apio
da2ede3450
Kernel: Implement a descriptor struct which stores the opened node and read offset, and give each task 8 of those. Implement three syscalls: sys_read, sys_open and sys_close (sys_write still writes to the console instead of using a fd, for now) Implement three new errors: ENOENT, EBADF and EMFILE. libc: Implement the new errors, and the new syscalls in syscall(). Also fix _RETURN_WITH_ERRNO() to set errno correctly, which was making strerror() return null, thus crashing perror(). userspace: make init demonstrate the new file API.
52 lines
1.2 KiB
C++
52 lines
1.2 KiB
C++
#include "trace/StackTracer.h"
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#include "memory/Memory.h"
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#include "std/stdio.h"
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#include "trace/Resolve.h"
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StackTracer::StackTracer()
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{
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asm("mov %%rbp, %0" : "=r"(m_base_pointer));
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}
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StackTracer::StackTracer(uintptr_t base_pointer) : m_base_pointer(base_pointer)
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{
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}
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typedef struct stackframe
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{
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struct stackframe* next;
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uintptr_t instruction;
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} stackframe;
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void StackTracer::trace()
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{
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stackframe* frame = (stackframe*)m_base_pointer;
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while (frame)
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{
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char symbol_name[512];
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get_symbol_name(frame->instruction, symbol_name);
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printf("%lx: %s\n", frame->instruction, symbol_name);
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frame = frame->next;
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}
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}
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void StackTracer::trace_with_ip(uintptr_t ip)
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{
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char symbol_name[512];
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get_symbol_name(ip, symbol_name);
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printf("%lx: %s\n", ip, symbol_name);
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trace();
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}
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bool stack_trace_contains(uintptr_t address)
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{
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uintptr_t base_pointer;
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asm volatile("mov %%rbp, %0" : "=r"(base_pointer));
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stackframe* frame = (stackframe*)base_pointer;
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while (Memory::is_kernel_address((uintptr_t)frame))
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{
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if (frame->instruction == address) return true;
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frame = frame->next;
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}
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return false;
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} |