disas: include an optional note for the start of disassembly

This will become useful shortly for providing more information about
output assembly inline. While there fix up the indenting and code
formatting in disas().

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>

Message-Id: <20200513175134.19619-9-alex.bennee@linaro.org>

5 files changed, 17 insertions, 11 deletions

diff --git a/accel/tcg/translate-all.c b/accel/tcg/translate-all.c
index e4f703a..cdf58bb 100644
--- a/accel/tcg/translate-all.c
+++ b/accel/tcg/translate-all.c
@@ -1800,7 +1800,7 @@ TranslationBlock *tb_gen_code(CPUState *cpu,
             size_t data_size = gen_code_size - code_size;
             size_t i;
 
-            log_disas(tb->tc.ptr, code_size);
+            log_disas(tb->tc.ptr, code_size, NULL);
 
             for (i = 0; i < data_size; i += sizeof(tcg_target_ulong)) {
                 if (sizeof(tcg_target_ulong) == 8) {
@@ -1814,7 +1814,7 @@ TranslationBlock *tb_gen_code(CPUState *cpu,
                 }
             }
         } else {
-            log_disas(tb->tc.ptr, gen_code_size);
+            log_disas(tb->tc.ptr, gen_code_size, NULL);
         }
         qemu_log("\n");
         qemu_log_flush();
diff --git a/disas.c b/disas.c
index 3937da6..7e8692d 100644
--- a/disas.c
+++ b/disas.c
@@ -586,7 +586,7 @@ char *plugin_disas(CPUState *cpu, uint64_t addr, size_t size)
 }
 
 /* Disassemble this for me please... (debugging). */
-void disas(FILE *out, void *code, unsigned long size)
+void disas(FILE *out, void *code, unsigned long size, const char *note)
 {
     uintptr_t pc;
     int count;
@@ -674,10 +674,16 @@ void disas(FILE *out, void *code, unsigned long size)
     for (pc = (uintptr_t)code; size > 0; pc += count, size -= count) {
         fprintf(out, "0x%08" PRIxPTR ":  ", pc);
         count = print_insn(pc, &s.info);
-	fprintf(out, "\n");
-	if (count < 0)
-	    break;
+        if (note) {
+            fprintf(out, "\t\t%s", note);
+            note = NULL;
+        }
+        fprintf(out, "\n");
+        if (count < 0) {
+            break;
+        }
     }
+
 }
 
 /* Look up symbol for debugging purpose.  Returns "" if unknown. */
diff --git a/include/disas/disas.h b/include/disas/disas.h
index 36c33f6..1b6e035 100644
--- a/include/disas/disas.h
+++ b/include/disas/disas.h
@@ -7,7 +7,7 @@
 #include "cpu.h"
 
 /* Disassemble this for me please... (debugging). */
-void disas(FILE *out, void *code, unsigned long size);
+void disas(FILE *out, void *code, unsigned long size, const char *note);
 void target_disas(FILE *out, CPUState *cpu, target_ulong code,
                   target_ulong size);
 
diff --git a/include/exec/log.h b/include/exec/log.h
index fcc7b9e..3ed797c 100644
--- a/include/exec/log.h
+++ b/include/exec/log.h
@@ -56,13 +56,13 @@ static inline void log_target_disas(CPUState *cpu, target_ulong start,
     rcu_read_unlock();
 }
 
-static inline void log_disas(void *code, unsigned long size)
+static inline void log_disas(void *code, unsigned long size, const char *note)
 {
     QemuLogFile *logfile;
     rcu_read_lock();
     logfile = atomic_rcu_read(&qemu_logfile);
     if (logfile) {
-        disas(logfile->fd, code, size);
+        disas(logfile->fd, code, size, note);
     }
     rcu_read_unlock();
 }
diff --git a/tcg/tcg.c b/tcg/tcg.c
index dd4b3d7..a2268d9 100644
--- a/tcg/tcg.c
+++ b/tcg/tcg.c
@@ -1092,7 +1092,7 @@ void tcg_prologue_init(TCGContext *s)
             size_t data_size = prologue_size - code_size;
             size_t i;
 
-            log_disas(buf0, code_size);
+            log_disas(buf0, code_size, NULL);
 
             for (i = 0; i < data_size; i += sizeof(tcg_target_ulong)) {
                 if (sizeof(tcg_target_ulong) == 8) {
@@ -1106,7 +1106,7 @@ void tcg_prologue_init(TCGContext *s)
                 }
             }
         } else {
-            log_disas(buf0, prologue_size);
+            log_disas(buf0, prologue_size, NULL);
         }
         qemu_log("\n");
         qemu_log_flush();