diff options
| author | Mike Frysinger <vapier@gentoo.org> | 2005-09-07 22:16:43 +0000 |
|---|---|---|
| committer | Mike Frysinger <vapier@gentoo.org> | 2005-09-07 22:16:43 +0000 |
| commit | 27f04c4b3ed2ec3d3469615d303e41ed61b1c32f (patch) | |
| tree | 08df2c091e379682dda6346275d4588426b09de4 | |
| parent | bc5829aeab779ceb1389e218e641f14412483f16 (diff) | |
grab a tiny mmap implementation from glibc
| -rw-r--r-- | libc/sysdeps/linux/i386/Makefile | 2 | ||||
| -rw-r--r-- | libc/sysdeps/linux/i386/mmap.S | 49 |
2 files changed, 50 insertions, 1 deletions
diff --git a/libc/sysdeps/linux/i386/Makefile b/libc/sysdeps/linux/i386/Makefile index e7cee0c0b..bde820b2b 100644 --- a/libc/sysdeps/linux/i386/Makefile +++ b/libc/sysdeps/linux/i386/Makefile @@ -25,7 +25,7 @@ SCRT_OBJ = $(patsubst %,S%, $(CRT_OBJ)) CTOR_TARGETS=$(TOPDIR)lib/crti.o $(TOPDIR)lib/crtn.o SSRC=__longjmp.S vfork.S clone.S setjmp.S bsd-setjmp.S \ - bsd-_setjmp.S syscall.S mmap64.S + bsd-_setjmp.S syscall.S mmap.S mmap64.S SOBJS=$(patsubst %.S,%.o, $(SSRC)) CSRC=brk.c sigaction.c __syscall_error.c diff --git a/libc/sysdeps/linux/i386/mmap.S b/libc/sysdeps/linux/i386/mmap.S new file mode 100644 index 000000000..5dde939bf --- /dev/null +++ b/libc/sysdeps/linux/i386/mmap.S @@ -0,0 +1,49 @@ +/* Copyright (C) 1995,96,97,98,99,2000,2002,2005 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 + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#define _ERRNO_H 1 +#include <features.h> +#include <bits/errno.h> +#include <sys/syscall.h> + +.text +.global mmap +.type mmap,%function +mmap: + + /* Save registers. */ + movl %ebx, %edx + + movl $__NR_mmap, %eax /* System call number in %eax. */ + + lea 4(%esp), %ebx /* Address of args is 1st arg. */ + + /* Do the system call trap. */ + int $0x80 + + /* Restore registers. */ + movl %edx, %ebx + + /* If 0 > %eax > -4096 there was an error. */ + cmpl $-4096, %eax + ja __syscall_error + + /* Successful; return the syscall's value. */ + ret + +.size mmap,.-mmap |