/*
- * qemu main
+ * qemu user main
*
* Copyright (c) 2003 Fabrice Bellard
*
#include "qemu.h"
-#include "cpu-i386.h"
-
#define DEBUG_LOGFILE "/tmp/qemu.log"
FILE *logfile = NULL;
/* 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
+/* for recent libc, we add these dummy symbols 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 __fini_array_end[0];
#endif
-#endif
-
/* 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 */
va_end(ap);
}
+#ifdef TARGET_I386
/***********************************************************/
/* CPUX86 core interface */
return 0;
}
-void write_dt(void *ptr, unsigned long addr, unsigned long limit,
- int seg32_bit)
+int cpu_x86_get_pic_interrupt(CPUX86State *env)
{
- unsigned int e1, e2, limit_in_pages;
- limit_in_pages = 0;
- if (limit > 0xffff) {
- limit = limit >> 12;
- limit_in_pages = 1;
- }
+ return -1;
+}
+
+static 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 |= 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)
{
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 {
- pc = env->seg_cache[R_CS].base + env->eip;
- 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 {
- /* XXX: more precise info */
- 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);
- }
+ 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_code = TARGET_SEGV_MAPERR;
else
info.si_code = TARGET_SEGV_ACCERR;
- info._sifields._sigfault._addr = env->cr2;
+ info._sifields._sigfault._addr = env->cr[2];
queue_signal(info.si_signo, &info);
break;
case EXCP00_DIVZ:
/* just indicate that signals should be handled asap */
break;
default:
- pc = env->seg_cache[R_CS].base + env->eip;
+ 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
+
+#ifdef TARGET_SPARC
+
+void cpu_loop (CPUSPARCState *env)
+{
+ int trapnr;
+
+ while (1) {
+ trapnr = cpu_sparc_exec (env);
+
+ switch (trapnr) {
+ case 0x8: case 0x10:
+ env->regwptr[0] = do_syscall (env, env->gregs[1],
+ env->regwptr[0], env->regwptr[1], env->regwptr[2],
+ env->regwptr[3], env->regwptr[4], env->regwptr[13]);
+ if (env->regwptr[0] >= 0xffffffe0)
+ env->psr |= PSR_CARRY;
+ break;
+ default:
+ printf ("Invalid trap: %d\n", trapnr);
+ exit (1);
+ }
+ process_pending_signals (env);
+ }
+}
+
+#endif
void usage(void)
{
- printf("qemu version " QEMU_VERSION ", Copyright (c) 2003 Fabrice Bellard\n"
- "usage: qemu [-h] [-d] [-L path] [-s size] program [arguments...]\n"
- "Linux x86 emulator\n"
+ printf("qemu-" TARGET_ARCH " version " QEMU_VERSION ", Copyright (c) 2003 Fabrice Bellard\n"
+ "usage: qemu-" TARGET_ARCH " [-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"
- "-h print this help\n"
- "-d activate log (logfile=%s)\n"
- "-L path set the x86 elf interpreter prefix (default=%s)\n"
- "-s size set the x86 stack size in bytes (default=%ld)\n",
- DEBUG_LOGFILE,
+ "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);
+ x86_stack_size,
+ DEBUG_LOGFILE);
_exit(1);
}
/* XXX: currently only used for async signals (see signal.c) */
-CPUX86State *global_env;
+CPUState *global_env;
+/* used only if single thread */
+CPUState *cpu_single_env = NULL;
+
/* used to free thread contexts */
TaskState *first_task_state;
struct target_pt_regs regs1, *regs = ®s1;
struct image_info info1, *info = &info1;
TaskState ts1, *ts = &ts1;
- CPUX86State *env;
+ CPUState *env;
int optind;
const char *r;
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();
}
/* 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);
}
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();
- env = cpu_x86_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;
+
/* linux register setup */
env->regs[R_EAX] = regs->eax;
env->regs[R_EBX] = regs->ebx;
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);
+#elif defined(TARGET_ARM)
+ {
+ int i;
+ for(i = 0; i < 16; i++) {
+ env->regs[i] = regs->uregs[i];
+ }
+ env->cpsr = regs->uregs[16];
+ }
+#elif defined(TARGET_SPARC)
+ env->pc = regs->u_regs[0];
+ env->regwptr[6] = regs->u_regs[1]-0x40;
+#else
+#error unsupported target CPU
+#endif
+
cpu_loop(env);
/* never exits */
return 0;
projects / qemu / blobdiff