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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., 675 Mass Ave, Cambridge, MA 02139, 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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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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void cpu_outb(CPUState *env, int addr, int val) |
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{ |
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fprintf(stderr, "outb: port=0x%04x, data=%02x\n", addr, val);
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} |
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void cpu_outw(CPUState *env, int addr, int val) |
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{ |
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fprintf(stderr, "outw: port=0x%04x, data=%04x\n", addr, val);
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} |
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void cpu_outl(CPUState *env, int addr, int val) |
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{ |
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fprintf(stderr, "outl: port=0x%04x, data=%08x\n", addr, val);
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} |
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int cpu_inb(CPUState *env, int addr) |
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{ |
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fprintf(stderr, "inb: port=0x%04x\n", addr);
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return 0; |
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} |
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int cpu_inw(CPUState *env, int addr) |
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{ |
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fprintf(stderr, "inw: port=0x%04x\n", addr);
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return 0; |
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} |
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int cpu_inl(CPUState *env, int addr) |
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{ |
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fprintf(stderr, "inl: port=0x%04x\n", addr);
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return 0; |
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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, args...) \
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do { \
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fprintf(stderr, fmt , ##args); \ |
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cpu_dump_state(env, stderr, fprintf, 0); \
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if (loglevel != 0) { \ |
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fprintf(logfile, fmt , ##args); \ |
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cpu_dump_state(env, logfile, fprintf, 0); \
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} \ |
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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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env->fpscr[7] |= 0x8; |
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/* Finally, update FEX */
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if ((((env->fpscr[7] & 0x3) << 3) | (env->fpscr[6] >> 1)) & |
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((env->fpscr[1] << 1) | (env->fpscr[0] >> 3))) |
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env->fpscr[7] |= 0x4; |
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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_VXNAN:
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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); |
364 |
break;
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#if defined(TARGET_PPCEMB)
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case POWERPC_EXCP_SPEU: /* SPE/embedded floating-point unavail. */ |
367 |
EXCP_DUMP(env, "No SPE/floating-point instruction allowed\n");
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info.si_signo = SIGILL; |
369 |
info.si_errno = 0;
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info.si_code = ILL_COPROC; |
371 |
info.si_addr = (void*)(env->nip - 4); |
372 |
queue_signal(info.si_signo, &info); |
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break;
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case POWERPC_EXCP_EFPDI: /* Embedded floating-point data IRQ */ |
375 |
cpu_abort(env, "Embedded floating-point data IRQ not handled\n");
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break;
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377 |
case POWERPC_EXCP_EFPRI: /* Embedded floating-point round IRQ */ |
378 |
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 */ |
381 |
cpu_abort(env, "Performance monitor exception not handled\n");
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382 |
break;
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383 |
case POWERPC_EXCP_DOORI: /* Embedded doorbell interrupt */ |
384 |
cpu_abort(env, "Doorbell interrupt while in user mode. "
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385 |
"Aborting\n");
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break;
|
387 |
case POWERPC_EXCP_DOORCI: /* Embedded doorbell critical interrupt */ |
388 |
cpu_abort(env, "Doorbell critical interrupt while in user mode. "
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389 |
"Aborting\n");
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390 |
break;
|
391 |
#endif /* defined(TARGET_PPCEMB) */ |
392 |
case POWERPC_EXCP_RESET: /* System reset exception */ |
393 |
cpu_abort(env, "Reset interrupt while in user mode. "
|
394 |
"Aborting\n");
|
395 |
break;
|
396 |
#if defined(TARGET_PPC64) /* PowerPC 64 */ |
397 |
case POWERPC_EXCP_DSEG: /* Data segment exception */ |
398 |
cpu_abort(env, "Data segment exception while in user mode. "
|
399 |
"Aborting\n");
|
400 |
break;
|
401 |
case POWERPC_EXCP_ISEG: /* Instruction segment exception */ |
402 |
cpu_abort(env, "Instruction segment exception "
|
403 |
"while in user mode. Aborting\n");
|
404 |
break;
|
405 |
#endif /* defined(TARGET_PPC64) */ |
406 |
#if defined(TARGET_PPC64H) /* PowerPC 64 with hypervisor mode support */ |
407 |
case POWERPC_EXCP_HDECR: /* Hypervisor decrementer exception */ |
408 |
cpu_abort(env, "Hypervisor decrementer interrupt "
|
409 |
"while in user mode. Aborting\n");
|
410 |
break;
|
411 |
#endif /* defined(TARGET_PPC64H) */ |
412 |
case POWERPC_EXCP_TRACE: /* Trace exception */ |
413 |
/* Nothing to do:
|
414 |
* we use this exception to emulate step-by-step execution mode.
