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qemu-e2k/linux-user/main.c
bellard 9fddaa0c0c PowerPC merge: real time TB and decrementer - faster and simpler exception handling (Jocelyn Mayer) 
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@841 c046a42c-6fe2-441c-8c8c-71466251a162
2004-05-21 12:59:32 +00:00

1142 lines
35 KiB
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/*
* qemu user main
*
* Copyright (c) 2003 Fabrice Bellard
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <stdlib.h>
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include "qemu.h"
#define DEBUG_LOGFILE "/tmp/qemu.log"
static const char *interp_prefix = CONFIG_QEMU_PREFIX;
#if defined(__i386__) && !defined(CONFIG_STATIC)
/* Force usage of an ELF interpreter even if it is an ELF shared
object ! */
const char interp[] __attribute__((section(".interp"))) = "/lib/ld-linux.so.2";
#endif
/* for recent libc, we add these dummy symbols which are not declared
when generating a linked object (bug in ld ?) */
#if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 3)
long __preinit_array_start[0];
long __preinit_array_end[0];
long __init_array_start[0];
long __init_array_end[0];
long __fini_array_start[0];
long __fini_array_end[0];
#endif
/* XXX: on x86 MAP_GROWSDOWN only works if ESP <= address + 32, so
we allocate a bigger stack. Need a better solution, for example
by remapping the process stack directly at the right place */
unsigned long x86_stack_size = 512 * 1024;
void gemu_log(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
vfprintf(stderr, fmt, ap);
va_end(ap);
}
void cpu_outb(CPUState *env, int addr, int val)
{
fprintf(stderr, "outb: port=0x%04x, data=%02x\n", addr, val);
}
void cpu_outw(CPUState *env, int addr, int val)
{
fprintf(stderr, "outw: port=0x%04x, data=%04x\n", addr, val);
}
void cpu_outl(CPUState *env, int addr, int val)
{
fprintf(stderr, "outl: port=0x%04x, data=%08x\n", addr, val);
}
int cpu_inb(CPUState *env, int addr)
{
fprintf(stderr, "inb: port=0x%04x\n", addr);
return 0;
}
int cpu_inw(CPUState *env, int addr)
{
fprintf(stderr, "inw: port=0x%04x\n", addr);
return 0;
}
int cpu_inl(CPUState *env, int addr)
{
fprintf(stderr, "inl: port=0x%04x\n", addr);
return 0;
}
int cpu_get_pic_interrupt(CPUState *env)
{
return -1;
}
/* timers for rdtsc */
#if defined(__i386__)
int64_t cpu_get_real_ticks(void)
{
int64_t val;
asm volatile ("rdtsc" : "=A" (val));
return val;
}
#elif defined(__x86_64__)
int64_t cpu_get_real_ticks(void)
{
uint32_t low,high;
int64_t val;
asm volatile("rdtsc" : "=a" (low), "=d" (high));
val = high;
val <<= 32;
val |= low;
return val;
}
#else
static uint64_t emu_time;
int64_t cpu_get_real_ticks(void)
{
return emu_time++;
}
#endif
#ifdef TARGET_I386
/***********************************************************/
/* CPUX86 core interface */
uint64_t cpu_get_tsc(CPUX86State *env)
{
return cpu_get_real_ticks();
}
static void write_dt(void *ptr, unsigned long addr, unsigned long limit,
int flags)
{
unsigned int e1, e2;
e1 = (addr << 16) | (limit & 0xffff);
e2 = ((addr >> 16) & 0xff) | (addr & 0xff000000) | (limit & 0x000f0000);
e2 |= flags;
stl((uint8_t *)ptr, e1);
stl((uint8_t *)ptr + 4, e2);
}
