*/
#include "config.h"
#include "cpu.h"
-#include "disas.h"
+#include "disas/disas.h"
#include "tcg.h"
-#include "qemu-barrier.h"
-#include "qtest.h"
+#include "qemu/atomic.h"
+#include "sysemu/qtest.h"
-int tb_invalidated_flag;
-
-//#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;
+ uintptr_t 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.
+ */
+ CPUClass *cc = CPU_GET_CLASS(cpu);
+ TranslationBlock *tb = (TranslationBlock *)(next_tb & ~TB_EXIT_MASK);
+ if (cc->synchronize_from_tb) {
+ cc->synchronize_from_tb(cpu, tb);
+ } else {
+ assert(cc->set_pc);
+ cc->set_pc(cpu, tb->pc);
+ }
+ }
+ 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;
int cpu_exec(CPUArchState *env)
{
-#ifdef TARGET_PPC
CPUState *cpu = ENV_GET_CPU(env);
+#if !(defined(CONFIG_USER_ONLY) && \
+ (defined(TARGET_M68K) || defined(TARGET_PPC) || defined(TARGET_S390X)))
+ CPUClass *cc = CPU_GET_CLASS(cpu);
#endif
int ret, interrupt_request;
TranslationBlock *tb;
uint8_t *tc_ptr;
- tcg_target_ulong next_tb;
+ uintptr_t next_tb;
- if (env->halted) {
- if (!cpu_has_work(env)) {
+ if (cpu->halted) {
+ if (!cpu_has_work(cpu)) {
return EXCP_HALTED;
}
- env->halted = 0;
+ cpu->halted = 0;
}
- cpu_single_env = env;
+ current_cpu = cpu;
+
+ /* As long as current_cpu is null, up to the assignment just above,
+ * requests by other threads to exit the execution loop are expected to
+ * be issued using the exit_request global. We must make sure that our
+ * evaluation of the global value is performed past the current_cpu
+ * value transition point, which requires a memory barrier as well as
+ * an instruction scheduling constraint on modern architectures. */
+ smp_mb();
if (unlikely(exit_request)) {
- env->exit_request = 1;
+ cpu->exit_request = 1;
}
#if defined(TARGET_I386)
/* put eflags in CPU temporary format */
CC_SRC = env->eflags & (CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C);
- DF = 1 - (2 * ((env->eflags >> 10) & 1));
+ env->df = 1 - (2 * ((env->eflags >> 10) & 1));
CC_OP = CC_OP_EFLAGS;
env->eflags &= ~(DF_MASK | CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C);
#elif defined(TARGET_SPARC)
#elif defined(TARGET_LM32)
#elif defined(TARGET_MICROBLAZE)
#elif defined(TARGET_MIPS)
+#elif defined(TARGET_MOXIE)
#elif defined(TARGET_OPENRISC)
#elif defined(TARGET_SH4)
#elif defined(TARGET_CRIS)
/* 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) {
which will be handled outside the cpu execution
loop */
#if defined(TARGET_I386)
- do_interrupt(env);
+ cc->do_interrupt(cpu);
#endif
ret = env->exception_index;
break;
#else
- do_interrupt(env);
+ cc->do_interrupt(cpu);
env->exception_index = -1;
#endif
}
next_tb = 0; /* force lookup of first TB */
for(;;) {
- interrupt_request = env->interrupt_request;
+ interrupt_request = cpu->interrupt_request;
if (unlikely(interrupt_request)) {
