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ARM emulation support
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@244 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard
parent
5a9fdfec7e
commit
b346ff468e
6 changed files with 231 additions and 30 deletions
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@ -38,6 +38,45 @@
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A value of 0 tells we have no such handler. */
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#define ELF_PLAT_INIT(_r) _r->edx = 0
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static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
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{
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regs->esp = infop->start_stack;
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regs->eip = infop->entry;
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}
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#define USE_ELF_CORE_DUMP
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#define ELF_EXEC_PAGESIZE 4096
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#endif
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#ifdef TARGET_ARM
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#define ELF_START_MMAP 0x80000000
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#define elf_check_arch(x) ( (x) == EM_ARM )
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#define ELF_CLASS ELFCLASS32
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#ifdef TARGET_WORDS_BIGENDIAN
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#define ELF_DATA ELFDATA2MSB
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#else
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#define ELF_DATA ELFDATA2LSB
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#endif
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#define ELF_ARCH EM_ARM
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#define ELF_PLAT_INIT(_r) _r->ARM_r0 = 0
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static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
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{
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target_long *stack = (void *)infop->start_stack;
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memset(regs, 0, sizeof(*regs));
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regs->ARM_cpsr = 0x10;
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regs->ARM_pc = infop->entry;
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regs->ARM_sp = infop->start_stack;
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regs->ARM_r2 = tswapl(stack[2]); /* envp */
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regs->ARM_r1 = tswapl(stack[1]); /* argv */
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regs->ARM_r0 = tswapl(stack[0]); /* argc */
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}
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#define USE_ELF_CORE_DUMP
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#define ELF_EXEC_PAGESIZE 4096
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@ -1148,8 +1187,7 @@ int elf_exec(const char * filename, char ** argv, char ** envp,
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}
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if(retval>=0) {
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/* success. Initialize important registers */
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regs->esp = infop->start_stack;
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regs->eip = infop->entry;
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init_thread(regs, infop);
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return retval;
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}
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@ -63,6 +63,7 @@ void gemu_log(const char *fmt, ...)
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va_end(ap);
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}
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#ifdef TARGET_I386
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/***********************************************************/
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/* CPUX86 core interface */
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@ -238,20 +239,76 @@ void cpu_loop(CPUX86State *env)
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process_pending_signals(env);
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}
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}
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#endif
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#ifdef TARGET_ARM
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#define ARM_SYSCALL_BASE 0x900000
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void cpu_loop(CPUARMState *env)
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{
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int trapnr;
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unsigned int n, insn;
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target_siginfo_t info;
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for(;;) {
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trapnr = cpu_arm_exec(env);
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switch(trapnr) {
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case EXCP_UDEF:
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info.si_signo = SIGILL;
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info.si_errno = 0;
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info.si_code = TARGET_ILL_ILLOPN;
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info._sifields._sigfault._addr = env->regs[15];
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queue_signal(info.si_signo, &info);
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break;
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case EXCP_SWI:
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{
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/* system call */
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insn = ldl((void *)(env->regs[15] - 4));
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n = insn & 0xffffff;
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if (n >= ARM_SYSCALL_BASE) {
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/* linux syscall */
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n -= ARM_SYSCALL_BASE;
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env->regs[0] = do_syscall(env,
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n,
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env->regs[0],
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env->regs[1],
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env->regs[2],
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env->regs[3],
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env->regs[4],
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0);
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} else {
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goto error;
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}
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}
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break;
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default:
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error:
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fprintf(stderr, "qemu: unhandled CPU exception 0x%x - aborting\n",