static void set_gate(void *ptr, unsigned int type, unsigned int dpl,
unsigned long addr, unsigned int sel)
{
unsigned int e1, e2;
e1 = (addr & 0xffff) | (sel << 16);
e2 = (addr & 0xffff0000) | 0x8000 | (dpl << 13) | (type << 8);
stl((uint8_t *)ptr, e1);
stl((uint8_t *)ptr + 4, e2);
}
uint64_t gdt_table[6];
uint64_t idt_table[256];
/* only dpl matters as we do only user space emulation */
static void set_idt(int n, unsigned int dpl)
{
set_gate(idt_table + n, 0, dpl, 0, 0);
}
void cpu_loop(CPUX86State *env)
{
int trapnr;
uint8_t *pc;
target_siginfo_t info;
for(;;) {
trapnr = cpu_x86_exec(env);
switch(trapnr) {
case 0x80:
/* linux syscall */
env->regs[R_EAX] = do_syscall(env,
env->regs[R_EAX],
env->regs[R_EBX],
env->regs[R_ECX],
env->regs[R_EDX],
env->regs[R_ESI],
env->regs[R_EDI],
env->regs[R_EBP]);
break;
case EXCP0B_NOSEG:
case EXCP0C_STACK:
info.si_signo = SIGBUS;
info.si_errno = 0;
info.si_code = TARGET_SI_KERNEL;
info._sifields._sigfault._addr = 0;
queue_signal(info.si_signo, &info);
break;
case EXCP0D_GPF:
if (env->eflags & VM_MASK) {
handle_vm86_fault(env);
} else {
info.si_signo = SIGSEGV;
info.si_errno = 0;
info.si_code = TARGET_SI_KERNEL;
info._sifields._sigfault._addr = 0;
queue_signal(info.si_signo, &info);
}
break;
case EXCP0E_PAGE:
info.si_signo = SIGSEGV;
info.si_errno = 0;
if (!(env->error_code & 1))
info.si_code = TARGET_SEGV_MAPERR;
else
info.si_code = TARGET_SEGV_ACCERR;
info._sifields._sigfault._addr = env->cr[2];
queue_signal(info.si_signo, &info);
break;
case EXCP00_DIVZ:
if (env->eflags & VM_MASK) {
handle_vm86_trap(env, trapnr);
} else {
/* division by zero */
info.si_signo = SIGFPE;
info.si_errno = 0;
info.si_code = TARGET_FPE_INTDIV;
info._sifields._sigfault._addr = env->eip;
queue_signal(info.si_signo, &info);
}
break;
case EXCP01_SSTP:
case EXCP03_INT3:
if (env->eflags & VM_MASK) {
handle_vm86_trap(env, trapnr);
} else {
info.si_signo = SIGTRAP;
info.si_errno = 0;
if (trapnr == EXCP01_SSTP) {
info.si_code = TARGET_TRAP_BRKPT;
info._sifields._sigfault._addr = env->eip;
} else {
info.si_code = TARGET_SI_KERNEL;
info._sifields._sigfault._addr = 0;
}
queue_signal(info.si_signo, &info);
}
break;
case EXCP04_INTO:
case EXCP05_BOUND:
if (env->eflags & VM_MASK) {
handle_vm86_trap(env, trapnr);
} else {
info.si_signo = SIGSEGV;
info.si_errno = 0;
info.si_code = TARGET_SI_KERNEL;
info._sifields._sigfault._addr = 0;
queue_signal(info.si_signo, &info);
}
break;
case EXCP06_ILLOP:
info.si_signo = SIGILL;
info.si_errno = 0;
info.si_code = TARGET_ILL_ILLOPN;
info._sifields._sigfault._addr = env->eip;
queue_signal(info.si_signo, &info);
break;
case EXCP_INTERRUPT:
/* just indicate that signals should be handled asap */
break;
default:
pc = env->segs[R_CS].base + env->eip;
fprintf(stderr, "qemu: 0x%08lx: unhandled CPU exception 0x%x - aborting\n",
(long)pc, trapnr);
abort();
}
process_pending_signals(env);
}
}
#endif
#ifdef TARGET_ARM
/* XXX: find a better solution */
extern void tb_invalidate_page_range(target_ulong start, target_ulong end);
static void arm_cache_flush(target_ulong start, target_ulong last)
{
target_ulong addr, last1;
if (last < start)
return;
addr = start;
for(;;) {
last1 = ((addr + TARGET_PAGE_SIZE) & TARGET_PAGE_MASK) - 1;
