projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| ffeac417 UD |
1 | /* Wrapper around mmap system call. 64 bit S/390 version. |
| 2 | Copyright (C) 2001 Free Software Foundation, Inc. | |
| 3 | Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com). | |
| 4 | This file is part of the GNU C Library. | |
| 5 | ||
| 6 | The GNU C Library is free software; you can redistribute it and/or | |
| 41bdb6e2 AJ |
7 | modify it under the terms of the GNU Lesser General Public |
| 8 | License as published by the Free Software Foundation; either | |
| 9 | version 2.1 of the License, or (at your option) any later version. | |
| ffeac417 UD |
10 | |
| 11 | The GNU C Library is distributed in the hope that it will be useful, | |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 41bdb6e2 | 14 | Lesser General Public License for more details. |
| ffeac417 | 15 | |
| 41bdb6e2 AJ |
16 | You should have received a copy of the GNU Lesser General Public |
| 17 | License along with the GNU C Library; if not, write to the Free | |
| 18 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
| 19 | 02111-1307 USA. */ | |
| ffeac417 UD |
20 | |
| 21 | #include <sysdep.h> | |
| 22 | ||
| 23 | #define EINVAL 22 | |
| 24 | ||
| 25 | .text | |
| 26 | ||
| 27 | ENTRY(__mmap) | |
| 28 | /* Save registers and setup stack frame. */ | |
| 29 | stmg %r6,%r15,48(%r15) | |
| 30 | lgr %r1,%r15 | |
| 31 | lg %r0,8(%r15) /* Load eos. */ | |
| 32 | aghi %r15,-208 /* Buy stack space. */ | |
| 33 | stg %r1,0(%r15) /* Store back chain. */ | |
| 34 | stg %r0,8(%r15) /* Store eos. */ | |
| 35 | ||
| 36 | /* Store parameters on stack, because old_mmap | |
| 37 | takes only one parameter: a pointer to the parameter area. */ | |
| 38 | mvc 200(8,%r15),368(%r15) /* Move 'offset'. */ | |
| 39 | lgfr %r6,%r6 | |
| 40 | stg %r6,192(%r15) /* Store 'fd'. */ | |
| 41 | lgfr %r5,%r5 | |
| 42 | stg %r5,184(%r15) /* Store 'flags'. */ | |
| 43 | lgfr %r4,%r4 | |
| 44 | stg %r4,176(%r15) /* Store 'prot'. */ | |
| 45 | stg %r3,168(%r15) /* Store 'length'. */ | |
| 46 | stg %r2,160(%r15) /* Store 'start'. */ | |
| 47 | ||
| 48 | la %r2,160(%r15) /* Load address of parameter list. */ | |
| 49 | /* Do the system call trap. */ | |
| 50 | svc SYS_ify(mmap) | |
| 51 | ||
| 52 | lg %r15,0(%r15) /* Load back chain. */ | |
| 53 | lmg %r6,%r15,48(%r15) /* Load registers. */ | |
| 54 | ||
| 55 | /* Check gpr 2 for error. */ | |
| 56 | lghi %r0,-4096 | |
| 57 | clgr %r2,%r0 | |
| 58 | jnl SYSCALL_ERROR_LABEL | |
| 59 | ||
| 60 | /* Successful; return the syscall's value. */ | |
| 61 | br %r14 | |
| 62 | ||
| 63 | PSEUDO_END (__mmap) | |
| 64 | ||
| 65 | weak_alias (__mmap, mmap) | |
| 66 | weak_alias (__mmap, mmap64) | |
| d555194c | 67 | weak_alias (__mmap, __mmap64) |