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79 lines
2.7 KiB
ArmAsm
79 lines
2.7 KiB
ArmAsm
/* Wrapper around mmap system call. 64 bit S/390 version.
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Copyright (C) 2001-2016 Free Software Foundation, Inc.
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Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <sysdep.h>
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#define EINVAL 22
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.text
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ENTRY(__mmap)
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/* Save registers and setup stack frame. */
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stmg %r6,%r15,48(%r15)
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cfi_offset (%r15,-40)
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cfi_offset (%r14,-48)
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cfi_offset (%r13,-56)
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cfi_offset (%r12,-64)
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cfi_offset (%r11,-72)
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cfi_offset (%r10,-80)
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cfi_offset (%r9,-88)
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cfi_offset (%r8,-96)
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cfi_offset (%r7,-104)
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cfi_offset (%r6,-112)
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lgr %r1,%r15
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lg %r0,8(%r15) /* Load eos. */
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aghi %r15,-208 /* Buy stack space. */
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cfi_adjust_cfa_offset (208)
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stg %r1,0(%r15) /* Store back chain. */
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stg %r0,8(%r15) /* Store eos. */
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/* Store parameters on stack, because old_mmap
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takes only one parameter: a pointer to the parameter area. */
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mvc 200(8,%r15),368(%r15) /* Move 'offset'. */
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lgfr %r6,%r6
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stg %r6,192(%r15) /* Store 'fd'. */
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lgfr %r5,%r5
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stg %r5,184(%r15) /* Store 'flags'. */
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lgfr %r4,%r4
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stg %r4,176(%r15) /* Store 'prot'. */
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stg %r3,168(%r15) /* Store 'length'. */
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stg %r2,160(%r15) /* Store 'start'. */
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la %r2,160(%r15) /* Load address of parameter list. */
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/* Do the system call trap. */
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svc SYS_ify(mmap)
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lg %r15,0(%r15) /* Load back chain. */
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cfi_adjust_cfa_offset (-208)
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lmg %r6,%r15,48(%r15) /* Load registers. */
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/* Check gpr 2 for error. */
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lghi %r0,-4096
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clgr %r2,%r0
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jgnl SYSCALL_ERROR_LABEL
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/* Successful; return the syscall's value. */
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br %r14
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PSEUDO_END (__mmap)
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weak_alias (__mmap, mmap)
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weak_alias (__mmap, mmap64)
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weak_alias (__mmap, __mmap64)
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