|
415 |
*/
|
416 |
break;
|
417 |
#if defined(TARGET_PPC64H) /* PowerPC 64 with hypervisor mode support */ |
418 |
case POWERPC_EXCP_HDSI: /* Hypervisor data storage exception */ |
419 |
cpu_abort(env, "Hypervisor data storage exception "
|
420 |
"while in user mode. Aborting\n");
|
421 |
break;
|
422 |
case POWERPC_EXCP_HISI: /* Hypervisor instruction storage excp */ |
423 |
cpu_abort(env, "Hypervisor instruction storage exception "
|
424 |
"while in user mode. Aborting\n");
|
425 |
break;
|
426 |
case POWERPC_EXCP_HDSEG: /* Hypervisor data segment exception */ |
427 |
cpu_abort(env, "Hypervisor data segment exception "
|
428 |
"while in user mode. Aborting\n");
|
429 |
break;
|
430 |
case POWERPC_EXCP_HISEG: /* Hypervisor instruction segment excp */ |
431 |
cpu_abort(env, "Hypervisor instruction segment exception "
|
432 |
"while in user mode. Aborting\n");
|
433 |
break;
|
434 |
#endif /* defined(TARGET_PPC64H) */ |
435 |
case POWERPC_EXCP_VPU: /* Vector unavailable exception */ |
436 |
EXCP_DUMP(env, "No Altivec instructions allowed\n");
|
437 |
info.si_signo = SIGILL; |
438 |
info.si_errno = 0;
|
439 |
info.si_code = ILL_COPROC; |
440 |
info.si_addr = (void*)(env->nip - 4); |
441 |
queue_signal(info.si_signo, &info); |
442 |
break;
|
443 |
case POWERPC_EXCP_PIT: /* Programmable interval timer IRQ */ |
444 |
cpu_abort(env, "Programable interval timer interrupt "
|
445 |
"while in user mode. Aborting\n");
|
446 |
break;
|
447 |
case POWERPC_EXCP_IO: /* IO error exception */ |
448 |
cpu_abort(env, "IO error exception while in user mode. "
|
449 |
"Aborting\n");
|
450 |
break;
|
451 |
case POWERPC_EXCP_RUNM: /* Run mode exception */ |
452 |
cpu_abort(env, "Run mode exception while in user mode. "
|
453 |
"Aborting\n");
|
454 |
break;
|
455 |
case POWERPC_EXCP_EMUL: /* Emulation trap exception */ |
456 |
cpu_abort(env, "Emulation trap exception not handled\n");
|
457 |
break;
|
458 |
case POWERPC_EXCP_IFTLB: /* Instruction fetch TLB error */ |
459 |
cpu_abort(env, "Instruction fetch TLB exception "
|
460 |
"while in user-mode. Aborting");
|
461 |
break;
|
462 |
case POWERPC_EXCP_DLTLB: /* Data load TLB miss */ |
463 |
cpu_abort(env, "Data load TLB exception while in user-mode. "
|
464 |
"Aborting");
|
465 |
break;
|
466 |
case POWERPC_EXCP_DSTLB: /* Data store TLB miss */ |
467 |
cpu_abort(env, "Data store TLB exception while in user-mode. "
|
468 |
"Aborting");
|
469 |
break;
|
470 |
case POWERPC_EXCP_FPA: /* Floating-point assist exception */ |
471 |
cpu_abort(env, "Floating-point assist exception not handled\n");
|
472 |
break;
|
473 |
case POWERPC_EXCP_IABR: /* Instruction address breakpoint */ |
474 |
cpu_abort(env, "Instruction address breakpoint exception "
|
475 |
"not handled\n");
|
476 |
break;
|
477 |
case POWERPC_EXCP_SMI: /* System management interrupt */ |
478 |
cpu_abort(env, "System management interrupt while in user mode. "
|
