/*
- * gemu main
+ * qemu main
*
* Copyright (c) 2003 Fabrice Bellard
*
#include <errno.h>
#include <unistd.h>
-#include "gemu.h"
+#include "qemu.h"
-#include "cpu-i386.h"
-
-#define DEBUG_LOGFILE "/tmp/gemu.log"
+#define DEBUG_LOGFILE "/tmp/qemu.log"
FILE *logfile = NULL;
int loglevel;
+static const char *interp_prefix = CONFIG_QEMU_PREFIX;
+
+#ifdef __i386__
+/* Force usage of an ELF interpreter even if it is an ELF shared
+ object ! */
+const char interp[] __attribute__((section(".interp"))) = "/lib/ld-linux.so.2";
+#endif
+
+/* for recent libc, we add these dummies symbol which are not declared
+ when generating a linked object (bug in ld ?) */
+#if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 3)
+long __init_array_start[0];
+long __init_array_end[0];
+long __fini_array_start[0];
+long __fini_array_end[0];
+#endif
-unsigned long x86_stack_size;
-unsigned long stktop;
+/* XXX: on x86 MAP_GROWSDOWN only works if ESP <= address + 32, so
+ we allocate a bigger stack. Need a better solution, for example
+ by remapping the process stack directly at the right place */
+unsigned long x86_stack_size = 512 * 1024;
void gemu_log(const char *fmt, ...)
{
va_end(ap);
}
+#ifdef TARGET_I386
/***********************************************************/
/* CPUX86 core interface */
-void cpu_x86_outb(int addr, int val)
+void cpu_x86_outb(CPUX86State *env, int addr, int val)
{
fprintf(stderr, "outb: port=0x%04x, data=%02x\n", addr, val);
}
-void cpu_x86_outw(int addr, int val)
+void cpu_x86_outw(CPUX86State *env, int addr, int val)
{
fprintf(stderr, "outw: port=0x%04x, data=%04x\n", addr, val);
}
-void cpu_x86_outl(int addr, int val)
+void cpu_x86_outl(CPUX86State *env, int addr, int val)
{
fprintf(stderr, "outl: port=0x%04x, data=%08x\n", addr, val);
}
-int cpu_x86_inb(int addr)
+int cpu_x86_inb(CPUX86State *env, int addr)
{
fprintf(stderr, "inb: port=0x%04x\n", addr);
return 0;
}
-int cpu_x86_inw(int addr)
+int cpu_x86_inw(CPUX86State *env, int addr)
{
fprintf(stderr, "inw: port=0x%04x\n", addr);
return 0;
}
-int cpu_x86_inl(int addr)
+int cpu_x86_inl(CPUX86State *env, int addr)
{
fprintf(stderr, "inl: port=0x%04x\n", addr);
return 0;
}
-/* default linux values for the selectors */
-#define __USER_CS (0x23)
-#define __USER_DS (0x2B)
+int cpu_x86_get_pic_interrupt(CPUX86State *env)
+{
+ return -1;
+}
-void write_dt(void *ptr, unsigned long addr, unsigned long limit,
- int seg32_bit)
+static void write_dt(void *ptr, unsigned long addr, unsigned long limit,
+ int flags)
{
- unsigned int e1, e2, limit_in_pages;
- limit_in_pages = 0;
- if (limit > 0xffff) {
- limit = limit >> 12;
- limit_in_pages = 1;
- }
+ unsigned int e1, e2;
e1 = (addr << 16) | (limit & 0xffff);
e2 = ((addr >> 16) & 0xff) | (addr & 0xff000000) | (limit & 0x000f0000);
- e2 |= limit_in_pages << 23; /* byte granularity */
- e2 |= seg32_bit << 22; /* 32 bit segment */
+ e2 |= flags;
+ stl((uint8_t *)ptr, e1);
+ stl((uint8_t *)ptr + 4, e2);
+}
+
+static void set_gate(void *ptr, unsigned int type, unsigned int dpl,
+ unsigned long addr, unsigned int sel)
+{
+ unsigned int e1, e2;
+ e1 = (addr & 0xffff) | (sel << 16);
+ e2 = (addr & 0xffff0000) | 0x8000 | (dpl << 13) | (type << 8);
stl((uint8_t *)ptr, e1);
