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nyx: emummc: guard for pointer arithmetics

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And also explain what type of backup fails on errors.
This commit is contained in:
CTCaer
2025-04-30 08:33:08 +03:00
parent 0c8cd08b55
commit 9f29f93078
1 changed files with 20 additions and 10 deletions
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30
nyx/nyx_gui/frontend/fe_emmc_tools.c
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@@ -53,19 +53,19 @@ static void _get_valid_partition(u32 *sector_start, u32 *sector_size, u32 *part_
*sector_start = mbr->partitions[i].start_sct;
u8 type = mbr->partitions[i].type;
u32 sector_size_safe = backup ? 0x400000 : (*sector_size) + 0x8000; // 2GB min safe size for backup.
if ((curr_part_size >= sector_size_safe) && *sector_start && type != 0x83 && (!backup || type == 0xE0))
if ((curr_part_size >= sector_size_safe) && (*sector_start) && type != 0x83 && (!backup || type == 0xE0))
{
if (backup)
{
u8 gpt_check[SD_BLOCKSIZE] = { 0 };
sdmmc_storage_read(&sd_storage, *sector_start + 0xC001, 1, gpt_check);
sdmmc_storage_read(&sd_storage, (*sector_start) + 0xC001, 1, gpt_check);
if (!memcmp(gpt_check, "EFI PART", 8))
{
*sector_size = curr_part_size;
*sector_start = *sector_start + 0x8000;
*sector_start = (*sector_start) + 0x8000;
break;
}
sdmmc_storage_read(&sd_storage, *sector_start + 0x4001, 1, gpt_check);
sdmmc_storage_read(&sd_storage, (*sector_start) + 0x4001, 1, gpt_check);
if (!memcmp(gpt_check, "EFI PART", 8))
{
*sector_size = curr_part_size;
@@ -91,7 +91,7 @@ static void _get_valid_partition(u32 *sector_start, u32 *sector_size, u32 *part_
if (backup && *part_idx && *sector_size)
{
gpt_t *gpt = (gpt_t *)zalloc(sizeof(gpt_t));
sdmmc_storage_read(&sd_storage, *sector_start + 0x4001, 1, gpt);
sdmmc_storage_read(&sd_storage, (*sector_start) + 0x4001, 1, gpt);
u32 new_size = gpt->header.alt_lba + 1;
if (*sector_size > new_size)
@@ -102,7 +102,7 @@ static void _get_valid_partition(u32 *sector_start, u32 *sector_size, u32 *part_
free(gpt);
}
else if (!backup && *part_idx)
*sector_start = *sector_start + 0x8000;
*sector_start = (*sector_start) + 0x8000;
}
static lv_obj_t *create_mbox_text(const char *text, bool button_ok)
@@ -622,10 +622,20 @@ static int _dump_emmc_part(emmc_tool_gui_t *gui, char *sd_path, int active_part,
while (res_read)
{
s_printf(gui->txt_buf,
"\n#FFDD00 Error reading %d blocks @ LBA %08X,#\n"
"#FFDD00 from eMMC (try %d). #",
num, lba_curr, ++retryCount);
if (!gui->raw_emummc)
{
s_printf(gui->txt_buf,
"\n#FFDD00 Error reading %d blocks @ LBA %08X,#\n"
"#FFDD00 from eMMC (try %d). #",
num, lba_curr, ++retryCount);
}
else
{
s_printf(gui->txt_buf,
"\n#FFDD00 Error reading %d blocks @ LBA %08X,#\n"
"#FFDD00 from emuMMC @ %08X (try %d). #",
num, lba_curr + sd_sector_off, lba_curr, ++retryCount);
}
lv_label_ins_text(gui->label_log, LV_LABEL_POS_LAST, gui->txt_buf);
manual_system_maintenance(true);