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trapnr);
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cpu_arm_dump_state(env, stderr, 0);
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abort();
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}
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process_pending_signals(env);
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}
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}
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#endif
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void usage(void)
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{
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printf("qemu version " QEMU_VERSION ", Copyright (c) 2003 Fabrice Bellard\n"
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"usage: qemu [-h] [-d] [-L path] [-s size] program [arguments...]\n"
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"Linux x86 emulator\n"
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"Linux CPU emulator (compiled for %s emulation)\n"
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"\n"
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"-h print this help\n"
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"-L path set the x86 elf interpreter prefix (default=%s)\n"
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"-s size set the x86 stack size in bytes (default=%ld)\n"
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"-L path set the elf interpreter prefix (default=%s)\n"
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"-s size set the stack size in bytes (default=%ld)\n"
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"\n"
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"debug options:\n"
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"-d activate log (logfile=%s)\n"
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"-p pagesize set the host page size to 'pagesize'\n",
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TARGET_ARCH,
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interp_prefix,
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x86_stack_size,
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DEBUG_LOGFILE);
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@ -259,7 +316,7 @@ void usage(void)
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}
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/* XXX: currently only used for async signals (see signal.c) */
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CPUX86State *global_env;
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CPUState *global_env;
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/* used to free thread contexts */
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TaskState *first_task_state;
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@ -269,7 +326,7 @@ int main(int argc, char **argv)
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struct target_pt_regs regs1, *regs = ®s1;
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struct image_info info1, *info = &info1;
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TaskState ts1, *ts = &ts1;
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CPUX86State *env;
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CPUState *env;
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int optind;
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const char *r;
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@ -337,7 +394,7 @@ int main(int argc, char **argv)
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/* NOTE: we need to init the CPU at this stage to get the
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host_page_size */
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env = cpu_x86_init();
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env = cpu_init();
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if (elf_exec(filename, argv+optind, environ, regs, info) != 0) {
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printf("Error loading %s\n", filename);
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@ -353,8 +410,7 @@ int main(int argc, char **argv)
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fprintf(logfile, "end_data 0x%08lx\n" , info->end_data);
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fprintf(logfile, "start_stack 0x%08lx\n" , info->start_stack);
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fprintf(logfile, "brk 0x%08lx\n" , info->brk);
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fprintf(logfile, "esp 0x%08lx\n" , regs->esp);
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fprintf(logfile, "eip 0x%08lx\n" , regs->eip);
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fprintf(logfile, "entry 0x%08lx\n" , info->entry);
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}
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target_set_brk((char *)info->brk);
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@ -368,6 +424,7 @@ int main(int argc, char **argv)
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env->opaque = ts;
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ts->used = 1;
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#if defined(TARGET_I386)
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/* linux register setup */
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env->regs[R_EAX] = regs->eax;
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env->regs[R_EBX] = regs->ebx;
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@ -419,6 +476,17 @@ int main(int argc, char **argv)
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cpu_x86_load_seg(env, R_SS, __USER_DS);
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cpu_x86_load_seg(env, R_FS, __USER_DS);
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cpu_x86_load_seg(env, R_GS, __USER_DS);
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#elif defined(TARGET_ARM)
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{
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int i;
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for(i = 0; i < 16; i++) {
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env->regs[i] = regs->uregs[i];
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}
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env->cpsr = regs->uregs[16];
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}
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#else
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#error unsupported target CPU
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#endif
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cpu_loop(env);
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/* never exits */
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@ -6,10 +6,8 @@
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#include <signal.h>
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#include "syscall_defs.h"
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#ifdef TARGET_I386
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#include "cpu-i386.h"
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#include "syscall-i386.h"
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#endif
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#include "cpu-" TARGET_ARCH ".h"
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#include "syscall-" TARGET_ARCH ".h"
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/* This struct is used to hold certain information about the image.
