initial global prologue/epilogue implementation

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4407 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard 2008-05-10 10:55:51 +00:00
parent b03cce8e08
commit 7cb69cae20
2 changed files with 31 additions and 78 deletions

View File

@ -18,8 +18,10 @@
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "config.h"
#define CPU_NO_GLOBAL_REGS
#include "exec.h"
#include "disas.h"
#include "tcg.h"
#if !defined(CONFIG_SOFTMMU)
#undef EAX
@ -292,7 +294,6 @@ int cpu_exec(CPUState *env1)
#endif
#endif
int ret, interrupt_request;
unsigned long (*gen_func)(void);
TranslationBlock *tb;
uint8_t *tc_ptr;
@ -652,67 +653,7 @@ int cpu_exec(CPUState *env1)
tc_ptr = tb->tc_ptr;
env->current_tb = tb;
/* execute the generated code */
gen_func = (void *)tc_ptr;
#if defined(__sparc__)
__asm__ __volatile__("call %0\n\t"
"mov %%o7,%%i0"
: /* no outputs */
: "r" (gen_func)
: "i0", "i1", "i2", "i3", "i4", "i5",
"o0", "o1", "o2", "o3", "o4", "o5",
"l0", "l1", "l2", "l3", "l4", "l5",
"l6", "l7");
#elif defined(__hppa__)
asm volatile ("ble 0(%%sr4,%1)\n"
"copy %%r31,%%r18\n"
"copy %%r28,%0\n"
: "=r" (next_tb)
: "r" (gen_func)
: "r1", "r2", "r3", "r4", "r5", "r6", "r7",
"r8", "r9", "r10", "r11", "r12", "r13",
"r18", "r19", "r20", "r21", "r22", "r23",
"r24", "r25", "r26", "r27", "r28", "r29",
"r30", "r31");
#elif defined(__arm__)
asm volatile ("mov pc, %0\n\t"
".global exec_loop\n\t"
"exec_loop:\n\t"
: /* no outputs */
: "r" (gen_func)
: "r1", "r2", "r3", "r8", "r9", "r10", "r12", "r14");
#elif defined(__ia64)
struct fptr {
void *ip;
void *gp;
} fp;
fp.ip = tc_ptr;
fp.gp = code_gen_buffer + 2 * (1 << 20);
(*(void (*)(void)) &fp)();
#elif defined(__i386)
asm volatile ("sub $12, %%esp\n\t"
"push %%ebp\n\t"
"call *%1\n\t"
"pop %%ebp\n\t"
"add $12, %%esp\n\t"
: "=a" (next_tb)
: "a" (gen_func)
: "ebx", "ecx", "edx", "esi", "edi", "cc",
"memory");
#elif defined(__x86_64__)
asm volatile ("sub $8, %%rsp\n\t"
"push %%rbp\n\t"
"call *%1\n\t"
"pop %%rbp\n\t"
"add $8, %%rsp\n\t"
: "=a" (next_tb)
: "a" (gen_func)
: "rbx", "rcx", "rdx", "rsi", "rdi", "r8", "r9",
"r10", "r11", "r12", "r13", "r14", "r15", "cc",
"memory");
#else
next_tb = gen_func();
#endif
next_tb = tcg_qemu_tb_exec(tc_ptr);
env->current_tb = NULL;
/* reset soft MMU for next block (it can currently
only be set by a memory fault) */

44
exec.c
View File

@ -89,6 +89,7 @@ int nb_tbs;
/* any access to the tbs or the page table must use this lock */
spinlock_t tb_lock = SPIN_LOCK_UNLOCKED;
uint8_t code_gen_prologue[1024] __attribute__((aligned (32)));
uint8_t code_gen_buffer[CODE_GEN_BUFFER_SIZE] __attribute__((aligned (32)));
uint8_t *code_gen_ptr;
@ -173,6 +174,31 @@ typedef struct subpage_t {
void *opaque[TARGET_PAGE_SIZE][2][4];
} subpage_t;
#ifdef _WIN32
static void map_exec(void *addr, long size)
{
DWORD old_protect;
VirtualProtect(addr, size,
PAGE_EXECUTE_READWRITE, &old_protect);
}
#else
static void map_exec(void *addr, long size)
{
unsigned long start, end;
start = (unsigned long)addr;
start &= ~(qemu_real_host_page_size - 1);
end = (unsigned long)addr + size;
end += qemu_real_host_page_size - 1;
end &= ~(qemu_real_host_page_size - 1);
mprotect((void *)start, end - start,
PROT_READ | PROT_WRITE | PROT_EXEC);
}
#endif
static void page_init(void)
{
/* NOTE: we can always suppose that qemu_host_page_size >=
@ -184,26 +210,12 @@ static void page_init(void)
GetSystemInfo(&system_info);
qemu_real_host_page_size = system_info.dwPageSize;
VirtualProtect(code_gen_buffer, sizeof(code_gen_buffer),
PAGE_EXECUTE_READWRITE, &old_protect);
}
#else
qemu_real_host_page_size = getpagesize();
{
unsigned long start, end;
start = (unsigned long)code_gen_buffer;
start &= ~(qemu_real_host_page_size - 1);
end = (unsigned long)code_gen_buffer + sizeof(code_gen_buffer);
end += qemu_real_host_page_size - 1;
end &= ~(qemu_real_host_page_size - 1);
mprotect((void *)start, end - start,
PROT_READ | PROT_WRITE | PROT_EXEC);
}
#endif
map_exec(code_gen_buffer, sizeof(code_gen_buffer));
map_exec(code_gen_prologue, sizeof(code_gen_prologue));
if (qemu_host_page_size == 0)
qemu_host_page_size = qemu_real_host_page_size;