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/////////////////////////////////////////////////////////////////////////
// $Id: linux.cc,v 1.5 2006/03/06 22:02:50 sshwarts Exp $
/////////////////////////////////////////////////////////////////////////
//
#include <stdio.h>
#include "bochs.h"
#include "cpu/cpu.h"
#if BX_DEBUGGER
#define LOG_THIS genlog->
// for Linux segment numbers
// these numbers are from <asm/segment.h>
#define KERNEL_CS 0x10
#define USER_CS 0x18
void bx_dbg_info_linux_command (void)
{
BX_INFO (("Info linux"));
bx_dbg_cpu_t cpu;
BX_CPU(dbg_cpu)->dbg_get_cpu(&cpu);
int mode;
if (cpu.cr0 & 1) {
// protected mode
if (cpu.cs.sel == KERNEL_CS) {
mode = 'k';
fprintf (stderr, "Processor mode: kernel\n");
} else if (cpu.cs.sel == USER_CS) {
fprintf (stderr, "Processor mode: user\n");
mode = 'u';
} else {
mode = '?';
fprintf (stderr, "Processor mode: ??? protected=1 but unrecognized CS\n");
}
} else {
mode = 'r';
fprintf (stderr, "Processor mode: real-address mode, maybe during boot sequence\n");
}
if (mode != 'u') return;
/* user mode, look through registers and memory to find our process ID */
#if 0
fprintf(stderr, "eax:0x%x\n", (unsigned) cpu.eax);
fprintf(stderr, "ebx:0x%x\n", (unsigned) cpu.ebx);
fprintf(stderr, "ecx:0x%x\n", (unsigned) cpu.ecx);
fprintf(stderr, "edx:0x%x\n", (unsigned) cpu.edx);
fprintf(stderr, "ebp:0x%x\n", (unsigned) cpu.ebp);
fprintf(stderr, "esi:0x%x\n", (unsigned) cpu.esi);
fprintf(stderr, "edi:0x%x\n", (unsigned) cpu.edi);
fprintf(stderr, "esp:0x%x\n", (unsigned) cpu.esp);
fprintf(stderr, "eflags:0x%x\n", (unsigned) cpu.eflags);
fprintf(stderr, "eip:0x%x\n", (unsigned) cpu.eip);
fprintf(stderr, "cs:s=0x%x, dl=0x%x, dh=0x%x, valid=%u\n",
(unsigned) cpu.cs.sel, (unsigned) cpu.cs.des_l,
(unsigned) cpu.cs.des_h, (unsigned) cpu.cs.valid);
fprintf(stderr, "ss:s=0x%x, dl=0x%x, dh=0x%x, valid=%u\n",
(unsigned) cpu.ss.sel, (unsigned) cpu.ss.des_l,
(unsigned) cpu.ss.des_h, (unsigned) cpu.ss.valid);
fprintf(stderr, "ds:s=0x%x, dl=0x%x, dh=0x%x, valid=%u\n",
(unsigned) cpu.ds.sel, (unsigned) cpu.ds.des_l,
(unsigned) cpu.ds.des_h, (unsigned) cpu.ds.valid);
fprintf(stderr, "es:s=0x%x, dl=0x%x, dh=0x%x, valid=%u\n",
(unsigned) cpu.es.sel, (unsigned) cpu.es.des_l,
(unsigned) cpu.es.des_h, (unsigned) cpu.es.valid);
fprintf(stderr, "fs:s=0x%x, dl=0x%x, dh=0x%x, valid=%u\n",
(unsigned) cpu.fs.sel, (unsigned) cpu.fs.des_l,
(unsigned) cpu.fs.des_h, (unsigned) cpu.fs.valid);
fprintf(stderr, "gs:s=0x%x, dl=0x%x, dh=0x%x, valid=%u\n",
(unsigned) cpu.gs.sel, (unsigned) cpu.gs.des_l,
(unsigned) cpu.gs.des_h, (unsigned) cpu.gs.valid);
fprintf(stderr, "ldtr:s=0x%x, dl=0x%x, dh=0x%x, valid=%u\n",
(unsigned) cpu.ldtr.sel, (unsigned) cpu.ldtr.des_l,
(unsigned) cpu.ldtr.des_h, (unsigned) cpu.ldtr.valid);
fprintf(stderr, "tr:s=0x%x, dl=0x%x, dh=0x%x, valid=%u\n",
(unsigned) cpu.tr.sel, (unsigned) cpu.tr.des_l,
(unsigned) cpu.tr.des_h, (unsigned) cpu.tr.valid);
fprintf(stderr, "gdtr:base=0x%x, limit=0x%x\n",
(unsigned) cpu.gdtr.base, (unsigned) cpu.gdtr.limit);
fprintf(stderr, "idtr:base=0x%x, limit=0x%x\n",
(unsigned) cpu.idtr.base, (unsigned) cpu.idtr.limit);
fprintf(stderr, "dr0:0x%x\n", (unsigned) cpu.dr0);
fprintf(stderr, "dr1:0x%x\n", (unsigned) cpu.dr1);
fprintf(stderr, "dr2:0x%x\n", (unsigned) cpu.dr2);
fprintf(stderr, "dr3:0x%x\n", (unsigned) cpu.dr3);
fprintf(stderr, "dr6:0x%x\n", (unsigned) cpu.dr6);
fprintf(stderr, "dr7:0x%x\n", (unsigned) cpu.dr7);
fprintf(stderr, "cr0:0x%x\n", (unsigned) cpu.cr0);
fprintf(stderr, "cr1:0x%x\n", (unsigned) cpu.cr1);
fprintf(stderr, "cr2:0x%x\n", (unsigned) cpu.cr2);
fprintf(stderr, "cr3:0x%x\n", (unsigned) cpu.cr3);
fprintf(stderr, "cr4:0x%x\n", (unsigned) cpu.cr4);
fprintf(stderr, "inhibit_mask:%u\n", cpu.inhibit_mask);
#endif
}
class syscall_names_t {
#define MAX_SYSCALLS 200
char *syscall_names_linux[MAX_SYSCALLS];
public:
syscall_names_t () { init (); }
void init ();
char *get_name (int num);
};
void syscall_names_t::init ()
{
for (int i=0; i<MAX_SYSCALLS; i++) {
syscall_names_linux[i] = "<unknown syscall>";
}
#define DEF_SYSCALL(num,name) syscall_names_linux[num] = name;
/* basically every line in the included file is a call to DEF_SYSCALL.
The preprocessor will turn each DEF_SYSCALL into an assignment
to syscall_names_linux[num]. */
#include "syscalls-linux.h"
/* now almost all the name entries have been initialized. If there
are any gaps, they still point to "<unknown syscall>". */
#if (N_SYSCALLS > MAX_SYSCALLS)
#error MAX_SYSCALLS must exceed N_SYSCALLS from syscalls-linux.h
#endif
}
char *syscall_names_t::get_name (int n)
{
static char buf[64];
if (n < 0 || n > N_SYSCALLS) {
sprintf (buf, "syscall %d out of range", n);
return buf;
}
return syscall_names_linux[n];
}
syscall_names_t syscall_names;
void bx_dbg_linux_syscall (unsigned which_cpu)
{
Bit32u eax = BX_CPU(which_cpu)->get_reg32(BX_32BIT_REG_EAX);
char *name = syscall_names.get_name (eax);
fprintf (stderr, "linux system call %s (#%d)\n", name, eax);
}
#endif /* if BX_DEBUGGER */
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