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cleanup cpu-exec.c, part 0/N: consolidate handle_cpu_signal

Browse source 
handle_cpu_signal is very nearly copy-paste code for each target, with a
few minor variations.  This patch sets up appropriate defaults for a
generic handle_cpu_signal and provides overrides for particular targets
that did things differently.  Fixing things like the persistent (XXX:
use sigsetjmp) should now become somewhat easier.

Previous comments on this patch suggest that the "activate soft MMU for
this block" comments refer to defunct functionality.  I have removed
such blocks for the appropriate targets in this patch.

Signed-off-by: Nathan Froyd <froydnj@codesourcery.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Nathan Froyd 2009-08-10 13:37:36 -07:00 committed by Anthony Liguori
parent 7f79dd281c
commit 0b5c1ce846
11 changed files with 17 additions and 410 deletions
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417
cpu-exec.c
View file

@ -746,6 +746,10 @@ void cpu_x86_frstor(CPUX86State *s, target_ulong ptr, int data32)
#if !defined(CONFIG_SOFTMMU)
#if defined(TARGET_I386)
#define EXCEPTION_ACTION raise_exception_err(env->exception_index, env->error_code)
#else
#define EXCEPTION_ACTION cpu_loop_exit()
#endif
/* 'pc' is the host PC at which the exception was raised. 'address' is
the effective address of the memory exception. 'is_write' is 1 if a
@ -770,7 +774,7 @@ static inline int handle_cpu_signal(unsigned long pc, unsigned long address,
}
/* see if it is an MMU fault */
ret = cpu_x86_handle_mmu_fault(env, address, is_write, MMU_USER_IDX, 0);
ret = cpu_handle_mmu_fault(env, address, is_write, MMU_USER_IDX, 0);
if (ret < 0)
return 0; /* not an MMU fault */
if (ret == 0)
@ -782,422 +786,15 @@ static inline int handle_cpu_signal(unsigned long pc, unsigned long address,
a virtual CPU fault */
cpu_restore_state(tb, env, pc, puc);
}
if (ret == 1) {
#if 0
printf("PF exception: EIP=0x%08x CR2=0x%08x error=0x%x\n",
env->eip, env->cr[2], env->error_code);
#endif
/* we restore the process signal mask as the sigreturn should
do it (XXX: use sigsetjmp) */
sigprocmask(SIG_SETMASK, old_set, NULL);
raise_exception_err(env->exception_index, env->error_code);
} else {
/* activate soft MMU for this block */
env->hflags |= HF_SOFTMMU_MASK;
cpu_resume_from_signal(env, puc);
}
/* never comes here */
return 1;
}
#elif defined(TARGET_ARM)
static inline int handle_cpu_signal(unsigned long pc, unsigned long address,
int is_write, sigset_t *old_set,
void *puc)
{
TranslationBlock *tb;
int ret;
if (cpu_single_env)
env = cpu_single_env; /* XXX: find a correct solution for multithread */
#if defined(DEBUG_SIGNAL)
printf("qemu: SIGSEGV pc=0x%08lx address=%08lx w=%d oldset=0x%08lx\n",
pc, address, is_write, *(unsigned long *)old_set);
#endif
/* XXX: locking issue */
if (is_write && page_unprotect(h2g(address), pc, puc)) {
return 1;
}
/* see if it is an MMU fault */
ret = cpu_arm_handle_mmu_fault(env, address, is_write, MMU_USER_IDX, 0);
if (ret < 0)
return 0; /* not an MMU fault */
if (ret == 0)
return 1; /* the MMU fault was handled without causing real CPU fault */
/* now we have a real cpu fault */
tb = tb_find_pc(pc);
if (tb) {
/* the PC is inside the translated code. It means that we have
a virtual CPU fault */
cpu_restore_state(tb, env, pc, puc);
}
/* we restore the process signal mask as the sigreturn should