479 |
"Aborting\n");
|
480 |
break;
|
481 |
case POWERPC_EXCP_THERM: /* Thermal interrupt */ |
482 |
cpu_abort(env, "Thermal interrupt interrupt while in user mode. "
|
483 |
"Aborting\n");
|
484 |
break;
|
485 |
case POWERPC_EXCP_PERFM: /* Embedded performance monitor IRQ */ |
486 |
cpu_abort(env, "Performance monitor exception not handled\n");
|
487 |
break;
|
488 |
case POWERPC_EXCP_VPUA: /* Vector assist exception */ |
489 |
cpu_abort(env, "Vector assist exception not handled\n");
|
490 |
break;
|
491 |
case POWERPC_EXCP_SOFTP: /* Soft patch exception */ |
492 |
cpu_abort(env, "Soft patch exception not handled\n");
|
493 |
break;
|
494 |
case POWERPC_EXCP_MAINT: /* Maintenance exception */ |
495 |
cpu_abort(env, "Maintenance exception while in user mode. "
|
496 |
"Aborting\n");
|
497 |
break;
|
498 |
case POWERPC_EXCP_STOP: /* stop translation */ |
499 |
/* We did invalidate the instruction cache. Go on */
|
500 |
break;
|
501 |
case POWERPC_EXCP_BRANCH: /* branch instruction: */ |
502 |
/* We just stopped because of a branch. Go on */
|
503 |
break;
|
504 |
case POWERPC_EXCP_SYSCALL_USER:
|
505 |
/* system call in user-mode emulation */
|
506 |
/* system call */
|
507 |
if(((int)env->gpr[0]) <= SYS_MAXSYSCALL && ((int)env->gpr[0])>0) |
508 |
ret = do_unix_syscall(env, env->gpr[0]/*, env->gpr[3], env->gpr[4], |
509 |
env->gpr[5], env->gpr[6], env->gpr[7],
|
510 |
env->gpr[8], env->gpr[9], env->gpr[10]*/);
|
511 |
else if(((int)env->gpr[0])<0) |
512 |
ret = do_mach_syscall(env, env->gpr[0], env->gpr[3], env->gpr[4], |
513 |
env->gpr[5], env->gpr[6], env->gpr[7], |
514 |
env->gpr[8], env->gpr[9], env->gpr[10]); |
515 |
else
|
516 |
ret = do_thread_syscall(env, env->gpr[0], env->gpr[3], env->gpr[4], |
517 |
env->gpr[5], env->gpr[6], env->gpr[7], |
518 |
env->gpr[8], env->gpr[9], env->gpr[10]); |
519 |
|
520 |
/* Unix syscall error signaling */
|
521 |
if(((int)env->gpr[0]) <= SYS_MAXSYSCALL && ((int)env->gpr[0])>0) |
522 |
{ |
523 |
if( (int)ret < 0 ) |
524 |
env->nip += 0;
|
525 |
else
|
526 |
env->nip += 4;
|
527 |
} |
528 |
|
529 |
/* Return value */
|
530 |
env->gpr[3] = ret;
|
531 |
break;
|
532 |
case EXCP_INTERRUPT:
|
533 |
/* just indicate that signals should be handled asap */
|
534 |
break;
|
535 |
default:
|
536 |
cpu_abort(env, "Unknown exception 0x%d. Aborting\n", trapnr);
|
537 |
break;
|
538 |
} |
539 |
process_pending_signals(env); |
540 |
} |
541 |
} |
542 |
#endif
|
543 |
|
544 |
|
545 |
#ifdef TARGET_I386
|
546 |
|
547 |
/***********************************************************/
|
548 |
/* CPUX86 core interface */
|
549 |
|
550 |
uint64_t cpu_get_tsc(CPUX86State *env) |
551 |
{ |
552 |
return cpu_get_real_ticks();
|
553 |
} |
554 |
|
555 |
void
|
556 |
write_dt(void *ptr, unsigned long addr, unsigned long limit, |
557 |
int flags)
|
558 |
{ |
559 |
unsigned int e1, e2; |
560 |
e1 = (addr << 16) | (limit & 0xffff); |
561 |
