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/*
* Firmware Analyzer - Runtime GSP firmware analysis
* Auto-discovers RPC handler addresses, struct layouts, and firmware signatures
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/firmware.h>
#include <linux/crc32.h>
#include <crypto/hash.h>
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/vmalloc.h>
#include "firmware_analyzer.h"
#include "gsp_rpc_client.h"
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Open-IOV");
MODULE_DESCRIPTION("GSP Firmware Analyzer");
/* Firmware signature database */
struct fw_signature {
char version[32];
u32 crc32;
u8 sha256[32];
struct fw_addresses addrs;
};
static struct fw_signature known_signatures[] = {
{
.version = "570.144W",
.crc32 = 0x0, /* Will be computed */
.sha256 = {0}, /* Will be computed */
.addrs = {
.rpc_dispatch_primary = 0x057A1AC0,
.rpc_jump_table = 0x059BFEB0,
.alloc_main = 0x057E94EC,
.schedule_main = 0x051EFBF4,
.bar_trap_handler = 0x04CB8188,
.wpr_handler1 = 0x04F00B0C,
.wpr_handler2 = 0x04F00C78,
.migration_table1 = 0x04179ED8,
.migration_table2 = 0x04179FBC,
.entry_point = 0x04009000,
}
},
};
/* Pattern signatures for auto-discovery */
static const u8 pattern_rpc_dispatch[] = {
0x67, 0x05, 0x00, 0x00, /* auipc a0, 0x5 */
0x03, 0x85, 0x05, 0x00, /* ld a1, 0x500(a0) */
};
static const u8 pattern_jump_table[] = {
0x00, 0x00, 0x00, 0x00, /* .dword entries */
};
static const u8 pattern_alloc[] = {
0x73, 0x22, 0x00, 0x00, /* sd s0, 0(sp) */
0x73, 0x62, 0x08, 0x00, /* sd s1, 8(sp) */
};
static int compute_firmware_crc32(const u8 *data, size_t len, u32 *crc_out)
{
*crc_out = crc32_le(0, data, len);
return 0;
}
static int compute_firmware_sha256(const u8 *data, size_t len, u8 *sha_out)
{
struct crypto_shash *tfm;
struct shash_desc *desc;
int ret;
tfm = crypto_alloc_shash("sha256", 0, 0);
if (IS_ERR(tfm))
return PTR_ERR(tfm);
desc = kmalloc(sizeof(*desc) + crypto_shash_descsize(tfm), GFP_KERNEL);
if (!desc) {
crypto_free_shash(tfm);
return -ENOMEM;
}
desc->tfm = tfm;
ret = crypto_shash_init(desc);
if (!ret)
ret = crypto_shash_update(desc, data, len);
if (!ret)
ret = crypto_shash_final(desc, sha_out);
kfree(desc);
crypto_free_shash(tfm);
return ret;
}
static int find_pattern(const u8 *data, size_t data_len, const u8 *pattern, size_t pattern_len, u64 *offset)
{
for (size_t i = 0; i + pattern_len <= data_len; i++) {
if (memcmp(data + i, pattern, pattern_len) == 0) {
*offset = i;
return 0;
}
}
return -ENOENT;
}
static int analyze_rpc_dispatcher(const u8 *fw, size_t fw_len, struct fw_addresses *addrs)
{
u64 offset;
int ret;
ret = find_pattern(fw, fw_len, pattern_rpc_dispatch, sizeof(pattern_rpc_dispatch), &offset);
if (ret == 0) {
addrs->rpc_dispatch_primary = GSP_FW_BASE + offset;
pr_info("FW_ANALYZER: Found RPC dispatcher at 0x%llx\n", addrs->rpc_dispatch_primary);
}
ret = find_pattern(fw, fw_len, pattern_jump_table, sizeof(pattern_jump_table), &offset);
if (ret == 0) {
addrs->rpc_jump_table = GSP_FW_BASE + offset;
pr_info("FW_ANALYZER: Found RPC jump table at 0x%llx\n", addrs->rpc_jump_table);
}
ret = find_pattern(fw, fw_len, pattern_alloc, sizeof(pattern_alloc), &offset);
if (ret == 0) {
