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Add a very hackish /proc/PID/stack.

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It walks the stack and identifies anything that looks like a kernel symbol.
This could be a lot more sophisticated.
This commit is contained in:
Andreas Kling 2018-10-26 22:32:35 +02:00
parent 81627cf7d5
commit c928b06218
14 changed files with 130 additions and 13 deletions
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12
Kernel/Task.cpp
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@ -378,21 +378,21 @@ Task::Task(String&& name, uid_t uid, gid_t gid, pid_t parentPID, RingLevel ring)
// FIXME: This memory is leaked.
// But uh, there's also no kernel task termination, so I guess it's not technically leaked...
dword stackBottom = (dword)kmalloc(defaultStackSize);
m_stackTop = (stackBottom + defaultStackSize) & 0xffffff8;
m_tss.esp = m_stackTop;
m_stackTop0 = (stackBottom + defaultStackSize) & 0xffffff8;
m_tss.esp = m_stackTop0;
} else {
auto* region = allocateRegion(defaultStackSize, "stack");
ASSERT(region);
m_stackTop = region->linearAddress.offset(defaultStackSize).get() & 0xfffffff8;
m_stackTop3 = region->linearAddress.offset(defaultStackSize).get() & 0xfffffff8;
m_tss.esp = m_stackTop3;
}
m_tss.esp = m_stackTop;
if (isRing3()) {
// Ring3 tasks need a separate stack for Ring0.
m_kernelStack = kmalloc(defaultStackSize);
DWORD ring0StackTop = ((DWORD)m_kernelStack + defaultStackSize) & 0xffffff8;
m_stackTop0 = ((DWORD)m_kernelStack + defaultStackSize) & 0xffffff8;
m_tss.ss0 = 0x10;
m_tss.esp0 = ring0StackTop;
m_tss.esp0 = m_stackTop0;
}
// HACK: Ring2 SS in the TSS is the current PID.