*/
#include "config.h"
#include "cpu.h"
-#include "disas.h"
+#include "disas/disas.h"
#include "tcg.h"
-#include "qemu-barrier.h"
-#include "qtest.h"
-
-int tb_invalidated_flag;
+#include "qemu/atomic.h"
+#include "sysemu/qtest.h"
//#define CONFIG_DEBUG_EXEC
-bool qemu_cpu_has_work(CPUArchState *env)
+bool qemu_cpu_has_work(CPUState *cpu)
{
- return cpu_has_work(env);
+ return cpu_has_work(cpu);
}
void cpu_loop_exit(CPUArchState *env)
{
- env->current_tb = NULL;
- longjmp(env->jmp_env, 1);
+ CPUState *cpu = ENV_GET_CPU(env);
+
+ cpu->current_tb = NULL;
+ siglongjmp(env->jmp_env, 1);
}
/* exit the current TB from a signal handler. The host registers are
/* XXX: restore cpu registers saved in host registers */
env->exception_index = -1;
- longjmp(env->jmp_env, 1);
+ siglongjmp(env->jmp_env, 1);
}
#endif
+/* Execute a TB, and fix up the CPU state afterwards if necessary */
+static inline tcg_target_ulong cpu_tb_exec(CPUState *cpu, uint8_t *tb_ptr)
+{
+ CPUArchState *env = cpu->env_ptr;
+ tcg_target_ulong next_tb = tcg_qemu_tb_exec(env, tb_ptr);
+ if ((next_tb & TB_EXIT_MASK) > TB_EXIT_IDX1) {
+ /* We didn't start executing this TB (eg because the instruction
+ * counter hit zero); we must restore the guest PC to the address
+ * of the start of the TB.
+ */
+ TranslationBlock *tb = (TranslationBlock *)(next_tb & ~TB_EXIT_MASK);
+ cpu_pc_from_tb(env, tb);
+ }
+ if ((next_tb & TB_EXIT_MASK) == TB_EXIT_REQUESTED) {
+ /* We were asked to stop executing TBs (probably a pending
+ * interrupt. We've now stopped, so clear the flag.
+ */
+ cpu->tcg_exit_req = 0;
+ }
+ return next_tb;
+}
+
/* Execute the code without caching the generated code. An interpreter
could be used if available. */
static void cpu_exec_nocache(CPUArchState *env, int max_cycles,
TranslationBlock *orig_tb)
{
- tcg_target_ulong next_tb;
+ CPUState *cpu = ENV_GET_CPU(env);
TranslationBlock *tb;
/* Should never happen.
tb = tb_gen_code(env, orig_tb->pc, orig_tb->cs_base, orig_tb->flags,
max_cycles);
- env->current_tb = tb;
+ cpu->current_tb = tb;
/* execute the generated code */
- next_tb = tcg_qemu_tb_exec(env, tb->tc_ptr);
- env->current_tb = NULL;
-
- if ((next_tb & 3) == 2) {
- /* Restore PC. This may happen if async event occurs before
- the TB starts executing. */
- cpu_pc_from_tb(env, tb);
- }
+ cpu_tb_exec(cpu, tb->tc_ptr);
+ cpu->current_tb = NULL;
tb_phys_invalidate(tb, -1);
tb_free(tb);
}
tb_page_addr_t phys_pc, phys_page1;
target_ulong virt_page2;
- tb_invalidated_flag = 0;
+ tcg_ctx.tb_ctx.tb_invalidated_flag = 0;
/* find translated block using physical mappings */
phys_pc = get_page_addr_code(env, pc);
phys_page1 = phys_pc & TARGET_PAGE_MASK;
h = tb_phys_hash_func(phys_pc);
- ptb1 = &tb_phys_hash[h];
+ ptb1 = &tcg_ctx.tb_ctx.tb_phys_hash[h];
for(;;) {
tb = *ptb1;
if (!tb)
/* Move the last found TB to the head of the list */
if (likely(*ptb1)) {
*ptb1 = tb->phys_hash_next;
- tb->phys_hash_next = tb_phys_hash[h];
- tb_phys_hash[h] = tb;
+ tb->phys_hash_next = tcg_ctx.tb_ctx.tb_phys_hash[h];
+ tcg_ctx.tb_ctx.tb_phys_hash[h] = tb;
}
/* we add the TB in the virtual pc hash table */
env->tb_jmp_cache[tb_jmp_cache_hash_func(pc)] = tb;
static CPUDebugExcpHandler *debug_excp_handler;
-CPUDebugExcpHandler *cpu_set_debug_excp_handler(CPUDebugExcpHandler *handler)
+void cpu_set_debug_excp_handler(CPUDebugExcpHandler *handler)
{
- CPUDebugExcpHandler *old_handler = debug_excp_handler;
-
debug_excp_handler = handler;
- return old_handler;
}
static void cpu_handle_debug_exception(CPUArchState *env)
int cpu_exec(CPUArchState *env)
{
-#ifdef TARGET_PPC
CPUState *cpu = ENV_GET_CPU(env);
-#endif
int ret, interrupt_request;
TranslationBlock *tb;
uint8_t *tc_ptr;
