@@ -270,13 +270,20 @@ ObjectClass *s390_cpu_class_by_name(const char *name);
void s390x_cpu_debug_excp_handler(CPUState *cs);
void s390_cpu_do_interrupt(CPUState *cpu);
bool s390_cpu_exec_interrupt(CPUState *cpu, int int_req);
-bool s390_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
- MMUAccessType access_type, int mmu_idx,
- bool probe, uintptr_t retaddr);
void s390x_cpu_do_unaligned_access(CPUState *cs, vaddr addr,
MMUAccessType access_type,
int mmu_idx, uintptr_t retaddr);
+#ifdef CONFIG_USER_ONLY
+void s390_cpu_record_sigsegv(CPUState *cs, vaddr address,
+ MMUAccessType access_type,
+ bool maperr, uintptr_t retaddr);
+#else
+bool s390_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
+ MMUAccessType access_type, int mmu_idx,
+ bool probe, uintptr_t retaddr);
+#endif
+
/* fpu_helper.c */
uint32_t set_cc_nz_f32(float32 v);
@@ -21,9 +21,8 @@
#include "qemu-common.h"
#include "qemu.h"
#include "cpu_loop-common.h"
+#include "signal-common.h"
-/* s390x masks the fault address it reports in si_addr for SIGSEGV and SIGBUS */
-#define S390X_FAIL_ADDR_MASK -4096LL
static int get_pgm_data_si_code(int dxc_code)
{
@@ -109,12 +108,13 @@ void cpu_loop(CPUS390XState *env)
n = TARGET_ILL_ILLOPC;
goto do_signal_pc;
case PGM_PROTECTION:
+ force_sig_fault(TARGET_SIGSEGV, TARGET_SEGV_ACCERR,
+ env->__excp_addr);
+ break;
case PGM_ADDRESSING:
- sig = TARGET_SIGSEGV;
- /* XXX: check env->error_code */
- n = TARGET_SEGV_MAPERR;
- addr = env->__excp_addr & S390X_FAIL_ADDR_MASK;
- goto do_signal;
+ force_sig_fault(TARGET_SIGSEGV, TARGET_SEGV_MAPERR,
+ env->__excp_addr);
+ break;
case PGM_EXECUTE:
case PGM_SPECIFICATION:
case PGM_SPECIAL_OP:
@@ -268,10 +268,12 @@ static void s390_cpu_reset_full(DeviceState *dev)
static const struct TCGCPUOps s390_tcg_ops = {
.initialize = s390x_translate_init,
- .tlb_fill = s390_cpu_tlb_fill,
-#if !defined(CONFIG_USER_ONLY)
+#ifdef CONFIG_USER_ONLY
+ .record_sigsegv = s390_cpu_record_sigsegv,
+#else
.has_work = s390_cpu_has_work,
+ .tlb_fill = s390_cpu_tlb_fill,
.cpu_exec_interrupt = s390_cpu_exec_interrupt,
.do_interrupt = s390_cpu_do_interrupt,
.debug_excp_handler = s390x_cpu_debug_excp_handler,
@@ -89,16 +89,20 @@ void s390_cpu_do_interrupt(CPUState *cs)
cs->exception_index = -1;
}
-bool s390_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
- MMUAccessType access_type, int mmu_idx,
- bool probe, uintptr_t retaddr)
+void s390_cpu_record_sigsegv(CPUState *cs, vaddr address,
+ MMUAccessType access_type,
+ bool maperr, uintptr_t retaddr)
{
S390CPU *cpu = S390_CPU(cs);
- trigger_pgm_exception(&cpu->env, PGM_ADDRESSING);
- /* On real machines this value is dropped into LowMem. Since this
- is userland, simply put this someplace that cpu_loop can find it. */
- cpu->env.__excp_addr = address;
+ trigger_pgm_exception(&cpu->env, maperr ? PGM_ADDRESSING : PGM_PROTECTION);
+ /*
+ * On real machines this value is dropped into LowMem. Since this
+ * is userland, simply put this someplace that cpu_loop can find it.
+ * S390 only gives the page of the fault, not the exact address.
+ * C.f. the construction of TEC in mmu_translate().
+ */
+ cpu->env.__excp_addr = address & TARGET_PAGE_MASK;
cpu_loop_exit_restore(cs, retaddr);
}
Move the masking of the address from cpu_loop into s390_cpu_record_sigsegv -- this is governed by hw, not linux. This does mean we have to raise our own exception, rather than return to the fallback. Use maperr to choose between PGM_PROTECTION and PGM_ADDRESSING. Use the appropriate si_code for each in cpu_loop. Signed-off-by: Richard Henderson <richard.henderson@linaro.org> --- target/s390x/s390x-internal.h | 13 ++++++++++--- linux-user/s390x/cpu_loop.c | 14 +++++++------- target/s390x/cpu.c | 6 ++++-- target/s390x/tcg/excp_helper.c | 18 +++++++++++------- 4 files changed, 32 insertions(+), 19 deletions(-) -- 2.25.1