if (last1 > last)
last1 = last;
tb_invalidate_page_range(addr, last1 + 1);
if (last1 == last)
break;
addr = last1 + 1;
}
}
void cpu_loop(CPUARMState *env)
{
int trapnr;
unsigned int n, insn;
target_siginfo_t info;
for(;;) {
trapnr = cpu_arm_exec(env);
switch(trapnr) {
case EXCP_UDEF:
{
TaskState *ts = env->opaque;
uint32_t opcode;
/* we handle the FPU emulation here, as Linux */
/* we get the opcode */
opcode = ldl_raw((uint8_t *)env->regs[15]);
if (EmulateAll(opcode, &ts->fpa, env->regs) == 0) {
info.si_signo = SIGILL;
info.si_errno = 0;
info.si_code = TARGET_ILL_ILLOPN;
info._sifields._sigfault._addr = env->regs[15];
queue_signal(info.si_signo, &info);
} else {
/* increment PC */
env->regs[15] += 4;
}
}
break;
case EXCP_SWI:
{
/* system call */
insn = ldl((void *)(env->regs[15] - 4));
n = insn & 0xffffff;
if (n == ARM_NR_cacheflush) {
arm_cache_flush(env->regs[0], env->regs[1]);
} else if (n >= ARM_SYSCALL_BASE) {
/* linux syscall */
n -= ARM_SYSCALL_BASE;
env->regs[0] = do_syscall(env,
n,
env->regs[0],
env->regs[1],
env->regs[2],
env->regs[3],
env->regs[4],
0);
} else {
goto error;
}
}
break;
case EXCP_INTERRUPT:
/* just indicate that signals should be handled asap */
break;
default:
error:
fprintf(stderr, "qemu: unhandled CPU exception 0x%x - aborting\n",
trapnr);
cpu_arm_dump_state(env, stderr, 0);
abort();
}
process_pending_signals(env);
}
}
#endif
#ifdef TARGET_SPARC
//#define DEBUG_WIN
/* WARNING: dealing with register windows _is_ complicated */
static inline int get_reg_index(CPUSPARCState *env, int cwp, int index)
{
index = (index + cwp * 16) & (16 * NWINDOWS - 1);
/* wrap handling : if cwp is on the last window, then we use the
registers 'after' the end */
if (index < 8 && env->cwp == (NWINDOWS - 1))
index += (16 * NWINDOWS);
return index;
}
static inline void save_window_offset(CPUSPARCState *env, int offset)
{
unsigned int new_wim, i, cwp1;
uint32_t *sp_ptr;
new_wim = ((env->wim >> 1) | (env->wim << (NWINDOWS - 1))) &
((1LL << NWINDOWS) - 1);
/* save the window */
cwp1 = (env->cwp + offset) & (NWINDOWS - 1);
sp_ptr = (uint32_t *)(env->regbase[get_reg_index(env, cwp1, 6)]);
#if defined(DEBUG_WIN)
printf("win_overflow: sp_ptr=0x%x save_cwp=%d\n",
(int)sp_ptr, cwp1);
#endif
for(i = 0; i < 16; i++)
stl_raw(sp_ptr + i, env->regbase[get_reg_index(env, cwp1, 8 + i)]);
env->wim = new_wim;
}
static void save_window(CPUSPARCState *env)
{
save_window_offset(env, 2);
}
static void restore_window(CPUSPARCState *env)
{
unsigned int new_wim, i, cwp1;
uint32_t *sp_ptr;
new_wim = ((env->wim << 1) | (env->wim >> (NWINDOWS - 1))) &
((1LL << NWINDOWS) - 1);
/* restore the invalid window */
cwp1 = (env->cwp + 1) & (NWINDOWS - 1);
sp_ptr = (uint32_t *)(env->regbase[get_reg_index(env, cwp1, 6)]);
#if defined(DEBUG_WIN)
printf("win_underflow: sp_ptr=0x%x load_cwp=%d\n",
(int)sp_ptr, cwp1);
#endif
for(i = 0; i < 16; i++)
env->regbase[get_reg_index(env, cwp1, 8 + i)] = ldl_raw(sp_ptr + i);
env->wim = new_wim;
}
static void flush_windows(CPUSPARCState *env)
{
int offset, cwp1;
#if defined(DEBUG_WIN)
printf("flush_windows:\n");
#endif
offset = 2;
for(;;) {
/* if restore would invoke restore_window(), then we can stop */
cwp1 = (env->cwp + 1) & (NWINDOWS - 1);
