[binutils-gdb] RISC-V: Add missing disassembler option `max`

[Nelson Chu]

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=88891208c3f0e05f560f39bcdce65a55cc750acb

commit 88891208c3f0e05f560f39bcdce65a55cc750acb
Author: Marek Pikuła <m.pikula@partner.samsung.com>
Date:   Tue Apr 1 17:43:16 2025 +0200

    RISC-V: Add missing disassembler option `max`
    
    The flag already exists but it's not been exposed to user.
    
    Signed-off-by: Marek Pikuła <m.pikula@partner.samsung.com>

Diff:
---
 binutils/doc/binutils.texi | 8 ++++++++
 opcodes/riscv-dis.c        | 6 +++++-
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/binutils/doc/binutils.texi b/binutils/doc/binutils.texi
index b291670fc6c..c74526e929a 100644
--- a/binutils/doc/binutils.texi
+++ b/binutils/doc/binutils.texi
@@ -2701,6 +2701,14 @@ but the result again may not be as you expect.
 For RISC-V, the following options are supported:
 
 @table @code
+@item max
+Disassemble without checking architecture string. This is a best effort mode, so
+for overlapping ISA extensions the first match (possibly incorrect in a given
+context) will be used to decode the instruction. It's useful, if the ELF file
+doesn't expose ISA string, preventing automatic ISA subset deduction, and the
+default fallback ISA string (@code{rv64gc}) doesn't cover all instructions in
+the binary.
+
 @item numeric
 Print numeric register names, rather than ABI names (e.g., print @code{x2}
 instead of @code{sp}).
diff --git a/opcodes/riscv-dis.c b/opcodes/riscv-dis.c
index f862ef28a16..277b8fd4737 100644
--- a/opcodes/riscv-dis.c
+++ b/opcodes/riscv-dis.c
@@ -69,7 +69,7 @@ struct riscv_private_data
   const char (*riscv_fpr_names)[NRC];
   /* If set, disassemble as most general instruction.  */
   bool no_aliases;
-  /* If set, disassemble without checking architectire string, just like what
+  /* If set, disassemble without checking architecture string, just like what
      we did at the beginning.  */
   bool all_ext;
 };
@@ -83,6 +83,7 @@ set_default_riscv_dis_options (struct disassemble_info *info)
   pd->riscv_gpr_names = riscv_gpr_names_abi;
   pd->riscv_fpr_names = riscv_fpr_names_abi;
   pd->no_aliases = false;
+  pd->all_ext = false;
 }
 
 /* Parse RISC-V disassembler option (without arguments).  */
@@ -1580,6 +1581,9 @@ static struct
   riscv_option_arg_t arg;
 } riscv_options[] =
 {
+  { "max",
+    N_("Disassemble without checking architecture string."),
+    RISCV_OPTION_ARG_NONE },
   { "numeric",
     N_("Print numeric register names, rather than ABI names."),
     RISCV_OPTION_ARG_NONE },