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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 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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5
exec.c
View File

@ -70,7 +70,7 @@ unsigned long host_page_mask;
static PageDesc *l1_map[L1_SIZE];
void page_init(void)
static void page_init(void)
{
/* NOTE: we can always suppose that host_page_size >=
TARGET_PAGE_SIZE */
@ -190,10 +190,11 @@ void page_set_flags(unsigned long start, unsigned long end, int flags)
spin_unlock(&tb_lock);
}
void cpu_x86_tblocks_init(void)
void cpu_exec_init(void)
{
if (!code_gen_ptr) {
code_gen_ptr = code_gen_buffer;
page_init();
}
}

71
exec.h
View File

@ -18,6 +18,31 @@
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/* allow to see translation results - the slowdown should be negligible, so we leave it */
#define DEBUG_DISAS
/* is_jmp field values */
#define DISAS_NEXT 0 /* next instruction can be analyzed */
#define DISAS_JUMP 1 /* only pc was modified dynamically */
#define DISAS_UPDATE 2 /* cpu state was modified dynamically */
#define DISAS_TB_JUMP 3 /* only pc was modified statically */
struct TranslationBlock;
/* XXX: make safe guess about sizes */
#define MAX_OP_PER_INSTR 32
#define OPC_BUF_SIZE 512
#define OPC_MAX_SIZE (OPC_BUF_SIZE - MAX_OP_PER_INSTR)
#define OPPARAM_BUF_SIZE (OPC_BUF_SIZE * 3)
extern uint16_t gen_opc_buf[OPC_BUF_SIZE];
extern uint32_t gen_opparam_buf[OPPARAM_BUF_SIZE];
extern uint32_t gen_opc_pc[OPC_BUF_SIZE];
extern uint8_t gen_opc_instr_start[OPC_BUF_SIZE];
#if defined(TARGET_I386)
#define GEN_FLAG_CODE32_SHIFT 0
#define GEN_FLAG_ADDSEG_SHIFT 1
#define GEN_FLAG_SS32_SHIFT 2
@ -27,13 +52,18 @@
#define GEN_FLAG_CPL_SHIFT 9
#define GEN_FLAG_IOPL_SHIFT 12 /* same position as eflags */
struct TranslationBlock;
int cpu_x86_gen_code(struct TranslationBlock *tb,
int max_code_size, int *gen_code_size_ptr);
int cpu_x86_search_pc(struct TranslationBlock *tb,
uint32_t *found_pc, unsigned long searched_pc);
void cpu_x86_tblocks_init(void);
void page_init(void);
#endif
extern FILE *logfile;
extern int loglevel;
int gen_intermediate_code(struct TranslationBlock *tb, int search_pc);
void dump_ops(const uint16_t *opc_buf, const uint32_t *opparam_buf);
int cpu_gen_code(struct TranslationBlock *tb,
int max_code_size, int *gen_code_size_ptr);
int cpu_search_pc(struct TranslationBlock *tb,
uint32_t *found_pc, unsigned long searched_pc);
void cpu_exec_init(void);
int page_unprotect(unsigned long address);
#define CODE_GEN_MAX_SIZE 65536
@ -167,6 +197,33 @@ TranslationBlock *tb_find_pc(unsigned long pc_ptr);
#define offsetof(type, field) ((size_t) &((type *)0)->field)
#endif
#if defined(__powerpc__)
/* on PowerPC we patch the jump instruction directly */
#define JUMP_TB(tbparam, n, eip)\
do {\
static void __attribute__((unused)) *__op_label ## n = &&label ## n;\
asm volatile ("b %0" : : "i" (&__op_jmp ## n));\
label ## n:\
T0 = (long)(tbparam) + (n);\
EIP = eip;\
} while (0)
#else
/* jump to next block operations (more portable code, does not need
cache flushing, but slower because of indirect jump) */
#define JUMP_TB(tbparam, n, eip)\
do {\
static void __attribute__((unused)) *__op_label ## n = &&label ## n;\
goto *(void *)(((TranslationBlock *)tbparam)->tb_next[n]);\
label ## n:\
T0 = (long)(tbparam) + (n);\
EIP = eip;\
} while (0)
#endif
#ifdef __powerpc__
static inline int testandset (int *p)
{

42
linux-user/elfload.c
View File

@ -38,6 +38,45 @@
A value of 0 tells we have no such handler. */
#define ELF_PLAT_INIT(_r) _r->edx = 0
static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
{
regs->esp = infop->start_stack;
regs->eip = infop->entry;
}
#define USE_ELF_CORE_DUMP
#define ELF_EXEC_PAGESIZE 4096
#endif
#ifdef TARGET_ARM
#define ELF_START_MMAP 0x80000000
#define elf_check_arch(x) ( (x) == EM_ARM )
#define ELF_CLASS ELFCLASS32
#ifdef TARGET_WORDS_BIGENDIAN
#define ELF_DATA ELFDATA2MSB
#else
#define ELF_DATA ELFDATA2LSB
#endif
#define ELF_ARCH EM_ARM
#define ELF_PLAT_INIT(_r) _r->ARM_r0 = 0
static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop)
{
target_long *stack = (void *)infop->start_stack;
memset(regs, 0, sizeof(*regs));
regs->ARM_cpsr = 0x10;
regs->ARM_pc = infop->entry;
regs->ARM_sp = infop->start_stack;
regs->ARM_r2 = tswapl(stack[2]); /* envp */
regs->ARM_r1 = tswapl(stack[1]); /* argv */
regs->ARM_r0 = tswapl(stack[0]); /* argc */
}
#define USE_ELF_CORE_DUMP
#define ELF_EXEC_PAGESIZE 4096
@ -1148,8 +1187,7 @@ int elf_exec(const char * filename, char ** argv, char ** envp,
}
if(retval>=0) {
/* success. Initialize important registers */
regs->esp = infop->start_stack;
regs->eip = infop->entry;
init_thread(regs, infop);
return retval;
}

