projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| a334319f | 1 | /* Copyright (C) 1995,96,97,98,99,2000,2002 Free Software Foundation, Inc. |
| ae1025be | 2 | This file is part of the GNU C Library. |
| 28f540f4 | 3 | |
| ae1025be | 4 | The GNU C Library is free software; you can redistribute it and/or |
| 41bdb6e2 AJ |
5 | modify it under the terms of the GNU Lesser General Public |
| 6 | License as published by the Free Software Foundation; either | |
| 7 | version 2.1 of the License, or (at your option) any later version. | |
| 28f540f4 | 8 | |
| ae1025be UD |
9 | The GNU C Library is distributed in the hope that it will be useful, |
| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 41bdb6e2 | 12 | Lesser General Public License for more details. |
| 28f540f4 | 13 | |
| 41bdb6e2 AJ |
14 | You should have received a copy of the GNU Lesser General Public |
| 15 | License along with the GNU C Library; if not, write to the Free | |
| 16 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
| 17 | 02111-1307 USA. */ | |
| 28f540f4 RM |
18 | |
| 19 | #include <sysdep.h> | |
| 20 | ||
| a334319f | 21 | #include "kernel-features.h" |
| d587d83b UD |
22 | |
| 23 | #define EINVAL 22 | |
| 24 | ||
| c14e4c32 | 25 | .text |
| d2f5be2a UD |
26 | |
| 27 | ENTRY (__mmap) | |
| 28 | ||
| a334319f | 29 | /* I don't think it is worthwhile trzing to use mmap2 whenever it |
| d587d83b UD |
30 | is available. Only use it when we are sure the syscall exists. */ |
| 31 | #ifdef __ASSUME_MMAP2_SYSCALL | |
| 32 | ||
| 33 | /* Save registers. */ | |
| 34 | pushl %ebp | |
| 35 | pushl %ebx | |
| 36 | pushl %esi | |
| 37 | pushl %edi | |
| 38 | ||
| d587d83b UD |
39 | movl 20(%esp), %ebx |
| 40 | movl 24(%esp), %ecx | |
| 41 | movl 28(%esp), %edx | |
| 42 | movl 32(%esp), %esi | |
| 43 | movl 36(%esp), %edi | |
| 44 | movl 40(%esp), %ebp | |
| b0af120f | 45 | testl $0xfff, %ebp |
| 29b3c4f2 UD |
46 | movl $-EINVAL, %eax |
| 47 | jne L(skip) | |
| d587d83b UD |
48 | shrl $12, %ebp /* mmap2 takes the offset in pages. */ |
| 49 | ||
| 29b3c4f2 UD |
50 | movl $SYS_ify(mmap2), %eax /* System call number in %eax. */ |
| 51 | ||
| d587d83b | 52 | /* Do the system call trap. */ |
| f051627f | 53 | ENTER_KERNEL |
| 29b3c4f2 | 54 | L(skip): |
| d587d83b UD |
55 | /* Restore registers. */ |
| 56 | popl %edi | |
| 57 | popl %esi | |
| 58 | popl %ebx | |
| 59 | popl %ebp | |
| 60 | ||
| 61 | #else | |
| 62 | ||
| d2f5be2a UD |
63 | /* Save registers. */ |
| 64 | movl %ebx, %edx | |
| 65 | ||
| 66 | movl $SYS_ify(mmap), %eax /* System call number in %eax. */ | |
| 67 | ||
| 68 | lea 4(%esp), %ebx /* Address of args is 1st arg. */ | |
| 69 | ||
| ae1025be | 70 | /* Do the system call trap. */ |
| d2f5be2a UD |
71 | int $0x80 |
| 72 | ||
| 73 | /* Restore registers. */ | |
| 74 | movl %edx, %ebx | |
| 75 | ||
| d587d83b UD |
76 | #endif |
| 77 | ||
| 57ba7bb4 UD |
78 | /* If 0 > %eax > -4096 there was an error. */ |
| 79 | cmpl $-4096, %eax | |
| c0fb8a56 | 80 | ja SYSCALL_ERROR_LABEL |
| d2f5be2a UD |
81 | |
| 82 | /* Successful; return the syscall's value. */ | |
| 8fb3e007 | 83 | L(pseudo_end): |
| d2f5be2a | 84 | ret |
| 6ed0492f UD |
85 | |
| 86 | PSEUDO_END (__mmap) | |
| d2f5be2a UD |
87 | |
| 88 | weak_alias (__mmap, mmap) |