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Stage2: fix various bugs in package2.c

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This commit is contained in:
TuxSH 2018-05-21 18:18:12 +02:00
parent ffd0b5df6a
commit 5920f5a4b0
1 changed files with 38 additions and 21 deletions
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59
fusee/fusee-secondary/src/package2.c
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@ -14,12 +14,17 @@
#undef u32
static void package2_decrypt(package2_header_t *package2);
static size_t package2_get_src_section(void **section, package2_header_t *package2, unsigned int id);
static size_t package2_get_thermosphere(void **thermosphere);
static void package2_patch_kernel(void *kernel, size_t kernel_size);
static ini1_header_t *package2_rebuild_ini1(ini1_header_t *ini1, uint32_t target_firmware);
static void package2_append_section(size_t id, package2_header_t *package2, void *data, size_t size);
static void package2_append_section(unsigned int id, package2_header_t *package2, void *data, size_t size);
static void package2_fixup_header_and_section_hashes(package2_header_t *package2, size_t size);
static inline size_t align_to_4(size_t s) {
return ((s + 3) << 2) >> 2;
}
void package2_rebuild_and_copy(package2_header_t *package2, uint32_t target_firmware) {
package2_header_t *rebuilt_package2;
size_t rebuilt_package2_size;
@ -27,13 +32,13 @@ void package2_rebuild_and_copy(package2_header_t *package2, uint32_t target_firm
size_t kernel_size;
void *thermosphere;
size_t thermosphere_size;
ini1_header_t *rebuilt_ini1;
ini1_header_t *orig_ini1, *rebuilt_ini1;
/* First things first: Decrypt Package2 in place. */
package2_decrypt(package2);
printf("Decrypted package2!\n");
kernel = package2->data + package2->metadata.section_offsets[PACKAGE2_SECTION_KERNEL];
kernel_size = package2->metadata.section_sizes[PACKAGE2_SECTION_KERNEL];
kernel_size = package2_get_src_section(&kernel, package2, PACKAGE2_SECTION_KERNEL);
/* Modify Package2 to add an additional thermosphere section. */
thermosphere_size = package2_get_thermosphere(&thermosphere);
@ -46,13 +51,13 @@ void package2_rebuild_and_copy(package2_header_t *package2, uint32_t target_firm
package2_patch_kernel(kernel, kernel_size);
printf("Rebuilding the INI1 section...\n");
package2_get_src_section((void *)&orig_ini1, package2, PACKAGE2_SECTION_INI1);
/* Perform any patches to the INI1, rebuilding it (This is where our built-in sysmodules will be added.) */
rebuilt_ini1 = package2_rebuild_ini1((ini1_header_t *)(package2->data + package2->metadata.section_offsets[PACKAGE2_SECTION_INI1]), target_firmware);
rebuilt_ini1 = package2_rebuild_ini1(orig_ini1, target_firmware);
printf("Rebuilt INI1...\n");
/* Allocate the rebuilt package2. */
rebuilt_package2_size = sizeof(package2_header_t);
rebuilt_package2_size += package2->metadata.section_sizes[PACKAGE2_SECTION_KERNEL] + thermosphere_size + rebuilt_ini1->size;
rebuilt_package2_size = sizeof(package2_header_t) + kernel_size + align_to_4(thermosphere_size) + align_to_4(rebuilt_ini1->size);
if (rebuilt_package2_size > PACKAGE2_SIZE_MAX) {
fatal_error("rebuilt package2 is too big!\n");
@ -73,7 +78,7 @@ void package2_rebuild_and_copy(package2_header_t *package2, uint32_t target_firm
package2_fixup_header_and_section_hashes(rebuilt_package2, rebuilt_package2_size);
/* Relocate Package2. */
memcpy(NX_BOOTLOADER_PACKAGE2_LOAD_ADDRESS, rebuilt_package2, PACKAGE2_SIZE_MAX);
memcpy(NX_BOOTLOADER_PACKAGE2_LOAD_ADDRESS, rebuilt_package2, rebuilt_package2_size);
/* We're done. */
free(rebuilt_ini1);
@ -240,6 +245,16 @@ static void package2_decrypt(package2_header_t *package2) {
memset(package2->signature, 0, sizeof(package2->signature));
}
static size_t package2_get_src_section(void **section, package2_header_t *package2, unsigned int id) {
uint8_t *data = package2->data;
for (unsigned int i = 0; i < id; i++) {
data += package2->metadata.section_sizes[i];
}
(*section) = data;
return package2->metadata.section_sizes[id];
}
static size_t package2_get_thermosphere(void **thermosphere) {
/*extern const uint8_t thermosphere_bin[];
extern const uint32_t thermosphere_bin_size;*/
@ -272,28 +287,30 @@ static ini1_header_t *package2_rebuild_ini1(ini1_header_t *ini1, uint32_t target
return merged;
}
static void package2_append_section(size_t id, package2_header_t *package2, void *data, size_t size) {
/* This function must be called in ascending order of id */
uint32_t offset = id == 0 ? 0 : package2->metadata.section_offsets[id - 1] + package2->metadata.section_sizes[id - 1];
void *dst = package2->data + offset;
memcpy(dst, data, size);
static void package2_append_section(unsigned int id, package2_header_t *package2, void *data, size_t size) {
/* This function must be called in ascending order of id. */
/* We assume that the loading address doesn't need to be changed. */
uint8_t *dst = package2->data;
for (unsigned int i = 0; i < id; i++) {
dst += package2->metadata.section_sizes[i];
}
package2->metadata.section_offsets[id] = offset;
package2->metadata.section_sizes[id] = ((size + 3) << 2) >> 2;
memcpy(dst, data, size);
package2->metadata.section_sizes[id] = align_to_4(size);
}
static void package2_fixup_header_and_section_hashes(package2_header_t *package2, size_t size) {
/* Copy each section to its appropriate location. */
uint8_t *data = package2->data;
for (unsigned int section = 0; section < PACKAGE2_SECTION_MAX; section++) {
if (package2->metadata.section_sizes[section] == 0) {
size_t sz = (size_t)package2->metadata.section_sizes[section];
if (sz == 0) {
continue;
}
size_t sz = (size_t)package2->metadata.section_sizes[section];
size_t off = package2->metadata.section_offsets[section];
/* Fix up the hash. */
se_calculate_sha256(package2->metadata.section_hashes[section], package2->data + off, sz);
se_calculate_sha256(package2->metadata.section_hashes[section], data, sz);
data += sz;
}
/* Fix up the size in XOR'd CTR. */