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BernardXiongBernardXiong
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[libc] Add mmap API
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6 files changed

+382
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‎components/libc/compilers/armlibc/sys/mman.h‎

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/*
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* File : mman.h
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2017, RT-Thread Development Team
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Change Logs:
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* Date Author Notes
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* 2017/11/30 Bernard The first version.
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*/
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#ifndef _SYS_MMAN_H
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#define _SYS_MMAN_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define MAP_FAILED ((void *) -1)
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#define MAP_SHARED 0x01
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#define MAP_PRIVATE 0x02
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#define MAP_TYPE 0x0f
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#define MAP_FIXED 0x10
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#define MAP_ANON 0x20
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#define MAP_ANONYMOUS MAP_ANON
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#define MAP_NORESERVE 0x4000
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#define MAP_GROWSDOWN 0x0100
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#define MAP_DENYWRITE 0x0800
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#define MAP_EXECUTABLE 0x1000
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#define MAP_LOCKED 0x2000
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#define MAP_POPULATE 0x8000
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#define MAP_NONBLOCK 0x10000
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#define MAP_STACK 0x20000
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#define MAP_HUGETLB 0x40000
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#define MAP_FILE 0
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#define PROT_NONE 0
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#define PROT_READ 1
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#define PROT_WRITE 2
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#define PROT_EXEC 4
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#define PROT_GROWSDOWN 0x01000000
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#define PROT_GROWSUP 0x02000000
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#define MS_ASYNC 1
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#define MS_INVALIDATE 2
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#define MS_SYNC 4
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#define MCL_CURRENT 1
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#define MCL_FUTURE 2
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#define MCL_ONFAULT 4
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void *mmap (void *start, size_t len, int prot, int flags, int fd, off_t off);
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int munmap (void *start, size_t len);
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#ifdef __cplusplus
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}
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#endif
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#endif

‎components/libc/compilers/dlib/sys/mman.h‎

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/*
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* File : mman.h
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2017, RT-Thread Development Team
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Change Logs:
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* Date Author Notes
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* 2017/11/30 Bernard The first version.
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*/
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#ifndef _SYS_MMAN_H
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#define _SYS_MMAN_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define MAP_FAILED ((void *) -1)
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#define MAP_SHARED 0x01
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#define MAP_PRIVATE 0x02
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#define MAP_TYPE 0x0f
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#define MAP_FIXED 0x10
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#define MAP_ANON 0x20
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#define MAP_ANONYMOUS MAP_ANON
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#define MAP_NORESERVE 0x4000
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#define MAP_GROWSDOWN 0x0100
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#define MAP_DENYWRITE 0x0800
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#define MAP_EXECUTABLE 0x1000
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#define MAP_LOCKED 0x2000
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#define MAP_POPULATE 0x8000
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#define MAP_NONBLOCK 0x10000
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#define MAP_STACK 0x20000
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#define MAP_HUGETLB 0x40000
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#define MAP_FILE 0
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#define PROT_NONE 0
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#define PROT_READ 1
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#define PROT_WRITE 2
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#define PROT_EXEC 4
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#define PROT_GROWSDOWN 0x01000000
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#define PROT_GROWSUP 0x02000000
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#define MS_ASYNC 1
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#define MS_INVALIDATE 2
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#define MS_SYNC 4
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#define MCL_CURRENT 1
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#define MCL_FUTURE 2
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#define MCL_ONFAULT 4
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void *mmap (void *start, size_t len, int prot, int flags, int fd, off_t off);
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int munmap (void *start, size_t len);
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#ifdef __cplusplus
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}
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#endif
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#endif

‎components/libc/compilers/minilibc/sys/mman.h‎

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/*
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* File : mman.h
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2017, RT-Thread Development Team
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Change Logs:
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* Date Author Notes
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* 2017/11/30 Bernard The first version.
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*/
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#ifndef _SYS_MMAN_H
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#define _SYS_MMAN_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define MAP_FAILED ((void *) -1)
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#define MAP_SHARED 0x01
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#define MAP_PRIVATE 0x02
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#define MAP_TYPE 0x0f
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#define MAP_FIXED 0x10
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#define MAP_ANON 0x20
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#define MAP_ANONYMOUS MAP_ANON
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#define MAP_NORESERVE 0x4000
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#define MAP_GROWSDOWN 0x0100
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#define MAP_DENYWRITE 0x0800
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#define MAP_EXECUTABLE 0x1000
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#define MAP_LOCKED 0x2000
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#define MAP_POPULATE 0x8000
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#define MAP_NONBLOCK 0x10000
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#define MAP_STACK 0x20000
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#define MAP_HUGETLB 0x40000
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#define MAP_FILE 0
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#define PROT_NONE 0
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#define PROT_READ 1
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#define PROT_WRITE 2
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#define PROT_EXEC 4
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#define PROT_GROWSDOWN 0x01000000
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#define PROT_GROWSUP 0x02000000
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#define MS_ASYNC 1
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#define MS_INVALIDATE 2
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#define MS_SYNC 4
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#define MCL_CURRENT 1
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#define MCL_FUTURE 2
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#define MCL_ONFAULT 4
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void *mmap (void *start, size_t len, int prot, int flags, int fd, off_t off);
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int munmap (void *start, size_t len);
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#ifdef __cplusplus
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}
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#endif
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#endif

