/* * qemu user main * * Copyright (c) 2003 Fabrice Bellard * Copyright (c) 2006 Pierre d'Herbemont * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, see . */ #include #include #include #include #include #include #include #include #include "qemu.h" #define DEBUG_LOGFILE "/tmp/qemu.log" #ifdef __APPLE__ #include # define environ (*_NSGetEnviron()) #endif #include #include int singlestep; const char *interp_prefix = ""; asm(".zerofill __STD_PROG_ZONE, __STD_PROG_ZONE, __std_prog_zone, 0x0dfff000"); /* XXX: on x86 MAP_GROWSDOWN only works if ESP <= address + 32, so we allocate a bigger stack. Need a better solution, for example by remapping the process stack directly at the right place */ unsigned long stack_size = 512 * 1024; void qerror(const char *fmt, ...) { va_list ap; va_start(ap, fmt); vfprintf(stderr, fmt, ap); va_end(ap); fprintf(stderr, "\n"); exit(1); } void gemu_log(const char *fmt, ...) { va_list ap; va_start(ap, fmt); vfprintf(stderr, fmt, ap); va_end(ap); } int cpu_get_pic_interrupt(CPUState *env) { return -1; } #ifdef TARGET_PPC static inline uint64_t cpu_ppc_get_tb (CPUState *env) { /* TO FIX */ return 0; } uint64_t cpu_ppc_load_tbl (CPUState *env) { return cpu_ppc_get_tb(env); } uint32_t cpu_ppc_load_tbu (CPUState *env) { return cpu_ppc_get_tb(env) >> 32; } uint64_t cpu_ppc_load_atbl (CPUState *env) { return cpu_ppc_get_tb(env); } uint32_t cpu_ppc_load_atbu (CPUState *env) { return cpu_ppc_get_tb(env) >> 32; } uint32_t cpu_ppc601_load_rtcu (CPUState *env) { cpu_ppc_load_tbu(env); } uint32_t cpu_ppc601_load_rtcl (CPUState *env) { return cpu_ppc_load_tbl(env) & 0x3FFFFF80; } /* XXX: to be fixed */ int ppc_dcr_read (ppc_dcr_t *dcr_env, int dcrn, uint32_t *valp) { return -1; } int ppc_dcr_write (ppc_dcr_t *dcr_env, int dcrn, uint32_t val) { return -1; } #define EXCP_DUMP(env, fmt, ...) \ do { \ fprintf(stderr, fmt , ## __VA_ARGS__); \ cpu_dump_state(env, stderr, fprintf, 0); \ qemu_log(fmt, ## __VA_ARGS__); \ log_cpu_state(env, 0); \ } while (0) void cpu_loop(CPUPPCState *env) { int trapnr; uint32_t ret; target_siginfo_t info; for(;;) { trapnr = cpu_ppc_exec(env); switch(trapnr) { case POWERPC_EXCP_NONE: /* Just go on */ break; case POWERPC_EXCP_CRITICAL: /* Critical input */ cpu_abort(env, "Critical interrupt while in user mode. " "Aborting\n"); break; case POWERPC_EXCP_MCHECK: /* Machine check exception */ cpu_abort(env, "Machine check exception while in user mode. " "Aborting\n"); break; case POWERPC_EXCP_DSI: /* Data storage exception */ #ifndef DAR /* To deal with multiple qemu header version as host for the darwin-user code */ # define DAR SPR_DAR #endif EXCP_DUMP(env, "Invalid data memory access: 0x" TARGET_FMT_lx "\n", env->spr[SPR_DAR]); /* Handle this via the gdb */ gdb_handlesig (env, SIGSEGV); info.si_addr = (void*)env->nip; queue_signal(info.si_signo, &info); break; case POWERPC_EXCP_ISI: /* Instruction storage exception */ EXCP_DUMP(env, "Invalid instruction fetch: 0x\n" TARGET_FMT_lx "\n", env->spr[SPR_DAR]); /* Handle this via the gdb */ gdb_handlesig (env, SIGSEGV); info.si_addr = (void*)(env->nip - 4); queue_signal(info.si_signo, &info); break; case