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* Basically, it replicates in user space what would be certain
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@ -33,6 +31,7 @@ struct image_info {
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int personality;
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};
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#ifdef TARGET_I386
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/* Information about the current linux thread */
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struct vm86_saved_state {
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uint32_t eax; /* return code */
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@ -47,16 +46,19 @@ struct vm86_saved_state {
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uint32_t eip;
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uint16_t cs, ss, ds, es, fs, gs;
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};
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#endif
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/* NOTE: we force a big alignment so that the stack stored after is
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aligned too */
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typedef struct TaskState {
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struct TaskState *next;
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#ifdef TARGET_I386
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struct target_vm86plus_struct *target_v86;
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struct vm86_saved_state vm86_saved_regs;
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struct target_vm86plus_struct vm86plus;
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uint32_t v86flags;
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uint32_t v86mask;
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#endif
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int used; /* non zero if used */
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uint8_t stack[0];
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} __attribute__((aligned(16))) TaskState;
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@ -71,23 +73,31 @@ void syscall_init(void);
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long do_syscall(void *cpu_env, int num, long arg1, long arg2, long arg3,
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long arg4, long arg5, long arg6);
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void gemu_log(const char *fmt, ...) __attribute__((format(printf,1,2)));
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extern CPUX86State *global_env;
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void cpu_loop(CPUX86State *env);
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void process_pending_signals(void *cpu_env);
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void signal_init(void);
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int queue_signal(int sig, target_siginfo_t *info);
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extern CPUState *global_env;
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void cpu_loop(CPUState *env);
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void init_paths(const char *prefix);
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const char *path(const char *pathname);
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extern int loglevel;
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extern FILE *logfile;
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/* signal.c */
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void process_pending_signals(void *cpu_env);
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void signal_init(void);
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int queue_signal(int sig, target_siginfo_t *info);
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void host_to_target_siginfo(target_siginfo_t *tinfo, const siginfo_t *info);
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void target_to_host_siginfo(siginfo_t *info, const target_siginfo_t *tinfo);
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long do_sigreturn(CPUState *env);
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long do_rt_sigreturn(CPUState *env);
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#ifdef TARGET_I386
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/* vm86.c */
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void save_v86_state(CPUX86State *env);
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void handle_vm86_trap(CPUX86State *env, int trapno);
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void handle_vm86_fault(CPUX86State *env);
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int do_vm86(CPUX86State *env, long subfunction,
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struct target_vm86plus_struct * target_v86);
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#endif
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/* mmap.c */
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int target_mprotect(unsigned long start, unsigned long len, int prot);
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@ -318,7 +318,7 @@ static void host_signal_handler(int host_signum, siginfo_t *info,
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/* the CPU emulator uses some host signals to detect exceptions,
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we we forward to it some signals */
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if (host_signum == SIGSEGV || host_signum == SIGBUS) {
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if (cpu_x86_signal_handler(host_signum, info, puc))
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if (cpu_signal_handler(host_signum, info, puc))
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return;
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}
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@ -333,7 +333,7 @@ static void host_signal_handler(int host_signum, siginfo_t *info,
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host_to_target_siginfo_noswap(&tinfo, info);
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if (queue_signal(sig, &tinfo) == 1) {
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/* interrupt the virtual CPU as soon as possible */
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cpu_x86_interrupt(global_env);
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cpu_interrupt(global_env);
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}
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}
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@ -824,6 +824,33 @@ badframe:
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return 0;
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}
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#else
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static void setup_frame(int sig, struct emulated_sigaction *ka,
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target_sigset_t *set, CPUState *env)
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{
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fprintf(stderr, "setup_frame: not implemented\n");
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}
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static void setup_rt_frame(int sig, struct emulated_sigaction *ka,
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target_siginfo_t *info,
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target_sigset_t *set, CPUState *env)
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{
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fprintf(stderr, "setup_rt_frame: not implemented\n");
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}
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long do_sigreturn(CPUState *env)
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{
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fprintf(stderr, "do_sigreturn: not implemented\n");
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return -ENOSYS;
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}
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long do_rt_sigreturn(CPUState *env)
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{
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fprintf(stderr, "do_rt_sigreturn: not implemented\n");
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return -ENOSYS;
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}
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#endif
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void process_pending_signals(void *cpu_env)
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