root / darwin-user / main.c @ 5f650495
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/*
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* qemu user main
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*
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* Copyright (c) 2003 Fabrice Bellard
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* Copyright (c) 2006 Pierre d'Herbemont
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*/
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#include <stdlib.h> |
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#include <stdio.h> |
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#include <stdarg.h> |
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#include <string.h> |
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#include <errno.h> |
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#include <unistd.h> |
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#include <sys/syscall.h> |
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#include <sys/mman.h> |
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#include "qemu.h" |
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#define DEBUG_LOGFILE "/tmp/qemu.log" |
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#ifdef __APPLE__
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#include <crt_externs.h> |
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# define environ (*_NSGetEnviron())
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#endif
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#include <mach/mach_init.h> |
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#include <mach/vm_map.h> |
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int singlestep;
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const char *interp_prefix = ""; |
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asm(".zerofill __STD_PROG_ZONE, __STD_PROG_ZONE, __std_prog_zone, 0x0dfff000"); |
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/* XXX: on x86 MAP_GROWSDOWN only works if ESP <= address + 32, so
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we allocate a bigger stack. Need a better solution, for example
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by remapping the process stack directly at the right place */
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unsigned long stack_size = 512 * 1024; |
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void qerror(const char *fmt, ...) |
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{
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va_list ap; |
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va_start(ap, fmt); |
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vfprintf(stderr, fmt, ap); |
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va_end(ap); |
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fprintf(stderr, "\n");
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exit(1);
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} |
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void gemu_log(const char *fmt, ...) |
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{
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va_list ap; |
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va_start(ap, fmt); |
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vfprintf(stderr, fmt, ap); |
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va_end(ap); |
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} |
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int cpu_get_pic_interrupt(CPUState *env)
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{
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return -1; |
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} |
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#ifdef TARGET_PPC
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static inline uint64_t cpu_ppc_get_tb (CPUState *env) |
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{
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/* TO FIX */
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return 0; |
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} |
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uint32_t cpu_ppc_load_tbl (CPUState *env) |
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{
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return cpu_ppc_get_tb(env) & 0xFFFFFFFF; |
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} |
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uint32_t cpu_ppc_load_tbu (CPUState *env) |
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{
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return cpu_ppc_get_tb(env) >> 32; |
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} |
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uint32_t cpu_ppc_load_atbl (CPUState *env) |
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{
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return cpu_ppc_get_tb(env) & 0xFFFFFFFF; |
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} |
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uint32_t cpu_ppc_load_atbu (CPUState *env) |
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{
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return cpu_ppc_get_tb(env) >> 32; |
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} |
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uint32_t cpu_ppc601_load_rtcu (CPUState *env) |
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{
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cpu_ppc_load_tbu(env); |
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} |
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uint32_t cpu_ppc601_load_rtcl (CPUState *env) |
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{
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return cpu_ppc_load_tbl(env) & 0x3FFFFF80; |
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} |
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/* XXX: to be fixed */
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int ppc_dcr_read (ppc_dcr_t *dcr_env, int dcrn, target_ulong *valp) |
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{
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return -1; |
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} |
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int ppc_dcr_write (ppc_dcr_t *dcr_env, int dcrn, target_ulong val) |
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{
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return -1; |
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} |
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#define EXCP_DUMP(env, fmt, ...) \
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do { \
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fprintf(stderr, fmt , ## __VA_ARGS__); \ |
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cpu_dump_state(env, stderr, fprintf, 0); \
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qemu_log(fmt, ## __VA_ARGS__); \ |
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log_cpu_state(env, 0); \
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} while (0) |
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void cpu_loop(CPUPPCState *env)
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{
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int trapnr;
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uint32_t ret; |
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target_siginfo_t info; |
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for(;;) {
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trapnr = cpu_ppc_exec(env); |
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switch(trapnr) {
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case POWERPC_EXCP_NONE:
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/* Just go on */
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break;
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case POWERPC_EXCP_CRITICAL: /* Critical input */ |
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cpu_abort(env, "Critical interrupt while in user mode. "
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"Aborting\n");
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break;
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case POWERPC_EXCP_MCHECK: /* Machine check exception */ |
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cpu_abort(env, "Machine check exception while in user mode. "
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"Aborting\n");
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break;
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case POWERPC_EXCP_DSI: /* Data storage exception */ |
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#ifndef DAR
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/* To deal with multiple qemu header version as host for the darwin-user code */
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# define DAR SPR_DAR
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#endif
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EXCP_DUMP(env, "Invalid data memory access: 0x" ADDRX "\n", |
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env->spr[SPR_DAR]); |
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/* Handle this via the gdb */
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gdb_handlesig (env, SIGSEGV); |
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info.si_addr = (void*)env->nip;
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queue_signal(info.si_signo, &info); |
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break;
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case POWERPC_EXCP_ISI: /* Instruction storage exception */ |
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EXCP_DUMP(env, "Invalid instruction fetch: 0x\n" ADDRX "\n", |
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env->spr[SPR_DAR]); |
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/* Handle this via the gdb */
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gdb_handlesig (env, SIGSEGV); |
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info.si_addr = (void*)(env->nip - 4); |
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queue_signal(info.si_signo, &info); |
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break;
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case POWERPC_EXCP_EXTERNAL: /* External input */ |
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cpu_abort(env, "External interrupt while in user mode. "
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"Aborting\n");
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break;
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case POWERPC_EXCP_ALIGN: /* Alignment exception */ |
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EXCP_DUMP(env, "Unaligned memory access\n");
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info.si_errno = 0;
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info.si_code = BUS_ADRALN; |
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info.si_addr = (void*)(env->nip - 4); |
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queue_signal(info.si_signo, &info); |
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break;
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case POWERPC_EXCP_PROGRAM: /* Program exception */ |
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/* XXX: check this */
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switch (env->error_code & ~0xF) { |
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case POWERPC_EXCP_FP:
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EXCP_DUMP(env, "Floating point program exception\n");
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/* Set FX */
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info.si_signo = SIGFPE; |
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info.si_errno = 0;
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switch (env->error_code & 0xF) { |
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case POWERPC_EXCP_FP_OX:
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info.si_code = FPE_FLTOVF; |
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break;
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case POWERPC_EXCP_FP_UX:
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info.si_code = FPE_FLTUND; |
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break;
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case POWERPC_EXCP_FP_ZX:
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case POWERPC_EXCP_FP_VXZDZ:
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info.si_code = FPE_FLTDIV; |
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break;
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case POWERPC_EXCP_FP_XX:
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info.si_code = FPE_FLTRES; |
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break;