POWERPC_EXCP_EXTERNAL: /* External input */ cpu_abort(env, "External interrupt while in user mode. " "Aborting\n"); break; case POWERPC_EXCP_ALIGN: /* Alignment exception */ EXCP_DUMP(env, "Unaligned memory access\n"); info.si_errno = 0; info.si_code = BUS_ADRALN; info.si_addr = (void*)(env->nip - 4); queue_signal(info.si_signo, &info); break; case POWERPC_EXCP_PROGRAM: /* Program exception */ /* XXX: check this */ switch (env->error_code & ~0xF) { case POWERPC_EXCP_FP: EXCP_DUMP(env, "Floating point program exception\n"); /* Set FX */ info.si_signo = SIGFPE; info.si_errno = 0; switch (env->error_code & 0xF) { case POWERPC_EXCP_FP_OX: info.si_code = FPE_FLTOVF; break; case POWERPC_EXCP_FP_UX: info.si_code = FPE_FLTUND; break; case POWERPC_EXCP_FP_ZX: case POWERPC_EXCP_FP_VXZDZ: info.si_code = FPE_FLTDIV; break; case POWERPC_EXCP_FP_XX: info.si_code = FPE_FLTRES; break; case POWERPC_EXCP_FP_VXSOFT: info.si_code = FPE_FLTINV; break; case POWERPC_EXCP_FP_VXSNAN: case POWERPC_EXCP_FP_VXISI: case POWERPC_EXCP_FP_VXIDI: case POWERPC_EXCP_FP_VXIMZ: case POWERPC_EXCP_FP_VXVC: case POWERPC_EXCP_FP_VXSQRT: case POWERPC_EXCP_FP_VXCVI: info.si_code = FPE_FLTSUB; break; default: EXCP_DUMP(env, "Unknown floating point exception (%02x)\n", env->error_code); break; } break; case POWERPC_EXCP_INVAL: EXCP_DUMP(env, "Invalid instruction\n"); info.si_signo = SIGILL; info.si_errno = 0; switch (env->error_code & 0xF) { case POWERPC_EXCP_INVAL_INVAL: info.si_code = ILL_ILLOPC; break; case POWERPC_EXCP_INVAL_LSWX: info.si_code = ILL_ILLOPN; break; case POWERPC_EXCP_INVAL_SPR: info.si_code = ILL_PRVREG; break; case POWERPC_EXCP_INVAL_FP: info.si_code = ILL_COPROC; break; default: EXCP_DUMP(env, "Unknown invalid operation (%02x)\n", env->error_code & 0xF); info.si_code = ILL_ILLADR; break; } /* Handle this via the gdb */ gdb_handlesig (env, SIGSEGV); break; case POWERPC_EXCP_PRIV: EXCP_DUMP(env, "Privilege violation\n"); info.si_signo = SIGILL; info.si_errno = 0; switch (env->error_code & 0xF) { case POWERPC_EXCP_PRIV_OPC: info.si_code = ILL_PRVOPC; break; case POWERPC_EXCP_PRIV_REG: info.si_code = ILL_PRVREG; break; default: EXCP_DUMP(env, "Unknown privilege violation (%02x)\n", env->error_code & 0xF); info.si_code = ILL_PRVOPC; break; } break; case POWERPC_EXCP_TRAP: cpu_abort(env, "Tried to call a TRAP\n"); break; default: /* Should not happen ! */ cpu_abort(env, "Unknown program exception (%02x)\n", env->error_code); break; } info.si_addr = (void*)(env->nip - 4); queue_signal(info.si_signo, &info); break; case POWERPC_EXCP_FPU: /* Floating-point unavailable exception */ EXCP_DUMP(env, "No floating point allowed\n"); info.si_signo = SIGILL; info.si_errno = 0; info.si_code = ILL_COPROC; info.si_addr = (void*)(env->nip - 4); queue_signal(info.si_signo, &info); break; case POWERPC_EXCP_SYSCALL: /* System call exception */ cpu_abort(env, "Syscall exception while in user mode. " "Aborting\n"); break; case POWERPC_EXCP_APU: /* Auxiliary processor unavailable */ EXCP_DUMP(env, "No APU instruction allowed\n"); info.si_signo = SIGILL; info.si_errno = 0; info.si_code = ILL_COPROC; info.si_addr = (void*)(env->nip - 