e2 = ((addr >> 16) & 0xff) | (addr & 0xff000000) | (limit & 0x000f0000); |
562 |
e2 |= flags; |
563 |
stl((uint8_t *)ptr, e1); |
564 |
stl((uint8_t *)ptr + 4, e2);
|
565 |
} |
566 |
|
567 |
static void set_gate(void *ptr, unsigned int type, unsigned int dpl, |
568 |
unsigned long addr, unsigned int sel) |
569 |
{ |
570 |
unsigned int e1, e2; |
571 |
e1 = (addr & 0xffff) | (sel << 16); |
572 |
e2 = (addr & 0xffff0000) | 0x8000 | (dpl << 13) | (type << 8); |
573 |
stl((uint8_t *)ptr, e1); |
574 |
stl((uint8_t *)ptr + 4, e2);
|
575 |
} |
576 |
|
577 |
#define GDT_TABLE_SIZE 14 |
578 |
#define LDT_TABLE_SIZE 15 |
579 |
#define IDT_TABLE_SIZE 256 |
580 |
#define TSS_SIZE 104 |
581 |
uint64_t gdt_table[GDT_TABLE_SIZE]; |
582 |
uint64_t ldt_table[LDT_TABLE_SIZE]; |
583 |
uint64_t idt_table[IDT_TABLE_SIZE]; |
584 |
uint32_t tss[TSS_SIZE]; |
585 |
|
586 |
/* only dpl matters as we do only user space emulation */
|
587 |
static void set_idt(int n, unsigned int dpl) |
588 |
{ |
589 |
set_gate(idt_table + n, 0, dpl, 0, 0); |
590 |
} |
591 |
|
592 |
/* ABI convention: after a syscall if there was an error the CF flag is set */
|
593 |
static inline void set_error(CPUX86State *env, int ret) |
594 |
{ |
595 |
if(ret<0) |
596 |
env->eflags = env->eflags | 0x1;
|
597 |
else
|
598 |
env->eflags &= ~0x1;
|
599 |
env->regs[R_EAX] = ret; |
600 |
} |
601 |
|
602 |
void cpu_loop(CPUX86State *env)
|
603 |
{ |
604 |
int trapnr;
|
605 |
int ret;
|
606 |
uint8_t *pc; |
607 |
target_siginfo_t info; |
608 |
|
609 |
for(;;) {
|
610 |
trapnr = cpu_x86_exec(env); |
611 |
uint32_t *params = (uint32_t *)env->regs[R_ESP]; |
612 |
switch(trapnr) {
|
613 |
case 0x79: /* Our commpage hack back door exit is here */ |
614 |
do_commpage(env, env->eip, *(params + 1), *(params + 2), |
615 |
*(params + 3), *(params + 4), |
616 |
*(params + 5), *(params + 6), |
617 |
*(params + 7), *(params + 8)); |
618 |
break;
|
619 |
case 0x81: /* mach syscall */ |
620 |
{ |
621 |
ret = do_mach_syscall(env, env->regs[R_EAX], |
622 |
*(params + 1), *(params + 2), |
623 |
*(params + 3), *(params + 4), |
624 |
*(params + 5), *(params + 6), |
625 |
*(params + 7), *(params + 8)); |
626 |
set_error(env, ret); |
627 |
break;
|
628 |
} |
629 |
case 0x90: /* unix backdoor */ |
630 |
{ |
631 |
/* after sysenter, stack is in R_ECX, new eip in R_EDX (sysexit will flip them back)*/
|
632 |
int saved_stack = env->regs[R_ESP];
|
633 |
env->regs[R_ESP] = env->regs[R_ECX]; |
634 |
|
635 |
ret = do_unix_syscall(env, env->regs[R_EAX]); |
636 |
|
637 |
env->regs[R_ECX] = env->regs[R_ESP]; |
638 |
env->regs[R_ESP] = saved_stack; |
639 |
|
640 |
set_error(env, ret); |
641 |
break;
|
642 |
} |
643 |
case 0x80: /* unix syscall */ |
644 |
{ |
645 |
ret = do_unix_syscall(env, env->regs[R_EAX]/*,
|
646 |
*(params + 1), *(params + 2),
|
647 |
*(params + 3), *(params + 4),
|
648 |
*(params + 5), *(params + 6),
|
649 |
