Make the user path more like the system path. Prepare for more kinds
of runtime exceptions. Compute ILC from S->NEXT_PC, rather than
passing it around.
Signed-off-by: Richard Henderson <address@hidden>
---
linux-user/main.c | 133 +++++++++++++++++----------
target-s390x/cpu.h | 11 ---
target-s390x/misc_helper.c | 10 ++-
target-s390x/translate.c | 220 +++++++++++++++++----------------------------
4 files changed, 174 insertions(+), 200 deletions(-)
diff --git a/linux-user/main.c b/linux-user/main.c
index 1a1c661..8f6f39b 100644
--- a/linux-user/main.c
+++ b/linux-user/main.c
@@ -2935,71 +2935,108 @@ void cpu_loop(CPUAlphaState *env)
#ifdef TARGET_S390X
void cpu_loop(CPUS390XState *env)
{
- int trapnr;
+ int trapnr, n, sig;
target_siginfo_t info;
+ target_ulong addr;
while (1) {
- trapnr = cpu_s390x_exec (env);
-
+ trapnr = cpu_s390x_exec(env);
switch (trapnr) {
case EXCP_INTERRUPT:
- /* just indicate that signals should be handled asap */
+ /* Just indicate that signals should be handled asap. */
break;
- case EXCP_DEBUG:
- {
- int sig;
- sig = gdb_handlesig (env, TARGET_SIGTRAP);
- if (sig) {
- info.si_signo = sig;
- info.si_errno = 0;
- info.si_code = TARGET_TRAP_BRKPT;
- queue_signal(env, info.si_signo, &info);
- }
+ case EXCP_SVC:
+ n = env->int_svc_code;
+ if (!n) {
+ /* syscalls > 255 */
+ n = env->regs[1];
}
+ env->psw.addr += env->int_svc_ilc;
+ env->regs[2] = do_syscall(env, n, env->regs[2], env->regs[3],
+ env->regs[4], env->regs[5],
+ env->regs[6], env->regs[7], 0, 0);
break;
- case EXCP_SVC:
- {
- int n = env->int_svc_code;
- if (!n) {
- /* syscalls > 255 */
- n = env->regs[1];
- }
- env->psw.addr += env->int_svc_ilc;
- env->regs[2] = do_syscall(env, n,
- env->regs[2],
- env->regs[3],
- env->regs[4],
- env->regs[5],
- env->regs[6],
- env->regs[7],
- 0, 0);
+
+ case EXCP_DEBUG:
+ sig = gdb_handlesig(env, TARGET_SIGTRAP);
+ if (sig) {
+ n = TARGET_TRAP_BRKPT;
+ goto do_signal_pc;
}
break;
- case EXCP_ADDR:
- {
- info.si_signo = SIGSEGV;
- info.si_errno = 0;
+ case EXCP_PGM:
+ n = env->int_pgm_code;
+ switch (n) {
+ case PGM_OPERATION:
+ case PGM_PRIVILEGED:
+ sig = SIGILL;
+ n = TARGET_ILL_ILLOPC;
+ goto do_signal_pc;
+ case PGM_PROTECTION:
+ case PGM_ADDRESSING:
+ sig = SIGSEGV;
/* XXX: check env->error_code */
- info.si_code = TARGET_SEGV_MAPERR;
- info._sifields._sigfault._addr = env->__excp_addr;
- queue_signal(env, info.si_signo, &info);
+ n = TARGET_SEGV_MAPERR;
+ addr = env->__excp_addr;
+ goto do_signal;
+ case PGM_EXECUTE:
+ case PGM_SPECIFICATION:
+ case PGM_DATA:
+ case PGM_SPECIAL_OP:
+ case PGM_OPERAND:
+ sig = SIGILL;
+ n = TARGET_ILL_ILLOPN;
+ goto do_signal_pc;
+ case PGM_FIXPT_OVERFLOW:
+ sig = SIGFPE;
+ n = TARGET_FPE_INTOVF;
+ goto do_signal_pc;
+ case PGM_FIXPT_DIVIDE:
+ sig = SIGFPE;
+ n = TARGET_FPE_INTDIV;
+ goto do_signal_pc;
+ case PGM_HFP_EXP_OVERFLOW:
+ sig = SIGFPE;
+ n = TARGET_FPE_FLTOVF;
+ goto do_signal_pc;
+ case PGM_HFP_EXP_UNDERFLOW:
+ sig = SIGFPE;
+ n = TARGET_FPE_FLTUND;
+ goto do_signal_pc;
+ case PGM_HFP_SIGNIFICANCE:
+ sig = SIGFPE;
+ n = TARGET_FPE_FLTRES;
+ goto do_signal_pc;
+ case PGM_HFP_DIVIDE:
+ sig = SIGFPE;
+ n = TARGET_FPE_FLTDIV;
+ goto do_signal_pc;
+ case PGM_HFP_SQRT:
+ sig = SIGFPE;
+ n = TARGET_FPE_FLTINV;
+ goto do_signal_pc;
+ default:
+ fprintf(stderr, "Unhandled program exception: %#x\n", n);
+ cpu_dump_state(env, stderr, fprintf, 0);
+ exit(1);
}
break;
- case EXCP_SPEC:
- {
- fprintf(stderr,"specification exception insn 0x%08x%04x\n",
ldl(env->psw.addr), lduw(env->psw.addr + 4));
- info.si_signo = SIGILL;
- info.si_errno = 0;
- info.si_code = TARGET_ILL_ILLOPC;
- info._sifields._sigfault._addr = env->__excp_addr;
- queue_signal(env, info.si_signo, &info);
- }
+
+ do_signal_pc:
+ addr = env->psw.addr;
+ do_signal:
+ info.si_signo = sig;
+ info.si_errno = 0;
+ info.si_code = n;