4); queue_signal(info.si_signo, &info); break; case POWERPC_EXCP_DECR: /* Decrementer exception */ cpu_abort(env, "Decrementer interrupt while in user mode. " "Aborting\n"); break; case POWERPC_EXCP_FIT: /* Fixed-interval timer interrupt */ cpu_abort(env, "Fix interval timer interrupt while in user mode. " "Aborting\n"); break; case POWERPC_EXCP_WDT: /* Watchdog timer interrupt */ cpu_abort(env, "Watchdog timer interrupt while in user mode. " "Aborting\n"); break; case POWERPC_EXCP_DTLB: /* Data TLB error */ cpu_abort(env, "Data TLB exception while in user mode. " "Aborting\n"); break; case POWERPC_EXCP_ITLB: /* Instruction TLB error */ cpu_abort(env, "Instruction TLB exception while in user mode. " "Aborting\n"); break; case POWERPC_EXCP_DEBUG: /* Debug interrupt */ gdb_handlesig (env, SIGTRAP); break; case POWERPC_EXCP_SPEU: /* SPE/embedded floating-point unavail. */ EXCP_DUMP(env, "No SPE/floating-point instruction allowed\n"); info.si_signo = SIGILL; info.si_errno = 0; info.si_code = ILL_COPROC; info.si_addr = (void*)(env->nip - 4); queue_signal(info.si_signo, &info); break; case POWERPC_EXCP_EFPDI: /* Embedded floating-point data IRQ */ cpu_abort(env, "Embedded floating-point data IRQ not handled\n"); break; case POWERPC_EXCP_EFPRI: /* Embedded floating-point round IRQ */ cpu_abort(env, "Embedded floating-point round IRQ not handled\n"); break; case POWERPC_EXCP_EPERFM: /* Embedded performance monitor IRQ */ cpu_abort(env, "Performance monitor exception not handled\n"); break; case POWERPC_EXCP_DOORI: /* Embedded doorbell interrupt */ cpu_abort(env, "Doorbell interrupt while in user mode. " "Aborting\n"); break; case POWERPC_EXCP_DOORCI: /* Embedded doorbell critical interrupt */ cpu_abort(env, "Doorbell critical interrupt while in user mode. " "Aborting\n"); break; case POWERPC_EXCP_RESET: /* System reset exception */ cpu_abort(env, "Reset interrupt while in user mode. " "Aborting\n"); break; case POWERPC_EXCP_DSEG: /* Data segment exception */ cpu_abort(env, "Data segment exception while in user mode. " "Aborting\n"); break; case POWERPC_EXCP_ISEG: /* Instruction segment exception */ cpu_abort(env, "Instruction segment exception " "while in user mode. Aborting\n"); break; case POWERPC_EXCP_HDECR: /* Hypervisor decrementer exception */ cpu_abort(env, "Hypervisor decrementer interrupt " "while in user mode. Aborting\n"); break; case POWERPC_EXCP_TRACE: /* Trace exception */ /* Nothing to do: * we use this exception to emulate step-by-step execution mode. */ break; case POWERPC_EXCP_HDSI: /* Hypervisor data storage exception */ cpu_abort(env, "Hypervisor data storage exception " "while in user mode. Aborting\n"); break; case POWERPC_EXCP_HISI: /* Hypervisor instruction storage excp */ cpu_abort(env, "Hypervisor instruction storage exception " "while in user mode. Aborting\n"); break; case POWERPC_EXCP_HDSEG: /* Hypervisor data segment exception */ cpu_abort(env, "Hypervisor data segment exception " "while in user mode. Aborting\n"); break; case POWERPC_EXCP_HISEG: /* Hypervisor instruction segment excp */ cpu_abort(env, "Hypervisor instruction segment exception " "while in user mode. Aborting\n"); break; case