*(params + 7), *(params + 8)*/);
|
650 |
set_error(env, ret); |
651 |
break;
|
652 |
} |
653 |
case 0x82: /* thread syscall */ |
654 |
{ |
655 |
ret = do_thread_syscall(env, env->regs[R_EAX], |
656 |
*(params + 1), *(params + 2), |
657 |
*(params + 3), *(params + 4), |
658 |
*(params + 5), *(params + 6), |
659 |
*(params + 7), *(params + 8)); |
660 |
set_error(env, ret); |
661 |
break;
|
662 |
} |
663 |
case EXCP0B_NOSEG:
|
664 |
case EXCP0C_STACK:
|
665 |
info.si_signo = SIGBUS; |
666 |
info.si_errno = 0;
|
667 |
info.si_code = BUS_NOOP; |
668 |
info.si_addr = 0;
|
669 |
gdb_handlesig (env, SIGBUS); |
670 |
queue_signal(info.si_signo, &info); |
671 |
break;
|
672 |
case EXCP0D_GPF:
|
673 |
info.si_signo = SIGSEGV; |
674 |
info.si_errno = 0;
|
675 |
info.si_code = SEGV_NOOP; |
676 |
info.si_addr = 0;
|
677 |
gdb_handlesig (env, SIGSEGV); |
678 |
queue_signal(info.si_signo, &info); |
679 |
break;
|
680 |
case EXCP0E_PAGE:
|
681 |
info.si_signo = SIGSEGV; |
682 |
info.si_errno = 0;
|
683 |
if (!(env->error_code & 1)) |
684 |
info.si_code = SEGV_MAPERR; |
685 |
else
|
686 |
info.si_code = SEGV_ACCERR; |
687 |
info.si_addr = (void*)env->cr[2]; |
688 |
gdb_handlesig (env, SIGSEGV); |
689 |
queue_signal(info.si_signo, &info); |
690 |
break;
|
691 |
case EXCP00_DIVZ:
|
692 |
/* division by zero */
|
693 |
info.si_signo = SIGFPE; |
694 |
info.si_errno = 0;
|
695 |
info.si_code = FPE_INTDIV; |
696 |
info.si_addr = (void*)env->eip;
|
697 |
gdb_handlesig (env, SIGFPE); |
698 |
queue_signal(info.si_signo, &info); |
699 |
break;
|
700 |
case EXCP01_SSTP:
|
701 |
case EXCP03_INT3:
|
702 |
info.si_signo = SIGTRAP; |
703 |
info.si_errno = 0;
|
704 |
info.si_code = TRAP_BRKPT; |
705 |
info.si_addr = (void*)env->eip;
|
706 |
gdb_handlesig (env, SIGTRAP); |
707 |
queue_signal(info.si_signo, &info); |
708 |
break;
|
709 |
case EXCP04_INTO:
|
710 |
case EXCP05_BOUND:
|
711 |
info.si_signo = SIGSEGV; |
712 |
info.si_errno = 0;
|
713 |
info.si_code = SEGV_NOOP; |
714 |
info.si_addr = 0;
|
715 |
gdb_handlesig (env, SIGSEGV); |
716 |
queue_signal(info.si_signo, &info); |
717 |
break;
|
718 |
case EXCP06_ILLOP:
|
719 |
info.si_signo = SIGILL; |
720 |
info.si_errno = 0;
|
721 |
info.si_code = ILL_ILLOPN; |
722 |
info.si_addr = (void*)env->eip;
|
723 |
gdb_handlesig (env, SIGILL); |
724 |
queue_signal(info.si_signo, &info); |
725 |
break;
|
726 |
case EXCP_INTERRUPT:
|
727 |
/* just indicate that signals should be handled asap */
|
728 |
break;
|
729 |
case EXCP_DEBUG:
|
730 |
{ |
731 |
int sig;
|
732 |
|
733 |
sig = gdb_handlesig (env, SIGTRAP); |
734 |
if (sig)
|
735 |
{ |
736 |
info.si_signo = sig; |
737 |
info.si_errno = 0;
|
738 |
info.si_code = TRAP_BRKPT; |
739 |
queue_signal(info.si_signo, &info); |
740 |
} |
741 |
} |
742 |
break;
|
743 |
default:
|
744 |
pc = (void*)(env->segs[R_CS].base + env->eip);
|
745 |
fprintf(stderr, "qemu: 0x%08lx: unhandled CPU exception 0x%x - aborting\n",
