[Qemu-devel] [PATCH] target-tilegx: Support dumping working flow instructions and registers

[chengang@emindsoft.com.cn]

From: Chen Gang <gang.chen.5i5j@gmail.com>

It is only for debug and analyzing tilegx qemu related issues.

Signed-off-by: Chen Gang <gang.chen.5i5j@gmail.com>
---
 target-tilegx/helper.c    | 34 ++++++++++++++++++++++++++++++++++
 target-tilegx/helper.h    |  2 ++
 target-tilegx/translate.c | 37 +++++++++++++++++++++++++++++++++++++
 3 files changed, 73 insertions(+)

diff --git a/target-tilegx/helper.c b/target-tilegx/helper.c
index 616c5c7..c7cfe66 100644
--- a/target-tilegx/helper.c
+++ b/target-tilegx/helper.c
@@ -160,3 +160,37 @@ uint64_t helper_cmul2(uint64_t srca, uint64_t srcb, int shift, int round)
 
     return deposit32(realr >> shift, 16, 16, imagr >> shift);
 }
+
+extern char **debug_buf;
+
+#define DEBUG_DUMP_REGS
+
+static void dump_regs(CPUTLGState *env, int idx)
+{
+#ifdef DEBUG_DUMP_REGS
+    int i;
+
+    if (debug_buf[idx][2] == '\n') {
+        for (i = 0; i < TILEGX_R_COUNT; i++) {
+            if (!(i % 4)) {
+                fprintf(stderr, "\n");
+            }
+            fprintf(stderr, "r%2.2u = %16.16lx, ", i, env->regs[i]);
+        }
+        fprintf(stderr, "\n");
+        for (i = 0; i < TILEGX_SPR_COUNT; i++) {
+            if (!(i % 8)) {
+                fprintf(stderr, "\n");
+            }
+            fprintf(stderr, "s%2.2u = %16.16lx, ", i, env->spregs[i]);
+        }
+        fprintf(stderr, "\n");
+    }
+#endif
+}
+
+void helper_print_step(CPUTLGState *env, int idx)
+{
+    fprintf(stderr, "%s", debug_buf[idx]);
+    dump_regs(env, idx);
+}
diff --git a/target-tilegx/helper.h b/target-tilegx/helper.h
index 9281d0f..74f796a 100644
--- a/target-tilegx/helper.h
+++ b/target-tilegx/helper.h
@@ -24,3 +24,5 @@ DEF_HELPER_FLAGS_2(v1shrs, TCG_CALL_NO_RWG_SE, i64, i64, i64)
 DEF_HELPER_FLAGS_2(v2shl, TCG_CALL_NO_RWG_SE, i64, i64, i64)
 DEF_HELPER_FLAGS_2(v2shru, TCG_CALL_NO_RWG_SE, i64, i64, i64)
 DEF_HELPER_FLAGS_2(v2shrs, TCG_CALL_NO_RWG_SE, i64, i64, i64)
+
+DEF_HELPER_2(print_step, void, env, int)
diff --git a/target-tilegx/translate.c b/target-tilegx/translate.c
index 03918eb..8489494 100644
--- a/target-tilegx/translate.c
+++ b/target-tilegx/translate.c
@@ -47,6 +47,43 @@ static const char * const reg_names[64] = {
     "sn", "idn0", "idn1", "udn0", "udn1", "udn2", "udn2", "zero"
 };
 
+#define STATIC_DEBUG
+
+char **debug_buf;
+
+#ifdef STATIC_DEBUG
+
+#include <stdarg.h>
+
+#define qemu_log_mask(flag, fmt, ...)  debug_print(flag, fmt, ##__VA_ARGS__)
+
+static int debug_idx;
+
+extern void debug_print(int flag, const char *fmt, ...);
+
+void debug_print(int flag, const char *fmt, ...)
+{
+    va_list args;
+    char buf[0x400];
+    TCGv_i32 tmp;
+
+    va_start(args, fmt);
+    vsprintf(buf, fmt, args);
+    va_end(args);
+
+    if (!debug_buf) {
+        debug_buf = malloc(sizeof(char *) * 0x400000);
+    }
+    debug_buf[debug_idx] = malloc(strlen(buf) + 1);
+    strcpy(debug_buf[debug_idx], buf);
+
+    tmp = tcg_const_i32(debug_idx++);
+    gen_helper_print_step(cpu_env, tmp);
+    tcg_temp_free_i32(tmp);
+}
+
+#endif
+
 /* Modified registers are cached in temporaries until the end of the bundle. */
 typedef struct {
     unsigned reg;
-- 
1.9.3