POWERPC_EXCP_VPU: /* Vector unavailable exception */ EXCP_DUMP(env, "No Altivec instructions allowed\n"); info.si_signo = SIGILL; info.si_errno = 0; info.si_code = ILL_COPROC; info.si_addr = (void*)(env->nip - 4); queue_signal(info.si_signo, &info); break; case POWERPC_EXCP_PIT: /* Programmable interval timer IRQ */ cpu_abort(env, "Programable interval timer interrupt " "while in user mode. Aborting\n"); break; case POWERPC_EXCP_IO: /* IO error exception */ cpu_abort(env, "IO error exception while in user mode. " "Aborting\n"); break; case POWERPC_EXCP_RUNM: /* Run mode exception */ cpu_abort(env, "Run mode exception while in user mode. " "Aborting\n"); break; case POWERPC_EXCP_EMUL: /* Emulation trap exception */ cpu_abort(env, "Emulation trap exception not handled\n"); break; case POWERPC_EXCP_IFTLB: /* Instruction fetch TLB error */ cpu_abort(env, "Instruction fetch TLB exception " "while in user-mode. Aborting"); break; case POWERPC_EXCP_DLTLB: /* Data load TLB miss */ cpu_abort(env, "Data load TLB exception while in user-mode. " "Aborting"); break; case POWERPC_EXCP_DSTLB: /* Data store TLB miss */ cpu_abort(env, "Data store TLB exception while in user-mode. " "Aborting"); break; case POWERPC_EXCP_FPA: /* Floating-point assist exception */ cpu_abort(env, "Floating-point assist exception not handled\n"); break; case POWERPC_EXCP_IABR: /* Instruction address breakpoint */ cpu_abort(env, "Instruction address breakpoint exception " "not handled\n"); break; case POWERPC_EXCP_SMI: /* System management interrupt */ cpu_abort(env, "System management interrupt while in user mode. " "Aborting\n"); break; case POWERPC_EXCP_THERM: /* Thermal interrupt */ cpu_abort(env, "Thermal interrupt interrupt while in user mode. " "Aborting\n"); break; case POWERPC_EXCP_PERFM: /* Embedded performance monitor IRQ */ cpu_abort(env, "Performance monitor exception not handled\n"); break; case POWERPC_EXCP_VPUA: /* Vector assist exception */ cpu_abort(env, "Vector assist exception not handled\n"); break; case POWERPC_EXCP_SOFTP: /* Soft patch exception */ cpu_abort(env, "Soft patch exception not handled\n"); break; case POWERPC_EXCP_MAINT: /* Maintenance exception */ cpu_abort(env, "Maintenance exception while in user mode. " "Aborting\n"); break; case POWERPC_EXCP_STOP: /* stop translation */ /* We did invalidate the instruction cache. Go on */ break; case POWERPC_EXCP_BRANCH: /* branch instruction: */ /* We just stopped because of a branch. Go on */ break; case POWERPC_EXCP_SYSCALL_USER: /* system call in user-mode emulation */ /* system call */ if(((int)env->gpr[0]) <= SYS_MAXSYSCALL && ((int)env->gpr[0])>0) ret = do_unix_syscall(env, env->gpr[0]/*, env->gpr[3], env->gpr[4], env->gpr[5], env->gpr[6], env->gpr[7], env->gpr[8], env->gpr[9], env->gpr[10]*/); else if(((int)env->gpr[0])<0) ret = do_mach_syscall(env, env->gpr[0], env->gpr[3], env->gpr[4], env->gpr[5], env->gpr[6], env->gpr[7], env->gpr[8], env->gpr[9], env->gpr[10]); else ret = do_thread_syscall(env, env->gpr[0], env->gpr[3], env->gpr[4], env->gpr[5], env->gpr[6], env->gpr[7], env->gpr[8], env->gpr[9], env->gpr[10]); /* Unix syscall error