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case POWERPC_EXCP_FP_VXSOFT:
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info.si_code = FPE_FLTINV; |
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break;
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case POWERPC_EXCP_FP_VXSNAN:
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case POWERPC_EXCP_FP_VXISI:
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case POWERPC_EXCP_FP_VXIDI:
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case POWERPC_EXCP_FP_VXIMZ:
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case POWERPC_EXCP_FP_VXVC:
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case POWERPC_EXCP_FP_VXSQRT:
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case POWERPC_EXCP_FP_VXCVI:
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info.si_code = FPE_FLTSUB; |
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break;
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default:
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EXCP_DUMP(env, "Unknown floating point exception (%02x)\n",
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env->error_code); |
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break;
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} |
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break;
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case POWERPC_EXCP_INVAL:
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EXCP_DUMP(env, "Invalid instruction\n");
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info.si_signo = SIGILL; |
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info.si_errno = 0;
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switch (env->error_code & 0xF) { |
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case POWERPC_EXCP_INVAL_INVAL:
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info.si_code = ILL_ILLOPC; |
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break;
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case POWERPC_EXCP_INVAL_LSWX:
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info.si_code = ILL_ILLOPN; |
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break;
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case POWERPC_EXCP_INVAL_SPR:
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info.si_code = ILL_PRVREG; |
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break;
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case POWERPC_EXCP_INVAL_FP:
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info.si_code = ILL_COPROC; |
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break;
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default:
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EXCP_DUMP(env, "Unknown invalid operation (%02x)\n",
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env->error_code & 0xF);
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info.si_code = ILL_ILLADR; |
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break;
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} |
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/* Handle this via the gdb */
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gdb_handlesig (env, SIGSEGV); |
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break;
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case POWERPC_EXCP_PRIV:
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EXCP_DUMP(env, "Privilege violation\n");
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info.si_signo = SIGILL; |
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info.si_errno = 0;
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switch (env->error_code & 0xF) { |
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case POWERPC_EXCP_PRIV_OPC:
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info.si_code = ILL_PRVOPC; |
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break;
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case POWERPC_EXCP_PRIV_REG:
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info.si_code = ILL_PRVREG; |
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break;
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default:
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EXCP_DUMP(env, "Unknown privilege violation (%02x)\n",
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env->error_code & 0xF);
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info.si_code = ILL_PRVOPC; |
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break;
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} |
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break;
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case POWERPC_EXCP_TRAP:
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cpu_abort(env, "Tried to call a TRAP\n");
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break;
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default:
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/* Should not happen ! */
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cpu_abort(env, "Unknown program exception (%02x)\n",
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env->error_code); |
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break;
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} |
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info.si_addr = (void*)(env->nip - 4); |
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queue_signal(info.si_signo, &info); |
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break;
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case POWERPC_EXCP_FPU: /* Floating-point unavailable exception */ |
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EXCP_DUMP(env, "No floating point allowed\n");
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info.si_signo = SIGILL; |
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info.si_errno = 0;
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info.si_code = ILL_COPROC; |
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info.si_addr = (void*)(env->nip - 4); |
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queue_signal(info.si_signo, &info); |
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break;
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case POWERPC_EXCP_SYSCALL: /* System call exception */ |
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cpu_abort(env, "Syscall exception while in user mode. "
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"Aborting\n");
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break;
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case POWERPC_EXCP_APU: /* Auxiliary processor unavailable */ |
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EXCP_DUMP(env, "No APU instruction allowed\n");
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info.si_signo = SIGILL; |
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info.si_errno = 0;
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info.si_code = ILL_COPROC; |
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info.si_addr = (void*)(env->nip - 4); |
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queue_signal(info.si_signo, &info); |
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break;
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case POWERPC_EXCP_DECR: /* Decrementer exception */ |
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cpu_abort(env, "Decrementer interrupt while in user mode. "
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"Aborting\n");
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break;
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case POWERPC_EXCP_FIT: /* Fixed-interval timer interrupt */ |
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cpu_abort(env, "Fix interval timer interrupt while in user mode. "
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"Aborting\n");
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break;
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case POWERPC_EXCP_WDT: /* Watchdog timer interrupt */ |
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cpu_abort(env, "Watchdog timer interrupt while in user mode. "
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"Aborting\n");
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break;
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case POWERPC_EXCP_DTLB: /* Data TLB error */ |
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cpu_abort(env, "Data TLB exception while in user mode. "
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"Aborting\n");
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break;
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case POWERPC_EXCP_ITLB: /* Instruction TLB error */ |
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cpu_abort(env, "Instruction TLB exception while in user mode. "
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"Aborting\n");
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break;
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case POWERPC_EXCP_DEBUG: /* Debug interrupt */ |
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gdb_handlesig (env, SIGTRAP); |
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break;
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case POWERPC_EXCP_SPEU: /* SPE/embedded floating-point unavail. */ |
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EXCP_DUMP(env, "No SPE/floating-point instruction allowed\n");
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info.si_signo = SIGILL; |
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info.si_errno = 0;
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info.si_code = ILL_COPROC; |
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info.si_addr = (void*)(env->nip - 4); |
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queue_signal(info.si_signo, &info); |
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break;
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case POWERPC_EXCP_EFPDI: /* Embedded floating-point data IRQ */ |
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cpu_abort(env, "Embedded floating-point data IRQ not handled\n");
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break;
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case POWERPC_EXCP_EFPRI: /* Embedded floating-point round IRQ */ |
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cpu_abort(env, "Embedded floating-point round IRQ not handled\n");
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break;
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case POWERPC_EXCP_EPERFM: /* Embedded performance monitor IRQ */ |
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cpu_abort(env, "Performance monitor exception not handled\n");
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break;
|
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case POWERPC_EXCP_DOORI: /* Embedded doorbell interrupt */ |
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cpu_abort(env, "Doorbell interrupt while in user mode. "
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"Aborting\n");
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break;
|
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case POWERPC_EXCP_DOORCI: /* Embedded doorbell critical interrupt */ |
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cpu_abort(env, "Doorbell critical interrupt while in user mode. "
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"Aborting\n");
|
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break;
|
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case POWERPC_EXCP_RESET: /* System reset exception */ |
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cpu_abort(env, "Reset interrupt while in user mode. "
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"Aborting\n");
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break;
|
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case POWERPC_EXCP_DSEG: /* Data segment exception */ |
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cpu_abort(env, "Data segment exception while in user mode. "
|
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"Aborting\n");
|
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break;
|
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case POWERPC_EXCP_ISEG: /* Instruction segment exception */ |
| 362 |
cpu_abort(env, "Instruction segment exception "
|
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"while in user mode. Aborting\n");
|
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break;
|
| 365 |
case POWERPC_EXCP_HDECR: /* Hypervisor decrementer exception */ |
| 366 |
cpu_abort(env, "Hypervisor decrementer interrupt "
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"while in user mode. Aborting\n");
|
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break;
|
| 369 |
case POWERPC_EXCP_TRACE: /* Trace exception */ |
| 370 |
/* Nothing to do:
|
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* we use this exception to emulate step-by-step execution mode.
