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Code Issues Releases Activity

kern/creport: use mod0 to locate symbol table for all modules

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This commit is contained in:
Michael Scire 2024-09-24 13:15:21 -07:00
parent 009f581721
commit 10c7a39528
2 changed files with 26 additions and 53 deletions
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41
libraries/libmesosphere/source/arch/arm64/kern_k_debug.cpp
View file

@ -623,11 +623,6 @@ namespace ams::kern::arch::arm64 {
}
}
/* Read the first instruction. */
if (!ReadValue(std::addressof(temp_32), process, base_address)) {
return PrintAddress(address);
}
/* Get the module name. */
char module_name[0x20];
const bool has_module_name = GetModuleName(module_name, sizeof(module_name), process, base_address);
@ -637,36 +632,32 @@ namespace ams::kern::arch::arm64 {
return PrintAddressWithModuleName(address, has_module_name, module_name, base_address);
}
if (temp_32 == 0) {
/* Module is dynamically loaded by rtld. */
/* Locate .dyn using rocrt::ModuleHeader. */
{
/* Determine the ModuleHeader offset. */
u32 mod_offset;
if (!ReadValue(std::addressof(mod_offset), process, base_address + sizeof(u32))) {
return PrintAddressWithModuleName(address, has_module_name, module_name, base_address);
}
if (!ReadValue(std::addressof(temp_32), process, base_address + mod_offset)) {
/* Read the signature. */
constexpr u32 SignatureFieldOffset = AMS_OFFSETOF(rocrt::ModuleHeader, signature);
if (!ReadValue(std::addressof(temp_32), process, base_address + mod_offset + SignatureFieldOffset)) {
return PrintAddressWithModuleName(address, has_module_name, module_name, base_address);
}
if (temp_32 != 0x30444F4D) { /* MOD0 */
/* Check that the module signature is expected. */
if (temp_32 != rocrt::ModuleHeaderVersion) { /* MOD0 */
return PrintAddressWithModuleName(address, has_module_name, module_name, base_address);
}
if (!ReadValue(std::addressof(temp_32), process, base_address + mod_offset + sizeof(u32))) {
/* Determine the dynamic offset. */
constexpr u32 DynamicFieldOffset = AMS_OFFSETOF(rocrt::ModuleHeader, dynamic_offset);
if (!ReadValue(std::addressof(temp_32), process, base_address + mod_offset + DynamicFieldOffset)) {
return PrintAddressWithModuleName(address, has_module_name, module_name, base_address);
}
dyn_address = base_address + mod_offset + temp_32;
} else if (temp_32 == 0x14000002) {
/* Module embeds rtld. */
if (!ReadValue(std::addressof(temp_32), process, base_address + 0x5C)) {
return PrintAddressWithModuleName(address, has_module_name, module_name, base_address);
}
if (temp_32 != 0x94000002) {
return PrintAddressWithModuleName(address, has_module_name, module_name, base_address);
}
if (!ReadValue(std::addressof(temp_32), process, base_address + 0x60)) {
return PrintAddressWithModuleName(address, has_module_name, module_name, base_address);
}
dyn_address = base_address + 0x60 + temp_32;
} else {
return PrintAddressWithModuleName(address, has_module_name, module_name, base_address);
dyn_address = module.start_address + mod_offset + temp_32;
}
/* Locate tables inside .dyn. */

38
stratosphere/creport/source/creport_modules.cpp
View file

@ -282,56 +282,38 @@ namespace ams::creport {
return;
}
/* Read the first instruction of .text. */
if (R_FAILED(svc::ReadDebugProcessMemory(reinterpret_cast<uintptr_t>(std::addressof(temp_32)), m_debug_handle, module.start_address, sizeof(temp_32)))) {
return;
}
/* We want to find the symbol table/.dynamic. */
uintptr_t dyn_address = 0;
uintptr_t sym_tab = 0;
uintptr_t str_tab = 0;
size_t num_sym = 0;
/* Detect module type. */
if (temp_32 == 0) {
/* Module is dynamically loaded by rtld. */
/* Locate .dyn using rocrt::ModuleHeader. */
{
/* Determine the ModuleHeader offset. */
u32 mod_offset;
if (R_FAILED(svc::ReadDebugProcessMemory(reinterpret_cast<uintptr_t>(std::addressof(mod_offset)), m_debug_handle, module.start_address + sizeof(u32), sizeof(u32)))) {
return;
}
if (R_FAILED(svc::ReadDebugProcessMemory(reinterpret_cast<uintptr_t>(std::addressof(temp_32)), m_debug_handle, module.start_address + mod_offset, sizeof(u32)))) {
/* Read the signature. */
constexpr u32 SignatureFieldOffset = AMS_OFFSETOF(rocrt::ModuleHeader, signature);
if (R_FAILED(svc::ReadDebugProcessMemory(reinterpret_cast<uintptr_t>(std::addressof(temp_32)), m_debug_handle, module.start_address + mod_offset + SignatureFieldOffset, sizeof(u32)))) {
return;
}
/* Check that the module signature is expected. */
if (temp_32 != rocrt::ModuleHeaderVersion) { /* MOD0 */
return;
}
if (R_FAILED(svc::ReadDebugProcessMemory(reinterpret_cast<uintptr_t>(std::addressof(temp_32)), m_debug_handle, module.start_address + mod_offset + sizeof(u32), sizeof(u32)))) {
/* Determine the dynamic offset. */
constexpr u32 DynamicFieldOffset = AMS_OFFSETOF(rocrt::ModuleHeader, dynamic_offset);
if (R_FAILED(svc::ReadDebugProcessMemory(reinterpret_cast<uintptr_t>(std::addressof(temp_32)), m_debug_handle, module.start_address + mod_offset + DynamicFieldOffset, sizeof(u32)))) {
return;
}
dyn_address = module.start_address + mod_offset + temp_32;
} else if (temp_32 == 0x14000002) {
/* Module embeds rtld. */
if (R_FAILED(svc::ReadDebugProcessMemory(reinterpret_cast<uintptr_t>(std::addressof(temp_32)), m_debug_handle, module.start_address + 0x5C, sizeof(u32)))) {
return;
}
if (temp_32 != 0x94000002) {
return;
}
if (R_FAILED(svc::ReadDebugProcessMemory(reinterpret_cast<uintptr_t>(std::addressof(temp_32)), m_debug_handle, module.start_address + 0x60, sizeof(u32)))) {
return;
}
dyn_address = module.start_address + 0x60 + temp_32;
} else {
/* Module has unknown format. */
return;
}