signaling */ if(((int)env->gpr[0]) <= SYS_MAXSYSCALL && ((int)env->gpr[0])>0) { if( (int)ret < 0 ) env->nip += 0; else env->nip += 4; } /* Return value */ env->gpr[3] = ret; break; case EXCP_INTERRUPT: /* just indicate that signals should be handled asap */ break; default: cpu_abort(env, "Unknown exception 0x%d. Aborting\n", trapnr); break; } process_pending_signals(env); } } #endif #ifdef TARGET_I386 /***********************************************************/ /* CPUX86 core interface */ uint64_t cpu_get_tsc(CPUX86State *env) { return cpu_get_real_ticks(); } void write_dt(void *ptr, unsigned long addr, unsigned long limit, int flags) { unsigned int e1, e2; e1 = (addr << 16) | (limit & 0xffff); e2 = ((addr >> 16) & 0xff) | (addr & 0xff000000) | (limit & 0x000f0000); e2 |= flags; stl((uint8_t *)ptr, e1); stl((uint8_t *)ptr + 4, e2); } static void set_gate(void *ptr, unsigned int type, unsigned int dpl, unsigned long addr, unsigned int sel) { unsigned int e1, e2; e1 = (addr & 0xffff) | (sel << 16); e2 = (addr & 0xffff0000) | 0x8000 | (dpl << 13) | (type << 8); stl((uint8_t *)ptr, e1); stl((uint8_t *)ptr + 4, e2); } #define GDT_TABLE_SIZE 14 #define LDT_TABLE_SIZE 15 #define IDT_TABLE_SIZE 256 #define TSS_SIZE 104 uint64_t gdt_table[GDT_TABLE_SIZE]; uint64_t ldt_table[LDT_TABLE_SIZE]; uint64_t idt_table[IDT_TABLE_SIZE]; uint32_t tss[TSS_SIZE]; /* only dpl matters as we do only user space emulation */ static void set_idt(int n, unsigned int dpl) { set_gate(idt_table + n, 0, dpl, 0, 0); } /* ABI convention: after a syscall if there was an error the CF flag is set */ static inline void set_error(CPUX86State *env, int ret) { if(ret<0) env->eflags = env->eflags | 0x1; else env->eflags &= ~0x1; env->regs[R_EAX] = ret; } void cpu_loop(CPUX86State *env) { int trapnr; int ret; uint8_t *pc; target_siginfo_t info; for(;;) { trapnr = cpu_x86_exec(env); uint32_t *params = (uint32_t *)env->regs[R_ESP]; switch(trapnr) { case 0x79: /* Our commpage hack back door exit is here */ do_commpage(env, env->eip, *(params + 1), *(params + 2), *(params + 3), *(params + 4), *(params + 5), *(params + 6), *(params + 7), *(params + 8)); break; case 0x81: /* mach syscall */ { ret = do_mach_syscall(env, env->regs[R_EAX], *(params + 1), *(params + 2), *(params + 3), *(params + 4), *(params + 5), *(params + 6), *(params + 7), *(params + 8)); set_error(env, ret); break; } case 0x90: /* unix backdoor */ { /* after sysenter, stack is in R_ECX, new eip in R_EDX (sysexit will flip them back)*/ int saved_stack = env->regs[R_ESP]; env->regs[R_ESP] = env->regs[R_ECX]; ret = do_unix_syscall(env, env->regs[R_EAX]); env->regs[R_ECX] = env->regs[R_ESP]; env->regs[R_ESP] = saved_stack; set_error(env, ret); break; } case 0x80: /* unix syscall */ { ret = do_unix_syscall(env, env->regs[R_EAX]/*, *(params + 1), *(params + 2), *(params + 3), *(params + 4), *(params + 5), *(params + 6), *(params + 7), *(params + 8)*/); set_error(env, ret); break; } case 0x82: /* thread syscall */ { ret = do_thread_syscall(env, env->regs[R_EAX], *(params + 1), *(params + 2), *(params + 3), *(params + 4), *(params + 5), *(params + 6), *(params + 7), *(params + 