ref: c67d39e69ed554efcd252af61179afa7a192ea1a
parent: 4792730ddf78a778496334c97709c1e0da06a61d
author: EC2 Default User <ec2-user@ip-172-31-17-35.ec2.internal>
date: Mon May 15 21:35:31 EDT 2017
Allow for a 7th syscall argument for mmap. ....but there aren't any 9th ones, right?
--- a/lib/sys/syscall+openbsd-x64.s
+++ b/lib/sys/syscall+openbsd-x64.s
@@ -15,6 +15,15 @@
movq 40(%rsp),%r10
movq 48(%rsp),%r8
movq 56(%rsp),%r9
+ /*
+ if there syscalls are more than 6
+ args (eg, mmap), the remaining args
+ are on the stack, with 8 dummy bytes
+ for a return address.
+ */
+ movq 64(%rsp),%rbx
+ pushq %rbx
+ pushq %rbx
syscall
jae .success
@@ -21,6 +30,7 @@
negq %rax
.success:
+ addq $16,%rsp
ret
/* __tfork_thread(tfp : tforkparams#, sz : size, fn : void#, arg : void#-> tid) */