do it (XXX: use sigsetjmp) */
sigprocmask(SIG_SETMASK, old_set, NULL);
cpu_loop_exit();
EXCEPTION_ACTION;
/* never comes here */
return 1;
}
#elif defined(TARGET_SPARC)
static inline int handle_cpu_signal(unsigned long pc, unsigned long address,
int is_write, sigset_t *old_set,
void *puc)
{
TranslationBlock *tb;
int ret;
if (cpu_single_env)
env = cpu_single_env; /* XXX: find a correct solution for multithread */
#if defined(DEBUG_SIGNAL)
printf("qemu: SIGSEGV pc=0x%08lx address=%08lx w=%d oldset=0x%08lx\n",
pc, address, is_write, *(unsigned long *)old_set);
#endif
/* XXX: locking issue */
if (is_write && page_unprotect(h2g(address), pc, puc)) {
return 1;
}
/* see if it is an MMU fault */
ret = cpu_sparc_handle_mmu_fault(env, address, is_write, MMU_USER_IDX, 0);
if (ret < 0)
return 0; /* not an MMU fault */
if (ret == 0)
return 1; /* the MMU fault was handled without causing real CPU fault */
/* now we have a real cpu fault */
tb = tb_find_pc(pc);
if (tb) {
/* the PC is inside the translated code. It means that we have
a virtual CPU fault */
cpu_restore_state(tb, env, pc, puc);
}
/* we restore the process signal mask as the sigreturn should
do it (XXX: use sigsetjmp) */
sigprocmask(SIG_SETMASK, old_set, NULL);
cpu_loop_exit();
/* never comes here */
return 1;
}
#elif defined (TARGET_PPC)
static inline int handle_cpu_signal(unsigned long pc, unsigned long address,
int is_write, sigset_t *old_set,
void *puc)
{
TranslationBlock *tb;
int ret;
if (cpu_single_env)
env = cpu_single_env; /* XXX: find a correct solution for multithread */
#if defined(DEBUG_SIGNAL)
printf("qemu: SIGSEGV pc=0x%08lx address=%08lx w=%d oldset=0x%08lx\n",
pc, address, is_write, *(unsigned long *)old_set);
#endif
/* XXX: locking issue */
if (is_write && page_unprotect(h2g(address), pc, puc)) {
return 1;
}
/* see if it is an MMU fault */
ret = cpu_ppc_handle_mmu_fault(env, address, is_write, MMU_USER_IDX, 0);
if (ret < 0)
return 0; /* not an MMU fault */
if (ret == 0)
return 1; /* the MMU fault was handled without causing real CPU fault */
/* now we have a real cpu fault */
tb = tb_find_pc(pc);
if (tb) {
/* the PC is inside the translated code. It means that we have
a virtual CPU fault */
cpu_restore_state(tb, env, pc, puc);
}
if (ret == 1) {
#if 0
printf("PF exception: NIP=0x%08x error=0x%x %p\n",
env->nip, env->error_code, tb);
#endif
/* we restore the process signal mask as the sigreturn should
do it (XXX: use sigsetjmp) */
sigprocmask(SIG_SETMASK, old_set, NULL);
cpu_loop_exit();
} else {
/* activate soft MMU for this block */
cpu_resume_from_signal(env, puc);
}
/* never comes here */
return 1;
}
#elif defined(TARGET_M68K)
static inline int handle_cpu_signal(unsigned long pc, unsigned long address,
int is_write, sigset_t *old_set,
void *puc)
{
TranslationBlock *tb;
int ret;
if (cpu_single_env)
env = cpu_single_env; /* XXX: find a correct solution for multithread */
#if defined(DEBUG_SIGNAL)
printf("qemu: SIGSEGV pc=0x%08lx address=%08lx w=%d oldset=0x%08lx\n",
pc, address, is_write, *(unsigned long *)old_set);
#endif
/* XXX: locking issue */
if (is_write && page_unprotect(address, pc, puc)) {
return 1;
}
/* see if it is an MMU fault */
ret = cpu_m68k_handle_mmu_fault(env, address, is_write, MMU_USER_IDX, 0);
if (ret < 0)
return 0; /* not an MMU fault */
if (ret == 0)
return 1; /* the MMU fault was handled without causing real CPU fault */
