Commit a5b3f8863f for openssl.org

commit a5b3f8863fcefe98c0baeaf954f84a1f8017eba2
Author: Mounir IDRASSI <mounir.idrassi@idrix.fr>
Date:   Tue Jul 7 15:45:07 2026 +0900

    Fix SM2 RISC-V64 crash from functions emitted into .rodata

    The ecp_sm2p256-riscv64.pl generator switches to .section .rodata
    to emit constant data (.Lpoly, .Lord, .Lpoly_div_2, .Lord_div_2), but
    never switches back before emitting function code.

    As a result, the function symbols defined by this file are assembled
    into .rodata instead of executable .text. On systems enforcing NX for
    .rodata, calling the RISC-V64 SM2 assembly faults immediately.

    Fix this by adding .previous after the constant block, restoring the
    initial .text section before function emission.

    Verified with readelf: before the fix, .text is empty and the function
    symbols are in .rodata; after the fix, constants remain in .rodata and
    the function symbols are in executable .text.

    Introduced in commit 05301b100f (PR #25918).

    Reviewed-by: Paul Yang <paulyang.inf@gmail.com>
    Reviewed-by: Saša Nedvědický <sashan@openssl.org>
    MergeDate: Mon Jul 20 09:47:35 2026
    (Merged from https://github.com/openssl/openssl/pull/31874)

diff --git a/crypto/ec/asm/ecp_sm2p256-riscv64.pl b/crypto/ec/asm/ecp_sm2p256-riscv64.pl
index 2a17e124dc..40938e75c0 100644
--- a/crypto/ec/asm/ecp_sm2p256-riscv64.pl
+++ b/crypto/ec/asm/ecp_sm2p256-riscv64.pl
@@ -366,7 +366,7 @@ $code.=<<___;
 .type .Lord_div_2,\@object
 .Lord_div_2:
 .dword	0xa9ddfa049ceaa092,0xb901efb590e30295,0xffffffffffffffff,0x7fffffff7fffffff
-
+.previous

 // void bn_rshift1(BN_ULONG *a);
 .globl	bn_rshift1