/*
- * 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;
-int loglevel;
static const char *interp_prefix = CONFIG_QEMU_PREFIX;
-#ifdef __i386__
+#if defined(__i386__) && !defined(CONFIG_STATIC)
/* 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);
}
-uint64_t gdt_table[6];
-
-//#define DEBUG_VM86
-
-static inline int is_revectored(int nr, struct target_revectored_struct *bitmap)
+static void set_gate(void *ptr, unsigned int type, unsigned int dpl,
+ unsigned long addr, unsigned int sel)
{
- return (tswap32(bitmap->__map[nr >> 5]) >> (nr & 0x1f)) & 1;
-}
-
-static inline uint8_t *seg_to_linear(unsigned int seg, unsigned int reg)
-{
- return (uint8_t *)((seg << 4) + (reg & 0xffff));
-}
-
-static inline void pushw(CPUX86State *env, int val)
-{
- env->regs[R_ESP] = (env->regs[R_ESP] & ~0xffff) |
- ((env->regs[R_ESP] - 2) & 0xffff);
- *(uint16_t *)seg_to_linear(env->segs[R_SS], env->regs[R_ESP]) = val;
-}
-
-static inline unsigned int get_vflags(CPUX86State *env)
-{
- unsigned int eflags;
- eflags = env->eflags & ~(VM_MASK | RF_MASK | IF_MASK);
- if (eflags & VIF_MASK)
- eflags |= IF_MASK;
- return eflags;
-}
-
-void save_v86_state(CPUX86State *env)
-{
- TaskState *ts = env->opaque;
-#ifdef DEBUG_VM86
- printf("save_v86_state\n");
-#endif
-
- /* put the VM86 registers in the userspace register structure */
- ts->target_v86->regs.eax = tswap32(env->regs[R_EAX]);
- ts->target_v86->regs.ebx = tswap32(env->regs[R_EBX]);
- ts->target_v86->regs.ecx = tswap32(env->regs[R_ECX]);
- ts->target_v86->regs.edx = tswap32(env->regs[R_EDX]);
- ts->target_v86->regs.esi = tswap32(env->regs[R_ESI]);
- ts->target_v86->regs.edi = tswap32(env->regs[R_EDI]);
- ts->target_v86->regs.ebp = tswap32(env->regs[R_EBP]);
- ts->target_v86->regs.esp = tswap32(env->regs[R_ESP]);
- ts->target_v86->regs.eip = tswap32(env->eip);
- ts->target_v86->regs.cs = tswap16(env->segs[R_CS]);
- ts->target_v86->regs.ss = tswap16(env->segs[R_SS]);
- ts->target_v86->regs.ds = tswap16(env->segs[R_DS]);
- ts->target_v86->regs.es = tswap16(env->segs[R_ES]);
- ts->target_v86->regs.fs = tswap16(env->segs[R_FS]);
- ts->target_v86->regs.gs = tswap16(env->segs[R_GS]);
- ts->target_v86->regs.eflags = tswap32(env->eflags);
-
- /* restore 32 bit registers */
- env->regs[R_EAX] = ts->vm86_saved_regs.eax;
- env->regs[R_EBX] = ts->vm86_saved_regs.ebx;
- env->regs[R_ECX] = ts->vm86_saved_regs.ecx;
- env->regs[R_EDX] = ts->vm86_saved_regs.edx;
- env->regs[R_ESI] = ts->vm86_saved_regs.esi;
- env->regs[R_EDI] = ts->vm86_saved_regs.edi;
- env->regs[R_EBP] = ts->vm86_saved_regs.ebp;
- env->regs[R_ESP] = ts->vm86_saved_regs.esp;
- env->eflags = ts->vm86_saved_regs.eflags;
- env->eip = ts->vm86_saved_regs.eip;
-
- cpu_x86_load_seg(env, R_CS, ts->vm86_saved_regs.cs);
- cpu_x86_load_seg(env, R_SS, ts->vm86_saved_regs.ss);
- cpu_x86_load_seg(env, R_DS, ts->vm86_saved_regs.ds);
- cpu_x86_load_seg(env, R_ES, ts->vm86_saved_regs.es);
- cpu_x86_load_seg(env, R_FS, ts->vm86_saved_regs.fs);
- cpu_x86_load_seg(env, R_GS, ts->vm86_saved_regs.gs);
+ 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);
}
-/* return from vm86 mode to 32 bit. The vm86() syscall will return
- 'retval' */
-static inline void return_to_32bit(CPUX86State *env, int retval)
-{
-#ifdef DEBUG_VM86
- printf("return_to_32bit: ret=0x%x\n", retval);
-#endif
- save_v86_state(env);
- env->regs[R_EAX] = retval;
-}
+uint64_t gdt_table[6];
+uint64_t idt_table[256];
-/* handle VM86 interrupt (NOTE: the CPU core currently does not
- support TSS interrupt revectoring, so this code is always executed) */
-static void do_int(CPUX86State *env, int intno)