/* now we have a real cpu fault */
tb = tb_find_pc(pc);
if (tb) {
/* the PC is inside the translated code. It means that we have
a virtual CPU fault */
cpu_restore_state(tb, env, pc, puc);
}
/* we restore the process signal mask as the sigreturn should
do it (XXX: use sigsetjmp) */
sigprocmask(SIG_SETMASK, old_set, NULL);
cpu_loop_exit();
/* never comes here */
return 1;
}
#elif defined (TARGET_MIPS)
static inline int handle_cpu_signal(unsigned long pc, unsigned long address,
int is_write, sigset_t *old_set,
void *puc)
{
TranslationBlock *tb;
int ret;
if (cpu_single_env)
env = cpu_single_env; /* XXX: find a correct solution for multithread */
#if defined(DEBUG_SIGNAL)
printf("qemu: SIGSEGV pc=0x%08lx address=%08lx w=%d oldset=0x%08lx\n",
pc, address, is_write, *(unsigned long *)old_set);
#endif
/* XXX: locking issue */
if (is_write && page_unprotect(h2g(address), pc, puc)) {
return 1;
}
/* see if it is an MMU fault */
ret = cpu_mips_handle_mmu_fault(env, address, is_write, MMU_USER_IDX, 0);
if (ret < 0)
return 0; /* not an MMU fault */
if (ret == 0)
return 1; /* the MMU fault was handled without causing real CPU fault */
/* now we have a real cpu fault */
tb = tb_find_pc(pc);
if (tb) {
/* the PC is inside the translated code. It means that we have
a virtual CPU fault */
cpu_restore_state(tb, env, pc, puc);
}
if (ret == 1) {
#if 0
printf("PF exception: PC=0x" TARGET_FMT_lx " error=0x%x %p\n",
env->PC, env->error_code, tb);
#endif
/* we restore the process signal mask as the sigreturn should
do it (XXX: use sigsetjmp) */
sigprocmask(SIG_SETMASK, old_set, NULL);
cpu_loop_exit();
} else {
/* activate soft MMU for this block */
cpu_resume_from_signal(env, puc);
}
/* never comes here */
return 1;
}
#elif defined (TARGET_MICROBLAZE)
static inline int handle_cpu_signal(unsigned long pc, unsigned long address,
int is_write, sigset_t *old_set,
void *puc)
{
TranslationBlock *tb;
int ret;
if (cpu_single_env)
env = cpu_single_env; /* XXX: find a correct solution for multithread */
#if defined(DEBUG_SIGNAL)
printf("qemu: SIGSEGV pc=0x%08lx address=%08lx w=%d oldset=0x%08lx\n",
pc, address, is_write, *(unsigned long *)old_set);
#endif
/* XXX: locking issue */
if (is_write && page_unprotect(h2g(address), pc, puc)) {
return 1;
}
/* see if it is an MMU fault */
ret = cpu_mb_handle_mmu_fault(env, address, is_write, MMU_USER_IDX, 0);
if (ret < 0)
return 0; /* not an MMU fault */
if (ret == 0)
return 1; /* the MMU fault was handled without causing real CPU fault */
/* now we have a real cpu fault */
tb = tb_find_pc(pc);
if (tb) {
/* the PC is inside the translated code. It means that we have
a virtual CPU fault */
cpu_restore_state(tb, env, pc, puc);
}
if (ret == 1) {
#if 0
printf("PF exception: PC=0x" TARGET_FMT_lx " error=0x%x %p\n",
env->PC, env->error_code, tb);
#endif
/* we restore the process signal mask as the sigreturn should
do it (XXX: use sigsetjmp) */
sigprocmask(SIG_SETMASK, old_set, NULL);
cpu_loop_exit();
} else {
/* activate soft MMU for this block */
cpu_resume_from_signal(env, puc);
}
/* never comes here */
return 1;
}
#elif defined (TARGET_SH4)
static inline int handle_cpu_signal(unsigned long pc, unsigned long address,
int is_write, sigset_t *old_set,
void *puc)
{
TranslationBlock *tb;
int ret;
if (cpu_single_env)
env = cpu_single_env; /* XXX: find a correct solution for multithread */
#if defined(DEBUG_SIGNAL)
