11a53e792f
There are a lot of under the hood changes here: - Move syscalls to be a dispatch table, defined by syscalls.inc - Don't need a full process state (push_all) in syscalls now - In push_all, define REGS instead of using offsets - Save TWO stack pointers as well as current saved stack pointer in TCB: - rsp0 is the base of the kernel stack for interrupts - rsp3 is the saved user stack from cpu_data - Update syscall numbers in nulldrv - Some asm-debugging enhancements to the gdb script - fork() still not working
82 lines
1.6 KiB
C++
82 lines
1.6 KiB
C++
#include "console.h"
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#include "cpu.h"
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#include "debug.h"
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#include "gdt.h"
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#include "page_manager.h"
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size_t __counter_syscall_enter = 0;
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size_t __counter_syscall_sysret = 0;
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void
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print_regs(const cpu_state ®s)
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{
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console *cons = console::get();
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uint64_t cr2 = 0;
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__asm__ __volatile__ ("mov %%cr2, %0" : "=r"(cr2));
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print_regL("rax", regs.rax);
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print_regM("rbx", regs.rbx);
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print_regR("rcx", regs.rcx);
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print_regL("rdx", regs.rdx);
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print_regM("rdi", regs.rdi);
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print_regR("rsi", regs.rsi);
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cons->puts("\n");
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print_regL(" r8", regs.r8);
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print_regM(" r9", regs.r9);
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print_regR("r10", regs.r10);
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print_regL("r11", regs.r11);
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print_regM("r12", regs.r12);
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print_regR("r13", regs.r13);
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print_regL("r14", regs.r14);
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print_regM("r15", regs.r15);
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cons->puts("\n\n");
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print_regL("rbp", regs.rbp);
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print_regM("rsp", regs.user_rsp);
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print_regR("sp0", bsp_cpu_data.rsp0);
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print_regL("rip", regs.rip);
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print_regM("cr3", page_manager::get()->get_pml4());
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print_regR("cr2", cr2);
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cons->puts("\n");
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}
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struct frame
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{
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frame *prev;
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uintptr_t return_addr;
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};
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void
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print_stacktrace(int skip)
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{
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console *cons = console::get();
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frame *fp = nullptr;
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int fi = -skip;
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__asm__ __volatile__ ( "mov %%rbp, %0" : "=r" (fp) );
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while (fp && fp->return_addr) {
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if (fi++ >= 0)
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cons->printf(" frame %2d: %lx\n", fi-1, fp->return_addr);
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fp = fp->prev;
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}
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}
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void
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print_stack(const cpu_state ®s)
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{
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console *cons = console::get();
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cons->puts("\nStack:\n");
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uint64_t sp = regs.user_rsp;
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while (sp <= regs.rbp) {
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cons->printf("%016x: %016x\n", sp, *reinterpret_cast<uint64_t *>(sp));
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sp += sizeof(uint64_t);
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}
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}
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