stl((uint8_t *)ptr + 4, e2);
}
uint64_t gdt_table[6];
+uint64_t idt_table[256];
+
+/* only dpl matters as we do only user space emulation */
+static void set_idt(int n, unsigned int dpl)
+{
+ set_gate(idt_table + n, 0, dpl, 0, 0);
+}
+
+void cpu_loop(CPUX86State *env)
+{
+ int trapnr;
+ uint8_t *pc;
+ target_siginfo_t info;
+
+ for(;;) {
+ trapnr = cpu_x86_exec(env);
+ switch(trapnr) {
+ case 0x80:
+ /* linux syscall */
+ env->regs[R_EAX] = do_syscall(env,
+ env->regs[R_EAX],
+ env->regs[R_EBX],
+ env->regs[R_ECX],
+ env->regs[R_EDX],
+ env->regs[R_ESI],
+ env->regs[R_EDI],
+ env->regs[R_EBP]);
+ break;
+ case EXCP0B_NOSEG:
+ case EXCP0C_STACK:
+ info.si_signo = SIGBUS;
+ info.si_errno = 0;
+ info.si_code = TARGET_SI_KERNEL;
+ info._sifields._sigfault._addr = 0;
+ queue_signal(info.si_signo, &info);
+ break;
+ case EXCP0D_GPF:
+ if (env->eflags & VM_MASK) {
+ handle_vm86_fault(env);
+ } else {
+ info.si_signo = SIGSEGV;
+ info.si_errno = 0;
+ info.si_code = TARGET_SI_KERNEL;
+ info._sifields._sigfault._addr = 0;
+ queue_signal(info.si_signo, &info);
+ }
+ break;
+ case EXCP0E_PAGE:
+ info.si_signo = SIGSEGV;
+ info.si_errno = 0;
+ if (!(env->error_code & 1))
+ info.si_code = TARGET_SEGV_MAPERR;
+ else
+ info.si_code = TARGET_SEGV_ACCERR;
+ info._sifields._sigfault._addr = env->cr[2];
+ queue_signal(info.si_signo, &info);
+ break;
+ case EXCP00_DIVZ:
+ if (env->eflags & VM_MASK) {
+ handle_vm86_trap(env, trapnr);
+ } else {
+ /* division by zero */
+ info.si_signo = SIGFPE;
+ info.si_errno = 0;
+ info.si_code = TARGET_FPE_INTDIV;
+ info._sifields._sigfault._addr = env->eip;
+ queue_signal(info.si_signo, &info);
+ }
+ break;
+ case EXCP01_SSTP:
+ case EXCP03_INT3:
+ if (env->eflags & VM_MASK) {
+ handle_vm86_trap(env, trapnr);
+ } else {
+ info.si_signo = SIGTRAP;
+ info.si_errno = 0;
+ if (trapnr == EXCP01_SSTP) {
+ info.si_code = TARGET_TRAP_BRKPT;
+ info._sifields._sigfault._addr = env->eip;
+ } else {
+ info.si_code = TARGET_SI_KERNEL;
+ info._sifields._sigfault._addr = 0;
+ }
+ queue_signal(info.si_signo, &info);
+ }
+ break;
+ case EXCP04_INTO:
+ case EXCP05_BOUND:
+ if (env->eflags & VM_MASK) {
+ handle_vm86_trap(env, trapnr);
+ } else {
+ info.si_signo = SIGSEGV;
+ info.si_errno = 0;
+ info.si_code = TARGET_SI_KERNEL;
+ info._sifields._sigfault._addr = 0;
+ queue_signal(info.si_signo, &info);
+ }
+ break;
+ case EXCP06_ILLOP:
+ info.si_signo = SIGILL;
+ info.si_errno = 0;
+ info.si_code = TARGET_ILL_ILLOPN;
+ info._sifields._sigfault._addr = env->eip;
+ queue_signal(info.si_signo, &info);
+ break;
+ case EXCP_INTERRUPT:
+ /* just indicate that signals should be handled asap */
+ break;
+ default:
+ pc = env->segs[R_CS].base + env->eip;
+ fprintf(stderr, "qemu: 0x%08lx: unhandled CPU exception 0x%x - aborting\n",
+ (long)pc, trapnr);
+ abort();
+ }
+ process_pending_signals(env);
+ }
+}
+#endif
+
+#ifdef TARGET_ARM
+
+void cpu_loop(CPUARMState *env)
+{
+ int trapnr;
+ unsigned int n, insn;
+ target_siginfo_t info;
+
+ for(;;) {
+ trapnr = cpu_arm_exec(env);
+ switch(trapnr) {
+ case EXCP_UDEF:
+ info.si_signo = SIGILL;
+ info.si_errno = 0;
+ info.si_code = TARGET_ILL_ILLOPN;
+ info._sifields._sigfault._addr = env->regs[15];
+ queue_signal(info.si_signo, &info);
