[PULL 27/28] linux-user/sparc: Handle tag overflow traps

[Laurent Vivier <laurent@vivier.eu>]

From: Richard Henderson <richard.henderson@linaro.org>

This trap is raised by taddcctv and tsubcctv insns.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230216054516.1267305-16-richard.henderson@linaro.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
---
 linux-user/sparc/cpu_loop.c      | 3 +++
 linux-user/sparc/target_signal.h | 2 +-
 linux-user/syscall_defs.h        | 5 +++++
 3 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/linux-user/sparc/cpu_loop.c b/linux-user/sparc/cpu_loop.c
index 5a8a71e976bc..b36bb2574b94 100644
--- a/linux-user/sparc/cpu_loop.c
+++ b/linux-user/sparc/cpu_loop.c
@@ -328,6 +328,9 @@ void cpu_loop (CPUSPARCState *env)
         case TT_PRIV_INSN:
             force_sig_fault(TARGET_SIGILL, TARGET_ILL_PRVOPC, env->pc);
             break;
+        case TT_TOVF:
+            force_sig_fault(TARGET_SIGEMT, TARGET_EMT_TAGOVF, env->pc);
+            break;
 #ifdef TARGET_SPARC64
         case TT_PRIV_ACT:
             /* Note do_privact defers to do_privop. */
diff --git a/linux-user/sparc/target_signal.h b/linux-user/sparc/target_signal.h
index 87757f0c4e76..f223eb4af6a5 100644
--- a/linux-user/sparc/target_signal.h
+++ b/linux-user/sparc/target_signal.h
@@ -8,7 +8,7 @@
 #define TARGET_SIGTRAP           5
 #define TARGET_SIGABRT           6
 #define TARGET_SIGIOT            6
-#define TARGET_SIGSTKFLT         7 /* actually EMT */
+#define TARGET_SIGEMT            7
 #define TARGET_SIGFPE            8
 #define TARGET_SIGKILL           9
 #define TARGET_SIGBUS           10
diff --git a/linux-user/syscall_defs.h b/linux-user/syscall_defs.h
index 77864de57fb6..614a1cbc8e3a 100644
--- a/linux-user/syscall_defs.h
+++ b/linux-user/syscall_defs.h
@@ -717,6 +717,11 @@ typedef struct target_siginfo {
 #define TARGET_TRAP_HWBKPT      (4)     /* hardware breakpoint/watchpoint */
 #define TARGET_TRAP_UNK         (5)     /* undiagnosed trap */
 
+/*
+ * SIGEMT si_codes
+ */
+#define TARGET_EMT_TAGOVF      1       /* tag overflow */
+
 #include "target_resource.h"
 
 struct target_pollfd {
-- 
2.39.2