[v4,09/26] RISC-V: Include intruction hex in disassembly

Commit Message

Michael Clark March 19, 2018, 9:18 p.m. UTC

This was added to help debug issues using -d in_asm. It is
useful to see the instruction bytes, as one can detect if
one is trying to execute ASCII or device-tree magic.

Cc: Sagar Karandikar <[e-mail]>
Cc: Bastian Koppelmann <[e-mail]>
Signed-off-by: Michael Clark <[e-mail]>
Signed-off-by: Palmer Dabbelt <[e-mail]>
Reviewed-by: Philippe Mathieu-Daudé <[e-mail]>
---
 disas/riscv.c | 39 ++++++++++++++++++++-------------------
 1 file changed, 20 insertions(+), 19 deletions(-)

Patch

diff --git a/disas/riscv.c b/disas/riscv.c
index 3c17501..4580308 100644
--- a/disas/riscv.c
+++ b/disas/riscv.c
@@ -2769,25 +2769,6 @@  static void format_inst(char *buf, size_t buflen, size_t tab, rv_decode *dec)
     char tmp[64];
     const char *fmt;
 
-    if (dec->op == rv_op_illegal) {
-        size_t len = inst_length(dec->inst);
-        switch (len) {
-        case 2:
-            snprintf(buf, buflen, "(0x%04" PRIx64 ")", dec->inst);
-            break;
-        case 4:
-            snprintf(buf, buflen, "(0x%08" PRIx64 ")", dec->inst);
-            break;
-        case 6:
-            snprintf(buf, buflen, "(0x%012" PRIx64 ")", dec->inst);
-            break;
-        default:
-            snprintf(buf, buflen, "(0x%016" PRIx64 ")", dec->inst);
-            break;
-        }
-        return;
-    }
-
     fmt = opcode_data[dec->op].format;
     while (*fmt) {
         switch (*fmt) {
@@ -3004,6 +2985,11 @@  disasm_inst(char *buf, size_t buflen, rv_isa isa, uint64_t pc, rv_inst inst)
     format_inst(buf, buflen, 16, &dec);
 }
 
+#define INST_FMT_2 "%04" PRIx64 "              "
+#define INST_FMT_4 "%08" PRIx64 "          "
+#define INST_FMT_6 "%012" PRIx64 "      "
+#define INST_FMT_8 "%016" PRIx64 "  "
+
 static int
 print_insn_riscv(bfd_vma memaddr, struct disassemble_info *info, rv_isa isa)
 {
@@ -3031,6 +3017,21 @@  print_insn_riscv(bfd_vma memaddr, struct disassemble_info *info, rv_isa isa)
         }
     }
 
+    switch (len) {
+    case 2:
+        (*info->fprintf_func)(info->stream, INST_FMT_2, inst);
+        break;
+    case 4:
+        (*info->fprintf_func)(info->stream, INST_FMT_4, inst);
+        break;
+    case 6:
+        (*info->fprintf_func)(info->stream, INST_FMT_6, inst);
+        break;
+    default:
+        (*info->fprintf_func)(info->stream, INST_FMT_8, inst);
+        break;
+    }
+
     disasm_inst(buf, sizeof(buf), isa, memaddr, inst);
     (*info->fprintf_func)(info->stream, "%s", buf);