|
746 |
(long)pc, trapnr);
|
747 |
abort(); |
748 |
} |
749 |
process_pending_signals(env); |
750 |
} |
751 |
} |
752 |
#endif
|
753 |
|
754 |
void usage(void) |
755 |
{ |
756 |
printf("qemu-" TARGET_ARCH " version " QEMU_VERSION ", Copyright (c) 2003-2004 Fabrice Bellard\n" |
757 |
"usage: qemu-" TARGET_ARCH " [-h] [-d opts] [-L path] [-s size] program [arguments...]\n" |
758 |
"Darwin CPU emulator (compiled for %s emulation)\n"
|
759 |
"\n"
|
760 |
"-h print this help\n"
|
761 |
"-L path set the %s library path (default='%s')\n"
|
762 |
"-s size set the stack size in bytes (default=%ld)\n"
|
763 |
"\n"
|
764 |
"debug options:\n"
|
765 |
#ifdef USE_CODE_COPY
|
766 |
"-no-code-copy disable code copy acceleration\n"
|
767 |
#endif
|
768 |
"-d options activate log (logfile='%s')\n"
|
769 |
"-g wait for gdb on port 1234\n"
|
770 |
"-p pagesize set the host page size to 'pagesize'\n",
|
771 |
TARGET_ARCH, |
772 |
TARGET_ARCH, |
773 |
interp_prefix, |
774 |
stack_size, |
775 |
DEBUG_LOGFILE); |
776 |
_exit(1);
|
777 |
} |
778 |
|
779 |
/* XXX: currently only used for async signals (see signal.c) */
|
780 |
CPUState *global_env; |
781 |
/* used only if single thread */
|
782 |
CPUState *cpu_single_env = NULL;
|
783 |
|
784 |
/* used to free thread contexts */
|
785 |
TaskState *first_task_state; |
786 |
|
787 |
int main(int argc, char **argv) |
788 |
{ |
789 |
const char *filename; |
790 |
struct target_pt_regs regs1, *regs = ®s1;
|
791 |
TaskState ts1, *ts = &ts1; |
792 |
CPUState *env; |
793 |
int optind;
|
794 |
short use_gdbstub = 0; |
795 |
const char *r; |
796 |
|
797 |
if (argc <= 1) |
798 |
usage(); |
799 |
|
800 |
/* init debug */
|
801 |
cpu_set_log_filename(DEBUG_LOGFILE); |
802 |
|
803 |
optind = 1;
|
804 |
for(;;) {
|
805 |
if (optind >= argc)
|
806 |
break;
|
807 |
r = argv[optind]; |
808 |
if (r[0] != '-') |
809 |
break;
|
810 |
optind++; |
811 |
r++; |
812 |
if (!strcmp(r, "-")) { |
813 |
break;
|
814 |
} else if (!strcmp(r, "d")) { |
815 |
int mask;
|
816 |
CPULogItem *item; |
817 |
|
818 |
if (optind >= argc)
|
819 |
break;
|
820 |
|
821 |
r = argv[optind++]; |
822 |
mask = cpu_str_to_log_mask(r); |
823 |
if (!mask) {
|
824 |
printf("Log items (comma separated):\n");
|
825 |
for(item = cpu_log_items; item->mask != 0; item++) { |
826 |
printf("%-10s %s\n", item->name, item->help);
|
827 |
} |
828 |
exit(1);
|
829 |
} |
830 |
cpu_set_log(mask); |
831 |
} else if (!strcmp(r, "s")) { |
832 |
r = argv[optind++]; |
833 |
stack_size = strtol(r, (char **)&r, 0); |
834 |
if (stack_size <= 0) |
835 |
usage(); |
836 |
if (*r == 'M') |
837 |
stack_size *= 1024 * 1024; |
838 |
else if (*r == 'k' || *r == 'K') |
839 |
stack_size *= 1024;
|
840 |
} else if (!strcmp(r, "L")) { |
841 |
interp_prefix = argv[optind++]; |
842 |
} else if (!strcmp(r, "p")) { |
843 |
qemu_host_page_size = atoi(argv[optind++]); |
844 |
if (qemu_host_page_size == 0 || |
