The syscall call uses the 'tail' instruction call
If the 'j' command is used here,it cannot always be called.
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 'j' command, and when
the distance is greater than 1M, it will be compiled
into 'aupic' and 'jr' command.
Test: llvm-objdump -d
Change-Id: I53d8aa7f54b9c4c96fce491487dcba7b63348219
Signed-off-by: caowencheng <caowencheng@eswincomputing.com>
diff --git a/libc/tools/gensyscalls.py b/libc/tools/gensyscalls.py
index a525a98..558b004 100755
--- a/libc/tools/gensyscalls.py
+++ b/libc/tools/gensyscalls.py
@@ -93,7 +93,7 @@
ret
1:
neg a0, a0
- j __set_errno_internal
+ tail __set_errno_internal
END(%(func)s)
"""