Date: Tue, 29 Apr 2003 12:10:34 -0700 (PDT) From: Peter Wemm <peter@FreeBSD.org> To: Perforce Change Reviews <perforce@freebsd.org> Subject: PERFORCE change 30039 for review Message-ID: <200304291910.h3TJAYCY076442@repoman.freebsd.org>
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http://perforce.freebsd.org/chv.cgi?CH=30039 Change 30039 by peter@peter_daintree on 2003/04/29 12:10:15 take advantage of the kernel preserving %rdi across a syscall Affected files ... .. //depot/projects/hammer/lib/libc/x86_64/sys/pipe.S#6 edit Differences ... ==== //depot/projects/hammer/lib/libc/x86_64/sys/pipe.S#6 (text+ko) ==== @@ -42,20 +42,8 @@ #include "SYS.h" - .weak _pipe - .set _pipe,__sys_pipe - .weak pipe - .set pipe,__sys_pipe -ENTRY(__sys_pipe) - pushq %rdi - mov $SYS_pipe,%rax - KERNCALL - jb 1f - popq %rcx - movl %eax,(%rcx) - movl %edx,4(%rcx) +SYSCALL(pipe) + movl %eax,(%rdi) /* %rdi is preserved by syscall */ + movl %edx,4(%rdi) movq $0,%rax ret -1: - popq %rdi - jmp PIC_PLT(HIDENAME(cerror))
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