From: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Date: Wed, 30 Apr 2025 17:25:28 +0000 (-0300)
Subject: riscv: Fix --enable-ubsan build failure on riscv
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f13e58f9b120791c7585f60ab126ed922a319cd1;p=thirdparty%2Fglibc.git

riscv: Fix --enable-ubsan build failure on riscv

With ubsan enable, libc.so fails to build with:

[...]linkobj/libc_pic.a(setcontext.os): in function `__start_context':
[...]sysdeps/unix/sysv/linux/riscv/setcontext.S:111:(.text+0xc0): relocation
truncated to fit: R_RISCV_JAL against symbol `__GI_exit' defined in .text section
in [...]/linkobj/libc_pic.a(exit.os)

Using 'call' instead of 'j' works regardless whether UBSAN.
---

diff --git a/sysdeps/unix/sysv/linux/riscv/setcontext.S b/sysdeps/unix/sysv/linux/riscv/setcontext.S
index a2de57b537..11dd46ea17 100644
--- a/sysdeps/unix/sysv/linux/riscv/setcontext.S
+++ b/sysdeps/unix/sysv/linux/riscv/setcontext.S
@@ -110,6 +110,6 @@ LEAF (__start_context)
 	mv	a0, s2
 	beqz	s2, 1f
 	jal	HIDDEN_JUMPTARGET (__setcontext)
-1:	j	HIDDEN_JUMPTARGET (exit)
+1:	call	HIDDEN_JUMPTARGET (exit)
 
 END (__start_context)