[PATCH 1/3] RISC-V: Print highest address on disassembler

[Tsukasa OI]

This patch makes possible to print the highest address (0xffffffff on RV32,
0xffffffff_ffffffff on RV64).  This is particularly useful if the highest
address space is used for I/O registers and corresponding symbols
are defined.

opcodes/ChangeLog:

	* riscv-dis.c (struct riscv_private_data): Add `to_print_addr' to
	enable printing the highest address.
	(maybe_print_address): Utilize `to_print_addr'.
	(riscv_disassemble_insn): Likewise.
---
 opcodes/riscv-dis.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/opcodes/riscv-dis.c b/opcodes/riscv-dis.c
index 164fd209dbd..31a7e0975d2 100644
--- a/opcodes/riscv-dis.c
+++ b/opcodes/riscv-dis.c
@@ -52,6 +52,7 @@ struct riscv_private_data
   bfd_vma gp;
   bfd_vma print_addr;
   bfd_vma hi_addr[OP_MASK_RD + 1];
+  bool to_print_addr;
 };
 
 /* Used for mapping symbols.  */
@@ -181,6 +182,9 @@ maybe_print_address (struct riscv_private_data *pd, int base_reg, int offset,
     pd->print_addr = pd->gp + offset;
   else if (base_reg == X_TP || base_reg == 0)
     pd->print_addr = offset;
+  else
+    return;
+  pd->to_print_addr = true;
 
   /* Sign-extend a 32-bit value to a 64-bit value.  */
   if (wide)
@@ -596,7 +600,7 @@ riscv_disassemble_insn (bfd_vma memaddr, insn_t word, disassemble_info *info)
 
       pd = info->private_data = xcalloc (1, sizeof (struct riscv_private_data));
       pd->gp = -1;
-      pd->print_addr = -1;
+      pd->to_print_addr = false;
       for (i = 0; i < (int)ARRAY_SIZE (pd->hi_addr); i++)
 	pd->hi_addr[i] = -1;
 
@@ -662,13 +666,13 @@ riscv_disassemble_insn (bfd_vma memaddr, insn_t word, disassemble_info *info)
 	  print_insn_args (op->args, word, memaddr, info);
 
 	  /* Try to disassemble multi-instruction addressing sequences.  */
-	  if (pd->print_addr != (bfd_vma)-1)
+	  if (pd->to_print_addr)
 	    {
 	      info->target = pd->print_addr;
 	      (*info->fprintf_styled_func)
 		(info->stream, dis_style_comment_start, " # ");
 	      (*info->print_address_func) (info->target, info);
-	      pd->print_addr = -1;
+	      pd->to_print_addr = false;
 	    }
 
 	  /* Finish filling out insn_info fields.  */
-- 
2.34.1