- if (unlikely(env->singlestep_enabled & SSTEP_NOIRQ)) {
+ if (unlikely(cpu->singlestep_enabled & SSTEP_NOIRQ)) {
/* Mask out external interrupts for this step. */
interrupt_request &= ~CPU_INTERRUPT_SSTEP_MASK;
}
if (interrupt_request & CPU_INTERRUPT_DEBUG) {
- env->interrupt_request &= ~CPU_INTERRUPT_DEBUG;
+ cpu->interrupt_request &= ~CPU_INTERRUPT_DEBUG;
env->exception_index = EXCP_DEBUG;
cpu_loop_exit(env);
}
defined(TARGET_PPC) || defined(TARGET_ALPHA) || defined(TARGET_CRIS) || \
defined(TARGET_MICROBLAZE) || defined(TARGET_LM32) || defined(TARGET_UNICORE32)
if (interrupt_request & CPU_INTERRUPT_HALT) {
- env->interrupt_request &= ~CPU_INTERRUPT_HALT;
- env->halted = 1;
+ cpu->interrupt_request &= ~CPU_INTERRUPT_HALT;
+ cpu->halted = 1;
env->exception_index = EXCP_HLT;
cpu_loop_exit(env);
}
#if defined(TARGET_I386)
#if !defined(CONFIG_USER_ONLY)
if (interrupt_request & CPU_INTERRUPT_POLL) {
- env->interrupt_request &= ~CPU_INTERRUPT_POLL;
+ cpu->interrupt_request &= ~CPU_INTERRUPT_POLL;
apic_poll_irq(env->apic_state);
}
#endif
!(env->hflags & HF_SMM_MASK)) {
cpu_svm_check_intercept_param(env, SVM_EXIT_SMI,
0);
- env->interrupt_request &= ~CPU_INTERRUPT_SMI;
- do_smm_enter(env);
+ cpu->interrupt_request &= ~CPU_INTERRUPT_SMI;
+ do_smm_enter(x86_env_get_cpu(env));
next_tb = 0;
} else if ((interrupt_request & CPU_INTERRUPT_NMI) &&
!(env->hflags2 & HF2_NMI_MASK)) {
- env->interrupt_request &= ~CPU_INTERRUPT_NMI;
+ cpu->interrupt_request &= ~CPU_INTERRUPT_NMI;
env->hflags2 |= HF2_NMI_MASK;
do_interrupt_x86_hardirq(env, EXCP02_NMI, 1);
next_tb = 0;
} else if (interrupt_request & CPU_INTERRUPT_MCE) {
- env->interrupt_request &= ~CPU_INTERRUPT_MCE;
+ cpu->interrupt_request &= ~CPU_INTERRUPT_MCE;
do_interrupt_x86_hardirq(env, EXCP12_MCHK, 0);
next_tb = 0;
} else if ((interrupt_request & CPU_INTERRUPT_HARD) &&
int intno;
cpu_svm_check_intercept_param(env, SVM_EXIT_INTR,
0);
- env->interrupt_request &= ~(CPU_INTERRUPT_HARD | CPU_INTERRUPT_VIRQ);
+ cpu->interrupt_request &= ~(CPU_INTERRUPT_HARD |
+ CPU_INTERRUPT_VIRQ);
intno = cpu_get_pic_interrupt(env);
- if (intno >= 0) {
- qemu_log_mask(CPU_LOG_TB_IN_ASM,
- "Servicing hardware INT=0x%02x\n",
- intno);
- do_interrupt_x86_hardirq(env, intno, 1);
- /* ensure that no TB jump will be modified as
- the program flow was changed */
- next_tb = 0;
- }
+ qemu_log_mask(CPU_LOG_TB_IN_ASM, "Servicing hardware INT=0x%02x\n", intno);
+ do_interrupt_x86_hardirq(env, intno, 1);
+ /* ensure that no TB jump will be modified as
+ the program flow was changed */
+ next_tb = 0;
#if !defined(CONFIG_USER_ONLY)
} else if ((interrupt_request & CPU_INTERRUPT_VIRQ) &&
(env->eflags & IF_MASK) &&
intno = ldl_phys(env->vm_vmcb + offsetof(struct vmcb, control.int_vector));
qemu_log_mask(CPU_LOG_TB_IN_ASM, "Servicing virtual hardware INT=0x%02x\n", intno);
