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#
# arch/alpha/sysdual.S
#
#
# Some system calls have an alternate return value in r20 (a4).
# This system call stub is for system calls where that is
# the "real" return value.
#
#include <machine/asm.h>
.text
.align 3
.type __syscall_dual1,@function
.ent __syscall_dual1, 0
.globl __syscall_dual1
__syscall_dual1:
.frame sp,0,ra,0
callsys
beq a3, 1f
br pv, 2f # pv <- pc
2:
ldgp gp, 0(pv)
lda a1, errno
stl v0, 0(a1)
lda a4, -1(zero)
1:
mov a4, v0
ret zero,(ra),1
.size __syscall_dual1,.-__syscall_dual1
.end __syscall_dual1
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