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Fix emummc nintendo dir redirection

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This commit is contained in:
Michael Scire 2019-06-14 21:20:53 -07:00
parent c8f2d17d02
commit 0dcb496522
8 changed files with 66 additions and 26 deletions
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41
exosphere/src/smc_ams.c
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@ -228,46 +228,63 @@ uint32_t ams_write_address(smc_args_t *args) {
uint32_t ams_get_emummc_config(smc_args_t *args) {
/* This retrieves configuration for the current emummc context. */
/* args->X[1] = MMC id, must be size-bytes aligned and readable by EL0. */
/* args->X[2] = Pointer to output (for path for filebased), must be at least 0x80 bytes. */
upage_ref_t page_ref;
/* args->X[2] = Pointer to output (for paths for filebased + nintendo dir), must be at least 0x100 bytes. */
const uint32_t mmc_id = (uint32_t)args->X[1];
void *user_address = (void *)args->X[2];
const uintptr_t dram_address = args->X[2];
const uintptr_t dram_page_offset = (dram_address & 0xFFFULL);
const exo_emummc_config_t *emummc_cfg = exosphere_get_emummc_config();
if (mmc_id != EMUMMC_MMC_NAND) {
/* Emummc config for non-NAND storage is not yet implemented. */
return 1;
}
/* Require page alignment for input address. */
if (!ams_is_user_addr_valid(dram_address) || dram_page_offset > 0x1000 - 0x100) {
return 2;
}
/* Map pages. */
ams_map_userpage(dram_address);
void *user_address = (void *)(AMS_USER_PAGE_SECURE_MONITOR_ADDR + dram_page_offset);
/* Copy redirection dir out to user. */
memcpy((void *)((uintptr_t)user_address + sizeof(emummc_cfg->file_cfg)), emummc_cfg->emu_dir_path, sizeof(emummc_cfg->emu_dir_path));
if (emummc_cfg->base_cfg.type == EMUMMC_TYPE_NONE) {
/* Just copy base config. */
memset(args, 0, sizeof(*args));
memcpy(&args->X[1], emummc_cfg, sizeof(emummc_cfg->base_cfg));
_Static_assert(sizeof(emummc_cfg->base_cfg) <= sizeof(*args) - sizeof(args->X[0]), "Emunand base config too big!");
/* Unmap pages. */
ams_unmap_userpage();
return 0;
} else if (emummc_cfg->base_cfg.type == EMUMMC_TYPE_PARTITION) {
/* Copy base config and partition config. */
memset(args, 0, sizeof(*args));
memcpy(&args->X[1], emummc_cfg, sizeof(emummc_cfg->base_cfg) + sizeof(emummc_cfg->partition_cfg));
_Static_assert(sizeof(emummc_cfg->base_cfg) + sizeof(emummc_cfg->partition_cfg) <= sizeof(*args) - sizeof(args->X[0]), "Emunand partition config too big!");
/* Unmap pages. */
ams_unmap_userpage();
return 0;
} else if (emummc_cfg->base_cfg.type == EMUMMC_TYPE_FILES) {
/* Copy path to userpage. */
/* Initialize page reference. */
if (upage_init(&page_ref, user_address) == 0) {
return 2;
}
/* Copy result output back to user. */
if (secure_copy_to_user(&page_ref, user_address, &emummc_cfg->file_cfg, sizeof(emummc_cfg->file_cfg)) == 0) {
return 2;
}
/* Copy file dir path output to user. */
memcpy(user_address, &emummc_cfg->file_cfg, sizeof(emummc_cfg->file_cfg));
/* Copy base config afterwards, since this can't fail. */
memset(args, 0, sizeof(*args));
memcpy(&args->X[1], emummc_cfg, sizeof(emummc_cfg->base_cfg));
_Static_assert(sizeof(emummc_cfg->base_cfg) <= sizeof(*args) - sizeof(args->X[0]), "Emunand base config too big!");
/* Unmap pages. */
ams_unmap_userpage();
return 0;
} else {
/* Unmap pages. */
ams_unmap_userpage();
return 2;
}
}