84
linux-user/main.c
View File

@ -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 */

28
linux-user/qemu.h
View File

@ -6,10 +6,8 @@
#include <signal.h>
#include "syscall_defs.h"
#ifdef TARGET_I386
#include "cpu-i386.h"
#include "syscall-i386.h"
#endif
#include "cpu-" TARGET_ARCH ".h"
#include "syscall-" TARGET_ARCH ".h"
/* This struct is used to hold certain information about the image.
* Basically, it replicates in user space what would be certain
@ -33,6 +31,7 @@ struct image_info {
int personality;
};
#ifdef TARGET_I386
/* Information about the current linux thread */
struct vm86_saved_state {
uint32_t eax; /* return code */
@ -47,16 +46,19 @@ struct vm86_saved_state {
uint32_t eip;
uint16_t cs, ss, ds, es, fs, gs;
};
#endif
/* NOTE: we force a big alignment so that the stack stored after is
aligned too */
typedef struct TaskState {
struct TaskState *next;
#ifdef TARGET_I386
struct target_vm86plus_struct *target_v86;
struct vm86_saved_state vm86_saved_regs;
struct target_vm86plus_struct vm86plus;
uint32_t v86flags;
uint32_t v86mask;
#endif
int used; /* non zero if used */
uint8_t stack[0];
} __attribute__((aligned(16))) TaskState;
@ -71,23 +73,31 @@ void syscall_init(void);
long do_syscall(void *cpu_env, int num, long arg1, long arg2, long arg3,
long arg4, long arg5, long arg6);
void gemu_log(const char *fmt, ...) __attribute__((format(printf,1,2)));
extern CPUX86State *global_env;
void cpu_loop(CPUX86State *env);
void process_pending_signals(void *cpu_env);
void signal_init(void);
int queue_signal(int sig, target_siginfo_t *info);
extern CPUState *global_env;
void cpu_loop(CPUState *env);
void init_paths(const char *prefix);
const char *path(const char *pathname);
extern int loglevel;
extern FILE *logfile;
/* signal.c */
void process_pending_signals(void *cpu_env);
void signal_init(void);
int queue_signal(int sig, target_siginfo_t *info);
void host_to_target_siginfo(target_siginfo_t *tinfo, const siginfo_t *info);
void target_to_host_siginfo(siginfo_t *info, const target_siginfo_t *tinfo);
long do_sigreturn(CPUState *env);
long do_rt_sigreturn(CPUState *env);
#ifdef TARGET_I386
/* vm86.c */
void save_v86_state(CPUX86State *env);
void handle_vm86_trap(CPUX86State *env, int trapno);
void handle_vm86_fault(CPUX86State *env);
int do_vm86(CPUX86State *env, long subfunction,
struct target_vm86plus_struct * target_v86);
#endif
/* mmap.c */
int target_mprotect(unsigned long start, unsigned long len, int prot);

31
linux-user/signal.c
View File

@ -318,7 +318,7 @@ static void host_signal_handler(int host_signum, siginfo_t *info,
/* the CPU emulator uses some host signals to detect exceptions,
we we forward to it some signals */
if (host_signum == SIGSEGV || host_signum == SIGBUS) {
if (cpu_x86_signal_handler(host_signum, info, puc))
if (cpu_signal_handler(host_signum, info, puc))
return;
}
@ -333,7 +333,7 @@ static void host_signal_handler(int host_signum, siginfo_t *info,
host_to_target_siginfo_noswap(&tinfo, info);
if (queue_signal(sig, &tinfo) == 1) {
/* interrupt the virtual CPU as soon as possible */
cpu_x86_interrupt(global_env);
cpu_interrupt(global_env);
}
}
@ -824,6 +824,33 @@ badframe:
return 0;
}
#else
static void setup_frame(int sig, struct emulated_sigaction *ka,
target_sigset_t *set, CPUState *env)
{
fprintf(stderr, "setup_frame: not implemented\n");
}
static void setup_rt_frame(int sig, struct emulated_sigaction *ka,
target_siginfo_t *info,
target_sigset_t *set, CPUState *env)
{
fprintf(stderr, "setup_rt_frame: not implemented\n");
}
long do_sigreturn(CPUState *env)
{
fprintf(stderr, "do_sigreturn: not implemented\n");
return -ENOSYS;
}
long do_rt_sigreturn(CPUState *env)
{
fprintf(stderr, "do_rt_sigreturn: not implemented\n");
return -ENOSYS;
}
#endif
void process_pending_signals(void *cpu_env)