppUtil");

    uint32_t SceAppMgr_text_addr = 0;
    uint32_t SceAppMgr_imports_addr = 0;

    uint32_t i;
    for (i = 0; i < 0x10000; i += 4) {
        if (SceAppMgr_text_addr) {
            if (*(uint32_t *)(text_addr + i) == SceAppMgr_text_addr) {
                SceAppMgr_imports_addr = *(uint32_t *)(text_addr + i + 0xC);
                break;
            }
        } else {
            if (strcmp((char *)(text_addr + i), "SceAppMgr") == 0) {
                SceAppMgr_text_addr = text_addr + i;
                i = 0;
                continue;
            }
        }
    }

    if (SceAppMgr_imports_addr) {
        _sceAppMgrPspSaveDataRootMount = (void *)(*(uint32_t *)(SceAppMgr_imports_addr - 0x14));
    }
}

/*
    Get pspemu mount point
*/
char mount_point[16];
memset(mount_point, 0, sizeof(mount_point));
_sceAppMgrPspSaveDataRootMount(mount_point);

/*
    Demonstration of the mount point :)
    'path' is now equivalent to ms0:/hello_world.bin
*/

char path[128];
sprintf(path, "%s/hello_world.bin", mount_point);