|
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*/
|
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break;
|
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case POWERPC_EXCP_HDSI: /* Hypervisor data storage exception */ |
| 375 |
cpu_abort(env, "Hypervisor data storage exception "
|
| 376 |
"while in user mode. Aborting\n");
|
| 377 |
break;
|
| 378 |
case POWERPC_EXCP_HISI: /* Hypervisor instruction storage excp */ |
| 379 |
cpu_abort(env, "Hypervisor instruction storage exception "
|
| 380 |
"while in user mode. Aborting\n");
|
| 381 |
break;
|
| 382 |
case POWERPC_EXCP_HDSEG: /* Hypervisor data segment exception */ |
| 383 |
cpu_abort(env, "Hypervisor data segment exception "
|
| 384 |
"while in user mode. Aborting\n");
|
| 385 |
break;
|
| 386 |
case POWERPC_EXCP_HISEG: /* Hypervisor instruction segment excp */ |
| 387 |
cpu_abort(env, "Hypervisor instruction segment exception "
|
| 388 |
"while in user mode. Aborting\n");
|
| 389 |
break;
|
| 390 |
case POWERPC_EXCP_VPU: /* Vector unavailable exception */ |
| 391 |
EXCP_DUMP(env, "No Altivec instructions allowed\n");
|
| 392 |
info.si_signo = SIGILL; |
| 393 |
info.si_errno = 0;
|
| 394 |
info.si_code = ILL_COPROC; |
| 395 |
info.si_addr = (void*)(env->nip - 4); |
| 396 |
queue_signal(info.si_signo, &info); |
| 397 |
break;
|
| 398 |
case POWERPC_EXCP_PIT: /* Programmable interval timer IRQ */ |
| 399 |
cpu_abort(env, "Programable interval timer interrupt "
|
| 400 |
"while in user mode. Aborting\n");
|
| 401 |
break;
|
| 402 |
case POWERPC_EXCP_IO: /* IO error exception */ |
| 403 |
cpu_abort(env, "IO error exception while in user mode. "
|
| 404 |
"Aborting\n");
|
| 405 |
break;
|
| 406 |
case POWERPC_EXCP_RUNM: /* Run mode exception */ |
| 407 |
cpu_abort(env, "Run mode exception while in user mode. "
|
| 408 |
"Aborting\n");
|
| 409 |
break;
|
| 410 |
case POWERPC_EXCP_EMUL: /* Emulation trap exception */ |
| 411 |
cpu_abort(env, "Emulation trap exception not handled\n");
|
| 412 |
break;
|
| 413 |
case POWERPC_EXCP_IFTLB: /* Instruction fetch TLB error */ |
| 414 |
cpu_abort(env, "Instruction fetch TLB exception "
|
| 415 |
"while in user-mode. Aborting");
|
| 416 |
break;
|
| 417 |
case POWERPC_EXCP_DLTLB: /* Data load TLB miss */ |
| 418 |
cpu_abort(env, "Data load TLB exception while in user-mode. "
|
| 419 |
"Aborting");
|
| 420 |
break;
|
| 421 |
case POWERPC_EXCP_DSTLB: /* Data store TLB miss */ |
| 422 |
cpu_abort(env, "Data store TLB exception while in user-mode. "
|
| 423 |
"Aborting");
|
| 424 |
break;
|
| 425 |
case POWERPC_EXCP_FPA: /* Floating-point assist exception */ |
| 426 |
cpu_abort(env, "Floating-point assist exception not handled\n");
|
| 427 |
break;
|
| 428 |
case POWERPC_EXCP_IABR: /* Instruction address breakpoint */ |
| 429 |
cpu_abort(env, "Instruction address breakpoint exception "
|
| 430 |
"not handled\n");
|
| 431 |
break;
|
| 432 |
case POWERPC_EXCP_SMI: /* System management interrupt */ |
| 433 |
cpu_abort(env, "System management interrupt while in user mode. "
|
| 434 |
"Aborting\n");
|
| 435 |
break;
|
| 436 |
case POWERPC_EXCP_THERM: /* Thermal interrupt */ |
| 437 |
cpu_abort(env, "Thermal interrupt interrupt while in user mode. "
|
| 438 |
"Aborting\n");
|
| 439 |
break;
|
| 440 |
case POWERPC_EXCP_PERFM: /* Embedded performance monitor IRQ */ |
| 441 |
cpu_abort(env, "Performance monitor exception not handled\n");
|
| 442 |
break;
|
| 443 |
case POWERPC_EXCP_VPUA: /* Vector assist exception */ |
| 444 |
cpu_abort(env, "Vector assist exception not handled\n");
|
| 445 |
break;
|
| 446 |
case POWERPC_EXCP_SOFTP: /* Soft patch exception */ |
| 447 |
cpu_abort(env, "Soft patch exception not handled\n");
|
| 448 |
break;
|
| 449 |
case POWERPC_EXCP_MAINT: /* Maintenance exception */ |
| 450 |
cpu_abort(env, "Maintenance exception while in user mode. "
