e61d00351f
in BRANCH-smp-bochs revisions. - The general task was to make multiple CPU's which communicate through their APICs. So instead of BX_CPU and BX_MEM, we now have BX_CPU(x) and BX_MEM(y). For an SMP simulation you have several processors in a shared memory space, so there might be processors BX_CPU(0..3) but only one memory space BX_MEM(0). For cosimulation, you could have BX_CPU(0) with BX_MEM(0), then BX_CPU(1) with BX_MEM(1). WARNING: Cosimulation is almost certainly broken by the SMP changes. - to simulate multiple CPUs, you have to give each CPU time to execute in turn. This is currently implemented using debugger guards. The cpu loop steps one CPU for a few instructions, then steps the next CPU for a few instructions, etc. - there is some limited support in the debugger for two CPUs, for example printing information from each CPU when single stepping.
159 lines
5.1 KiB
C++
159 lines
5.1 KiB
C++
#include <stdio.h>
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#include "bochs.h"
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#define LOG_THIS genlog->
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// for Linux segment numbers
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// these numbers are from <asm/segment.h>
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#define KERNEL_CS 0x10
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#define USER_CS 0x18
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void
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bx_dbg_info_linux_command (void)
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{
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BX_INFO (("Info linux\n"));
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bx_dbg_cpu_t cpu;
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bx_dbg_callback[0].get_cpu(&cpu);
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int mode;
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if (cpu.cr0 & 1) {
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// protected mode
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if (cpu.cs.sel == KERNEL_CS) {
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mode = 'k';
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fprintf (stderr, "Processor mode: kernel\n");
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} else if (cpu.cs.sel == USER_CS) {
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fprintf (stderr, "Processor mode: user\n");
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mode = 'u';
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} else {
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mode = '?';
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fprintf (stderr, "Processor mode: ??? protected=1 but unrecognized CS\n");
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}
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} else {
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mode = 'r';
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fprintf (stderr, "Processor mode: real-address mode, maybe during boot sequence\n");
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}
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if (mode != 'u') return;
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/* user mode, look through registers and memory to find our process ID */
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#if 0
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fprintf(stderr, "eax:0x%x\n", (unsigned) cpu.eax);
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fprintf(stderr, "ebx:0x%x\n", (unsigned) cpu.ebx);
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fprintf(stderr, "ecx:0x%x\n", (unsigned) cpu.ecx);
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fprintf(stderr, "edx:0x%x\n", (unsigned) cpu.edx);
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fprintf(stderr, "ebp:0x%x\n", (unsigned) cpu.ebp);
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fprintf(stderr, "esi:0x%x\n", (unsigned) cpu.esi);
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fprintf(stderr, "edi:0x%x\n", (unsigned) cpu.edi);
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fprintf(stderr, "esp:0x%x\n", (unsigned) cpu.esp);
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fprintf(stderr, "eflags:0x%x\n", (unsigned) cpu.eflags);
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fprintf(stderr, "eip:0x%x\n", (unsigned) cpu.eip);
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fprintf(stderr, "cs:s=0x%x, dl=0x%x, dh=0x%x, valid=%u\n",
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(unsigned) cpu.cs.sel, (unsigned) cpu.cs.des_l,
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(unsigned) cpu.cs.des_h, (unsigned) cpu.cs.valid);
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fprintf(stderr, "ss:s=0x%x, dl=0x%x, dh=0x%x, valid=%u\n",
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(unsigned) cpu.ss.sel, (unsigned) cpu.ss.des_l,
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(unsigned) cpu.ss.des_h, (unsigned) cpu.ss.valid);
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fprintf(stderr, "ds:s=0x%x, dl=0x%x, dh=0x%x, valid=%u\n",
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(unsigned) cpu.ds.sel, (unsigned) cpu.ds.des_l,
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(unsigned) cpu.ds.des_h, (unsigned) cpu.ds.valid);
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fprintf(stderr, "es:s=0x%x, dl=0x%x, dh=0x%x, valid=%u\n",
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(unsigned) cpu.es.sel, (unsigned) cpu.es.des_l,
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(unsigned) cpu.es.des_h, (unsigned) cpu.es.valid);
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fprintf(stderr, "fs:s=0x%x, dl=0x%x, dh=0x%x, valid=%u\n",
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(unsigned) cpu.fs.sel, (unsigned) cpu.fs.des_l,
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(unsigned) cpu.fs.des_h, (unsigned) cpu.fs.valid);
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fprintf(stderr, "gs:s=0x%x, dl=0x%x, dh=0x%x, valid=%u\n",
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(unsigned) cpu.gs.sel, (unsigned) cpu.gs.des_l,
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(unsigned) cpu.gs.des_h, (unsigned) cpu.gs.valid);
