linux-user: Implement signals for openrisc

All of the existing code was boilerplate from elsewhere,
and would crash the guest upon the first signal.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Stafford Horne <shorne@gmail.com>

---
v2:
  Add a comment to the new definition of target_pt_regs.
  Install the signal mask into the ucontext.
v3:
  Incorporate feedback from Laurent.

1 files changed, 8 insertions, 20 deletions

diff --git a/linux-user/openrisc/target_syscall.h b/linux-user/openrisc/target_syscall.h
index 03104f80af..d586d2a018 100644
--- a/linux-user/openrisc/target_syscall.h
+++ b/linux-user/openrisc/target_syscall.h
@@ -1,27 +1,15 @@
 #ifndef OPENRISC_TARGET_SYSCALL_H
 #define OPENRISC_TARGET_SYSCALL_H
 
+/* Note that in linux/arch/openrisc/include/uapi/asm/ptrace.h,
+ * this is called user_regs_struct.  Given that this is what
+ * is used within struct sigcontext we need this definition.
+ * However, elfload.c wants this name.
+ */
 struct target_pt_regs {
-    union {
-        struct {
-            /* Named registers */
-            uint32_t sr;       /* Stored in place of r0 */
-            target_ulong sp;   /* r1 */
-        };
-        struct {
-            /* Old style */
-            target_ulong offset[2];
-            target_ulong gprs[30];
-        };
-        struct {
-            /* New style */
-            target_ulong gpr[32];
-        };
-    };
-    target_ulong pc;
-    target_ulong orig_gpr11;   /* For restarting system calls */
-    uint32_t syscallno;        /* Syscall number (used by strace) */
-    target_ulong dummy;     /* Cheap alignment fix */
+    abi_ulong gpr[32];
+    abi_ulong pc;
+    abi_ulong sr;
 };
 
 #define UNAME_MACHINE "openrisc"