printf("qemu: SIGSEGV pc=0x%08lx address=%08lx w=%d oldset=0x%08lx\n",
pc, address, is_write, *(unsigned long *)old_set);
#endif
/* XXX: locking issue */
if (is_write && page_unprotect(h2g(address), pc, puc)) {
return 1;
}
/* see if it is an MMU fault */
ret = cpu_sh4_handle_mmu_fault(env, address, is_write, MMU_USER_IDX, 0);
if (ret < 0)
return 0; /* not an MMU fault */
if (ret == 0)
return 1; /* the MMU fault was handled without causing real CPU fault */
/* now we have a real cpu fault */
tb = tb_find_pc(pc);
if (tb) {
/* the PC is inside the translated code. It means that we have
a virtual CPU fault */
cpu_restore_state(tb, env, pc, puc);
}
#if 0
printf("PF exception: NIP=0x%08x error=0x%x %p\n",
env->nip, env->error_code, tb);
#endif
/* we restore the process signal mask as the sigreturn should
do it (XXX: use sigsetjmp) */
sigprocmask(SIG_SETMASK, old_set, NULL);
cpu_loop_exit();
/* never comes here */
return 1;
}
#elif defined (TARGET_ALPHA)
static inline int handle_cpu_signal(unsigned long pc, unsigned long address,
int is_write, sigset_t *old_set,
void *puc)
{
TranslationBlock *tb;
int ret;
if (cpu_single_env)
env = cpu_single_env; /* XXX: find a correct solution for multithread */
#if defined(DEBUG_SIGNAL)
printf("qemu: SIGSEGV pc=0x%08lx address=%08lx w=%d oldset=0x%08lx\n",
pc, address, is_write, *(unsigned long *)old_set);
#endif
/* XXX: locking issue */
if (is_write && page_unprotect(h2g(address), pc, puc)) {
return 1;
}
/* see if it is an MMU fault */
ret = cpu_alpha_handle_mmu_fault(env, address, is_write, MMU_USER_IDX, 0);
if (ret < 0)
return 0; /* not an MMU fault */
if (ret == 0)
return 1; /* the MMU fault was handled without causing real CPU fault */
/* now we have a real cpu fault */
tb = tb_find_pc(pc);
if (tb) {
/* the PC is inside the translated code. It means that we have
a virtual CPU fault */
cpu_restore_state(tb, env, pc, puc);
}
#if 0
printf("PF exception: NIP=0x%08x error=0x%x %p\n",
env->nip, env->error_code, tb);
#endif
/* we restore the process signal mask as the sigreturn should
do it (XXX: use sigsetjmp) */
sigprocmask(SIG_SETMASK, old_set, NULL);
cpu_loop_exit();
/* never comes here */
return 1;
}
#elif defined (TARGET_CRIS)
static inline int handle_cpu_signal(unsigned long pc, unsigned long address,
int is_write, sigset_t *old_set,
void *puc)
{
TranslationBlock *tb;
int ret;
if (cpu_single_env)
env = cpu_single_env; /* XXX: find a correct solution for multithread */
#if defined(DEBUG_SIGNAL)
printf("qemu: SIGSEGV pc=0x%08lx address=%08lx w=%d oldset=0x%08lx\n",
pc, address, is_write, *(unsigned long *)old_set);
#endif
/* XXX: locking issue */
if (is_write && page_unprotect(h2g(address), pc, puc)) {
return 1;
}
/* see if it is an MMU fault */
ret = cpu_cris_handle_mmu_fault(env, address, is_write, MMU_USER_IDX, 0);
if (ret < 0)
return 0; /* not an MMU fault */
if (ret == 0)
return 1; /* the MMU fault was handled without causing real CPU fault */
/* now we have a real cpu fault */
tb = tb_find_pc(pc);
if (tb) {
/* the PC is inside the translated code. It means that we have
a virtual CPU fault */
cpu_restore_state(tb, env, pc, puc);
}
/* we restore the process signal mask as the sigreturn should
do it (XXX: use sigsetjmp) */
sigprocmask(SIG_SETMASK, old_set, NULL);
cpu_loop_exit();
/* never comes here */
return 1;
}
#else
#error unsupported target CPU
#endif
#if defined(__i386__)

