From 831b78254cfa752d5e6542542a663468e650bcb3 Mon Sep 17 00:00:00 2001 From: ths Date: Thu, 18 Jan 2007 20:06:33 +0000 Subject: Darwin userspace emulation, by Pierre d'Herbemont. git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2332 c046a42c-6fe2-441c-8c8c-71466251a162 --- darwin-user/main.c | 922 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 922 insertions(+) create mode 100644 darwin-user/main.c (limited to 'darwin-user/main.c') diff --git a/darwin-user/main.c b/darwin-user/main.c new file mode 100644 index 0000000..259aab3 --- /dev/null +++ b/darwin-user/main.c @@ -0,0 +1,922 @@ +/* + * 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, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ +#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 + +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); +} + +void cpu_outb(CPUState *env, int addr, int val) +{ + fprintf(stderr, "outb: port=0x%04x, data=%02x\n", addr, val); +} + +void cpu_outw(CPUState *env, int addr, int val) +{ + fprintf(stderr, "outw: port=0x%04x, data=%04x\n", addr, val); +} + +void cpu_outl(CPUState *env, int addr, int val) +{ + fprintf(stderr, "outl: port=0x%04x, data=%08x\n", addr, val); +} + +int cpu_inb(CPUState *env, int addr) +{ + fprintf(stderr, "inb: port=0x%04x\n", addr); + return 0; +} + +int cpu_inw(CPUState *env, int addr) +{ + fprintf(stderr, "inw: port=0x%04x\n", addr); + return 0; +} + +int cpu_inl(CPUState *env, int addr) +{ + fprintf(stderr, "inl: port=0x%04x\n", addr); + return 0; +} + +int cpu_get_pic_interrupt(CPUState *env) +{ + return -1; +} +#ifdef TARGET_PPC + +static inline uint64_t cpu_ppc_get_tb (CPUState *env) +{ + /* TO FIX */ + return 0; +} + +uint32_t cpu_ppc_load_tbl (CPUState *env) +{ + return cpu_ppc_get_tb(env) & 0xFFFFFFFF; +} + +uint32_t cpu_ppc_load_tbu (CPUState *env) +{ + return cpu_ppc_get_tb(env) >> 32; +} + +static void cpu_ppc_store_tb (CPUState *env, uint64_t value) +{ + /* TO FIX */ +} + +void cpu_ppc_store_tbu (CPUState *env, uint32_t value) +{ + cpu_ppc_store_tb(env, ((uint64_t)value << 32) | cpu_ppc_load_tbl(env)); +} + +void cpu_ppc_store_tbl (CPUState *env, uint32_t value) +{ + cpu_ppc_store_tb(env, ((uint64_t)cpu_ppc_load_tbl(env) << 32) | value); +} + +uint32_t cpu_ppc_load_decr (CPUState *env) +{ + /* TO FIX */ + return -1; +} + +void cpu_ppc_store_decr (CPUState *env, uint32_t value) +{ + /* TO FIX */ +} + +void cpu_loop(CPUPPCState *env) +{ + int trapnr; + uint32_t ret; + target_siginfo_t info; + + for(;;) { + trapnr = cpu_ppc_exec(env); + if (trapnr != EXCP_SYSCALL_USER && trapnr != EXCP_BRANCH && + trapnr != EXCP_TRACE) { + if (loglevel > 0) { + cpu_dump_state(env, logfile, fprintf, 0); + } + } + switch(trapnr) { + case EXCP_NONE: + break; + case EXCP_SYSCALL_USER: + /* 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_RESET: + /* Should not happen ! */ + fprintf(stderr, "RESET asked... Stop emulation\n"); + if (loglevel) + fprintf(logfile, "RESET asked... Stop emulation\n"); + abort(); + case EXCP_MACHINE_CHECK: + fprintf(stderr, "Machine check exeption... Stop emulation\n"); + if (loglevel) + fprintf(logfile, "RESET asked... Stop emulation\n"); + info.si_signo = SIGBUS; + info.si_errno = 0; + info.si_code = BUS_OBJERR; + info.si_addr = (void*)(env->nip - 4); + queue_signal(info.si_signo, &info); + case EXCP_DSI: +#ifndef DAR +/* To deal with multiple qemu header version as host for the darwin-user code */ +# define DAR SPR_DAR +#endif + fprintf(stderr, "Invalid data memory access: 0x%08x\n", env->spr[DAR]); + if (loglevel) { + fprintf(logfile, "Invalid data memory access: 0x%08x\n", + env->spr[DAR]); + } + /* Handle this via the gdb */ + gdb_handlesig (env, SIGSEGV); + + info.si_addr = (void*)env->nip; + queue_signal(info.si_signo, &info); + break; + case EXCP_ISI: + fprintf(stderr, "Invalid instruction fetch\n"); + if (loglevel) + fprintf(logfile, "Invalid instruction fetch\n"); + /* Handle this via the gdb */ + gdb_handlesig (env, SIGSEGV); + + info.si_addr = (void*)(env->nip - 4); + queue_signal(info.si_signo, &info); + break; + case EXCP_EXTERNAL: + /* Should not happen ! */ + fprintf(stderr, "External interruption... Stop emulation\n"); + if (loglevel) + fprintf(logfile, "External interruption... Stop emulation\n"); + abort(); + case EXCP_ALIGN: + fprintf(stderr, "Invalid unaligned memory access\n"); + if (loglevel) + fprintf(logfile, "Invalid unaligned memory access\n"); + info.si_signo = SIGBUS; + info.si_errno = 0; + info.si_code = BUS_ADRALN; + info.si_addr = (void*)(env->nip - 4); + queue_signal(info.si_signo, &info); + break; + case EXCP_PROGRAM: + switch (env->error_code & ~0xF) { + case EXCP_FP: + fprintf(stderr, "Program exception\n"); + if (loglevel) + fprintf(logfile, "Program exception\n"); + /* Set FX */ + env->fpscr[7] |= 0x8; + /* Finally, update FEX */ + if ((((env->fpscr[7] & 0x3) << 3) | (env->fpscr[6] >> 1)) & + ((env->fpscr[1] << 1) | (env->fpscr[0] >> 3))) + env->fpscr[7] |= 0x4; + info.si_signo = SIGFPE; + info.si_errno = 0; + switch (env->error_code & 0xF) { + case EXCP_FP_OX: + info.si_code = FPE_FLTOVF; + break; + case EXCP_FP_UX: + info.si_code = FPE_FLTUND; + break; + case EXCP_FP_ZX: + case EXCP_FP_VXZDZ: + info.si_code = FPE_FLTDIV; + break; + case EXCP_FP_XX: + info.si_code = FPE_FLTRES; + break; + case EXCP_FP_VXSOFT: + info.si_code = FPE_FLTINV; + break; + case EXCP_FP_VXNAN: + case EXCP_FP_VXISI: + case EXCP_FP_VXIDI: + case EXCP_FP_VXIMZ: + case EXCP_FP_VXVC: + case EXCP_FP_VXSQRT: + case EXCP_FP_VXCVI: + info.si_code = FPE_FLTSUB; + break; + default: + fprintf(stderr, "Unknown floating point exception " + "(%02x)\n", env->error_code); + if (loglevel) { + fprintf(logfile, "Unknown floating point exception " + "(%02x)\n", env->error_code & 0xF); + } + } + break; + case EXCP_INVAL: + fprintf(stderr, "Invalid instruction\n"); + if (loglevel) + fprintf(logfile, "Invalid instruction\n"); + info.si_signo = SIGILL; + info.si_errno = 0; + switch (env->error_code & 0xF) { + case EXCP_INVAL_INVAL: + info.si_code = ILL_ILLOPC; + break; + case EXCP_INVAL_LSWX: + info.si_code = ILL_ILLOPN; + break; + case EXCP_INVAL_SPR: + info.si_code = ILL_PRVREG; + break; + case EXCP_INVAL_FP: + info.si_code = ILL_COPROC; + break; + default: + fprintf(stderr, "Unknown invalid operation (%02x)\n", + env->error_code & 0xF); + if (loglevel) { + fprintf(logfile, "Unknown invalid operation (%02x)\n", + env->error_code & 0xF); + } + info.si_code = ILL_ILLADR; + break; + } + /* Handle this via the gdb */ + gdb_handlesig (env, SIGSEGV); + break; + case EXCP_PRIV: + fprintf(stderr, "Privilege violation\n"); + if (loglevel) + fprintf(logfile, "Privilege violation\n"); + info.si_signo = SIGILL; + info.si_errno = 0; + switch (env->error_code & 0xF) { + case EXCP_PRIV_OPC: + info.si_code = ILL_PRVOPC; + break; + case EXCP_PRIV_REG: + info.si_code = ILL_PRVREG; + break; + default: + fprintf(stderr, "Unknown privilege violation (%02x)\n", + env->error_code & 0xF); + info.si_code = ILL_PRVOPC; + break; + } + break; + case EXCP_TRAP: + fprintf(stderr, "Tried to call a TRAP\n"); + if (loglevel) + fprintf(logfile, "Tried to call a TRAP\n"); + abort(); + default: + /* Should not happen ! */ + fprintf(stderr, "Unknown program exception (%02x)\n", + env->error_code); + if (loglevel) { + fprintf(logfile, "Unknwon program exception (%02x)\n", + env->error_code); + } + abort(); + } + info.si_addr = (void*)(env->nip - 4); + queue_signal(info.si_signo, &info); + break; + case EXCP_NO_FP: + fprintf(stderr, "No floating point allowed\n"); + if (loglevel) + fprintf(logfile, "No floating point allowed\n"); + info.si_signo = 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 EXCP_DECR: + /* Should not happen ! */ + fprintf(stderr, "Decrementer exception\n"); + if (loglevel) + fprintf(logfile, "Decrementer exception\n"); + abort(); + case EXCP_TRACE: + /* Pass to gdb: we use this to trace execution */ + gdb_handlesig (env, SIGTRAP); + break; + case EXCP_FP_ASSIST: + /* Should not happen ! */ + fprintf(stderr, "Floating point assist exception\n"); + if (loglevel) + fprintf(logfile, "Floating point assist exception\n"); + abort(); + case EXCP_MTMSR: + /* We reloaded the msr, just go on */ + if (msr_pr == 0) { + fprintf(stderr, "Tried to go into supervisor mode !\n"); + if (loglevel) + fprintf(logfile, "Tried to go into supervisor mode !\n"); + abort(); + } + break; + case EXCP_BRANCH: + /* We stopped because of a jump... */ + break; + case EXCP_INTERRUPT: + /* Don't know why this should ever happen... */ + fprintf(stderr, "EXCP_INTERRUPT\n"); + break; + case EXCP_DEBUG: + gdb_handlesig (env, SIGTRAP); + break; + default: + fprintf(stderr, "qemu: unhandled CPU exception 0x%x - aborting\n", + trapnr); + if (loglevel) { + fprintf(logfile, "qemu: unhandled CPU exception 0x%02x - " + "0x%02x - aborting\n", trapnr, env->error_code); + } + abort(); + } + process_pending_signals(env); + } +} +#endif + + +#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 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 + +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 elf interpreter prefix (default=%s)\n" + "-s size set the stack size in bytes (default=%ld)\n" + "\n" + "debug options:\n" +#ifdef USE_CODE_COPY + "-no-code-copy disable code copy acceleration\n" +#endif + "-d options activate log (logfile=%s)\n" + "-g wait for gdb on port 1234\n" + "-p pagesize set the host page size to 'pagesize'\n", + 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; + struct target_pt_regs regs1, *regs = ®s1; + TaskState ts1, *ts = &ts1; + CPUState *env; + int optind; + short use_gdbstub = 0; + const char *r; + + if (argc <= 1) + usage(); + + /* init debug */ + cpu_set_log_filename(DEBUG_LOGFILE); + + optind = 1; + for(;;) { + if (optind >= argc) + break; + r = argv[optind]; + if (r[0] != '-') + break; + optind++; + r++; + if (!strcmp(r, "-")) { + break; + } else if (!strcmp(r, "d")) { + int mask; + CPULogItem *item; + + if (optind >= argc) + break; + + r = argv[optind++]; + mask = cpu_str_to_log_mask(r); + if (!mask) { + printf("Log items (comma separated):\n"); + for(item = cpu_log_items; item->mask != 0; item++) { + printf("%-10s %s\n", item->name, item->help); + } + exit(1); + } + cpu_set_log(mask); + } else if (!strcmp(r, "s")) { + r = argv[optind++]; + 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 +#ifdef USE_CODE_COPY + if (!strcmp(r, "no-code-copy")) { + code_copy_enabled = 0; + } else +#endif + { + usage(); + } + } + if (optind >= argc) + usage(); + filename = argv[optind]; + + /* Zero out regs */ + memset(regs, 0, sizeof(struct target_pt_regs)); + +#if 0 + /* Scan interp_prefix dir for replacement files. */ + init_paths(interp_prefix); +#endif + + /* NOTE: we need to init the CPU at this stage to get + qemu_host_page_size */ + env = cpu_init(); + + 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; + env->user_mode_only = 1; + +#if defined(TARGET_I386) + cpu_x86_set_cpl(env, 3); + + env->cr[0] = CR0_PG_MASK | CR0_WP_MASK | CR0_PE_MASK; + env->hflags |= HF_PE_MASK; + + 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); /* Unix Syscall 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; + 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; +} -- cgit v1.1