Commit 58fe2f10 authored by bellard's avatar bellard

experimental code copy support


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@623 c046a42c-6fe2-441c-8c8c-71466251a162
parent 3a1d9b8b
......@@ -79,7 +79,13 @@ void dump_ops(const uint16_t *opc_buf, const uint32_t *opparam_buf);
int cpu_gen_code(CPUState *env, struct TranslationBlock *tb,
int max_code_size, int *gen_code_size_ptr);
int cpu_restore_state(struct TranslationBlock *tb,
CPUState *env, unsigned long searched_pc);
CPUState *env, unsigned long searched_pc,
void *puc);
int cpu_gen_code_copy(CPUState *env, struct TranslationBlock *tb,
int max_code_size, int *gen_code_size_ptr);
int cpu_restore_state_copy(struct TranslationBlock *tb,
CPUState *env, unsigned long searched_pc,
void *puc);
void cpu_exec_init(void);
int page_unprotect(unsigned long address);
void tb_invalidate_page_range(target_ulong start, target_ulong end);
......@@ -145,6 +151,9 @@ typedef struct TranslationBlock {
unsigned int flags; /* flags defining in which context the code was generated */
uint16_t size; /* size of target code for this block (1 <=
size <= TARGET_PAGE_SIZE) */
uint16_t cflags; /* compile flags */
#define CF_CODE_COPY 0x0001 /* block was generated in code copy mode */
uint8_t *tc_ptr; /* pointer to the translated code */
struct TranslationBlock *hash_next; /* next matching tb for virtual address */
/* next matching tb for physical address. */
......@@ -552,4 +561,3 @@ static inline target_ulong get_phys_addr_code(CPUState *env, target_ulong addr)
return addr + env->tlb_read[is_user][index].addend - (unsigned long)phys_ram_base;
}
#endif
......@@ -378,7 +378,11 @@ 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 (host_signum == SIGSEGV || host_signum == SIGBUS
#if defined(TARGET_I386) && defined(USE_CODE_COPY)
|| host_signum == SIGFPE
#endif
) {
if (cpu_signal_handler(host_signum, info, puc))
return;
}
......
......@@ -24,6 +24,10 @@
#include "cpu-defs.h"
#if defined(__i386__) && !defined(CONFIG_SOFTMMU)
#define USE_CODE_COPY
#endif
#define R_EAX 0
#define R_ECX 1
#define R_EDX 2
......@@ -121,6 +125,7 @@
#define HF_SS32_MASK (1 << HF_SS32_SHIFT)
#define HF_ADDSEG_MASK (1 << HF_ADDSEG_SHIFT)
#define HF_PE_MASK (1 << HF_PE_SHIFT)
#define HF_TF_MASK (1 << HF_TF_SHIFT)
#define CR0_PE_MASK (1 << 0)
#define CR0_TS_MASK (1 << 3)
......@@ -297,6 +302,10 @@ typedef struct CPUX86State {
uint32_t sysenter_cs;
uint32_t sysenter_esp;
uint32_t sysenter_eip;
/* temporary data for USE_CODE_COPY mode */
uint32_t tmp0;
uint32_t saved_esp;
/* exception/interrupt handling */
jmp_buf jmp_env;
......
......@@ -869,7 +869,7 @@ void do_interrupt(int intno, int is_int, int error_code,
{
extern FILE *stdout;
static int count;
if (env->cr[0] & CR0_PE_MASK) {
if (env->cr[0] & CR0_PE_MASK) {
fprintf(stdout, "%d: v=%02x e=%04x i=%d CPL=%d CS:EIP=%04x:%08x SS:ESP=%04x:%08x",
count, intno, error_code, is_int,
env->hflags & HF_CPL_MASK,
......@@ -2489,7 +2489,7 @@ void tlb_fill(unsigned long addr, int is_write, int is_user, void *retaddr)
if (tb) {
/* the PC is inside the translated code. It means that we have
a virtual CPU fault */
cpu_restore_state(tb, env, pc);
cpu_restore_state(tb, env, pc, NULL);
}
}
raise_exception_err(EXCP0E_PAGE, env->error_code);
......
This diff is collapsed.
......@@ -48,6 +48,8 @@ uint8_t gen_opc_instr_start[OPC_BUF_SIZE];
uint8_t gen_opc_cc_op[OPC_BUF_SIZE];
#endif
int code_copy_enabled = 1;
#ifdef DEBUG_DISAS
static const char *op_str[] = {
#define DEF(s, n, copy_size) #s,
......@@ -98,30 +100,38 @@ int cpu_gen_code(CPUState *env, TranslationBlock *tb,
uint8_t *gen_code_buf;
int gen_code_size;
if (gen_intermediate_code(env, tb) < 0)
return -1;
#ifdef USE_CODE_COPY
if (code_copy_enabled &&
cpu_gen_code_copy(env, tb, max_code_size, &gen_code_size) == 0) {
/* nothing more to do */
} else
#endif
{
if (gen_intermediate_code(env, tb) < 0)
return -1;
/* generate machine code */
tb->tb_next_offset[0] = 0xffff;
tb->tb_next_offset[1] = 0xffff;
gen_code_buf = tb->tc_ptr;
/* generate machine code */
tb->tb_next_offset[0] = 0xffff;
tb->tb_next_offset[1] = 0xffff;
gen_code_buf = tb->tc_ptr;
#ifdef USE_DIRECT_JUMP
/* the following two entries are optional (only used for string ops) */
tb->tb_jmp_offset[2] = 0xffff;
tb->tb_jmp_offset[3] = 0xffff;
/* the following two entries are optional (only used for string ops) */
tb->tb_jmp_offset[2] = 0xffff;
tb->tb_jmp_offset[3] = 0xffff;
#endif
gen_code_size = dyngen_code(gen_code_buf, tb->tb_next_offset,
gen_code_size = dyngen_code(gen_code_buf, tb->tb_next_offset,
#ifdef USE_DIRECT_JUMP
tb->tb_jmp_offset,
tb->tb_jmp_offset,
#else
NULL,
NULL,
#endif
gen_opc_buf, gen_opparam_buf);
gen_opc_buf, gen_opparam_buf);
}
*gen_code_size_ptr = gen_code_size;
#ifdef DEBUG_DISAS
if (loglevel && 0) {
if (loglevel) {
fprintf(logfile, "OUT: [size=%d]\n", *gen_code_size_ptr);
disas(logfile, gen_code_buf, *gen_code_size_ptr, 1, 0);
disas(logfile, tb->tc_ptr, *gen_code_size_ptr, 1, 0);
fprintf(logfile, "\n");
fflush(logfile);
}
......@@ -138,12 +148,18 @@ static const unsigned short opc_copy_size[] = {
/* The cpu state corresponding to 'searched_pc' is restored.
*/
int cpu_restore_state(TranslationBlock *tb,
CPUState *env, unsigned long searched_pc)
CPUState *env, unsigned long searched_pc,
void *puc)
{
int j, c;
unsigned long tc_ptr;
uint16_t *opc_ptr;
#ifdef USE_CODE_COPY
if (tb->cflags & CF_CODE_COPY) {
return cpu_restore_state_copy(tb, env, searched_pc, puc);
}
#endif
if (gen_intermediate_code_pc(env, tb) < 0)
return -1;
......@@ -190,6 +206,7 @@ int cpu_restore_state(TranslationBlock *tb,
#elif defined(TARGET_ARM)
env->regs[15] = gen_opc_pc[j];
#elif defined(TARGET_SPARC)
/* XXX: restore npc too */
env->pc = gen_opc_pc[j];
#elif defined(TARGET_PPC)
{
......
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