‎components/libc/compilers/newlib/sys/mman.h‎

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/*
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* File : mman.h
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2017, RT-Thread Development Team
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Change Logs:
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* Date Author Notes
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* 2017/11/30 Bernard The first version.
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*/
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#ifndef _SYS_MMAN_H
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#define _SYS_MMAN_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define MAP_FAILED ((void *) -1)
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#define MAP_SHARED 0x01
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#define MAP_PRIVATE 0x02
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#define MAP_TYPE 0x0f
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#define MAP_FIXED 0x10
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#define MAP_ANON 0x20
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#define MAP_ANONYMOUS MAP_ANON
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#define MAP_NORESERVE 0x4000
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#define MAP_GROWSDOWN 0x0100
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#define MAP_DENYWRITE 0x0800
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#define MAP_EXECUTABLE 0x1000
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#define MAP_LOCKED 0x2000
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#define MAP_POPULATE 0x8000
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#define MAP_NONBLOCK 0x10000
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#define MAP_STACK 0x20000
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#define MAP_HUGETLB 0x40000
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#define MAP_FILE 0
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#define PROT_NONE 0
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#define PROT_READ 1
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#define PROT_WRITE 2
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#define PROT_EXEC 4
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#define PROT_GROWSDOWN 0x01000000
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#define PROT_GROWSUP 0x02000000
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#define MS_ASYNC 1
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#define MS_INVALIDATE 2
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#define MS_SYNC 4
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#define MCL_CURRENT 1
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#define MCL_FUTURE 2
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#define MCL_ONFAULT 4
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void *mmap (void *start, size_t len, int prot, int flags, int fd, off_t off);
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int munmap (void *start, size_t len);
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#ifdef __cplusplus
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}
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#endif
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#endif

‎components/libc/mmap/SConscript‎

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# RT-Thread building script for component
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from building import *
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cwd = GetCurrentDir()
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src = Glob('*.c') + Glob('*.cpp')
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CPPPATH = [cwd]
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group = DefineGroup('libc', src,
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depend = ['RT_USING_DFS', 'RT_USING_POSIX_MMAP'],
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CPPPATH = CPPPATH)
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Return('group')

‎components/libc/mmap/posix_mmap.c‎

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/*
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* File : posix_mmap.c
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2017, RT-Thread Development Team
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*
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* This program is free software; you can redistribute it and/or modify
7+
* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
9+
* (at your option) any later version.
10+
*
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* This program 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
14+
* GNU General Public License for more details.
15+
*
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* You should have received a copy of the GNU General Public License along
17+
* with this program; if not, write to the Free Software Foundation, Inc.,
18+
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Change Logs:
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* Date Author Notes
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* 2017/11/30 Bernard The first version.
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*/
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#include <stdint.h>
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#include <stdio.h>
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#include <rtthread.h>
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#include <dfs_posix.h>
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#include <sys/mman.h>
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void *mmap(void *addr, size_t length, int prot, int flags,
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int fd, off_t offset)
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{
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uint8_t *mem;
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if (addr)
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{
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mem = addr;
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}
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else mem = (uint8_t *)malloc(length);
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if (mem)
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{
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off_t cur;
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size_t read_bytes;
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cur = lseek(fd, 0, SEEK_SET);
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lseek(fd, offset, SEEK_SET);
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read_bytes = read(fd, addr, length);
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if (read_bytes != length)
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{
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if (addr == RT_NULL)
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{
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/* read failed */
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free(mem);
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mem = RT_NULL;
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}
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}
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lseek(fd, cur, SEEK_SET);
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return mem;
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}
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errno = ENOMEM;
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return MAP_FAILED;
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}
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int munmap(void *addr, size_t length)
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{
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if (addr)
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{
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free(addr);
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return 0;
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}
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return -1;
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}

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