8)); set_error(env, ret); break; } case EXCP0B_NOSEG: case EXCP0C_STACK: info.si_signo = SIGBUS; info.si_errno = 0; info.si_code = BUS_NOOP; info.si_addr = 0; gdb_handlesig (env, SIGBUS); queue_signal(info.si_signo, &info); break; case EXCP0D_GPF: info.si_signo = SIGSEGV; info.si_errno = 0; info.si_code = SEGV_NOOP; info.si_addr = 0; gdb_handlesig (env, SIGSEGV); queue_signal(info.si_signo, &info); break; case EXCP0E_PAGE: info.si_signo = SIGSEGV; info.si_errno = 0; if (!(env->error_code & 1)) info.si_code = SEGV_MAPERR; else info.si_code = SEGV_ACCERR; info.si_addr = (void*)env->cr[2]; gdb_handlesig (env, SIGSEGV); queue_signal(info.si_signo, &info); break; case EXCP00_DIVZ: /* division by zero */ info.si_signo = SIGFPE; info.si_errno = 0; info.si_code = FPE_INTDIV; info.si_addr = (void*)env->eip; gdb_handlesig (env, SIGFPE); queue_signal(info.si_signo, &info); break; case EXCP01_SSTP: case EXCP03_INT3: info.si_signo = SIGTRAP; info.si_errno = 0; info.si_code = TRAP_BRKPT; info.si_addr = (void*)env->eip; gdb_handlesig (env, SIGTRAP); queue_signal(info.si_signo, &info); break; case EXCP04_INTO: case EXCP05_BOUND: info.si_signo = SIGSEGV; info.si_errno = 0; info.si_code = SEGV_NOOP; info.si_addr = 0; gdb_handlesig (env, SIGSEGV); queue_signal(info.si_signo, &info); break; case EXCP06_ILLOP: info.si_signo = SIGILL; info.si_errno = 0; info.si_code = ILL_ILLOPN; info.si_addr = (void*)env->eip; gdb_handlesig (env, SIGILL); queue_signal(info.si_signo, &info); break; case EXCP_INTERRUPT: /* just indicate that signals should be handled asap */ break; case EXCP_DEBUG: { int sig; sig = gdb_handlesig (env, SIGTRAP); if (sig) { info.si_signo = sig; info.si_errno = 0; info.si_code = TRAP_BRKPT; queue_signal(info.si_signo, &info); } } break; default: pc = (void*)(env->segs[R_CS].base + env->eip); fprintf(stderr, "qemu: 0x%08lx: unhandled CPU exception 0x%x - aborting\n", (long)pc, trapnr); abort(); } process_pending_signals(env); } } #endif static void usage(void) { printf("qemu-" TARGET_ARCH " version " QEMU_VERSION ", Copyright (c) 2003-2004 Fabrice Bellard\n" "usage: qemu-" TARGET_ARCH " [-h] [-d opts] [-L path] [-s size] program [arguments...]\n" "Darwin CPU emulator (compiled for %s emulation)\n" "\n" "-h print this help\n" "-L path set the %s library path (default='%s')\n" "-s size set the stack size in bytes (default=%ld)\n" "\n" "debug options:\n" "-d options activate log (logfile='%s')\n" "-g wait for gdb on port 1234\n" "-p pagesize set the host page size to 'pagesize'\n", "-singlestep always run in singlestep mode\n" TARGET_ARCH, TARGET_ARCH, interp_prefix, stack_size, DEBUG_LOGFILE); exit(1); } /* XXX: currently only used for async signals (see signal.c) */ CPUState *global_env; /* used only if single thread */ CPUState *cpu_single_env = NULL; /* used to free thread contexts */ TaskState *first_task_state; int main(int argc, char **argv) { const char *filename; const char *log_file = DEBUG_LOGFILE; const char *log_mask = NULL; struct target_pt_regs regs1, *regs = ®s1; TaskState ts1, *ts = &ts1; CPUState *env; int optind; short use_gdbstub = 0; const char *r; const char *cpu_model; if (argc <= 