if (env->wim & (1 << cwp1))
break;
#if defined(DEBUG_WIN)
printf("offset=%d: ", offset);
#endif
save_window_offset(env, offset);
offset++;
}
}
void cpu_loop (CPUSPARCState *env)
{
int trapnr, ret;
while (1) {
trapnr = cpu_sparc_exec (env);
switch (trapnr) {
case 0x88:
case 0x90:
ret = do_syscall (env, env->gregs[1],
env->regwptr[0], env->regwptr[1],
env->regwptr[2], env->regwptr[3],
env->regwptr[4], env->regwptr[5]);
if ((unsigned int)ret >= (unsigned int)(-515)) {
env->psr |= PSR_CARRY;
ret = -ret;
} else {
env->psr &= ~PSR_CARRY;
}
env->regwptr[0] = ret;
/* next instruction */
env->pc = env->npc;
env->npc = env->npc + 4;
break;
case 0x83: /* flush windows */
// flush_windows(env);
/* next instruction */
env->pc = env->npc;
env->npc = env->npc + 4;
break;
case TT_WIN_OVF: /* window overflow */
save_window(env);
break;
case TT_WIN_UNF: /* window underflow */
restore_window(env);
break;
default:
printf ("Unhandled trap: 0x%x\n", trapnr);
cpu_sparc_dump_state(env, stderr, 0);
exit (1);
}
process_pending_signals (env);
}
}
#endif
#ifdef TARGET_PPC
static inline uint64_t cpu_ppc_get_tb (CPUState *env)
{
/* TO FIX */
return 0;
}
uint32_t cpu_ppc_load_tbl (CPUState *env)
{
return cpu_ppc_get_tb(env) & 0xFFFFFFFF;
}
uint32_t cpu_ppc_load_tbu (CPUState *env)
{
return cpu_ppc_get_tb(env) >> 32;
}
static void cpu_ppc_store_tb (CPUState *env, uint64_t value)
{
/* TO FIX */
}
void cpu_ppc_store_tbu (CPUState *env, uint32_t value)
{
cpu_ppc_store_tb(env, ((uint64_t)value << 32) | cpu_ppc_load_tbl(env));
}
void cpu_ppc_store_tbl (CPUState *env, uint32_t value)
{
cpu_ppc_store_tb(env, ((uint64_t)cpu_ppc_load_tbl(env) << 32) | value);
}
uint32_t cpu_ppc_load_decr (CPUState *env)
{
/* TO FIX */
return -1;
}
void cpu_ppc_store_decr (CPUState *env, uint32_t value)
{
/* TO FIX */
}
void cpu_loop(CPUPPCState *env)
{
target_siginfo_t info;
int trapnr;
uint32_t ret;
for(;;) {
trapnr = cpu_ppc_exec(env);
if (trapnr != EXCP_SYSCALL_USER && trapnr != EXCP_BRANCH &&
trapnr != EXCP_TRACE) {
if (loglevel > 0) {
cpu_ppc_dump_state(env, logfile, 0);
}
}
switch(trapnr) {
case EXCP_NONE:
break;
case EXCP_SYSCALL_USER:
/* system call */
/* WARNING:
* PPC ABI uses overflow flag in cr0 to signal an error
* in syscalls.
*/
#if 0
printf("syscall %d 0x%08x 0x%08x 0x%08x 0x%08x\n", env->gpr[0],
env->gpr[3], env->gpr[4], env->gpr[5], env->gpr[6]);
#endif
env->crf[0] &= ~0x1;
ret = do_syscall(env, env->gpr[0], env->gpr[3], env->gpr[4],
env->gpr[5], env->gpr[6], env->gpr[7],
env->gpr[8]);
if (ret > (uint32_t)(-515)) {
env->crf[0] |= 0x1;
ret = -ret;
}
env->gpr[3] = ret;
#if 0
printf("syscall returned 0x%08x (%d)\n", ret, ret);
#endif
break;
case EXCP_RESET:
/* Should not happen ! */
fprintf(stderr, "RESET asked... Stop emulation\n");
if (loglevel)
fprintf(logfile, "RESET asked... Stop emulation\n");
abort();
case EXCP_MACHINE_CHECK:
fprintf(stderr, "Machine check exeption... Stop emulation\n");
if (loglevel)
fprintf(logfile, "RESET asked... Stop emulation\n");
info.si_signo = TARGET_SIGBUS;
info.si_errno = 0;
info.si_code = TARGET_BUS_OBJERR;
info._sifields._sigfault._addr = env->nip - 4;
queue_signal(info.si_signo, &info);
case EXCP_DSI:
fprintf(stderr, "Invalid data memory access: 0x%08x\n", env->spr[DAR]);
if (loglevel) {
fprintf(logfile, "Invalid data memory access: 0x%08x\n",
env->spr[DAR]);
}
switch (env->error_code & 0xF) {
case EXCP_DSI_TRANSLATE:
info.si_signo = TARGET_SIGSEGV;
info.si_errno = 0;
info.si_code = TARGET_SEGV_MAPERR;
break;
case EXCP_DSI_NOTSUP:
case EXCP_DSI_EXTERNAL:
info.si_signo = TARGET_SIGILL;
info.si_errno = 0;
info.si_code = TARGET_ILL_ILLADR;
break;
case EXCP_DSI_PROT:
info.si_signo = TARGET_SIGSEGV;
info.si_errno = 0;
info.si_code = TARGET_SEGV_ACCERR;
break;
case EXCP_DSI_DABR:
info.si_signo = TARGET_SIGTRAP;
info.si_errno = 0;
info.si_code = TARGET_TRAP_BRKPT;
break;
default:
/* Let's send a regular segfault... */
fprintf(stderr, "Invalid segfault errno (%02x)\n",
env->error_code);
if (loglevel) {
fprintf(logfile, "Invalid segfault errno (%02x)\n",
env->error_code);
}
info.si_signo = TARGET_SIGSEGV;
info.si_errno = 0;
info.si_code = TARGET_SEGV_MAPERR;
break;
}
info._sifields._sigfault._addr = env->nip;
queue_signal(info.si_signo, &info);
break;
case EXCP_ISI:
fprintf(stderr, "Invalid instruction fetch\n");
if (loglevel)
fprintf(logfile, "Invalid instruction fetch\n");
switch (env->error_code) {
case EXCP_ISI_TRANSLATE:
info.si_signo = TARGET_SIGSEGV;
info.si_errno = 0;
info.si_code = TARGET_SEGV_MAPERR;
break;
case EXCP_ISI_GUARD:
info.si_signo = TARGET_SIGILL;
info.si_errno = 0;
info.si_code = TARGET_ILL_ILLADR;
break;
case EXCP_ISI_NOEXEC:
case EXCP_ISI_PROT:
info.si_signo = TARGET_SIGSEGV;
info.si_errno = 0;
info.si_code = TARGET_SEGV_ACCERR;
break;
default:
/* Let's send a regular segfault... */
fprintf(stderr, "Invalid segfault errno (%02x)\n",
env->error_code);
if (loglevel) {
fprintf(logfile, "Invalid segfault errno (%02x)\n",
env->error_code);
}
info.si_signo = TARGET_SIGSEGV;
info.si_errno = 0;
info.si_code = TARGET_SEGV_MAPERR;
break;
}
info._sifields._sigfault._addr = env->nip - 4;
queue_signal(info.si_signo, &info);
break;
case EXCP_EXTERNAL:
/* Should not happen ! */
fprintf(stderr, "External interruption... Stop emulation\n");
if (loglevel)
fprintf(logfile, "External interruption... Stop emulation\n");
abort();
case EXCP_ALIGN:
fprintf(stderr, "Invalid unaligned memory access\n");
if (loglevel)
fprintf(logfile, "Invalid unaligned memory access\n");
info.si_signo = TARGET_SIGBUS;
info.si_errno = 0;
info.si_code = TARGET_BUS_ADRALN;
info._sifields._sigfault._addr = env->nip - 4;
queue_signal(info.si_signo, &info);
break;
case EXCP_PROGRAM:
switch (env->error_code & ~0xF) {
case EXCP_FP:
fprintf(stderr, "Program exception\n");
if (loglevel)
fprintf(logfile, "Program exception\n");
/* Set FX */
env->fpscr[7] |= 0x8;
/* Finally, update FEX */
if ((((env->fpscr[7] & 0x3) << 3) | (env->fpscr[6] >> 1)) &
((env->fpscr[1] << 1) | (env->fpscr[0] >> 3)))
env->fpscr[7] |= 0x4;
info.si_signo = TARGET_SIGFPE;
info.si_errno = 0;
switch (env->error_code & 0xF) {
case EXCP_FP_OX:
info.si_code = TARGET_FPE_FLTOVF;
break;
case EXCP_FP_UX:
info.si_code = TARGET_FPE_FLTUND;
break;
case EXCP_FP_ZX:
case EXCP_FP_VXZDZ:
info.si_code = TARGET_FPE_FLTDIV;
break;
case EXCP_FP_XX:
info.si_code = TARGET_FPE_FLTRES;
break;
case EXCP_FP_VXSOFT:
info.si_code = TARGET_FPE_FLTINV;