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fprintf(stderr, "ldtr:s=0x%x, dl=0x%x, dh=0x%x, valid=%u\n",
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(unsigned) cpu.ldtr.sel, (unsigned) cpu.ldtr.des_l,
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(unsigned) cpu.ldtr.des_h, (unsigned) cpu.ldtr.valid);
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fprintf(stderr, "tr:s=0x%x, dl=0x%x, dh=0x%x, valid=%u\n",
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(unsigned) cpu.tr.sel, (unsigned) cpu.tr.des_l,
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(unsigned) cpu.tr.des_h, (unsigned) cpu.tr.valid);
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fprintf(stderr, "gdtr:base=0x%x, limit=0x%x\n",
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(unsigned) cpu.gdtr.base, (unsigned) cpu.gdtr.limit);
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fprintf(stderr, "idtr:base=0x%x, limit=0x%x\n",
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(unsigned) cpu.idtr.base, (unsigned) cpu.idtr.limit);
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fprintf(stderr, "dr0:0x%x\n", (unsigned) cpu.dr0);
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fprintf(stderr, "dr1:0x%x\n", (unsigned) cpu.dr1);
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fprintf(stderr, "dr2:0x%x\n", (unsigned) cpu.dr2);
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fprintf(stderr, "dr3:0x%x\n", (unsigned) cpu.dr3);
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fprintf(stderr, "dr6:0x%x\n", (unsigned) cpu.dr6);
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fprintf(stderr, "dr7:0x%x\n", (unsigned) cpu.dr7);
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fprintf(stderr, "tr3:0x%x\n", (unsigned) cpu.tr3);
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fprintf(stderr, "tr4:0x%x\n", (unsigned) cpu.tr4);
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fprintf(stderr, "tr5:0x%x\n", (unsigned) cpu.tr5);
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fprintf(stderr, "tr6:0x%x\n", (unsigned) cpu.tr6);
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fprintf(stderr, "tr7:0x%x\n", (unsigned) cpu.tr7);
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fprintf(stderr, "cr0:0x%x\n", (unsigned) cpu.cr0);
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fprintf(stderr, "cr1:0x%x\n", (unsigned) cpu.cr1);
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fprintf(stderr, "cr2:0x%x\n", (unsigned) cpu.cr2);
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fprintf(stderr, "cr3:0x%x\n", (unsigned) cpu.cr3);
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fprintf(stderr, "cr4:0x%x\n", (unsigned) cpu.cr4);
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fprintf(stderr, "inhibit_mask:%u\n", cpu.inhibit_mask);
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#endif
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}
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class syscall_names_t {
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#define MAX_SYSCALLS 200
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char *syscall_names_linux[MAX_SYSCALLS];
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public:
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syscall_names_t () { init (); }
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void init ();
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char *get_name (int num);
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};
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void
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syscall_names_t::init ()
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{
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for (int i=0; i<MAX_SYSCALLS; i++) {
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syscall_names_linux[i] = "<unknown syscall>";
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}
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#define DEF_SYSCALL(num,name) syscall_names_linux[num] = name;
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/* basically every line in the included file is a call to DEF_SYSCALL.
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The preprocessor will turn each DEF_SYSCALL into an assignment
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to syscall_names_linux[num]. */
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#include "syscalls-linux.h"
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/* now almost all the name entries have been initialized. If there
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are any gaps, they still point to "<unknown syscall>". */
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#if (N_SYSCALLS > MAX_SYSCALLS)
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#error MAX_SYSCALLS must exceed N_SYSCALLS from syscalls-linux.h
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#endif
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}
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char *
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syscall_names_t::get_name (int n)
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{
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static char buf[64];
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if (n < 0 || n > N_SYSCALLS) {
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sprintf (buf, "syscall %d out of range", n);
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return buf;
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}
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return syscall_names_linux[n];
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}
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syscall_names_t syscall_names;
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void bx_dbg_linux_syscall () {
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bx_dbg_cpu_t cpu;
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bx_dbg_callback[0].get_cpu(&cpu);
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char *name = syscall_names.get_name (cpu.eax);
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fprintf (stderr, "linux system call %s (#%d)\n", name, cpu.eax);
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}
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