[PULL 59/60] target/nios2: Eliminate nios2_semi_is_lseek

[Richard Henderson <richard.henderson@linaro.org>]

Reorg nios2_semi_return_* to gdb_syscall_complete_cb.
Use the 32-bit version normally, and the 64-bit version
for HOSTED_LSEEK.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/nios2/nios2-semi.c | 59 +++++++++++++++------------------------
 1 file changed, 23 insertions(+), 36 deletions(-)

diff --git a/target/nios2/nios2-semi.c b/target/nios2/nios2-semi.c
index 4d02789d26..bdf8849689 100644
--- a/target/nios2/nios2-semi.c
+++ b/target/nios2/nios2-semi.c
@@ -108,9 +108,12 @@ static bool translate_stat(CPUNios2State *env, target_ulong addr,
     return true;
 }
 
-static void nios2_semi_return_u32(CPUNios2State *env, uint32_t ret, int err)
+static void nios2_semi_u32_cb(CPUState *cs, uint64_t ret, int err)
 {
+    Nios2CPU *cpu = NIOS2_CPU(cs);
+    CPUNios2State *env = &cpu->env;
     target_ulong args = env->regs[R_ARG1];
+
     if (put_user_u32(ret, args) ||
         put_user_u32(err, args + 4)) {
         /*
@@ -123,9 +126,12 @@ static void nios2_semi_return_u32(CPUNios2State *env, uint32_t ret, int err)
     }
 }
 
-static void nios2_semi_return_u64(CPUNios2State *env, uint64_t ret, int err)
+static void nios2_semi_u64_cb(CPUState *cs, uint64_t ret, int err)
 {
+    Nios2CPU *cpu = NIOS2_CPU(cs);
+    CPUNios2State *env = &cpu->env;
     target_ulong args = env->regs[R_ARG1];
+
     if (put_user_u32(ret >> 32, args) ||
         put_user_u32(ret, args + 4) ||
         put_user_u32(err, args + 8)) {
@@ -135,25 +141,6 @@ static void nios2_semi_return_u64(CPUNios2State *env, uint64_t ret, int err)
     }
 }
 
-static int nios2_semi_is_lseek;
-
-static void nios2_semi_cb(CPUState *cs, uint64_t ret, int err)
-{
-    Nios2CPU *cpu = NIOS2_CPU(cs);
-    CPUNios2State *env = &cpu->env;
-
-    if (nios2_semi_is_lseek) {
-        /*
-         * FIXME: We've already lost the high bits of the lseek
-         * return value.
-         */
-        nios2_semi_return_u64(env, ret, err);
-        nios2_semi_is_lseek = 0;
-    } else {
-        nios2_semi_return_u32(env, ret, err);
-    }
-}
-
 /*
  * Read the input value from the argument block; fail the semihosting
  * call if the memory read fails.
@@ -168,6 +155,7 @@ static void nios2_semi_cb(CPUState *cs, uint64_t ret, int err)
 