+ break;
+ case EXCP_SWI:
+ {
+ /* system call */
+ insn = ldl((void *)(env->regs[15] - 4));
+ n = insn & 0xffffff;
+ if (n >= ARM_SYSCALL_BASE) {
+ /* linux syscall */
+ n -= ARM_SYSCALL_BASE;
+ env->regs[0] = do_syscall(env,
+ n,
+ env->regs[0],
+ env->regs[1],
+ env->regs[2],
+ env->regs[3],
+ env->regs[4],
+ 0);
+ } else {
+ goto error;
+ }
+ }
+ break;
+ case EXCP_INTERRUPT:
+ /* just indicate that signals should be handled asap */
+ break;
+ default:
+ error:
+ fprintf(stderr, "qemu: unhandled CPU exception 0x%x - aborting\n",
+ trapnr);
+ cpu_arm_dump_state(env, stderr, 0);
+ abort();
+ }
+ process_pending_signals(env);
+ }
+}
+
+#endif
void usage(void)
{
- printf("gemu version " GEMU_VERSION ", Copyright (c) 2003 Fabrice Bellard\n"
- "usage: gemu [-d] program [arguments...]\n"
- "Linux x86 emulator\n"
- );
- exit(1);
+ printf("qemu version " QEMU_VERSION ", Copyright (c) 2003 Fabrice Bellard\n"
+ "usage: qemu [-h] [-d] [-L path] [-s size] program [arguments...]\n"
+ "Linux CPU emulator (compiled for %s emulation)\n"
+ "\n"
+ "-h print this help\n"
+ "-L path set the elf interpreter prefix (default=%s)\n"
+ "-s size set the stack size in bytes (default=%ld)\n"
+ "\n"
+ "debug options:\n"
+ "-d activate log (logfile=%s)\n"
+ "-p pagesize set the host page size to 'pagesize'\n",
+ TARGET_ARCH,
+ interp_prefix,
+ x86_stack_size,
+ DEBUG_LOGFILE);
+ _exit(1);
}
+/* XXX: currently only used for async signals (see signal.c) */
+CPUState *global_env;
+/* used only if single thread */
+CPUState *cpu_single_env = NULL;
+/* used to free thread contexts */
+TaskState *first_task_state;
int main(int argc, char **argv)
{
const char *filename;
struct target_pt_regs regs1, *regs = ®s1;
struct image_info info1, *info = &info1;
- CPUX86State *env;
+ TaskState ts1, *ts = &ts1;
+ CPUState *env;
int optind;
-
+ const char *r;
+
if (argc <= 1)
usage();
+
loglevel = 0;
optind = 1;
- if (argv[optind] && !strcmp(argv[optind], "-d")) {
- loglevel = 1;
+ for(;;) {
+ if (optind >= argc)
+ break;
+ r = argv[optind];
+ if (r[0] != '-')
+ break;
optind++;
+ r++;
+ if (!strcmp(r, "-")) {
+ break;
+ } else if (!strcmp(r, "d")) {
+ loglevel = 1;
+ } else if (!strcmp(r, "s")) {
+ r = argv[optind++];
+ x86_stack_size = strtol(r, (char **)&r, 0);
+ if (x86_stack_size <= 0)
+ usage();
+ if (*r == 'M')
+ x86_stack_size *= 1024 * 1024;
+ else if (*r == 'k' || *r == 'K')
+ x86_stack_size *= 1024;
+ } else if (!strcmp(r, "L")) {
+ interp_prefix = argv[optind++];
+ } else if (!strcmp(r, "p")) {
+ host_page_size = atoi(argv[optind++]);
+ if (host_page_size == 0 ||
+ (host_page_size & (host_page_size - 1)) != 0) {
+ fprintf(stderr, "page size must be a power of two\n");
+ exit(1);
+ }
+ } else {
+ usage();
+ }
}
+ if (optind >= argc)
+ usage();
filename = argv[optind];
/* init debug */
logfile = fopen(DEBUG_LOGFILE, "w");
if (!logfile) {
perror(DEBUG_LOGFILE);
- exit(1);
+ _exit(1);
}
setvbuf(logfile, NULL, _IOLBF, 0);
}
/* Zero out image_info */
memset(info, 0, sizeof(struct image_info));
- if(elf_exec(filename, argv+optind, environ, regs, info) != 0) {
+ /* Scan interp_prefix dir for replacement files. */
+ init_paths(interp_prefix);
+
+ /* NOTE: we need to init the CPU at this stage to get the