addrs->alloc_main = GSP_FW_BASE + offset;
pr_info("FW_ANALYZER: Found ALLOC handler at 0x%llx\n", addrs->alloc_main);
}
return 0;
}
int fw_analyzer_analyze(const u8 *fw_data, size_t fw_len, struct fw_analysis_result *result)
{
int ret;
if (!fw_data || !result || fw_len == 0)
return -EINVAL;
memset(result, 0, sizeof(*result));
result->fw_size = fw_len;
/* Compute signatures */
ret = compute_firmware_crc32(fw_data, fw_len, &result->crc32);
if (ret)
return ret;
ret = compute_firmware_sha256(fw_data, fw_len, result->sha256);
if (ret)
return ret;
pr_info("FW_ANALYZER: Firmware size=%zu, CRC32=0x%08x\n", fw_len, result->crc32);
pr_info("FW_ANALYZER: SHA256: %*phN\n", 32, result->sha256);
/* Match against known signatures */
for (size_t i = 0; i < ARRAY_SIZE(known_signatures); i++) {
if (known_signatures[i].crc32 == result->crc32 &&
memcmp(known_signatures[i].sha256, result->sha256, 32) == 0) {
strncpy(result->version, known_signatures[i].version, sizeof(result->version) - 1);
result->addresses = known_signatures[i].addrs;
result->matched = true;
pr_info("FW_ANALYZER: Matched known firmware version: %s\n", result->version);
return 0;
}
}
/* Auto-discover addresses if no match */
pr_info("FW_ANALYZER: No known signature match, attempting auto-discovery\n");
ret = analyze_rpc_dispatcher(fw_data, fw_len, &result->addresses);
if (ret == 0) {
result->matched = false;
snprintf(result->version, sizeof(result->version), "unknown-%08x", result->crc32);
}
return ret;
}
int fw_analyzer_load_and_analyze(const char *fw_path, struct fw_analysis_result *result)
{
const struct firmware *fw;
int ret;
ret = request_firmware(&fw, fw_path, NULL);
if (ret) {
pr_err("FW_ANALYZER: Failed to load firmware %s: %d\n", fw_path, ret);
return ret;
}
ret = fw_analyzer_analyze(fw->data, fw->size, result);
release_firmware(fw);
return ret;
}
void fw_analyzer_print_result(const struct fw_analysis_result *result)
{
pr_info("=== Firmware Analysis Result ===\n");
pr_info("Version: %s\n", result->version);
pr_info("Size: %zu bytes\n", result->fw_size);
pr_info("CRC32: 0x%08x\n", result->crc32);
pr_info("SHA256: %*phN\n", 32, result->sha256);
pr_info("Matched: %s\n", result->matched ? "yes" : "no");
pr_info("Addresses:\n");
pr_info(" RPC Dispatch Primary: 0x%llx\n", result->addresses.rpc_dispatch_primary);
pr_info(" RPC Jump Table: 0x%llx\n", result->addresses.rpc_jump_table);
pr_info(" ALLOC Main: 0x%llx\n", result->addresses.alloc_main);
pr_info(" SCHEDULE Main: 0x%llx\n", result->addresses.schedule_main);
pr_info(" BAR Trap Handler: 0x%llx\n", result->addresses.bar_trap_handler);
pr_info(" WPR Handler 1: 0x%llx\n", result->addresses.wpr_handler1);
pr_info(" WPR Handler 2: 0x%llx\n", result->addresses.wpr_handler2);
pr_info(" Migration Table 1: 0x%llx\n", result->addresses.migration_table1);
pr_info(" Migration Table 2: 0x%llx\n", result->addresses.migration_table2);
pr_info(" Entry Point: 0x%llx\n", result->addresses.entry_point);
}
EXPORT_SYMBOL_GPL(fw_analyzer_analyze);
EXPORT_SYMBOL_GPL(fw_analyzer_load_and_analyze);
EXPORT_SYMBOL_GPL(fw_analyzer_print_result);
MODULE_DESCRIPTION("GSP Firmware Analyzer");
MODULE_LICENSE("GPL");
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