845 |
(qemu_host_page_size & (qemu_host_page_size - 1)) != 0) { |
846 |
fprintf(stderr, "page size must be a power of two\n");
|
847 |
exit(1);
|
848 |
} |
849 |
} else
|
850 |
if (!strcmp(r, "g")) { |
851 |
use_gdbstub = 1;
|
852 |
} else
|
853 |
#ifdef USE_CODE_COPY
|
854 |
if (!strcmp(r, "no-code-copy")) { |
855 |
code_copy_enabled = 0;
|
856 |
} else
|
857 |
#endif
|
858 |
{ |
859 |
usage(); |
860 |
} |
861 |
} |
862 |
if (optind >= argc)
|
863 |
usage(); |
864 |
filename = argv[optind]; |
865 |
|
866 |
/* Zero out regs */
|
867 |
memset(regs, 0, sizeof(struct target_pt_regs)); |
868 |
|
869 |
/* NOTE: we need to init the CPU at this stage to get
|
870 |
qemu_host_page_size */
|
871 |
env = cpu_init(); |
872 |
|
873 |
printf("Starting %s with qemu\n----------------\n", filename);
|
874 |
|
875 |
commpage_init(); |
876 |
|
877 |
if (mach_exec(filename, argv+optind, environ, regs) != 0) { |
878 |
printf("Error loading %s\n", filename);
|
879 |
_exit(1);
|
880 |
} |
881 |
|
882 |
syscall_init(); |
883 |
signal_init(); |
884 |
global_env = env; |
885 |
|
886 |
/* build Task State */
|
887 |
memset(ts, 0, sizeof(TaskState)); |
888 |
env->opaque = ts; |
889 |
ts->used = 1;
|
890 |
env->user_mode_only = 1;
|
891 |
|
892 |
#if defined(TARGET_I386)
|
893 |
cpu_x86_set_cpl(env, 3);
|
894 |
|
895 |
env->cr[0] = CR0_PG_MASK | CR0_WP_MASK | CR0_PE_MASK;
|
896 |
env->hflags |= HF_PE_MASK; |
897 |
|
898 |
if (env->cpuid_features & CPUID_SSE) {
|
899 |
env->cr[4] |= CR4_OSFXSR_MASK;
|
900 |
env->hflags |= HF_OSFXSR_MASK; |
901 |
} |
902 |
|
903 |
/* flags setup : we activate the IRQs by default as in user mode */
|
904 |
env->eflags |= IF_MASK; |
905 |
|
906 |
/* darwin register setup */
|
907 |
env->regs[R_EAX] = regs->eax; |
908 |
env->regs[R_EBX] = regs->ebx; |
909 |
env->regs[R_ECX] = regs->ecx; |
910 |
env->regs[R_EDX] = regs->edx; |
911 |
env->regs[R_ESI] = regs->esi; |
912 |
env->regs[R_EDI] = regs->edi; |
913 |
env->regs[R_EBP] = regs->ebp; |
914 |
env->regs[R_ESP] = regs->esp; |
915 |
env->eip = regs->eip; |
916 |
|
917 |
/* Darwin LDT setup */
|
918 |
/* 2 - User code segment
|
919 |
3 - User data segment
|
920 |
4 - User cthread */
|
921 |
bzero(ldt_table, LDT_TABLE_SIZE * sizeof(ldt_table[0])); |
922 |
env->ldt.base = (uint32_t) ldt_table; |
923 |
env->ldt.limit = sizeof(ldt_table) - 1; |
924 |
|
925 |
write_dt(ldt_table + 2, 0, 0xfffff, |
926 |
DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK | |
927 |
(3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT)); |
928 |
write_dt(ldt_table + 3, 0, 0xfffff, |
929 |
DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK | |
930 |
(3 << DESC_DPL_SHIFT) | (0x2 << DESC_TYPE_SHIFT)); |
931 |
write_dt(ldt_table + 4, 0, 0xfffff, |
932 |
DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK | |
933 |
(3 << DESC_DPL_SHIFT) | (0x2 << DESC_TYPE_SHIFT)); |
934 |
|
935 |
/* Darwin GDT setup.
