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Soft-Patch any IPS size

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This commit is contained in:
brenodantas10 2019-09-01 16:01:48 -03:00
parent 33c681c0c7
commit 49032ae2f2
1 changed files with 103 additions and 27 deletions
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130
tasks/task_patch.c
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@ -50,7 +50,7 @@ enum patch_error
PATCH_PATCH_INVALID_HEADER,
PATCH_PATCH_INVALID,
PATCH_SOURCE_TOO_SMALL,
PATCH_TARGET_TOO_SMALL,
PATCH_TARGET_ALLOC_FAILED,
PATCH_SOURCE_INVALID,
PATCH_TARGET_INVALID,
PATCH_SOURCE_CHECKSUM_INVALID,
@ -184,7 +184,7 @@ static enum patch_error bps_apply_patch(
*target_data=prov;
bps.target_length=modify_target_size;
}else
return PATCH_TARGET_TOO_SMALL;
return PATCH_TARGET_ALLOC_FAILED;
}
while (bps.modify_offset < bps.modify_length - 12)
@ -371,7 +371,7 @@ static enum patch_error ups_apply_patch(
*targetdata=prov;
data.target_data=prov;
}else
return PATCH_TARGET_TOO_SMALL;
return PATCH_TARGET_ALLOC_FAILED;
}
data.target_length = (unsigned)*targetlength;
@ -430,13 +430,100 @@ static enum patch_error ups_apply_patch(
return PATCH_SOURCE_INVALID;
}
static enum patch_error ips_alloc_targetdata(
const uint8_t *patchdata, uint64_t patchlen,
uint64_t sourcelength,
uint8_t **targetdata, uint64_t *targetlength)
{
*targetlength = sourcelength;
uint8_t *prov_alloc;
uint32_t offset = 5;
for (;;)
{
uint32_t address;
unsigned length;
if (offset > patchlen - 3)
break;
address = patchdata[offset++] << 16;
address |= patchdata[offset++] << 8;
address |= patchdata[offset++] << 0;
if (address == 0x454f46) /* EOF */
{
if (offset == patchlen)
{
prov_alloc=(uint8_t*)malloc((size_t)*targetlength);
if (!prov_alloc)
return PATCH_TARGET_ALLOC_FAILED;
free(*targetdata);
*targetdata=prov_alloc;
return PATCH_SUCCESS;
}
else if (offset == patchlen - 3)
{
uint32_t size = patchdata[offset++] << 16;
size |= patchdata[offset++] << 8;
size |= patchdata[offset++] << 0;
*targetlength = size;
prov_alloc=(uint8_t*)malloc((size_t)*targetlength);
if (!prov_alloc)
return PATCH_TARGET_ALLOC_FAILED;
free(*targetdata);
*targetdata=prov_alloc;
return PATCH_SUCCESS;
}
}
if (offset > patchlen - 2)
break;
length = patchdata[offset++] << 8;
length |= patchdata[offset++] << 0;
if (length) /* Copy */
{
if (offset > patchlen - length)
break;
while (length--)
{
address++;
offset++;
}
}
else /* RLE */
{
if (offset > patchlen - 3)
break;
length = patchdata[offset++] << 8;
length |= patchdata[offset++] << 0;
if (length == 0) /* Illegal */
break;
while (length--)
address++;
offset++;
}
if (address > *targetlength)
*targetlength = address;
}
return PATCH_PATCH_INVALID;
}
static enum patch_error ips_apply_patch(
const uint8_t *patchdata, uint64_t patchlen,
const uint8_t *sourcedata, uint64_t sourcelength,
uint8_t **targetdata_fix, uint64_t *targetlength)
uint8_t **targetdata, uint64_t *targetlength)
{
uint32_t offset = 5;
uint8_t* targetdata=*targetdata_fix;
if (patchlen < 8 ||
patchdata[0] != 'P' ||
patchdata[1] != 'A' ||
@ -444,10 +531,14 @@ static enum patch_error ips_apply_patch(
patchdata[3] != 'C' ||
patchdata[4] != 'H')
return PATCH_PATCH_INVALID;
enum patch_error error_patch = ips_alloc_targetdata( patchdata, patchlen,
sourcelength, targetdata,
targetlength);
if ( error_patch != PATCH_SUCCESS)
return error_patch;
memcpy(targetdata, sourcedata, (size_t)sourcelength);
*targetlength = sourcelength;
memcpy(*targetdata, sourcedata, (size_t)sourcelength);
for (;;)
{
@ -470,7 +561,6 @@ static enum patch_error ips_apply_patch(
uint32_t size = patchdata[offset++] << 16;
size |= patchdata[offset++] << 8;
size |= patchdata[offset++] << 0;
*targetlength = size;
return PATCH_SUCCESS;
}
}
@ -487,7 +577,7 @@ static enum patch_error ips_apply_patch(
break;
while (length--)
targetdata[address++] = patchdata[offset++];
(*targetdata)[address++] = patchdata[offset++];
}
else /* RLE */
{
@ -501,13 +591,10 @@ static enum patch_error ips_apply_patch(
break;
while (length--)
targetdata[address++] = patchdata[offset];
(*targetdata)[address++] = patchdata[offset];
offset++;
}
if (address > *targetlength)
*targetlength = address;
}
return PATCH_PATCH_INVALID;
@ -520,23 +607,12 @@ static bool apply_patch_content(uint8_t **buf,
enum patch_error err = PATCH_UNKNOWN;
ssize_t ret_size = *size;
uint8_t *ret_buf = *buf;
uint64_t target_size = ret_size * 4; /* Just to be sure. */
uint8_t *patched_content = (uint8_t*)malloc((size_t)target_size);
uint64_t target_size = 0;
uint8_t *patched_content = NULL;
RARCH_LOG("Found %s file in \"%s\", attempting to patch ...\n",
patch_desc, patch_path);
if (!patched_content)
{
RARCH_ERR("%s\n",
msg_hash_to_str(MSG_FAILED_TO_ALLOCATE_MEMORY_FOR_PATCHED_CONTENT));
*buf = ret_buf;
*size = ret_size;
return false;
}
err = func((const uint8_t*)patch_data, patch_size, ret_buf,
ret_size, &patched_content, &target_size);