1 /* Copyright (C) 2000-2014 Free Software Foundation, Inc.
2 Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
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.
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
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <http://www.gnu.org/licenses/>. */
20 #include <kernel-features.h>
26 /* Save registers and setup stack frame. */
28 cfi_offset (%r15, -36)
29 cfi_offset (%r14, -40)
30 cfi_offset (%r13, -44)
31 cfi_offset (%r12, -48)
32 cfi_offset (%r11, -52)
33 cfi_offset (%r10, -56)
39 ahi %r15,-120 /* buy stack space */
40 cfi_adjust_cfa_offset (120)
41 st %r1,0(%r15) /* store back chain */
43 /* Store parameters on stack, because mmap2
44 * takes only one parameter: a pointer to the parameter area
46 st %r6,0x70(%r15) /* Store 'fd'. */
47 st %r5,0x6C(%r15) /* Store 'flags'. */
48 st %r4,0x68(%r15) /* Store 'prot'. */
49 st %r3,0x64(%r15) /* Store 'length'. */
50 st %r2,0x60(%r15) /* Store 'start'. */
51 l %r1,216(%r15) /* Load offset. */
53 tml %r1,0x0fff /* Offset page aligned ? */
55 jnz 1f /* No -> EINVAL. */
56 srl %r1,12 /* mmap2 takes the offset in pages. */
57 st %r1,0x74(%r15) /* Store page offset. */
58 la %r2,0x60(%r15) /* Load address of parameter list. */
59 svc SYS_ify(mmap2) /* Do the system call trap. */
61 1: l %r15,0(%r15) /* Load back chain. */
62 cfi_adjust_cfa_offset (-120)
63 lm %r6,%r15,24(%r15) /* Load registers. */
65 /* check gpr 2 for error */
68 jnl SYSCALL_ERROR_LABEL
70 /* Successful; return the syscall's value. */
75 weak_alias (__mmap, mmap)