1) usage(); optind = 1; for(;;) { if (optind >= argc) break; r = argv[optind]; if (r[0] != '-') break; optind++; r++; if (!strcmp(r, "-")) { break; } else if (!strcmp(r, "d")) { if (optind >= argc) { break; } log_mask = argv[optind++]; } else if (!strcmp(r, "D")) { if (optind >= argc) { break; } log_file = argv[optind++]; } else if (!strcmp(r, "s")) { r = argv[optind++]; stack_size = strtol(r, (char **)&r, 0); if (stack_size <= 0) usage(); if (*r == 'M') stack_size *= 1024 * 1024; else if (*r == 'k' || *r == 'K') stack_size *= 1024; } else if (!strcmp(r, "L")) { interp_prefix = argv[optind++]; } else if (!strcmp(r, "p")) { qemu_host_page_size = atoi(argv[optind++]); if (qemu_host_page_size == 0 || (qemu_host_page_size & (qemu_host_page_size - 1)) != 0) { fprintf(stderr, "page size must be a power of two\n"); exit(1); } } else if (!strcmp(r, "g")) { use_gdbstub = 1; } else if (!strcmp(r, "cpu")) { cpu_model = argv[optind++]; if (strcmp(cpu_model, "?") == 0) { /* XXX: implement xxx_cpu_list for targets that still miss it */ #if defined(cpu_list) cpu_list(stdout, &fprintf); #endif exit(1); } } else if (!strcmp(r, "singlestep")) { singlestep = 1; } else { usage(); } } /* init debug */ cpu_set_log_filename(log_file); if (log_mask) { int mask; CPULogItem *item; mask = cpu_str_to_log_mask(log_mask); if (!mask) { printf("Log items (comma separated):\n"); for (item = cpu_log_items; item->mask != 0; item++) { printf("%-10s %s\n", item->name, item->help); } exit(1); } cpu_set_log(mask); } if (optind >= argc) { usage(); } filename = argv[optind]; /* Zero out regs */ memset(regs, 0, sizeof(struct target_pt_regs)); if (cpu_model == NULL) { #if defined(TARGET_I386) #ifdef TARGET_X86_64 cpu_model = "qemu64"; #else cpu_model = "qemu32"; #endif #elif defined(TARGET_PPC) #ifdef TARGET_PPC64 cpu_model = "970"; #else cpu_model = "750"; #endif #else #error unsupported CPU #endif } cpu_exec_init_all(0); /* NOTE: we need to init the CPU at this stage to get qemu_host_page_size */ env = cpu_init(cpu_model); cpu_reset(env); printf("Starting %s with qemu\n----------------\n", filename); commpage_init(); if (mach_exec(filename, argv+optind, environ, regs) != 0) { printf("Error loading %s\n", filename); _exit(1); } syscall_init(); signal_init(); global_env = env; /* build Task State */ memset(ts, 0, sizeof(TaskState)); env->opaque = ts; ts->used = 1; #if defined(TARGET_I386) cpu_x86_set_cpl(env, 3); env->cr[0] = CR0_PG_MASK | CR0_WP_MASK | CR0_PE_MASK; env->hflags |= HF_PE_MASK; if (env->cpuid_features & CPUID_SSE) { env->cr[4] |= CR4_OSFXSR_MASK; env->hflags |= HF_OSFXSR_MASK; } /* flags setup : we activate the IRQs by default as in user mode */ env->eflags |= IF_MASK; /* darwin register setup */ env->regs[R_EAX] = regs->eax; env->regs[R_EBX] = regs->ebx; env->regs[R_ECX] = regs->ecx; env->regs[R_EDX] = regs->edx; env->regs[R_ESI] = regs->esi; env->regs[R_EDI] = regs->edi; env->regs[R_EBP] = regs->ebp; env->regs[R_ESP] = regs->esp; env->eip = regs->eip; /* Darwin LDT setup */ /* 2 - User code segment 3 - User data segment 4 - User cthread */ bzero(ldt_table, LDT_TABLE_SIZE * sizeof(ldt_table[0])); env->ldt.base = (uint32_t) ldt_table; env->ldt.limit = sizeof(ldt_table) - 1; write_dt(ldt_table + 2, 0, 0xfffff, DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK | (3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT)); write_dt(ldt_table + 3, 0, 0xfffff, DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK | (3 << DESC_DPL_SHIFT) | (0x2 << DESC_TYPE_SHIFT)); write_dt(ldt_table + 4, 0, 0xfffff, DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK | (3 << DESC_DPL_SHIFT) | (0x2 << DESC_TYPE_SHIFT)); /* Darwin GDT setup. * has changed a lot between old Darwin/x86 (pre-Mac Intel) and Mac OS X/x86, now everything is done via int 0x81(mach) int 0x82 (thread) and sysenter/sysexit(unix) */ bzero(gdt_table, sizeof(gdt_table)); env->gdt.base = (uint32_t)gdt_table; env->gdt.limit = sizeof(gdt_table) - 1; /* Set up a back door to handle sysenter syscalls (unix) */ char * syscallbackdoor = malloc(64); page_set_flags((int)syscallbackdoor, (int)syscallbackdoor + 64, PROT_EXEC | PROT_READ | PAGE_VALID); int i = 0; syscallbackdoor[i++] = 0xcd; syscallbackdoor[i++] = 0x90; /* int 0x90 */ syscallbackdoor[i++] = 0x0F; syscallbackdoor[i++] = 0x35; /* sysexit */ /* Darwin sysenter/sysexit setup */ env->sysenter_cs = 0x1; //XXX env->sysenter_eip = (int)syscallbackdoor; env->sysenter_esp = (int)malloc(64); /* Darwin TSS setup This must match up with GDT[4] */ env->tr.base = (uint32_t) tss; env->tr.limit = sizeof(tss) - 1; env->tr.flags = DESC_P_MASK | (0x9 << DESC_TYPE_SHIFT); stw(tss + 2, 0x10); // ss0 = 0x10 = GDT[2] = Kernel Data Segment /* Darwin interrupt setup */ bzero(idt_table, sizeof(idt_table)); env->idt.base = (uint32_t) idt_table; env->idt.limit = sizeof(idt_table) - 1; set_idt(0, 0); set_idt(1, 0); set_idt(2, 0); set_idt(3, 3); set_idt(4, 3); set_idt(5, 3); set_idt(6, 0); set_idt(7, 0); set_idt(8, 0); set_idt(9, 0); set_idt(10, 0); set_idt(11, 0); set_idt(12, 0); set_idt(13, 0); set_idt(14, 0); set_idt(15, 0); set_idt(16, 0); set_idt(17, 0); set_idt(18, 0); set_idt(19, 0); /* Syscalls are done via int 0x80 (unix) (rarely used) int 0x81 (mach) int 0x82 (thread) int 0x83 (diag) (not handled here) sysenter/sysexit (unix) -> we redirect that to int 0x90 */ set_idt(0x79, 3); /* Commpage hack, here is our backdoor interrupt */ set_idt(0x80, 3); /* Unix Syscall */ set_idt(0x81, 3); /* Mach Syscalls */ set_idt(0x82, 3); /* thread Syscalls */ set_idt(0x90, 3); /* qemu-darwin-user's Unix syscalls backdoor */ cpu_x86_load_seg(env, R_CS, __USER_CS); cpu_x86_load_seg(env, R_DS, __USER_DS); cpu_x86_load_seg(env, R_ES, __USER_DS); cpu_x86_load_seg(env, R_SS, __USER_DS); cpu_x86_load_seg(env, R_FS, __USER_DS); cpu_x86_load_seg(env, R_GS, __USER_DS); #elif defined(TARGET_PPC) { int i; #if defined(TARGET_PPC64) #if defined(TARGET_ABI32) env->msr &= ~((target_ulong)1 << MSR_SF); #else env->msr |= (target_ulong)1 << MSR_SF; #endif #endif env->nip = regs->nip; for(i = 0; i < 32; i++) { env->gpr[i] = regs->gpr[i]; } } #else #error unsupported target CPU #endif if (use_gdbstub) { printf("Waiting for gdb Connection on port 1234...\n"); gdbserver_start (1234); gdb_handlesig(env, 0); } cpu_loop(env); /* never exits */ return 0; }