1 /* Copyright (C) 2000, 2001, 2007 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, write to the Free
17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
21 #include <kernel-features.h>
28 /* Save registers and setup stack frame. */
30 cfi_offset (%r15, -36)
31 cfi_offset (%r14, -40)
32 cfi_offset (%r13, -44)
33 cfi_offset (%r12, -48)
34 cfi_offset (%r11, -52)
35 cfi_offset (%r10, -56)
41 ahi %r15,-120 /* Buy stack space. */
42 cfi_adjust_cfa_offset (120)
43 st %r1,0(%r15) /* Store back chain. */
45 /* Store parameters on stack, because mmap2 and old_mmap
46 * take only one parameter: a pointer to the parameter area. */
47 st %r6,0x70(%r15) /* Store 'fd'. */
48 st %r5,0x6C(%r15) /* Store 'flags'. */
49 st %r4,0x68(%r15) /* Store 'prot'. */
50 st %r3,0x64(%r15) /* Store 'length'. */
51 st %r2,0x60(%r15) /* Store 'start'. */
54 lm %r0,%r1,216(%r15) /* Load 64 bit offset. */
55 tml %r1,0x0fff /* Offset page aligned ? */
56 jnz 2f /* No -> EINVAL. */
57 srdl %r0,12 /* mmap2 takes the offset in pages. */
58 ltr %r0,%r0 /* Offset > 2^44 ? */
60 st %r1,0x74(%r15) /* Store page offset. */
62 la %r2,0x60(%r15) /* Load address of parameter list. */
63 svc SYS_ify(mmap2) /* Do the system call trap. */
65 #ifndef __ASSUME_MMAP2_SYSCALL
70 l %r15,0(%r15) /* Load back chain. */
71 cfi_adjust_cfa_offset (-120)
72 lm %r6,%r15,24(%r15) /* Load registers. */
74 /* Check gpr 2 for error. */
77 jnl SYSCALL_ERROR_LABEL
79 /* Successful; return the syscall's value. */
84 #if !defined __ASSUME_MMAP2_SYSCALL || !defined __NR_mmap2
85 1: lm %r0,%r1,216(%r15) /* Load 64 bit offset. */
86 st %r1,0x74(%r15) /* Store lower word of offset. */
87 ltr %r0,%r0 /* Offset > 2^32 ? */
89 alr %r1,%r3 /* Add length to offset. */
90 brc 3,2f /* Carry -> EINVAL. */
92 la %r2,0x60(%r15) /* Load address of parameter list. */
93 svc SYS_ify(mmap) /* Do the system call trap. */
95 l %r15,0(%r15) /* Load back chain. */
96 lm %r6,%r15,24(%r15) /* Load registers. */
98 /* Check gpr 2 for error. */
101 jnl SYSCALL_ERROR_LABEL
103 /* Successful; return the syscall's value. */
108 l %r15,0(%r15) /* Load back chain. */
109 lm %r6,%r15,24(%r15) /* Load registers. */
110 j SYSCALL_ERROR_LABEL
112 PSEUDO_END (__mmap64)
114 weak_alias (__mmap64, mmap64)