break;
case EXCP_FP_VXNAN:
case EXCP_FP_VXISI:
case EXCP_FP_VXIDI:
case EXCP_FP_VXIMZ:
case EXCP_FP_VXVC:
case EXCP_FP_VXSQRT:
case EXCP_FP_VXCVI:
info.si_code = TARGET_FPE_FLTSUB;
break;
default:
fprintf(stderr, "Unknown floating point exception "
"(%02x)\n", env->error_code);
if (loglevel) {
fprintf(logfile, "Unknown floating point exception "
"(%02x)\n", env->error_code & 0xF);
}
}
break;
case EXCP_INVAL:
fprintf(stderr, "Invalid instruction\n");
if (loglevel)
fprintf(logfile, "Invalid instruction\n");
info.si_signo = TARGET_SIGILL;
info.si_errno = 0;
switch (env->error_code & 0xF) {
case EXCP_INVAL_INVAL:
info.si_code = TARGET_ILL_ILLOPC;
break;
case EXCP_INVAL_LSWX:
info.si_code = TARGET_ILL_ILLOPN;
break;
case EXCP_INVAL_SPR:
info.si_code = TARGET_ILL_PRVREG;
break;
case EXCP_INVAL_FP:
info.si_code = TARGET_ILL_COPROC;
break;
default:
fprintf(stderr, "Unknown invalid operation (%02x)\n",
env->error_code & 0xF);
if (loglevel) {
fprintf(logfile, "Unknown invalid operation (%02x)\n",
env->error_code & 0xF);
}
info.si_code = TARGET_ILL_ILLADR;
break;
}
break;
case EXCP_PRIV:
fprintf(stderr, "Privilege violation\n");
if (loglevel)
fprintf(logfile, "Privilege violation\n");
info.si_signo = TARGET_SIGILL;
info.si_errno = 0;
switch (env->error_code & 0xF) {
case EXCP_PRIV_OPC:
info.si_code = TARGET_ILL_PRVOPC;
break;
case EXCP_PRIV_REG:
info.si_code = TARGET_ILL_PRVREG;
break;
default:
fprintf(stderr, "Unknown privilege violation (%02x)\n",
env->error_code & 0xF);
info.si_code = TARGET_ILL_PRVOPC;
break;
}
break;
case EXCP_TRAP:
fprintf(stderr, "Tried to call a TRAP\n");
if (loglevel)
fprintf(logfile, "Tried to call a TRAP\n");
abort();
default:
/* Should not happen ! */
fprintf(stderr, "Unknown program exception (%02x)\n",
env->error_code);
if (loglevel) {
fprintf(logfile, "Unknwon program exception (%02x)\n",
env->error_code);
}
abort();
}
info._sifields._sigfault._addr = env->nip - 4;
queue_signal(info.si_signo, &info);
break;
case EXCP_NO_FP:
fprintf(stderr, "No floating point allowed\n");
if (loglevel)
fprintf(logfile, "No floating point allowed\n");
info.si_signo = TARGET_SIGILL;
info.si_errno = 0;
info.si_code = TARGET_ILL_COPROC;
info._sifields._sigfault._addr = env->nip - 4;
queue_signal(info.si_signo, &info);
break;
case EXCP_DECR:
/* Should not happen ! */
fprintf(stderr, "Decrementer exception\n");
if (loglevel)
fprintf(logfile, "Decrementer exception\n");
abort();
case EXCP_RESA: /* Implementation specific */
/* Should not happen ! */
fprintf(stderr, "RESA exception should never happen !\n");
if (loglevel)
fprintf(logfile, "RESA exception should never happen !\n");
abort();
case EXCP_RESB: /* Implementation specific */
/* Should not happen ! */
fprintf(stderr, "RESB exception should never happen !\n");
if (loglevel)
fprintf(logfile, "RESB exception should never happen !\n");
abort();
case EXCP_TRACE:
/* Do nothing: we use this to trace execution */
break;
case EXCP_FP_ASSIST:
/* Should not happen ! */
fprintf(stderr, "Floating point assist exception\n");
if (loglevel)
fprintf(logfile, "Floating point assist exception\n");
abort();
case EXCP_MTMSR:
/* We reloaded the msr, just go on */
if (msr_pr == 0) {