|
936 |
* has changed a lot between old Darwin/x86 (pre-Mac Intel) and Mac OS X/x86,
|
937 |
now everything is done via int 0x81(mach) int 0x82 (thread) and sysenter/sysexit(unix) */
|
938 |
bzero(gdt_table, sizeof(gdt_table));
|
939 |
env->gdt.base = (uint32_t)gdt_table; |
940 |
env->gdt.limit = sizeof(gdt_table) - 1; |
941 |
|
942 |
/* Set up a back door to handle sysenter syscalls (unix) */
|
943 |
char * syscallbackdoor = malloc(64); |
944 |
page_set_flags((int)syscallbackdoor, (int)syscallbackdoor + 64, PROT_EXEC | PROT_READ | PAGE_VALID); |
945 |
|
946 |
int i = 0; |
947 |
syscallbackdoor[i++] = 0xcd;
|
948 |
syscallbackdoor[i++] = 0x90; /* int 0x90 */ |
949 |
syscallbackdoor[i++] = 0x0F;
|
950 |
syscallbackdoor[i++] = 0x35; /* sysexit */ |
951 |
|
952 |
/* Darwin sysenter/sysexit setup */
|
953 |
env->sysenter_cs = 0x1; //XXX |
954 |
env->sysenter_eip = (int)syscallbackdoor;
|
955 |
env->sysenter_esp = (int)malloc(64); |
956 |
|
957 |
/* Darwin TSS setup
|
958 |
This must match up with GDT[4] */
|
959 |
env->tr.base = (uint32_t) tss; |
960 |
env->tr.limit = sizeof(tss) - 1; |
961 |
env->tr.flags = DESC_P_MASK | (0x9 << DESC_TYPE_SHIFT);
|
962 |
stw(tss + 2, 0x10); // ss0 = 0x10 = GDT[2] = Kernel Data Segment |
963 |
|
964 |
/* Darwin interrupt setup */
|
965 |
bzero(idt_table, sizeof(idt_table));
|
966 |
env->idt.base = (uint32_t) idt_table; |
967 |
env->idt.limit = sizeof(idt_table) - 1; |
968 |
set_idt(0, 0); |
969 |
set_idt(1, 0); |
970 |
set_idt(2, 0); |
971 |
set_idt(3, 3); |
972 |
set_idt(4, 3); |
973 |
set_idt(5, 3); |
974 |
set_idt(6, 0); |
975 |
set_idt(7, 0); |
976 |
set_idt(8, 0); |
977 |
set_idt(9, 0); |
978 |
set_idt(10, 0); |
979 |
set_idt(11, 0); |
980 |
set_idt(12, 0); |
981 |
set_idt(13, 0); |
982 |
set_idt(14, 0); |
983 |
set_idt(15, 0); |
984 |
set_idt(16, 0); |
985 |
set_idt(17, 0); |
986 |
set_idt(18, 0); |
987 |
set_idt(19, 0); |
988 |
/* Syscalls are done via
|
989 |
int 0x80 (unix) (rarely used)
|
990 |
int 0x81 (mach)
|
991 |
int 0x82 (thread)
|
992 |
int 0x83 (diag) (not handled here)
|
993 |
sysenter/sysexit (unix) -> we redirect that to int 0x90 */
|
994 |
set_idt(0x79, 3); /* Commpage hack, here is our backdoor interrupt */ |
995 |
set_idt(0x80, 3); /* Unix Syscall */ |
996 |
set_idt(0x81, 3); /* Mach Syscalls */ |
997 |
set_idt(0x82, 3); /* thread Syscalls */ |
998 |
|
999 |
set_idt(0x90, 3); /* qemu-darwin-user's Unix syscalls backdoor */ |
1000 |
|
1001 |
|
1002 |
cpu_x86_load_seg(env, R_CS, __USER_CS); |
1003 |
cpu_x86_load_seg(env, R_DS, __USER_DS); |
1004 |
cpu_x86_load_seg(env, R_ES, __USER_DS); |
1005 |
cpu_x86_load_seg(env, R_SS, __USER_DS); |
1006 |
cpu_x86_load_seg(env, R_FS, __USER_DS); |
1007 |
cpu_x86_load_seg(env, R_GS, __USER_DS); |
1008 |
|
1009 |
#elif defined(TARGET_PPC)
|
1010 |
{ |
1011 |
int i;
|
1012 |
env->nip = regs->nip; |
1013 |
for(i = 0; i < 32; i++) { |
1014 |
env->gpr[i] = regs->gpr[i]; |
1015 |
} |
1016 |
} |
1017 |
#else
|
1018 |
#error unsupported target CPU
|
1019 |
#endif
|
1020 |
|
1021 |
if (use_gdbstub) {
|
1022 |
printf("Waiting for gdb Connection on port 1234...\n");
|
1023 |
gdbserver_start (1234);
|
1024 |
gdb_handlesig(env, 0);
|
1025 |
} |
1026 |
|
1027 |
cpu_loop(env); |
1028 |
/* never exits */
|
1029 |
return 0; |
1030 |
} |