1
target-alpha/cpu.h
View file

@ -433,6 +433,7 @@ int cpu_alpha_signal_handler(int host_signum, void *pinfo,
void *puc);
int cpu_alpha_handle_mmu_fault (CPUState *env, uint64_t address, int rw,
int mmu_idx, int is_softmmu);
#define cpu_handle_mmu_fault cpu_alpha_handle_mmu_fault
void do_interrupt (CPUState *env);
int cpu_alpha_mfpr (CPUState *env, int iprn, uint64_t *valp);

1
target-arm/cpu.h
View file

@ -220,6 +220,7 @@ int cpu_arm_signal_handler(int host_signum, void *pinfo,
void *puc);
int cpu_arm_handle_mmu_fault (CPUARMState *env, target_ulong address, int rw,
int mmu_idx, int is_softmuu);
#define cpu_handle_mmu_fault cpu_arm_handle_mmu_fault
void cpu_lock(void);
void cpu_unlock(void);

1
target-cris/cpu.h
View file

@ -213,6 +213,7 @@ static inline int cpu_mmu_index (CPUState *env)
int cpu_cris_handle_mmu_fault(CPUState *env, target_ulong address, int rw,
int mmu_idx, int is_softmmu);
#define cpu_handle_mmu_fault cpu_cris_handle_mmu_fault
#if defined(CONFIG_USER_ONLY)
static inline void cpu_clone_regs(CPUState *env, target_ulong newsp)

1
target-i386/cpu.h
View file

@ -799,6 +799,7 @@ int cpu_x86_signal_handler(int host_signum, void *pinfo,
/* helper.c */
int cpu_x86_handle_mmu_fault(CPUX86State *env, target_ulong addr,
int is_write, int mmu_idx, int is_softmmu);
#define cpu_handle_mmu_fault cpu_x86_handle_mmu_fault
void cpu_x86_set_a20(CPUX86State *env, int a20_state);
void cpu_x86_cpuid(CPUX86State *env, uint32_t index, uint32_t count,
uint32_t *eax, uint32_t *ebx,

1
target-m68k/cpu.h
View file

@ -227,6 +227,7 @@ static inline int cpu_mmu_index (CPUState *env)
int cpu_m68k_handle_mmu_fault(CPUState *env, target_ulong address, int rw,
int mmu_idx, int is_softmmu);
#define cpu_handle_mmu_fault cpu_m68k_handle_mmu_fault
#if defined(CONFIG_USER_ONLY)
static inline void cpu_clone_regs(CPUState *env, target_ulong newsp)

1
target-microblaze/cpu.h
View file

@ -268,6 +268,7 @@ static inline int cpu_mmu_index (CPUState *env)
int cpu_mb_handle_mmu_fault(CPUState *env, target_ulong address, int rw,
int mmu_idx, int is_softmmu);
#define cpu_handle_mmu_fault cpu_mb_handle_mmu_fault
#if defined(CONFIG_USER_ONLY)
static inline void cpu_clone_regs(CPUState *env, target_ulong newsp)

1
target-mips/cpu.h
View file

@ -584,6 +584,7 @@ void cpu_mips_update_irq (CPUState *env);
/* helper.c */
int cpu_mips_handle_mmu_fault (CPUState *env, target_ulong address, int rw,
int mmu_idx, int is_softmmu);
#define cpu_handle_mmu_fault cpu_mips_handle_mmu_fault
void do_interrupt (CPUState *env);
void r4k_invalidate_tlb (CPUState *env, int idx, int use_extra);

1
target-ppc/cpu.h
View file

@ -706,6 +706,7 @@ int cpu_ppc_signal_handler (int host_signum, void *pinfo,
void *puc);
int cpu_ppc_handle_mmu_fault (CPUPPCState *env, target_ulong address, int rw,
int mmu_idx, int is_softmmu);
#define cpu_handle_mmu_fault cpu_ppc_handle_mmu_fault
int get_physical_address (CPUPPCState *env, mmu_ctx_t *ctx, target_ulong vaddr,
int rw, int access_type);
void do_interrupt (CPUPPCState *env);

1
target-sh4/cpu.h
View file

@ -163,6 +163,7 @@ int cpu_sh4_signal_handler(int host_signum, void *pinfo,
void *puc);
int cpu_sh4_handle_mmu_fault(CPUSH4State * env, target_ulong address, int rw,
int mmu_idx, int is_softmmu);
#define cpu_handle_mmu_fault cpu_sh4_handle_mmu_fault
void do_interrupt(CPUSH4State * env);
void sh4_cpu_list(FILE *f, int (*cpu_fprintf)(FILE *f, const char *fmt, ...));

1
target-sparc/cpu.h
View file

@ -413,6 +413,7 @@ void cpu_lock(void);
void cpu_unlock(void);
int cpu_sparc_handle_mmu_fault(CPUSPARCState *env1, target_ulong address, int rw,
int mmu_idx, int is_softmmu);
#define cpu_handle_mmu_fault cpu_sparc_handle_mmu_fault
target_ulong mmu_probe(CPUSPARCState *env, target_ulong address, int mmulev);
void dump_mmu(CPUSPARCState *env);