|
| 451 |
"Aborting\n");
|
| 452 |
break;
|
| 453 |
case POWERPC_EXCP_STOP: /* stop translation */ |
| 454 |
/* We did invalidate the instruction cache. Go on */
|
| 455 |
break;
|
| 456 |
case POWERPC_EXCP_BRANCH: /* branch instruction: */ |
| 457 |
/* We just stopped because of a branch. Go on */
|
| 458 |
break;
|
| 459 |
case POWERPC_EXCP_SYSCALL_USER:
|
| 460 |
/* system call in user-mode emulation */
|
| 461 |
/* system call */
|
| 462 |
if(((int)env->gpr[0]) <= SYS_MAXSYSCALL && ((int)env->gpr[0])>0) |
| 463 |
ret = do_unix_syscall(env, env->gpr[0]/*, env->gpr[3], env->gpr[4], |
| 464 |
env->gpr[5], env->gpr[6], env->gpr[7],
|
| 465 |
env->gpr[8], env->gpr[9], env->gpr[10]*/);
|
| 466 |
else if(((int)env->gpr[0])<0) |
| 467 |
ret = do_mach_syscall(env, env->gpr[0], env->gpr[3], env->gpr[4], |
| 468 |
env->gpr[5], env->gpr[6], env->gpr[7], |
| 469 |
env->gpr[8], env->gpr[9], env->gpr[10]); |
| 470 |
else
|
| 471 |
ret = do_thread_syscall(env, env->gpr[0], env->gpr[3], env->gpr[4], |
| 472 |
env->gpr[5], env->gpr[6], env->gpr[7], |
| 473 |
env->gpr[8], env->gpr[9], env->gpr[10]); |
| 474 |
|
| 475 |
/* Unix syscall error signaling */
|
| 476 |
if(((int)env->gpr[0]) <= SYS_MAXSYSCALL && ((int)env->gpr[0])>0) |
| 477 |
{
|
| 478 |
if( (int)ret < 0 ) |
| 479 |
env->nip += 0;
|
| 480 |
else
|
| 481 |
env->nip += 4;
|
| 482 |
} |
| 483 |
|
| 484 |
/* Return value */
|
| 485 |
env->gpr[3] = ret;
|
| 486 |
break;
|
| 487 |
case EXCP_INTERRUPT:
|
| 488 |
/* just indicate that signals should be handled asap */
|
| 489 |
break;
|
| 490 |
default:
|
| 491 |
cpu_abort(env, "Unknown exception 0x%d. Aborting\n", trapnr);
|
| 492 |
break;
|
| 493 |
} |
| 494 |
process_pending_signals(env); |
| 495 |
} |
| 496 |
} |
| 497 |
#endif
|
| 498 |
|
| 499 |
|
| 500 |
#ifdef TARGET_I386
|
| 501 |
|
| 502 |
/***********************************************************/
|
| 503 |
/* CPUX86 core interface */
|
| 504 |
|
| 505 |
uint64_t cpu_get_tsc(CPUX86State *env) |
| 506 |
{
|
| 507 |
return cpu_get_real_ticks();
|
| 508 |
} |
| 509 |
|
| 510 |
void
|
| 511 |
write_dt(void *ptr, unsigned long addr, unsigned long limit, |
| 512 |
int flags)
|
| 513 |
{
|
| 514 |
unsigned int e1, e2; |
| 515 |
e1 = (addr << 16) | (limit & 0xffff); |
| 516 |
e2 = ((addr >> 16) & 0xff) | (addr & 0xff000000) | (limit & 0x000f0000); |
| 517 |
e2 |= flags; |
| 518 |
stl((uint8_t *)ptr, e1); |
| 519 |
stl((uint8_t *)ptr + 4, e2);
|
| 520 |
} |
| 521 |
|
| 522 |
static void set_gate(void *ptr, unsigned int type, unsigned int dpl, |
| 523 |
unsigned long addr, unsigned int sel) |
| 524 |
{
|
| 525 |
unsigned int e1, e2; |
| 526 |
e1 = (addr & 0xffff) | (sel << 16); |
| 527 |
e2 = (addr & 0xffff0000) | 0x8000 | (dpl << 13) | (type << 8); |
| 528 |
stl((uint8_t *)ptr, e1); |
| 529 |
stl((uint8_t *)ptr + 4, e2);
|
| 530 |
} |
| 531 |
|
| 532 |
#define GDT_TABLE_SIZE 14 |
| 533 |
#define LDT_TABLE_SIZE 15 |
| 534 |
#define IDT_TABLE_SIZE 256 |
| 535 |
#define TSS_SIZE 104 |
| 536 |
uint64_t gdt_table[GDT_TABLE_SIZE]; |
| 537 |
uint64_t ldt_table[LDT_TABLE_SIZE]; |
| 538 |
uint64_t idt_table[IDT_TABLE_SIZE]; |
| 539 |
uint32_t tss[TSS_SIZE]; |
| 540 |
|
| 541 |
/* only dpl matters as we do only user space emulation */
|
| 542 |
static void set_idt(int n, unsigned int dpl) |
| 543 |
{
|
| 544 |
set_gate(idt_table + n, 0, dpl, 0, 0); |
| 545 |
} |
| 546 |
|
| 547 |
/* ABI convention: after a syscall if there was an error the CF flag is set */
|
| 548 |
static inline void set_error(CPUX86State *env, int ret) |
| 549 |
{
|
| 550 |
if(ret<0) |
| 551 |
env->eflags = env->eflags | 0x1;
|
| 552 |
else
|
| 553 |
env->eflags &= ~0x1;
|
| 554 |
env->regs[R_EAX] = ret; |
| 555 |
} |
| 556 |
|
| 557 |
void cpu_loop(CPUX86State *env)
|
| 558 |
{
|
| 559 |
int trapnr;
|
| 560 |
int ret;
|
| 561 |
uint8_t *pc; |
