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creport: Implement reading name/build id from .rodata
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parent
f189610af8
commit
92bc396972
2 changed files with 57 additions and 2 deletions
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@ -1,4 +1,5 @@
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#include <switch.h>
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#include <cstring>
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#include "creport_code_info.hpp"
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@ -19,7 +20,11 @@ void CodeList::ReadCodeRegionsFromProcess(Handle debug_handle, u64 pc, u64 lr) {
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}
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if (mi.perm == Perm_Rx) {
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/* TODO: Parse CodeInfo. */
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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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@ -59,4 +64,52 @@ bool CodeList::TryFindCodeRegion(Handle debug_handle, u64 guess, u64 *address) {
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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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}
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@ -5,7 +5,7 @@
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struct CodeInfo {
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char name[0x20];
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u8 id[0x20];
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u8 build_id[0x20];
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u64 start_address;
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u64 end_address;
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};
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@ -21,4 +21,6 @@ class CodeList {
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void ReadCodeRegionsFromProcess(Handle debug_handle, u64 pc, u64 lr);
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private:
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bool TryFindCodeRegion(Handle debug_handle, u64 guess, u64 *address);
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void GetCodeInfoName(u64 debug_handle, u64 ro_address, char *name);
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void GetCodeInfoBuildId(u64 debug_handle, u64 ro_address, u8 *build_id);
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};
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