do_interrupt_x86_hardirq(env, intno, 1);
- env->interrupt_request &= ~CPU_INTERRUPT_VIRQ;
+ cpu->interrupt_request &= ~CPU_INTERRUPT_VIRQ;
next_tb = 0;
#endif
}
}
if (interrupt_request & CPU_INTERRUPT_HARD) {
ppc_hw_interrupt(env);
- if (env->pending_interrupts == 0)
- env->interrupt_request &= ~CPU_INTERRUPT_HARD;
+ if (env->pending_interrupts == 0) {
+ cpu->interrupt_request &= ~CPU_INTERRUPT_HARD;
+ }
next_tb = 0;
}
#elif defined(TARGET_LM32)
if ((interrupt_request & CPU_INTERRUPT_HARD)
&& (env->ie & IE_IE)) {
env->exception_index = EXCP_IRQ;
- do_interrupt(env);
+ cc->do_interrupt(cpu);
next_tb = 0;
}
#elif defined(TARGET_MICROBLAZE)
&& !(env->sregs[SR_MSR] & (MSR_EIP | MSR_BIP))
&& !(env->iflags & (D_FLAG | IMM_FLAG))) {
env->exception_index = EXCP_IRQ;
- do_interrupt(env);
+ cc->do_interrupt(cpu);
next_tb = 0;
}
#elif defined(TARGET_MIPS)
/* Raise it */
env->exception_index = EXCP_EXT_INTERRUPT;
env->error_code = 0;
- do_interrupt(env);
+ cc->do_interrupt(cpu);
next_tb = 0;
}
#elif defined(TARGET_OPENRISC)
}
if (idx >= 0) {
env->exception_index = idx;
- do_interrupt(env);
+ cc->do_interrupt(cpu);
next_tb = 0;
}
}
cpu_pil_allowed(env, pil)) ||
type != TT_EXTINT) {
env->exception_index = env->interrupt_index;
- do_interrupt(env);
+ cc->do_interrupt(cpu);
next_tb = 0;
}
}
if (interrupt_request & CPU_INTERRUPT_FIQ
&& !(env->uncached_cpsr & CPSR_F)) {
env->exception_index = EXCP_FIQ;
- do_interrupt(env);
+ cc->do_interrupt(cpu);
next_tb = 0;
}
/* ARMv7-M interrupt return works by loading a magic value
&& ((IS_M(env) && env->regs[15] < 0xfffffff0)
|| !(env->uncached_cpsr & CPSR_I))) {
env->exception_index = EXCP_IRQ;
- do_interrupt(env);
+ cc->do_interrupt(cpu);
next_tb = 0;
}
#elif defined(TARGET_UNICORE32)
if (interrupt_request & CPU_INTERRUPT_HARD
&& !(env->uncached_asr & ASR_I)) {
env->exception_index = UC32_EXCP_INTR;
- do_interrupt(env);
+ cc->do_interrupt(cpu);
next_tb = 0;
}
#elif defined(TARGET_SH4)
if (interrupt_request & CPU_INTERRUPT_HARD) {
- do_interrupt(env);
+ cc->do_interrupt(cpu);
next_tb = 0;
}
#elif defined(TARGET_ALPHA)
if (idx >= 0) {
env->exception_index = idx;
env->error_code = 0;
- do_interrupt(env);
+ cc->do_interrupt(cpu);
next_tb = 0;
}
}
&& (env->pregs[PR_CCS] & I_FLAG)
&& !env->locked_irq) {
env->exception_index = EXCP_IRQ;
- do_interrupt(env);
+ cc->do_interrupt(cpu);
next_tb = 0;
}
if (interrupt_request & CPU_INTERRUPT_NMI) {
}
if ((env->pregs[PR_CCS] & m_flag_archval)) {
env->exception_index = EXCP_NMI;
- do_interrupt(env);
+ cc->do_interrupt(cpu);
next_tb = 0;
}
}
#elif defined(TARGET_S390X) && !defined(CONFIG_USER_ONLY)
if ((interrupt_request & CPU_INTERRUPT_HARD) &&
(env->psw.mask & PSW_MASK_EXT)) {
- do_interrupt(env);
+ cc->do_interrupt(cpu);
next_tb = 0;
}
#elif defined(TARGET_XTENSA)
if (interrupt_request & CPU_INTERRUPT_HARD) {