| 562 |
target_siginfo_t info; |
| 563 |
|
| 564 |
for(;;) {
|
| 565 |
trapnr = cpu_x86_exec(env); |
| 566 |
uint32_t *params = (uint32_t *)env->regs[R_ESP]; |
| 567 |
switch(trapnr) {
|
| 568 |
case 0x79: /* Our commpage hack back door exit is here */ |
| 569 |
do_commpage(env, env->eip, *(params + 1), *(params + 2), |
| 570 |
*(params + 3), *(params + 4), |
| 571 |
*(params + 5), *(params + 6), |
| 572 |
*(params + 7), *(params + 8)); |
| 573 |
break;
|
| 574 |
case 0x81: /* mach syscall */ |
| 575 |
{
|
| 576 |
ret = do_mach_syscall(env, env->regs[R_EAX], |
| 577 |
*(params + 1), *(params + 2), |
| 578 |
*(params + 3), *(params + 4), |
| 579 |
*(params + 5), *(params + 6), |
| 580 |
*(params + 7), *(params + 8)); |
| 581 |
set_error(env, ret); |
| 582 |
break;
|
| 583 |
} |
| 584 |
case 0x90: /* unix backdoor */ |
| 585 |
{
|
| 586 |
/* after sysenter, stack is in R_ECX, new eip in R_EDX (sysexit will flip them back)*/
|
| 587 |
int saved_stack = env->regs[R_ESP];
|
| 588 |
env->regs[R_ESP] = env->regs[R_ECX]; |
| 589 |
|
| 590 |
ret = do_unix_syscall(env, env->regs[R_EAX]); |
| 591 |
|
| 592 |
env->regs[R_ECX] = env->regs[R_ESP]; |
| 593 |
env->regs[R_ESP] = saved_stack; |
| 594 |
|
| 595 |
set_error(env, ret); |
| 596 |
break;
|
| 597 |
} |
| 598 |
case 0x80: /* unix syscall */ |
| 599 |
{
|
| 600 |
ret = do_unix_syscall(env, env->regs[R_EAX]/*,
|
| 601 |
*(params + 1), *(params + 2),
|
| 602 |
*(params + 3), *(params + 4),
|
| 603 |
*(params + 5), *(params + 6),
|
| 604 |
*(params + 7), *(params + 8)*/);
|
| 605 |
set_error(env, ret); |
| 606 |
break;
|
| 607 |
} |
| 608 |
case 0x82: /* thread syscall */ |
| 609 |
{
|
| 610 |
ret = do_thread_syscall(env, env->regs[R_EAX], |
| 611 |
*(params + 1), *(params + 2), |
| 612 |
*(params + 3), *(params + 4), |
| 613 |
*(params + 5), *(params + 6), |
| 614 |
*(params + 7), *(params + 8)); |
| 615 |
set_error(env, ret); |
| 616 |
break;
|
| 617 |
} |
| 618 |
case EXCP0B_NOSEG:
|
| 619 |
case EXCP0C_STACK:
|
| 620 |
info.si_signo = SIGBUS; |
| 621 |
info.si_errno = 0;
|
| 622 |
info.si_code = BUS_NOOP; |
| 623 |
info.si_addr = 0;
|
| 624 |
gdb_handlesig (env, SIGBUS); |
| 625 |
queue_signal(info.si_signo, &info); |
| 626 |
break;
|
| 627 |
case EXCP0D_GPF:
|
| 628 |
info.si_signo = SIGSEGV; |
| 629 |
info.si_errno = 0;
|
| 630 |
info.si_code = SEGV_NOOP; |
| 631 |
info.si_addr = 0;
|
| 632 |
gdb_handlesig (env, SIGSEGV); |
| 633 |
queue_signal(info.si_signo, &info); |
| 634 |
break;
|
| 635 |
case EXCP0E_PAGE:
|
| 636 |
info.si_signo = SIGSEGV; |
| 637 |
info.si_errno = 0;
|
| 638 |
if (!(env->error_code & 1)) |
| 639 |
info.si_code = SEGV_MAPERR; |
| 640 |
else
|
| 641 |
info.si_code = SEGV_ACCERR; |
| 642 |
info.si_addr = (void*)env->cr[2]; |
| 643 |
gdb_handlesig (env, SIGSEGV); |
| 644 |
queue_signal(info.si_signo, &info); |
| 645 |
break;
|
| 646 |
case EXCP00_DIVZ:
|
| 647 |
/* division by zero */
|
| 648 |
info.si_signo = SIGFPE; |
| 649 |
info.si_errno = 0;
|
| 650 |
info.si_code = FPE_INTDIV; |
| 651 |
info.si_addr = (void*)env->eip;
|
| 652 |
gdb_handlesig (env, SIGFPE); |
| 653 |
queue_signal(info.si_signo, &info); |
| 654 |
break;
|
| 655 |
case EXCP01_SSTP:
|
| 656 |
case EXCP03_INT3:
|
| 657 |
info.si_signo = SIGTRAP; |
| 658 |
info.si_errno = 0;
|
| 659 |
info.si_code = TRAP_BRKPT; |
| 660 |
info.si_addr = (void*)env->eip;
|
| 661 |
gdb_handlesig (env, SIGTRAP); |
| 662 |
queue_signal(info.si_signo, &info); |
| 663 |
break;
|
| 664 |
case EXCP04_INTO:
|
| 665 |
case EXCP05_BOUND:
|
| 666 |
info.si_signo = SIGSEGV; |
| 667 |
info.si_errno = 0;
|
| 668 |
info.si_code = SEGV_NOOP; |
| 669 |
info.si_addr = 0;
|
| 670 |
gdb_handlesig (env, SIGSEGV); |
| 671 |
queue_signal(info.si_signo, &info); |
| 672 |
break;
|
| 673 |
case EXCP06_ILLOP:
|
| 674 |
info.si_signo = SIGILL; |
| 675 |
