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Unbreak ksym loading and make reading /proc/PID/stack not crash.

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This commit is contained in:
Andreas Kling 2019-01-01 02:20:01 +01:00
parent 683185e4aa
commit 4b6a8f8a08
7 changed files with 7 additions and 10 deletions
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4
Kernel/KSyms.cpp
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@ -91,13 +91,13 @@ void dump_backtrace(bool use_ksyms)
};
Vector<RecognizedSymbol> recognized_symbols;
if (use_ksyms) {
for (dword* stackPtr = (dword*)&use_ksyms; current->isValidAddressForKernel(LinearAddress((dword)stackPtr)); stackPtr = (dword*)*stackPtr) {
for (dword* stackPtr = (dword*)&use_ksyms; current->validate_read_from_kernel(LinearAddress((dword)stackPtr)); stackPtr = (dword*)*stackPtr) {
dword retaddr = stackPtr[1];
if (auto* ksym = ksymbolicate(retaddr))
recognized_symbols.append({ retaddr, ksym });
}
} else{
for (dword* stackPtr = (dword*)&use_ksyms; current->isValidAddressForKernel(LinearAddress((dword)stackPtr)); stackPtr = (dword*)*stackPtr) {
for (dword* stackPtr = (dword*)&use_ksyms; current->validate_read_from_kernel(LinearAddress((dword)stackPtr)); stackPtr = (dword*)*stackPtr) {
dword retaddr = stackPtr[1];
kprintf("%x (next: %x)\n", retaddr, stackPtr ? (dword*)*stackPtr : 0);
}