env->exception_index = EXC_IRQ;
- do_interrupt(env);
+ cc->do_interrupt(cpu);
next_tb = 0;
}
#endif
/* Don't use the cached interrupt_request value,
do_interrupt may have updated the EXITTB flag. */
- if (env->interrupt_request & CPU_INTERRUPT_EXITTB) {
- env->interrupt_request &= ~CPU_INTERRUPT_EXITTB;
+ if (cpu->interrupt_request & CPU_INTERRUPT_EXITTB) {
+ cpu->interrupt_request &= ~CPU_INTERRUPT_EXITTB;
/* ensure that no TB jump will be modified as
the program flow was changed */
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(DEBUG_DISAS) || defined(CONFIG_DEBUG_EXEC)
+#if defined(DEBUG_DISAS)
if (qemu_loglevel_mask(CPU_LOG_TB_CPU)) {
/* restore flags in standard format */
#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);
- env->eflags &= ~(DF_MASK | CC_O | CC_S | CC_Z | CC_A | CC_P | CC_C);
+ log_cpu_state(cpu, CPU_DUMP_CCOP);
#elif defined(TARGET_M68K)
cpu_m68k_flush_flags(env, env->cc_op);
env->cc_op = CC_OP_FLAGS;
env->sr = (env->sr & 0xffe0)
| env->cc_dest | (env->cc_x << 4);
- log_cpu_state(env, 0);
+ log_cpu_state(cpu, 0);
#else
- log_cpu_state(env, 0);
+ log_cpu_state(cpu, 0);
#endif
}
-#endif /* DEBUG_DISAS || CONFIG_DEBUG_EXEC */
- spin_lock(&tb_lock);
+#endif /* DEBUG_DISAS */
+ 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;
+ }
+ if (qemu_loglevel_mask(CPU_LOG_EXEC)) {
+ qemu_log("Trace %p [" TARGET_FMT_lx "] %s\n",
+ tb->tc_ptr, tb->pc, lookup_symbol(tb->pc));
}
-#ifdef CONFIG_DEBUG_EXEC
- qemu_log_mask(CPU_LOG_EXEC, "Trace %p [" TARGET_FMT_lx "] %s\n",
- tb->tc_ptr, tb->pc,
- lookup_symbol(tb->pc));
-#endif
/* see if we can patch the calling TB. When the TB
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(;;) */
} else {
/* Reload env after longjmp - the compiler may have smashed all
* local variables as longjmp is marked 'noreturn'. */
- env = cpu_single_env;
+ cpu = current_cpu;
+ env = cpu->env_ptr;
+#if !(defined(CONFIG_USER_ONLY) && \
+ (defined(TARGET_M68K) || defined(TARGET_PPC) || defined(TARGET_S390X)))
+ cc = CPU_GET_CLASS(cpu);
+#endif
}
} /* for(;;) */
#if defined(TARGET_I386)
/* restore flags in standard format */
env->eflags = env->eflags | cpu_cc_compute_all(env, CC_OP)
- | (DF & DF_MASK);
+ | (env->df & DF_MASK);
#elif defined(TARGET_ARM)
/* XXX: Save/restore host fpu exception state?. */
#elif defined(TARGET_UNICORE32)
| env->cc_dest | (env->cc_x << 4);
#elif defined(TARGET_MICROBLAZE)
#elif defined(TARGET_MIPS)
+#elif defined(TARGET_MOXIE)
#elif defined(TARGET_OPENRISC)
#elif defined(TARGET_SH4)
#elif defined(TARGET_ALPHA)
#error unsupported target CPU
#endif
- /* fail safe : never use cpu_single_env outside cpu_exec() */
- cpu_single_env = NULL;
+ /* fail safe : never use current_cpu outside cpu_exec() */
+ current_cpu = NULL;
return ret;
}
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