info.si_errno = 0;
|
| 676 |
info.si_code = ILL_ILLOPN; |
| 677 |
info.si_addr = (void*)env->eip;
|
| 678 |
gdb_handlesig (env, SIGILL); |
| 679 |
queue_signal(info.si_signo, &info); |
| 680 |
break;
|
| 681 |
case EXCP_INTERRUPT:
|
| 682 |
/* just indicate that signals should be handled asap */
|
| 683 |
break;
|
| 684 |
case EXCP_DEBUG:
|
| 685 |
{
|
| 686 |
int sig;
|
| 687 |
|
| 688 |
sig = gdb_handlesig (env, SIGTRAP); |
| 689 |
if (sig)
|
| 690 |
{
|
| 691 |
info.si_signo = sig; |
| 692 |
info.si_errno = 0;
|
| 693 |
info.si_code = TRAP_BRKPT; |
| 694 |
queue_signal(info.si_signo, &info); |
| 695 |
} |
| 696 |
} |
| 697 |
break;
|
| 698 |
default:
|
| 699 |
pc = (void*)(env->segs[R_CS].base + env->eip);
|
| 700 |
fprintf(stderr, "qemu: 0x%08lx: unhandled CPU exception 0x%x - aborting\n",
|
| 701 |
(long)pc, trapnr);
|
| 702 |
abort(); |
| 703 |
} |
| 704 |
process_pending_signals(env); |
| 705 |
} |
| 706 |
} |
| 707 |
#endif
|
| 708 |
|
| 709 |
void usage(void) |
| 710 |
{
|
| 711 |
printf("qemu-" TARGET_ARCH " version " QEMU_VERSION ", Copyright (c) 2003-2004 Fabrice Bellard\n" |
| 712 |
"usage: qemu-" TARGET_ARCH " [-h] [-d opts] [-L path] [-s size] program [arguments...]\n" |
| 713 |
"Darwin CPU emulator (compiled for %s emulation)\n"
|
| 714 |
"\n"
|
| 715 |
"-h print this help\n"
|
| 716 |
"-L path set the %s library path (default='%s')\n"
|
| 717 |
"-s size set the stack size in bytes (default=%ld)\n"
|
| 718 |
"\n"
|
| 719 |
"debug options:\n"
|
| 720 |
"-d options activate log (logfile='%s')\n"
|
| 721 |
"-g wait for gdb on port 1234\n"
|
| 722 |
"-p pagesize set the host page size to 'pagesize'\n",
|
| 723 |
"-singlestep always run in singlestep mode\n"
|
| 724 |
TARGET_ARCH, |
| 725 |
TARGET_ARCH, |
| 726 |
interp_prefix, |
| 727 |
stack_size, |
| 728 |
DEBUG_LOGFILE); |
| 729 |
exit(1);
|
| 730 |
} |
| 731 |
|
| 732 |
/* XXX: currently only used for async signals (see signal.c) */
|
| 733 |
CPUState *global_env; |
| 734 |
/* used only if single thread */
|
| 735 |
CPUState *cpu_single_env = NULL;
|
| 736 |
|
| 737 |
/* used to free thread contexts */
|
| 738 |
TaskState *first_task_state; |
| 739 |
|
| 740 |
int main(int argc, char **argv) |
| 741 |
{
|
| 742 |
const char *filename; |
| 743 |
struct target_pt_regs regs1, *regs = ®s1;
|
| 744 |
TaskState ts1, *ts = &ts1; |
| 745 |
CPUState *env; |
| 746 |
int optind;
|
| 747 |
short use_gdbstub = 0; |
| 748 |
const char *r; |
| 749 |
const char *cpu_model; |
| 750 |
|
| 751 |
if (argc <= 1) |
| 752 |
usage(); |
| 753 |
|
| 754 |
/* init debug */
|
| 755 |
cpu_set_log_filename(DEBUG_LOGFILE); |
| 756 |
|
| 757 |
optind = 1;
|
| 758 |
for(;;) {
|
| 759 |
if (optind >= argc)
|
| 760 |
break;
|
| 761 |
r = argv[optind]; |
| 762 |
if (r[0] != '-') |
| 763 |
break;
|
| 764 |
optind++; |
| 765 |
r++; |
| 766 |
if (!strcmp(r, "-")) { |
| 767 |
break;
|
| 768 |
} else if (!strcmp(r, "d")) { |
| 769 |
int mask;
|
| 770 |
CPULogItem *item; |
| 771 |
|
| 772 |
if (optind >= argc)
|
| 773 |
break;
|
| 774 |
|
| 775 |
r = argv[optind++]; |
| 776 |
mask = cpu_str_to_log_mask(r); |
| 777 |
if (!mask) {
|
| 778 |
printf("Log items (comma separated):\n");
|
| 779 |
for(item = cpu_log_items; item->mask != 0; item++) { |
| 780 |
printf("%-10s %s\n", item->name, item->help);
|
| 781 |
} |
| 782 |
exit(1);
|
| 783 |
} |
| 784 |
cpu_set_log(mask); |
| 785 |
} else if (!strcmp(r, "s")) { |
| 786 |
r = argv[optind++]; |
| 787 |
stack_size = strtol(r, (char **)&r, 0); |
| 788 |
if (stack_size <= 0) |
| 789 |
usage(); |
| 790 |
if (*r == 'M') |
| 791 |
stack_size *= 1024 * 1024; |
| 792 |
else if (*r == 'k' || *r == 'K') |
| 793 |
stack_size *= 1024;
|
| 794 |
} else if (!strcmp(r, "L")) { |
| 795 |
interp_prefix = argv[optind++]; |
| 796 |
} else if (!strcmp(r, "p")) { |
| 797 |
qemu_host_page_size = atoi(argv[optind++]); |
