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ARM emulation support

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git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@244 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard 2003-06-15 20:05:50 +00:00
parent 5a9fdfec7e
commit b346ff468e
6 changed files with 231 additions and 30 deletions
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84
linux-user/main.c
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@ -63,6 +63,7 @@ void gemu_log(const char *fmt, ...)
va_end(ap);
}
#ifdef TARGET_I386
/***********************************************************/
/* CPUX86 core interface */
@ -238,20 +239,76 @@ void cpu_loop(CPUX86State *env)
process_pending_signals(env);
}
}
#endif
#ifdef TARGET_ARM
#define ARM_SYSCALL_BASE 0x900000
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;
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("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"
"Linux CPU emulator (compiled for %s emulation)\n"
"\n"
"-h print this help\n"
"-L path set the x86 elf interpreter prefix (default=%s)\n"
"-s size set the x86 stack size in bytes (default=%ld)\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);
@ -259,7 +316,7 @@ void usage(void)
}
/* XXX: currently only used for async signals (see signal.c) */
CPUX86State *global_env;
CPUState *global_env;
/* used to free thread contexts */
TaskState *first_task_state;
@ -269,7 +326,7 @@ int main(int argc, char **argv)
struct target_pt_regs regs1, *regs = &regs1;
struct image_info info1, *info = &info1;
TaskState ts1, *ts = &ts1;
CPUX86State *env;
CPUState *env;
int optind;
const char *r;
@ -337,7 +394,7 @@ int main(int argc, char **argv)
/* NOTE: we need to init the CPU at this stage to get the
host_page_size */
env = cpu_x86_init();
env = cpu_init();
if (elf_exec(filename, argv+optind, environ, regs, info) != 0) {
printf("Error loading %s\n", filename);
@ -353,8 +410,7 @@ int main(int argc, char **argv)
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);
@ -368,6 +424,7 @@ int main(int argc, char **argv)
env->opaque = ts;
ts->used = 1;
#if defined(TARGET_I386)
/* linux register setup */
env->regs[R_EAX] = regs->eax;
env->regs[R_EBX] = regs->ebx;
@ -419,6 +476,17 @@ int main(int argc, char **argv)
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_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 */