projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| f7a9f785 | 1 | /* Copyright (C) 2000-2016 Free Software Foundation, Inc. |
| 847b055c AJ |
2 | Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com). |
| 3 | This file is part of the GNU C Library. | |
| 4 | ||
| 5 | The GNU C Library is free software; you can redistribute it and/or | |
| 41bdb6e2 AJ |
6 | modify it under the terms of the GNU Lesser General Public |
| 7 | License as published by the Free Software Foundation; either | |
| 8 | version 2.1 of the License, or (at your option) any later version. | |
| 847b055c AJ |
9 | |
| 10 | The GNU C Library is distributed in the hope that it will be useful, | |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 41bdb6e2 | 13 | Lesser General Public License for more details. |
| 847b055c | 14 | |
| 41bdb6e2 | 15 | You should have received a copy of the GNU Lesser General Public |
| 59ba27a6 PE |
16 | License along with the GNU C Library; if not, see |
| 17 | <http://www.gnu.org/licenses/>. */ | |
| 847b055c AJ |
18 | |
| 19 | #include <sysdep.h> | |
| 20 | ||
| ffeac417 | 21 | #define EINVAL 22 |
| 847b055c | 22 | |
| 85599e53 | 23 | .text |
| 847b055c AJ |
24 | ENTRY(__mmap) |
| 25 | /* Save registers and setup stack frame. */ | |
| 26 | stm %r6,%r15,24(%r15) | |
| 844a34a2 UD |
27 | cfi_offset (%r15, -36) |
| 28 | cfi_offset (%r14, -40) | |
| 29 | cfi_offset (%r13, -44) | |
| 30 | cfi_offset (%r12, -48) | |
| 31 | cfi_offset (%r11, -52) | |
| 32 | cfi_offset (%r10, -56) | |
| 33 | cfi_offset (%r9, -60) | |
| 34 | cfi_offset (%r8, -64) | |
| 35 | cfi_offset (%r7, -68) | |
| 36 | cfi_offset (%r6, -72) | |
| 847b055c | 37 | lr %r1,%r15 |
| 847b055c | 38 | ahi %r15,-120 /* buy stack space */ |
| 844a34a2 | 39 | cfi_adjust_cfa_offset (120) |
| 85599e53 | 40 | st %r1,0(%r15) /* store back chain */ |
| 847b055c | 41 | |
| 348363b2 JM |
42 | /* Store parameters on stack, because mmap2 |
| 43 | * takes only one parameter: a pointer to the parameter area | |
| 847b055c | 44 | */ |
| 85599e53 UD |
45 | st %r6,0x70(%r15) /* Store 'fd'. */ |
| 46 | st %r5,0x6C(%r15) /* Store 'flags'. */ | |
| 47 | st %r4,0x68(%r15) /* Store 'prot'. */ | |
| 48 | st %r3,0x64(%r15) /* Store 'length'. */ | |
| 49 | st %r2,0x60(%r15) /* Store 'start'. */ | |
| 50 | l %r1,216(%r15) /* Load offset. */ | |
| 51 | ||
| 85599e53 UD |
52 | tml %r1,0x0fff /* Offset page aligned ? */ |
| 53 | lhi %r2,-EINVAL | |
| 54 | jnz 1f /* No -> EINVAL. */ | |
| 55 | srl %r1,12 /* mmap2 takes the offset in pages. */ | |
| 56 | st %r1,0x74(%r15) /* Store page offset. */ | |
| 57 | la %r2,0x60(%r15) /* Load address of parameter list. */ | |
| 58 | svc SYS_ify(mmap2) /* Do the system call trap. */ | |
| 85599e53 UD |
59 | |
| 60 | 1: l %r15,0(%r15) /* Load back chain. */ | |
| 844a34a2 | 61 | cfi_adjust_cfa_offset (-120) |
| 85599e53 | 62 | lm %r6,%r15,24(%r15) /* Load registers. */ |
| 847b055c AJ |
63 | |
| 64 | /* check gpr 2 for error */ | |
| 65 | lhi %r0,-4096 | |
| 66 | clr %r2,%r0 | |
| 67 | jnl SYSCALL_ERROR_LABEL | |
| 68 | ||
| 69 | /* Successful; return the syscall's value. */ | |
| 70 | br %r14 | |
| 71 | ||
| 72 | PSEUDO_END (__mmap) | |
| 73 | ||
| 74 | weak_alias (__mmap, mmap) |