| 798 |
if (qemu_host_page_size == 0 || |
| 799 |
(qemu_host_page_size & (qemu_host_page_size - 1)) != 0) { |
| 800 |
fprintf(stderr, "page size must be a power of two\n");
|
| 801 |
exit(1);
|
| 802 |
} |
| 803 |
} else
|
| 804 |
if (!strcmp(r, "g")) { |
| 805 |
use_gdbstub = 1;
|
| 806 |
} else if (!strcmp(r, "cpu")) { |
| 807 |
cpu_model = argv[optind++]; |
| 808 |
if (strcmp(cpu_model, "?") == 0) { |
| 809 |
/* XXX: implement xxx_cpu_list for targets that still miss it */
|
| 810 |
#if defined(cpu_list)
|
| 811 |
cpu_list(stdout, &fprintf); |
| 812 |
#endif
|
| 813 |
exit(1);
|
| 814 |
} |
| 815 |
} else if (!strcmp(r, "singlestep")) { |
| 816 |
singlestep = 1;
|
| 817 |
} else
|
| 818 |
{
|
| 819 |
usage(); |
| 820 |
} |
| 821 |
} |
| 822 |
if (optind >= argc)
|
| 823 |
usage(); |
| 824 |
filename = argv[optind]; |
| 825 |
|
| 826 |
/* Zero out regs */
|
| 827 |
memset(regs, 0, sizeof(struct target_pt_regs)); |
| 828 |
|
| 829 |
if (cpu_model == NULL) { |
| 830 |
#if defined(TARGET_I386)
|
| 831 |
#ifdef TARGET_X86_64
|
| 832 |
cpu_model = "qemu64";
|
| 833 |
#else
|
| 834 |
cpu_model = "qemu32";
|
| 835 |
#endif
|
| 836 |
#elif defined(TARGET_PPC)
|
| 837 |
#ifdef TARGET_PPC64
|
| 838 |
cpu_model = "970";
|
| 839 |
#else
|
| 840 |
cpu_model = "750";
|
| 841 |
#endif
|
| 842 |
#else
|
| 843 |
#error unsupported CPU
|
| 844 |
#endif
|
| 845 |
} |
| 846 |
|
| 847 |
cpu_exec_init_all(0);
|
| 848 |
/* NOTE: we need to init the CPU at this stage to get
|
| 849 |
qemu_host_page_size */
|
| 850 |
env = cpu_init(cpu_model); |
| 851 |
|
| 852 |
printf("Starting %s with qemu\n----------------\n", filename);
|
| 853 |
|
| 854 |
commpage_init(); |
| 855 |
|
| 856 |
if (mach_exec(filename, argv+optind, environ, regs) != 0) { |
| 857 |
printf("Error loading %s\n", filename);
|
| 858 |
_exit(1);
|
| 859 |
} |
| 860 |
|
| 861 |
syscall_init(); |
| 862 |
signal_init(); |
| 863 |
global_env = env; |
| 864 |
|
| 865 |
/* build Task State */
|
| 866 |
memset(ts, 0, sizeof(TaskState)); |
| 867 |
env->opaque = ts; |
| 868 |
ts->used = 1;
|
| 869 |
|
| 870 |
#if defined(TARGET_I386)
|
| 871 |
cpu_x86_set_cpl(env, 3);
|
| 872 |
|
| 873 |
env->cr[0] = CR0_PG_MASK | CR0_WP_MASK | CR0_PE_MASK;
|
| 874 |
env->hflags |= HF_PE_MASK; |
| 875 |
|
| 876 |
if (env->cpuid_features & CPUID_SSE) {
|
| 877 |
env->cr[4] |= CR4_OSFXSR_MASK;
|
| 878 |
env->hflags |= HF_OSFXSR_MASK; |
| 879 |
} |
| 880 |
|
| 881 |
/* flags setup : we activate the IRQs by default as in user mode */
|
| 882 |
env->eflags |= IF_MASK; |
| 883 |
|
| 884 |
/* darwin register setup */
|
| 885 |
env->regs[R_EAX] = regs->eax; |
| 886 |
env->regs[R_EBX] = regs->ebx; |
| 887 |
env->regs[R_ECX] = regs->ecx; |
| 888 |
env->regs[R_EDX] = regs->edx; |
| 889 |
env->regs[R_ESI] = regs->esi; |
| 890 |
env->regs[R_EDI] = regs->edi; |
| 891 |
env->regs[R_EBP] = regs->ebp; |
| 892 |
env->regs[R_ESP] = regs->esp; |
| 893 |
env->eip = regs->eip; |
| 894 |
|
| 895 |
/* Darwin LDT setup */
|
| 896 |
/* 2 - User code segment
|
| 897 |
3 - User data segment
|
| 898 |
4 - User cthread */
|
| 899 |
bzero(ldt_table, LDT_TABLE_SIZE * sizeof(ldt_table[0])); |
| 900 |
env->ldt.base = (uint32_t) ldt_table; |
| 901 |
env->ldt.limit = sizeof(ldt_table) - 1; |
| 902 |
|
| 903 |
write_dt(ldt_table + 2, 0, 0xfffff, |
| 904 |
DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK | |
| 905 |
(3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT)); |
| 906 |
write_dt(ldt_table + 3, 0, 0xfffff, |
| 907 |
DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK | |
| 908 |
(3 << DESC_DPL_SHIFT) | (0x2 << DESC_TYPE_SHIFT)); |
| 909 |
write_dt(ldt_table + 4, 0, 0xfffff, |
| 910 |
DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK | |
| 911 |
(3 << DESC_DPL_SHIFT) | (0x2 << DESC_TYPE_SHIFT)); |
| 912 |
|
| 913 |
/* Darwin GDT setup.
