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dmnt2: fix module name detection, add auto-break on hb nro launch

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This commit is contained in:
Michael Scire 2021-11-01 21:43:29 -07:00
parent 7e110ee8f7
commit d30af4763a
3 changed files with 50 additions and 13 deletions
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10
stratosphere/creport/source/creport_modules.cpp
View file

@ -27,7 +27,7 @@ namespace ams::creport {
struct ModulePath {
u32 zero;
u32 path_length;
s32 path_length;
char path[ModulePathLengthMax];
};
static_assert(sizeof(ModulePath) == 0x208, "ModulePath definition!");
@ -210,7 +210,7 @@ namespace ams::creport {
}
/* Also validate that we're looking at a valid name. */
if (rodata_start.module_path.zero != 0 || rodata_start.module_path.path_length != strnlen(rodata_start.module_path.path, sizeof(rodata_start.module_path.path))) {
if (rodata_start.module_path.zero != 0 || rodata_start.module_path.path_length <= 0)) {
return;
}
}
@ -219,7 +219,7 @@ namespace ams::creport {
/* Start after last slash in path. */
const char *path = rodata_start.module_path.path;
int ofs;
for (ofs = rodata_start.module_path.path_length; ofs >= 0; ofs--) {
for (ofs = std::min<size_t>(rodata_start.module_path.path_length, sizeof(rodata_start.module_path.path)); ofs >= 0; ofs--) {
if (path[ofs] == '/' || path[ofs] == '\\') {
break;
}
@ -227,8 +227,8 @@ namespace ams::creport {
ofs++;
/* Copy name to output. */
const size_t name_size = std::min(ModuleNameLengthMax, sizeof(rodata_start.module_path.path) - ofs);
std::strncpy(out_name, path + ofs, name_size);
const size_t name_size = std::min(ModuleNameLengthMax, std::min<size_t>(rodata_start.module_path.path_length, sizeof(rodata_start.module_path.path)) - ofs);
std::memcpy(out_name, path + ofs, name_size);
out_name[ModuleNameLengthMax - 1] = '\x00';
}

8
stratosphere/dmnt.gen2/source/dmnt2_debug_process.cpp
View file

@ -196,9 +196,11 @@ namespace ams::dmnt {
char path[ModuleDefinition::PathLengthMax];
} module_path;
if (R_SUCCEEDED(this->ReadMemory(std::addressof(module_path), memory_info.base_address + memory_info.size, sizeof(module_path)))) {
if (module_path.zero == 0 && module_path.path_length == util::Strnlen(module_path.path, sizeof(module_path.path))) {
std::memcpy(module_name, module_path.path, ModuleDefinition::PathLengthMax);
if (module_path.zero == 0 && module_path.path_length > 0) {
std::memcpy(module_name, module_path.path, std::min<size_t>(ModuleDefinition::PathLengthMax, module_path.path_length));
}
} else {
module_path.path_length = 0;
}
/* Truncate module name. */
@ -208,7 +210,7 @@ namespace ams::dmnt {
module.SetNameStart(0);
/* Ignore leading directories. */
for (size_t i = 0; i < static_cast<size_t>(module_path.path_length); ++i) {
for (size_t i = 0; i < std::min<size_t>(ModuleDefinition::PathLengthMax, module_path.path_length) && module_name[i] != 0; ++i) {
if (module_name[i] == '/' || module_name[i] == '\\') {
module.SetNameStart(i + 1);
}

