[binutils-gdb] RISC-V: Set EF_RISCV_TSO also on .option arch

[binutils-gdb] RISC-V: Set EF_RISCV_TSO also on .option arch

[Tsukasa OI]

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=acab2a6872db8e6ebab3e91bc22a4df384d1c8ed

commit acab2a6872db8e6ebab3e91bc22a4df384d1c8ed
Author: Tsukasa OI <research_trasio@irq.a4lg.com>
Date:   Wed Sep 21 06:23:55 2022 +0000

    RISC-V: Set EF_RISCV_TSO also on .option arch
    
    This is a minor fix to commit 96462b012988d35ebb1137a2ad9fd0a96547d79a
    ("RISC-V: Implement Ztso extension").  Currently, it sets EF_RISCV_TSO ELF
    flag when initial ISA string contains the 'Ztso' extension.  However, GAS
    has a way to update the ISA string: ".option arch".
    
    When the architecture is updated by ".option arch", EF_RISCV_RVC ELF flag
    is set when the 'C' extension is detected.  Analogously, this commit sets
    the EF_RISCV_TSO when the 'Ztso' extension is detected.
    
    gas/ChangeLog:
    
            * config/tc-riscv.c (s_riscv_option): Set TSO ELF flag if the
            'Ztso' extension is specified via ".option arch" directive.

Diff:
---
 gas/config/tc-riscv.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/gas/config/tc-riscv.c b/gas/config/tc-riscv.c
index b1abc8553b0..42d7bf62e4f 100644
--- a/gas/config/tc-riscv.c
+++ b/gas/config/tc-riscv.c
@@ -3888,6 +3888,9 @@ s_riscv_option (int x ATTRIBUTE_UNUSED)
       riscv_set_rvc (false);
       if (riscv_subset_supports (&riscv_rps_as, "c"))
 	riscv_set_rvc (true);
+
+      if (riscv_subset_supports (&riscv_rps_as, "ztso"))
+	riscv_set_tso ();
     }
   else if (strcmp (name, "push") == 0)
     {