commit d27c83fbd443df4ace8853653fb82e1c20623d92
author caowencheng <caowencheng@eswincomputing.com> Tue Mar 07 14:05:34 2023 +0800
committer wencheng cao <caowencheng@eswincomputing.com> Wed Mar 08 01:44:50 2023 +0000
tree 33f426747fdcb1227c1d44e46f73d18e02d8b56f
parent 78f71a53e51b459fd42f34bcc1359afbc5551f38

Fix the compile errors "R_RISCV_JAL out of rang" when the jump range is greater than 1M memory space between vfork and  __set_errno_internal

the "tail" command is used here, let the compiler decide
which instruction to use. when the call distance is less
than 1M, it will be compiled into "jr" command, and when
the distance is greater than 1M, it will be compiled
into "aupic" and "jr" command.

Test: make libc
Change-Id: I80d099d25c7cc2439a297d8afc65abeb5a7a360c
Signed-off-by: caowencheng <caowencheng@eswincomputing.com>

libc/arch-riscv64/bionic/vfork.S

diff --git a/libc/arch-riscv64/bionic/vfork.S b/libc/arch-riscv64/bionic/vfork.S
index 0eff9e9..29ab405 100644
--- a/libc/arch-riscv64/bionic/vfork.S
+++ b/libc/arch-riscv64/bionic/vfork.S
@@ -62,5 +62,5 @@
 
 .L_failure:
   neg     a0, a0
-  j       __set_errno_internal
+  tail    __set_errno_internal
 END(vfork)