fprintf(stderr, "Tried to go into supervisor mode !\n");
if (loglevel)
fprintf(logfile, "Tried to go into supervisor mode !\n");
abort();
}
break;
case EXCP_BRANCH:
/* We stopped because of a jump... */
break;
case EXCP_RFI:
/* Should not occur: we always are in user mode */
fprintf(stderr, "Return from interrupt ?\n");
if (loglevel)
fprintf(logfile, "Return from interrupt ?\n");
abort();
case EXCP_INTERRUPT:
/* Don't know why this should ever happen... */
break;
case EXCP_DEBUG:
break;
default:
fprintf(stderr, "qemu: unhandled CPU exception 0x%x - aborting\n",
trapnr);
if (loglevel) {
fprintf(logfile, "qemu: unhandled CPU exception 0x%02x - "
"0x%02x - aborting\n", trapnr, env->error_code);
}
abort();
}
process_pending_signals(env);
}
}
#endif
void usage(void)
{
printf("qemu-" TARGET_ARCH " version " QEMU_VERSION ", Copyright (c) 2003-2004 Fabrice Bellard\n"
"usage: qemu-" TARGET_ARCH " [-h] [-d opts] [-L path] [-s size] program [arguments...]\n"
"Linux CPU emulator (compiled for %s emulation)\n"
"\n"
"-h print this help\n"
"-L path set the elf interpreter prefix (default=%s)\n"
"-s size set the stack size in bytes (default=%ld)\n"
"\n"
"debug options:\n"
#ifdef USE_CODE_COPY
"-no-code-copy disable code copy acceleration\n"
#endif
"-d options activate log (logfile=%s)\n"
"-p pagesize set the host page size to 'pagesize'\n",
TARGET_ARCH,
interp_prefix,
x86_stack_size,
DEBUG_LOGFILE);
_exit(1);
}
/* XXX: currently only used for async signals (see signal.c) */
CPUState *global_env;
/* used only if single thread */
CPUState *cpu_single_env = NULL;
/* used to free thread contexts */
TaskState *first_task_state;
int main(int argc, char **argv)
{
const char *filename;
struct target_pt_regs regs1, *regs = &regs1;
struct image_info info1, *info = &info1;
TaskState ts1, *ts = &ts1;
CPUState *env;
int optind;
const char *r;
if (argc <= 1)
usage();
/* init debug */
cpu_set_log_filename(DEBUG_LOGFILE);
optind = 1;
for(;;) {
if (optind >= argc)
break;
r = argv[optind];
if (r[0] != '-')
break;
optind++;
r++;
if (!strcmp(r, "-")) {
break;
} else if (!strcmp(r, "d")) {
int mask;
CPULogItem *item;
if (optind >= argc)
break;
r = argv[optind++];
mask = cpu_str_to_log_mask(r);
if (!mask) {
printf("Log items (comma separated):\n");
for(item = cpu_log_items; item->mask != 0; item++) {
printf("%-10s %s\n", item->name, item->help);
}
exit(1);
}
cpu_set_log(mask);
} else if (!strcmp(r, "s")) {
r = argv[optind++];
x86_stack_size = strtol(r, (char **)&r, 0);
if (x86_stack_size <= 0)
usage();
if (*r == 'M')
x86_stack_size *= 1024 * 1024;
else if (*r == 'k' || *r == 'K')
x86_stack_size *= 1024;
} else if (!strcmp(r, "L")) {
interp_prefix = argv[optind++];
} else if (!strcmp(r, "p")) {
host_page_size = atoi(argv[optind++]);
if (host_page_size == 0 ||
(host_page_size & (host_page_size - 1)) != 0) {
fprintf(stderr, "page size must be a power of two\n");
exit(1);
}
} else
#ifdef USE_CODE_COPY
if (!strcmp(r, "no-code-copy")) {
code_copy_enabled = 0;
} else
#endif
{
usage();
}
}
if (optind >= argc)
usage();
filename = argv[optind];
/* Zero out regs */
memset(regs, 0, sizeof(struct target_pt_regs));
/* Zero out image_info */
memset(info, 0, sizeof(struct image_info));