 void do_nios2_semihosting(CPUNios2State *env)
 {
+    CPUState *cs = env_cpu(env);
     int nr;
     uint32_t args;
     target_ulong arg0, arg1, arg2, arg3;
@@ -188,7 +176,7 @@ void do_nios2_semihosting(CPUNios2State *env)
         GET_ARG(2);
         GET_ARG(3);
         if (use_gdb_syscalls()) {
-            gdb_do_syscall(nios2_semi_cb, "open,%s,%x,%x", arg0, (int)arg1,
+            gdb_do_syscall(nios2_semi_u32_cb, "open,%s,%x,%x", arg0, (int)arg1,
                            arg2, arg3);
             return;
         } else {
@@ -209,7 +197,7 @@ void do_nios2_semihosting(CPUNios2State *env)
             int fd = arg0;
             if (fd > 2) {
                 if (use_gdb_syscalls()) {
-                    gdb_do_syscall(nios2_semi_cb, "close,%x", arg0);
+                    gdb_do_syscall(nios2_semi_u32_cb, "close,%x", arg0);
                     return;
                 } else {
                     result = close(fd);
@@ -225,7 +213,7 @@ void do_nios2_semihosting(CPUNios2State *env)
         GET_ARG(2);
         len = arg2;
         if (use_gdb_syscalls()) {
-            gdb_do_syscall(nios2_semi_cb, "read,%x,%x,%x",
+            gdb_do_syscall(nios2_semi_u32_cb, "read,%x,%x,%x",
                            arg0, arg1, len);
             return;
         } else {
@@ -245,7 +233,7 @@ void do_nios2_semihosting(CPUNios2State *env)
         GET_ARG(2);
         len = arg2;
         if (use_gdb_syscalls()) {
-            gdb_do_syscall(nios2_semi_cb, "write,%x,%x,%x",
+            gdb_do_syscall(nios2_semi_u32_cb, "write,%x,%x,%x",
                            arg0, arg1, len);
             return;
         } else {
@@ -268,12 +256,11 @@ void do_nios2_semihosting(CPUNios2State *env)
             GET_ARG(3);
             off = (uint32_t)arg2 | ((uint64_t)arg1 << 32);
             if (use_gdb_syscalls()) {
-                nios2_semi_is_lseek = 1;
-                gdb_do_syscall(nios2_semi_cb, "lseek,%x,%lx,%x",
+                gdb_do_syscall(nios2_semi_u64_cb, "lseek,%x,%lx,%x",
                                arg0, off, arg3);
             } else {
                 off = lseek(arg0, off, arg3);
-                nios2_semi_return_u64(env, off, errno);
+                nios2_semi_u64_cb(cs, off, errno);
             }
             return;
         }
@@ -283,7 +270,7 @@ void do_nios2_semihosting(CPUNios2State *env)
         GET_ARG(2);
         GET_ARG(3);
         if (use_gdb_syscalls()) {
-            gdb_do_syscall(nios2_semi_cb, "rename,%s,%s",
+            gdb_do_syscall(nios2_semi_u32_cb, "rename,%s,%s",
                            arg0, (int)arg1, arg2, (int)arg3);
             return;
         } else {
@@ -303,7 +290,7 @@ void do_nios2_semihosting(CPUNios2State *env)
         GET_ARG(0);
         GET_ARG(1);
         if (use_gdb_syscalls()) {
-            gdb_do_syscall(nios2_semi_cb, "unlink,%s",
+            gdb_do_syscall(nios2_semi_u32_cb, "unlink,%s",
                            arg0, (int)arg1);
             return;
         } else {
@@ -322,7 +309,7 @@ void do_nios2_semihosting(CPUNios2State *env)
         GET_ARG(1);
         GET_ARG(2);
         if (use_gdb_syscalls()) {
-            gdb_do_syscall(nios2_semi_cb, "stat,%s,%x",
+            gdb_do_syscall(nios2_semi_u32_cb, "stat,%s,%x",
                            arg0, (int)arg1, arg2);
             return;
         } else {
@@ -345,7 +332,7 @@ void do_nios2_semihosting(CPUNios2State *env)
         GET_ARG(0);
         GET_ARG(1);
         if (use_gdb_syscalls()) {
-            gdb_do_syscall(nios2_semi_cb, "fstat,%x,%x",
+            gdb_do_syscall(nios2_semi_u32_cb, "fstat,%x,%x",
                            arg0, arg1);
             return;
         } else {
@@ -361,7 +348,7 @@ void do_nios2_semihosting(CPUNios2State *env)
         /* Only the tv parameter is used.  tz is assumed NULL.  */
         GET_ARG(0);
         if (use_gdb_syscalls()) {
-            gdb_do_syscall(nios2_semi_cb, "gettimeofday,%x,%x",
+            gdb_do_syscall(nios2_semi_u32_cb, "gettimeofday,%x,%x",
                            arg0, 0);
             return;
         } else {
@@ -382,7 +369,7 @@ void do_nios2_semihosting(CPUNios2State *env)
     case HOSTED_ISATTY:
         GET_ARG(0);
         if (use_gdb_syscalls()) {
-            gdb_do_syscall(nios2_semi_cb, "isatty,%x", arg0);
+            gdb_do_syscall(nios2_semi_u32_cb, "isatty,%x", arg0);
             return;
         } else {
             result = isatty(arg0);
@@ -392,7 +379,7 @@ void do_nios2_semihosting(CPUNios2State *env)
         GET_ARG(0);
         GET_ARG(1);
         if (use_gdb_syscalls()) {
-            gdb_do_syscall(nios2_semi_cb, "system,%s",
+            gdb_do_syscall(nios2_semi_u32_cb, "system,%s",
                            arg0, (int)arg1);
             return;
         } else {
@@ -412,5 +399,5 @@ void do_nios2_semihosting(CPUNios2State *env)
         result = 0;
     }
 failed:
-    nios2_semi_return_u32(env, result, errno);
+    nios2_semi_u32_cb(cs, result, errno);
 }
-- 
2.34.1