tcg_target_ulong next_tb;
if (env->halted) {
- if (!cpu_has_work(env)) {
+ if (!cpu_has_work(cpu)) {
return EXCP_HALTED;
}
cpu_single_env = env;
if (unlikely(exit_request)) {
- env->exit_request = 1;
+ cpu->exit_request = 1;
}
#if defined(TARGET_I386)
/* prepare setjmp context for exception handling */
for(;;) {
- if (setjmp(env->jmp_env) == 0) {
+ if (sigsetjmp(env->jmp_env, 0) == 0) {
/* if an exception is pending, we execute it here */
if (env->exception_index >= 0) {
if (env->exception_index >= EXCP_INTERRUPT) {
#elif defined(TARGET_UNICORE32)
if (interrupt_request & CPU_INTERRUPT_HARD
&& !(env->uncached_asr & ASR_I)) {
+ env->exception_index = UC32_EXCP_INTR;
do_interrupt(env);
next_tb = 0;
}
next_tb = 0;
}
}
- if (unlikely(env->exit_request)) {
- env->exit_request = 0;
+ if (unlikely(cpu->exit_request)) {
+ cpu->exit_request = 0;
env->exception_index = EXCP_INTERRUPT;
cpu_loop_exit(env);
}
#if defined(TARGET_I386)
env->eflags = env->eflags | cpu_cc_compute_all(env, CC_OP)
| (DF & DF_MASK);
- log_cpu_state(env, X86_DUMP_CCOP);
+ log_cpu_state(env, CPU_DUMP_CCOP);
env->eflags &= ~(DF_MASK | CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C);
#elif defined(TARGET_M68K)
cpu_m68k_flush_flags(env, env->cc_op);
#endif
}
#endif /* DEBUG_DISAS || CONFIG_DEBUG_EXEC */
- spin_lock(&tb_lock);
+ spin_lock(&tcg_ctx.tb_ctx.tb_lock);
tb = tb_find_fast(env);
/* Note: we do it here to avoid a gcc bug on Mac OS X when
doing it in tb_find_slow */
- if (tb_invalidated_flag) {
+ if (tcg_ctx.tb_ctx.tb_invalidated_flag) {
/* as some TB could have been invalidated because
of memory exceptions while generating the code, we
must recompute the hash index here */
next_tb = 0;
- tb_invalidated_flag = 0;
+ tcg_ctx.tb_ctx.tb_invalidated_flag = 0;
}
#ifdef CONFIG_DEBUG_EXEC
qemu_log_mask(CPU_LOG_EXEC, "Trace %p [" TARGET_FMT_lx "] %s\n",
spans two pages, we cannot safely do a direct
jump. */
if (next_tb != 0 && tb->page_addr[1] == -1) {
- tb_add_jump((TranslationBlock *)(next_tb & ~3), next_tb & 3, tb);
+ tb_add_jump((TranslationBlock *)(next_tb & ~TB_EXIT_MASK),
+ next_tb & TB_EXIT_MASK, tb);
}
- spin_unlock(&tb_lock);
+ spin_unlock(&tcg_ctx.tb_ctx.tb_lock);
/* cpu_interrupt might be called while translating the
TB, but before it is linked into a potentially
infinite loop and becomes env->current_tb. Avoid
starting execution if there is a pending interrupt. */
- env->current_tb = tb;
+ cpu->current_tb = tb;
barrier();
- if (likely(!env->exit_request)) {
+ if (likely(!cpu->exit_request)) {
tc_ptr = tb->tc_ptr;
/* execute the generated code */
- next_tb = tcg_qemu_tb_exec(env, tc_ptr);
- if ((next_tb & 3) == 2) {
+ next_tb = cpu_tb_exec(cpu, tc_ptr);
+ switch (next_tb & TB_EXIT_MASK) {
+ case TB_EXIT_REQUESTED:
+ /* Something asked us to stop executing
+ * chained TBs; just continue round the main
+ * loop. Whatever requested the exit will also
+ * have set something else (eg exit_request or
+ * interrupt_request) which we will handle
+ * next time around the loop.
+ */
+ tb = (TranslationBlock *)(next_tb & ~TB_EXIT_MASK);
+ next_tb = 0;
+ break;
+ case TB_EXIT_ICOUNT_EXPIRED:
+ {
/* Instruction counter expired. */
int insns_left;
- tb = (TranslationBlock *)(next_tb & ~3);
- /* Restore PC. */
- cpu_pc_from_tb(env, tb);
+ tb = (TranslationBlock *)(next_tb & ~TB_EXIT_MASK);
insns_left = env->icount_decr.u32;
if (env->icount_extra && insns_left >= 0) {
/* Refill decrementer and continue execution. */
next_tb = 0;
cpu_loop_exit(env);
}
+ break;
+ }
+ default:
+ break;
}
}
- env->current_tb = NULL;
+ cpu->current_tb = NULL;
/* reset soft MMU for next block (it can currently
only be set by a memory fault) */
} /* for(;;) */
projects / qemu.git / blobdiff