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2005-09-16 Maciej W. Rozycki <macro@linux-mips.org>

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[BZ #933]
	* sysdeps/unix/sysv/linux/mips/brk.c (__brk): Load the number of
	the syscall immediately before invocation.
	* sysdeps/unix/sysv/linux/mips/mips64/n64/ioctl.S (__ioctl): Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/syscall.S (syscall): Likewise.

	* sysdeps/unix/sysv/linux/mips/mips64/n64/ioctl.S (__ioctl): Use
	macros to handle GP.
	* sysdeps/unix/sysv/linux/mips/mips64/syscall.S (syscall):
	Likewise.  Update inaccurate comments.
This commit is contained in:
Andreas Jaeger 2005-09-16 12:20:48 +00:00
parent eb4e0abb40
commit ea78d8fa65
3 changed files with 27 additions and 19 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
sysdeps/unix/sysv/linux/mips/brk.c
View File

@ -1,5 +1,5 @@
/* brk system call for Linux/MIPS.
Copyright (C) 2000 Free Software Foundation, Inc.
Copyright (C) 2000, 2005 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@ -37,9 +37,10 @@ __brk (void *addr)
register long int res __asm__ ("$2");
asm ("move\t$4,%2\n\t"
"li\t%0,%1\n\t"
"syscall" /* Perform the system call. */
: "=r" (res)
: "0" (SYS_ify (brk)), "r" (addr)
: "I" (SYS_ify (brk)), "r" (addr)
: "$4", "$7");
newbrk = (void *) res;
}

10
sysdeps/unix/sysv/linux/mips/mips64/n64/ioctl.S
View File

@ -1,4 +1,4 @@
/* Copyright 2003 Free Software Foundation, Inc.
/* Copyright 2003, 2005 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@ -25,16 +25,16 @@
.text
ENTRY (__ioctl)
sll a1, a1, 0
li v0, __NR_ioctl
sll a1,a1,0
syscall /* Do the system call. */
bne a3, zero, L(error)
ret
L(error):
.cpsetup t9, a0, __ioctl
PTR_LA t9,__syscall_error
.cprestore
SETUP_GP64 (a0, __ioctl)
PTR_LA t9, __syscall_error
RESTORE_GP64
jr t9
PSEUDO_END (__ioctl)

31
sysdeps/unix/sysv/linux/mips/mips64/syscall.S
View File

@ -1,4 +1,4 @@
/* Copyright (C) 2001, 2002, 2003 Free Software Foundation, Inc.
/* Copyright (C) 2001, 2002, 2003, 2005 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@ -20,17 +20,20 @@
#include <sys/asm.h>
/* Please consult the file sysdeps/unix/sysv/linux/x86-64/sysdep.h for
more information about the value -4095 used below. */
/* Usage:
long syscall (syscall_number, arg1, arg2, arg3, arg4, arg5, arg6, arg7)
/* Usage: long syscall (syscall_number, arg1, arg2, arg3, arg4, arg5)
We need to do some arg shifting, the syscall_number will be in
rax. */
We need to do some arg shifting, syscall_number will be in v0. */
.text
ENTRY (syscall)
move v0, a0 /* Syscall number -> v0 */
NESTED (syscall, SZREG, ra)
.mask 0x00010000, -SZREG
.fmask 0x00000000, 0
PTR_ADDIU sp, -SZREG
REG_S s0, (sp)
move s0, a0
move a0, a1 /* shift arg1 - arg7. */
move a1, a2
move a2, a3
@ -39,15 +42,19 @@ ENTRY (syscall)
move a5, a6
move a6, a7
move v0, s0 /* Syscall number -> v0 */
syscall /* Do the system call. */
REG_L s0, (sp)
PTR_ADDIU sp, SZREG
bne a3, zero, L(error)
ret
L(error):
.cpsetup t9, a0, syscall
PTR_LA t9,__syscall_error
.cprestore
SETUP_GP64 (a0, syscall)
PTR_LA t9, __syscall_error
RESTORE_GP64
jr t9
PSEUDO_END (syscall)
END (syscall)