+/* only dpl matters as we do only user space emulation */
+static void set_idt(int n, unsigned int dpl)
{
- TaskState *ts = env->opaque;
- uint32_t *int_ptr, segoffs;
-
- if (env->segs[R_CS] == TARGET_BIOSSEG)
- goto cannot_handle; /* XXX: I am not sure this is really useful */
- if (is_revectored(intno, &ts->target_v86->int_revectored))
- goto cannot_handle;
- if (intno == 0x21 && is_revectored((env->regs[R_EAX] >> 8) & 0xff,
- &ts->target_v86->int21_revectored))
- goto cannot_handle;
- int_ptr = (uint32_t *)(intno << 2);
- segoffs = tswap32(*int_ptr);
- if ((segoffs >> 16) == TARGET_BIOSSEG)
- goto cannot_handle;
-#ifdef DEBUG_VM86
- printf("VM86: emulating int 0x%x. CS:IP=%04x:%04x\n",
- intno, segoffs >> 16, segoffs & 0xffff);
-#endif
- /* save old state */
- pushw(env, get_vflags(env));
- pushw(env, env->segs[R_CS]);
- pushw(env, env->eip);
- /* goto interrupt handler */
- env->eip = segoffs & 0xffff;
- cpu_x86_load_seg(env, R_CS, segoffs >> 16);
- env->eflags &= ~(VIF_MASK | TF_MASK);
- return;
- cannot_handle:
-#ifdef DEBUG_VM86
- printf("VM86: return to 32 bits int 0x%x\n", intno);
-#endif
- return_to_32bit(env, TARGET_VM86_INTx | (intno << 8));
+ set_gate(idt_table + n, 0, dpl, 0, 0);
}
-void cpu_loop(struct CPUX86State *env)
+void cpu_loop(CPUX86State *env)
{
int trapnr;
uint8_t *pc;
for(;;) {
trapnr = cpu_x86_exec(env);
- pc = env->seg_cache[R_CS].base + env->eip;
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) {
-#ifdef DEBUG_VM86
- printf("VM86 exception %04x:%08x %02x %02x\n",
- env->segs[R_CS], env->eip, pc[0], pc[1]);
-#endif
- /* VM86 mode */
- switch(pc[0]) {
- case 0xcd: /* int */
- env->eip += 2;
- do_int(env, pc[1]);
- break;
- case 0x66:
- switch(pc[1]) {
- case 0xfb: /* sti */
- case 0x9d: /* popf */
- case 0xcf: /* iret */
- env->eip += 2;
- return_to_32bit(env, TARGET_VM86_STI);
- break;
- default:
- goto vm86_gpf;
- }
- break;
- case 0xfb: /* sti */
- case 0x9d: /* popf */
- case 0xcf: /* iret */
- env->eip++;
- return_to_32bit(env, TARGET_VM86_STI);
- break;
- default:
- vm86_gpf:
- /* real VM86 GPF exception */
- return_to_32bit(env, TARGET_VM86_UNKNOWN);
- break;
- }
+ handle_vm86_fault(env);
} else {
- 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:
if (env->eflags & VM_MASK) {
- do_int(env, trapnr);
+ handle_vm86_trap(env, trapnr);
} else {
/* division by zero */
info.si_signo = SIGFPE;
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) {
- do_int(env, trapnr);
+ handle_vm86_trap(env, trapnr);
} else {
info.si_signo = SIGSEGV;
info.si_errno = 0;
/* 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
+
+#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"
- "-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,
+ "-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);
+ 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;
if (argc <= 1)
usage();
- loglevel = 0;
+ /* init debug */
+ cpu_set_log_filename(DEBUG_LOGFILE);
+
optind = 1;
for(;;) {
if (optind >= argc)
if (!strcmp(r, "-")) {
break;
} else if (!strcmp(r, "d")) {
- loglevel = 1;
+ cpu_set_log(CPU_LOG_ALL);
} else if (!strcmp(r, "s")) {
r = argv[optind++];
x86_stack_size = strtol(r, (char **)&r, 0);
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();
}
usage();
filename = argv[optind];
- /* init debug */
- if (loglevel) {
- logfile = fopen(DEBUG_LOGFILE, "w");
- if (!logfile) {
- perror(DEBUG_LOGFILE);
- _exit(1);
- }
- setvbuf(logfile, NULL, _IOLBF, 0);
- }
-
/* Zero out regs */
memset(regs, 0, sizeof(struct target_pt_regs));
/* 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.git / blobdiff