45
stratosphere/dmnt.gen2/source/dmnt2_gdb_server_impl.cpp
View file

@ -947,6 +947,9 @@ namespace ams::dmnt {
void GdbServerImpl::ProcessDebugEvents() {
AMS_DMNT2_GDB_LOG_DEBUG("Processing debug events for %016lx\n", m_process_id.value);
u64 new_hb_nro_addr = 0;
u32 new_hb_nro_insn = 0;
while (true) {
/* Wait for an event to come in. */
const Result wait_result = [&] ALWAYS_INLINE_LAMBDA {
@ -1028,6 +1031,25 @@ namespace ams::dmnt {
/* Re-collect the process's modules. */
m_debug_process.CollectModules();
}
if (m_debug_process.GetOverrideStatus().IsHbl() && reason == svc::BreakReason_PostLoadDll) {
if (R_SUCCEEDED(m_debug_process.ReadMemory(std::addressof(new_hb_nro_insn), info.address, sizeof(new_hb_nro_insn)))) {
const u32 break_insn = SdkBreakPoint;
if (R_SUCCEEDED(m_debug_process.WriteMemory(std::addressof(break_insn), info.address, sizeof(break_insn)))) {
AMS_DMNT2_GDB_LOG_DEBUG("Set automatic break on new homebrew NRO (%lx, %lx)\n", info.address, info.size);
new_hb_nro_addr = info.address;
} else {
AMS_DMNT2_GDB_LOG_DEBUG("Failed to set automatic break on new homebrew NRO (%lx, %lx)\n", info.address, info.size);
}
} else {
AMS_DMNT2_GDB_LOG_DEBUG("Failed to read first insn on new homebrew NRO (%lx, %lx)\n", info.address, info.size);
}
}
/* This was just a notification, so we should continue. */
m_debug_process.Continue();
continue;
}
/* Check if we should automatically continue. */
@ -1074,6 +1096,8 @@ namespace ams::dmnt {
const u32 insn = d.info.exception.specific.undefined_instruction.insn;
u32 new_insn = 0;
bool is_new_hb_nro = false;
svc::ThreadContext ctx;
if (R_SUCCEEDED(m_debug_process.GetThreadContext(std::addressof(ctx), thread_id, svc::ThreadContextFlag_Control))) {
bool insn_changed = false;
@ -1115,6 +1139,19 @@ namespace ams::dmnt {
{
signal = GdbSignal_BreakpointTrap;
}
if (m_debug_process.GetOverrideStatus().IsHbl() && address == new_hb_nro_addr && insn == SdkBreakPoint) {
if (R_SUCCEEDED(m_debug_process.WriteMemory(std::addressof(new_hb_nro_insn), new_hb_nro_addr, sizeof(new_hb_nro_insn)))) {
AMS_DMNT2_GDB_LOG_DEBUG("Did automatic break on new homebrew NRO (%lx)\n", address);
new_hb_nro_addr = 0;
new_hb_nro_insn = 0;
is_new_hb_nro = true;
} else {
AMS_DMNT2_GDB_LOG_ERROR("Failed to restore instruction for new homebrew NRO (%lx)!\n", address);
}
}
}
if (insn_changed) {
@ -1128,7 +1165,7 @@ namespace ams::dmnt {
AMS_DMNT2_GDB_LOG_DEBUG("Non-SDK BreakPoint %lx, address=%p, insn=%08x\n", thread_id, reinterpret_cast<void *>(address), insn);
}
if (signal == GdbSignal_BreakpointTrap) {
if (signal == GdbSignal_BreakpointTrap && !is_new_hb_nro) {
SetReply(send_buffer, "T%02Xthread:p%lx.%lx;swbreak:;", static_cast<u32>(signal), m_process_id.value, thread_id);
reply = true;
}
@ -2049,8 +2086,6 @@ namespace ams::dmnt {
/* Note that we're attaching. */
SetReply(m_buffer, "Attach to 0x%lx.\n", m_wait_process_id.value);
} else if (ParsePrefix(command, "wait homebrew") || ParsePrefix(command, "wait hb")) {
SetReply(m_buffer, "[TODO] wait for next homebrew\n");
} else if (ParsePrefix(command, "wait ")) {
/* Allow optional "0x" prefix. */
ParsePrefix(command, "0x");
@ -2074,8 +2109,8 @@ namespace ams::dmnt {
AppendReply(m_reply_packet, ";qXfer:osdata:read+");
AppendReply(m_reply_packet, ";qXfer:features:read+");
AppendReply(m_reply_packet, ";qXfer:libraries:read+");
AppendReply(m_reply_packet, ";qXfer:libraries-svr4:read+");
AppendReply(m_reply_packet, ";augmented-libraries-svr4-read+");
// TODO: AppendReply(m_reply_packet, ";qXfer:libraries-svr4:read+");
// TODO: AppendReply(m_reply_packet, ";augmented-libraries-svr4-read+");
AppendReply(m_reply_packet, ";qXfer:threads:read+");
AppendReply(m_reply_packet, ";qXfer:exec-file:read+");
AppendReply(m_reply_packet, ";swbreak+");