mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
synced 2024-11-10 14:11:43 +00:00
115 lines
No EOL
3.7 KiB
C++
115 lines
No EOL
3.7 KiB
C++
#include <switch.h>
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#include <cstring>
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#include "creport_code_info.hpp"
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void CodeList::ReadCodeRegionsFromProcess(Handle debug_handle, u64 pc, u64 lr) {
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u64 code_base;
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/* Guess that either PC or LR will point to a code region. This could be false. */
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if (!TryFindCodeRegion(debug_handle, pc, &code_base) && !TryFindCodeRegion(debug_handle, lr, &code_base)) {
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return;
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}
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u64 cur_ptr = code_base;
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while (this->code_count < max_code_count) {
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MemoryInfo mi;
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u32 pi;
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if (R_FAILED(svcQueryDebugProcessMemory(&mi, &pi, debug_handle, cur_ptr))) {
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break;
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}
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if (mi.perm == Perm_Rx) {
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/* Parse CodeInfo. */
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this->code_infos[this->code_count].start_address = mi.addr;
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this->code_infos[this->code_count].end_address = mi.addr + mi.size;
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GetCodeInfoName(debug_handle, mi.addr + mi.size, this->code_infos[this->code_count].name);
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GetCodeInfoBuildId(debug_handle, mi.addr + mi.size, this->code_infos[this->code_count].build_id);
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this->code_count++;
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}
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/* If we're out of readable memory, we're done reading code. */
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if (mi.type == MemType_Unmapped || mi.type == MemType_Reserved) {
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break;
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}
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/* Verify we're not getting stuck in an infinite loop. */
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if (mi.size == 0 || U64_MAX - mi.size <= cur_ptr) {
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break;
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}
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cur_ptr += mi.size;
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}
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}
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bool CodeList::TryFindCodeRegion(Handle debug_handle, u64 guess, u64 *address) {
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MemoryInfo mi;
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u32 pi;
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if (R_FAILED(svcQueryDebugProcessMemory(&mi, &pi, debug_handle, guess)) || mi.perm != Perm_Rx) {
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return false;
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}
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/* Iterate backwards until we find the memory before the code region. */
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while (mi.addr > 0) {
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if (R_FAILED(svcQueryDebugProcessMemory(&mi, &pi, debug_handle, guess))) {
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return false;
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}
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if (mi.type == MemType_Unmapped) {
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/* Code region will be at the end of the unmapped region preceding it. */
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*address = mi.addr + mi.size;
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return true;
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}
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guess -= 4;
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}
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return false;
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}
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void CodeList::GetCodeInfoName(u64 debug_handle, u64 rodata_addr, char *name) {
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char name_in_proc[0x200];
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/* Clear name. */
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memset(name, 0, 0x20);
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/* Read name out of .rodata. */
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if (R_FAILED(svcReadDebugProcessMemory(name_in_proc, debug_handle, rodata_addr + 8, sizeof(name_in_proc)))) {
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return;
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}
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/* Start after last slash in path. */
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int ofs = strnlen(name_in_proc, sizeof(name_in_proc));
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while (ofs >= 0 && name_in_proc[ofs] != '/' && name_in_proc[ofs] != '\\') {
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ofs--;
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}
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strncpy(name, name_in_proc + ofs + 1, 0x20);
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name[0x1F] = '\x00';
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}
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void CodeList::GetCodeInfoBuildId(u64 debug_handle, u64 rodata_addr, u8 *build_id) {
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MemoryInfo mi;
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u32 pi;
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/* Clear build id. */
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memset(build_id, 0, 0x20);
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/* Verify .rodata is read-only. */
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if (R_FAILED(svcQueryDebugProcessMemory(&mi, &pi, debug_handle, rodata_addr)) || mi.perm != Perm_R) {
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return;
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}
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/* We want to read the last two pages of .rodata. */
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u8 last_pages[0x2000];
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size_t last_pages_size = mi.size >= 0x2000 ? 0x2000 : 0x1000;
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if (R_FAILED(svcReadDebugProcessMemory(last_pages, debug_handle, mi.addr + mi.size - last_pages_size, last_pages_size))) {
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return;
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}
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/* Find GNU\x00 to locate start of Build ID. */
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for (int ofs = last_pages_size - 0x24; ofs >= 0; ofs--) {
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if (memcmp(last_pages + ofs, "GNU\x00", 4) == 0) {
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memcpy(build_id, last_pages + ofs + 4, 0x20);
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}
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}
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} |