+ info._sifields._sigfault._addr = addr;
+ queue_signal(env, info.si_signo, &info);
break;
+
default:
- printf ("Unhandled trap: 0x%x\n", trapnr);
+ fprintf(stderr, "Unhandled trap: 0x%x\n", trapnr);
cpu_dump_state(env, stderr, fprintf, 0);
- exit (1);
+ exit(1);
}
process_pending_signals (env);
}
diff --git a/target-s390x/cpu.h b/target-s390x/cpu.h
index 471fb91..17829b5 100644
--- a/target-s390x/cpu.h
+++ b/target-s390x/cpu.h
@@ -352,21 +352,10 @@ static inline void cpu_set_tls(CPUS390XState *env,
target_ulong newtls)
#include "exec-all.h"
-#ifdef CONFIG_USER_ONLY
-
-#define EXCP_OPEX 1 /* operation exception (sigill) */
-#define EXCP_SVC 2 /* supervisor call (syscall) */
-#define EXCP_ADDR 5 /* addressing exception */
-#define EXCP_SPEC 6 /* specification exception */
-
-#else
-
#define EXCP_EXT 1 /* external interrupt */
#define EXCP_SVC 2 /* supervisor call (syscall) */
#define EXCP_PGM 3 /* program interruption */
-#endif /* CONFIG_USER_ONLY */
-
#define INTERRUPT_EXT (1 << 0)
#define INTERRUPT_TOD (1 << 1)
#define INTERRUPT_CPUTIMER (1 << 2)
diff --git a/target-s390x/misc_helper.c b/target-s390x/misc_helper.c
index f405b97..1502f15 100644
--- a/target-s390x/misc_helper.c
+++ b/target-s390x/misc_helper.c
@@ -86,10 +86,12 @@ void do_interrupt(CPUS390XState *env)
int cpu_s390x_handle_mmu_fault(CPUS390XState *env, target_ulong address,
int rw, int mmu_idx)
{
- /* fprintf(stderr, "%s: address 0x%lx rw %d mmu_idx %d\n",
- __func__, address, rw, mmu_idx); */
- env->exception_index = EXCP_ADDR;
- /* FIXME: find out how this works on a real machine */
+ env->exception_index = EXCP_PGM;
+ env->int_pgm_code = PGM_PROTECTION;
+ /* A real machine puts the address in LowCore, which the kernel
+ helpfully interprets for us. Since we've nothing similar
+ within the userland address space, invent something for use
+ within cpu_loop. */
env->__excp_addr = address;
return 1;
}
diff --git a/target-s390x/translate.c b/target-s390x/translate.c
index 996d786..70e5d87 100644
--- a/target-s390x/translate.c
+++ b/target-s390x/translate.c
@@ -18,7 +18,6 @@
* License along with this library; if not, see
<http://www.gnu.org/licenses/>.
*/
-/* #define DEBUG_ILLEGAL_INSTRUCTIONS */
/* #define DEBUG_INLINE_BRANCHES */
#define S390X_DEBUG_DISAS
/* #define S390X_DEBUG_DISAS_VERBOSE */
@@ -336,103 +335,52 @@ static inline int get_mem_index(DisasContext *s)
}
}
-static inline void gen_debug(DisasContext *s)
+static void gen_exception(int excp)
{
- TCGv_i32 tmp = tcg_const_i32(EXCP_DEBUG);
- update_psw_addr(s);
- gen_op_calc_cc(s);
- gen_helper_exception(cpu_env, tmp);
- tcg_temp_free_i32(tmp);
- s->is_jmp = DISAS_EXCP;
-}
-
-#ifdef CONFIG_USER_ONLY
-
-static void gen_illegal_opcode(DisasContext *s, int ilc)
-{
- TCGv_i32 tmp = tcg_const_i32(EXCP_SPEC);
- update_psw_addr(s);
- gen_op_calc_cc(s);
+ TCGv_i32 tmp = tcg_const_i32(excp);
gen_helper_exception(cpu_env, tmp);
tcg_temp_free_i32(tmp);
- s->is_jmp = DISAS_EXCP;
}
-#else /* CONFIG_USER_ONLY */
-
-static void debug_print_inst(DisasContext *s, int ilc)
-{
-#ifdef DEBUG_ILLEGAL_INSTRUCTIONS
- uint64_t inst = 0;
-
- switch (ilc & 3) {
- case 1:
- inst = ld_code2(s->pc);
- break;
- case 2:
- inst = ld_code4(s->pc);
- break;
- case 3:
- inst = ld_code6(s->pc);
- break;
- }
-
- fprintf(stderr, "Illegal instruction [%d at %016" PRIx64 "]: 0x%016"
- PRIx64 "\n", ilc, s->pc, inst);
-#endif
-}
-
-static void gen_program_exception(DisasContext *s, int ilc, int code)
+static void gen_program_exception(DisasContext *s, int code)
{
TCGv_i32 tmp;
- debug_print_inst(s, ilc);
-
- /* remember what pgm exeption this was */
+ /* Remember what pgm exeption this was. */
tmp = tcg_const_i32(code);
tcg_gen_st_i32(tmp, cpu_env, offsetof(CPUS390XState, int_pgm_code));
tcg_temp_free_i32(tmp);
- tmp = tcg_const_i32(ilc);
+ tmp = tcg_const_i32(s->next_pc - s->pc);