|
| 914 |
* has changed a lot between old Darwin/x86 (pre-Mac Intel) and Mac OS X/x86,
|
| 915 |
now everything is done via int 0x81(mach) int 0x82 (thread) and sysenter/sysexit(unix) */
|
| 916 |
bzero(gdt_table, sizeof(gdt_table));
|
| 917 |
env->gdt.base = (uint32_t)gdt_table; |
| 918 |
env->gdt.limit = sizeof(gdt_table) - 1; |
| 919 |
|
| 920 |
/* Set up a back door to handle sysenter syscalls (unix) */
|
| 921 |
char * syscallbackdoor = malloc(64); |
| 922 |
page_set_flags((int)syscallbackdoor, (int)syscallbackdoor + 64, PROT_EXEC | PROT_READ | PAGE_VALID); |
| 923 |
|
| 924 |
int i = 0; |
| 925 |
syscallbackdoor[i++] = 0xcd;
|
| 926 |
syscallbackdoor[i++] = 0x90; /* int 0x90 */ |
| 927 |
syscallbackdoor[i++] = 0x0F;
|
| 928 |
syscallbackdoor[i++] = 0x35; /* sysexit */ |
| 929 |
|
| 930 |
/* Darwin sysenter/sysexit setup */
|
| 931 |
env->sysenter_cs = 0x1; //XXX |
| 932 |
env->sysenter_eip = (int)syscallbackdoor;
|
| 933 |
env->sysenter_esp = (int)malloc(64); |
| 934 |
|
| 935 |
/* Darwin TSS setup
|
| 936 |
This must match up with GDT[4] */
|
| 937 |
env->tr.base = (uint32_t) tss; |
| 938 |
env->tr.limit = sizeof(tss) - 1; |
| 939 |
env->tr.flags = DESC_P_MASK | (0x9 << DESC_TYPE_SHIFT);
|
| 940 |
stw(tss + 2, 0x10); // ss0 = 0x10 = GDT[2] = Kernel Data Segment |
| 941 |
|
| 942 |
/* Darwin interrupt setup */
|
| 943 |
bzero(idt_table, sizeof(idt_table));
|
| 944 |
env->idt.base = (uint32_t) idt_table; |
| 945 |
env->idt.limit = sizeof(idt_table) - 1; |
| 946 |
set_idt(0, 0); |
| 947 |
set_idt(1, 0); |
| 948 |
set_idt(2, 0); |
| 949 |
set_idt(3, 3); |
| 950 |
set_idt(4, 3); |
| 951 |
set_idt(5, 3); |
| 952 |
set_idt(6, 0); |
| 953 |
set_idt(7, 0); |
| 954 |
set_idt(8, 0); |
| 955 |
set_idt(9, 0); |
| 956 |
set_idt(10, 0); |
| 957 |
set_idt(11, 0); |
| 958 |
set_idt(12, 0); |
| 959 |
set_idt(13, 0); |
| 960 |
set_idt(14, 0); |
| 961 |
set_idt(15, 0); |
| 962 |
set_idt(16, 0); |
| 963 |
set_idt(17, 0); |
| 964 |
set_idt(18, 0); |
| 965 |
set_idt(19, 0); |
| 966 |
/* Syscalls are done via
|
| 967 |
int 0x80 (unix) (rarely used)
|
| 968 |
int 0x81 (mach)
|
| 969 |
int 0x82 (thread)
|
| 970 |
int 0x83 (diag) (not handled here)
|
| 971 |
sysenter/sysexit (unix) -> we redirect that to int 0x90 */
|
| 972 |
set_idt(0x79, 3); /* Commpage hack, here is our backdoor interrupt */ |
| 973 |
set_idt(0x80, 3); /* Unix Syscall */ |
| 974 |
set_idt(0x81, 3); /* Mach Syscalls */ |
| 975 |
set_idt(0x82, 3); /* thread Syscalls */ |
| 976 |
|
| 977 |
set_idt(0x90, 3); /* qemu-darwin-user's Unix syscalls backdoor */ |
| 978 |
|
| 979 |
|
| 980 |
cpu_x86_load_seg(env, R_CS, __USER_CS); |
| 981 |
cpu_x86_load_seg(env, R_DS, __USER_DS); |
| 982 |
cpu_x86_load_seg(env, R_ES, __USER_DS); |
| 983 |
cpu_x86_load_seg(env, R_SS, __USER_DS); |
| 984 |
cpu_x86_load_seg(env, R_FS, __USER_DS); |
| 985 |
cpu_x86_load_seg(env, R_GS, __USER_DS); |
| 986 |
|
| 987 |
#elif defined(TARGET_PPC)
|
| 988 |
{
|
| 989 |
int i;
|
| 990 |
|
| 991 |
#if defined(TARGET_PPC64)
|
| 992 |
#if defined(TARGET_ABI32)
|
| 993 |
env->msr &= ~((target_ulong)1 << MSR_SF);
|
| 994 |
#else
|
| 995 |
env->msr |= (target_ulong)1 << MSR_SF;
|
| 996 |
#endif
|
| 997 |
#endif
|
| 998 |
env->nip = regs->nip; |
| 999 |
for(i = 0; i < 32; i++) { |
| 1000 |
env->gpr[i] = regs->gpr[i]; |
| 1001 |
} |
| 1002 |
} |
| 1003 |
#else
|
| 1004 |
#error unsupported target CPU
|
| 1005 |
#endif
|
| 1006 |
|
| 1007 |
if (use_gdbstub) {
|
| 1008 |
printf("Waiting for gdb Connection on port 1234...\n");
|
| 1009 |
gdbserver_start (1234);
|
| 1010 |
gdb_handlesig(env, 0);
|
| 1011 |
} |
| 1012 |
|
| 1013 |
cpu_loop(env); |
| 1014 |
/* never exits */
|
| 1015 |
return 0; |
| 1016 |
} |