+ host_page_size */
+ env = cpu_init();
+
+ if (elf_exec(filename, argv+optind, environ, regs, info) != 0) {
printf("Error loading %s\n", filename);
- exit(1);
+ _exit(1);
}
if (loglevel) {
+ page_dump(logfile);
+
fprintf(logfile, "start_brk 0x%08lx\n" , info->start_brk);
fprintf(logfile, "end_code 0x%08lx\n" , info->end_code);
fprintf(logfile, "start_code 0x%08lx\n" , info->start_code);
fprintf(logfile, "end_data 0x%08lx\n" , info->end_data);
fprintf(logfile, "start_stack 0x%08lx\n" , info->start_stack);
fprintf(logfile, "brk 0x%08lx\n" , info->brk);
- fprintf(logfile, "esp 0x%08lx\n" , regs->esp);
- fprintf(logfile, "eip 0x%08lx\n" , regs->eip);
+ fprintf(logfile, "entry 0x%08lx\n" , info->entry);
}
target_set_brk((char *)info->brk);
syscall_init();
+ signal_init();
+
+ global_env = env;
- env = cpu_x86_init();
+ /* build Task State */
+ memset(ts, 0, sizeof(TaskState));
+ env->opaque = ts;
+ ts->used = 1;
+ env->user_mode_only = 1;
+
+#if defined(TARGET_I386)
+ env->cr[0] = CR0_PG_MASK | CR0_WP_MASK | CR0_PE_MASK;
/* linux register setup */
env->regs[R_EAX] = regs->eax;
env->regs[R_ESP] = regs->esp;
env->eip = regs->eip;
+ /* linux interrupt setup */
+ env->idt.base = (void *)idt_table;
+ env->idt.limit = sizeof(idt_table) - 1;
+ set_idt(0, 0);
+ set_idt(1, 0);
+ set_idt(2, 0);
+ set_idt(3, 3);
+ set_idt(4, 3);
+ set_idt(5, 3);
+ set_idt(6, 0);
+ set_idt(7, 0);
+ set_idt(8, 0);
+ set_idt(9, 0);
+ set_idt(10, 0);
+ set_idt(11, 0);
+ set_idt(12, 0);
+ set_idt(13, 0);
+ set_idt(14, 0);
+ set_idt(15, 0);
+ set_idt(16, 0);
+ set_idt(17, 0);
+ set_idt(18, 0);
+ set_idt(19, 0);
+ set_idt(0x80, 3);
+
/* linux segment setup */
env->gdt.base = (void *)gdt_table;
env->gdt.limit = sizeof(gdt_table) - 1;
- write_dt(&gdt_table[__USER_CS >> 3], 0, 0xffffffff, 1);
- write_dt(&gdt_table[__USER_DS >> 3], 0, 0xffffffff, 1);
+ write_dt(&gdt_table[__USER_CS >> 3], 0, 0xfffff,
+ DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
+ (3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT));
+ write_dt(&gdt_table[__USER_DS >> 3], 0, 0xfffff,
+ DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
+ (3 << DESC_DPL_SHIFT) | (0x2 << DESC_TYPE_SHIFT));
cpu_x86_load_seg(env, R_CS, __USER_CS);
cpu_x86_load_seg(env, R_DS, __USER_DS);
cpu_x86_load_seg(env, R_ES, __USER_DS);
cpu_x86_load_seg(env, R_FS, __USER_DS);
cpu_x86_load_seg(env, R_GS, __USER_DS);
- for(;;) {
- int err;
- uint8_t *pc;
-
- err = cpu_x86_exec(env);
- pc = env->seg_cache[R_CS].base + env->eip;
- switch(err) {
- case EXCP0D_GPF:
- if (pc[0] == 0xcd && pc[1] == 0x80) {
- /* syscall */
- env->eip += 2;
- env->regs[R_EAX] = do_syscall(env,
- env->regs[R_EAX],
- env->regs[R_EBX],
- env->regs[R_ECX],
- env->regs[R_EDX],
- env->regs[R_ESI],
- env->regs[R_EDI],
- env->regs[R_EBP]);
- } else {
- goto trap_error;
- }
- break;
- default:
- trap_error:
- fprintf(stderr, "0x%08lx: Unknown exception %d, aborting\n",
- (long)pc, err);
- abort();
+#elif defined(TARGET_ARM)
+ {
+ int i;
+ for(i = 0; i < 16; i++) {
+ env->regs[i] = regs->uregs[i];
}
+ env->cpsr = regs->uregs[16];
}
+#else
+#error unsupported target CPU
+#endif
+
+ cpu_loop(env);
+ /* never exits */
return 0;
}
projects / qemu.git / blobdiff