/* Scan interp_prefix dir for replacement files. */
init_paths(interp_prefix);
/* NOTE: we need to init the CPU at this stage to get the
host_page_size */
env = cpu_init();
if (elf_exec(filename, argv+optind, environ, regs, info) != 0) {
printf("Error loading %s\n", filename);
_exit(1);
}
if (loglevel) {
page_dump(logfile);
fprintf(logfile, "start_brk 0x%08lx\n" , info->start_brk);
fprintf(logfile, "end_code 0x%08lx\n" , info->end_code);
fprintf(logfile, "start_code 0x%08lx\n" , info->start_code);
fprintf(logfile, "end_data 0x%08lx\n" , info->end_data);
fprintf(logfile, "start_stack 0x%08lx\n" , info->start_stack);
fprintf(logfile, "brk 0x%08lx\n" , info->brk);
fprintf(logfile, "entry 0x%08lx\n" , info->entry);
}
target_set_brk((char *)info->brk);
syscall_init();
signal_init();
global_env = env;
/* build Task State */
memset(ts, 0, sizeof(TaskState));
env->opaque = ts;
ts->used = 1;
env->user_mode_only = 1;
#if defined(TARGET_I386)
cpu_x86_set_cpl(env, 3);
env->cr[0] = CR0_PG_MASK | CR0_WP_MASK | CR0_PE_MASK;
env->hflags |= HF_PE_MASK;
/* flags setup : we activate the IRQs by default as in user mode */
env->eflags |= IF_MASK;
/* linux register setup */
env->regs[R_EAX] = regs->eax;
env->regs[R_EBX] = regs->ebx;
env->regs[R_ECX] = regs->ecx;
env->regs[R_EDX] = regs->edx;
env->regs[R_ESI] = regs->esi;
env->regs[R_EDI] = regs->edi;
env->regs[R_EBP] = regs->ebp;
env->regs[R_ESP] = regs->esp;
env->eip = regs->eip;
/* linux interrupt setup */
env->idt.base = (void *)idt_table;
env->idt.limit = sizeof(idt_table) - 1;
set_idt(0, 0);
set_idt(1, 0);
set_idt(2, 0);
set_idt(3, 3);
set_idt(4, 3);
set_idt(5, 3);
set_idt(6, 0);
set_idt(7, 0);
set_idt(8, 0);
set_idt(9, 0);
set_idt(10, 0);
set_idt(11, 0);
set_idt(12, 0);
set_idt(13, 0);
set_idt(14, 0);
set_idt(15, 0);
set_idt(16, 0);
set_idt(17, 0);
set_idt(18, 0);
set_idt(19, 0);
set_idt(0x80, 3);
/* linux segment setup */
env->gdt.base = (void *)gdt_table;
env->gdt.limit = sizeof(gdt_table) - 1;
write_dt(&gdt_table[__USER_CS >> 3], 0, 0xfffff,
DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
(3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT));
write_dt(&gdt_table[__USER_DS >> 3], 0, 0xfffff,
DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
(3 << DESC_DPL_SHIFT) | (0x2 << DESC_TYPE_SHIFT));
cpu_x86_load_seg(env, R_CS, __USER_CS);
cpu_x86_load_seg(env, R_DS, __USER_DS);
cpu_x86_load_seg(env, R_ES, __USER_DS);
cpu_x86_load_seg(env, R_SS, __USER_DS);
cpu_x86_load_seg(env, R_FS, __USER_DS);
cpu_x86_load_seg(env, R_GS, __USER_DS);
#elif defined(TARGET_ARM)
{
int i;
for(i = 0; i < 16; i++) {
env->regs[i] = regs->uregs[i];
}
env->cpsr = regs->uregs[16];
}
#elif defined(TARGET_SPARC)
{
int i;
env->pc = regs->pc;
env->npc = regs->npc;
env->y = regs->y;
for(i = 0; i < 8; i++)
env->gregs[i] = regs->u_regs[i];
for(i = 0; i < 8; i++)
env->regwptr[i] = regs->u_regs[i + 8];
}
#elif defined(TARGET_PPC)
{
int i;
for (i = 0; i < 32; i++) {
if (i != 12 && i != 6)
env->msr[i] = (regs->msr >> i) & 1;
}
env->nip = regs->nip;
for(i = 0; i < 32; i++) {
env->gpr[i] = regs->gpr[i];
}
}
#else
#error unsupported target CPU
#endif
cpu_loop(env);
/* never exits */
return 0;
}
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