| 1 | /* |
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| 2 | * sys_munmap.c - unmap a mapping from process virtual address space |
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| 3 | * |
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| 4 | * Authors Ghassan Almaless (2008,2009,2010,2011,2012) |
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| 5 | * Alain Greiner (2016,2017,2018) |
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| 6 | * |
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| 7 | * Copyright (c) UPMC Sorbonne Universites |
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| 8 | * |
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| 9 | * This file is part of ALMOS-MKH. |
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| 10 | * |
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| 11 | * ALMOS-MKH is free software; you can redistribute it and/or modify it |
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| 12 | * under the terms of the GNU General Public License as published by |
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| 13 | * the Free Software Foundation; version 2.0 of the License. |
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| 14 | * |
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| 15 | * ALMOS-MKH is distributed in the hope that it will be useful, but |
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| 16 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 18 | * General Public License for more details. |
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| 19 | * |
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| 20 | * You should have received a copy of the GNU General Public License |
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| 21 | * along with ALMOS-MKH; if not, write to the Free Software Foundation, |
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| 22 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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| 23 | */ |
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| 24 | |
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| 25 | #include <hal_kernel_types.h> |
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| 26 | #include <hal_uspace.h> |
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| 27 | #include <shared_syscalls.h> |
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| 28 | #include <errno.h> |
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| 29 | #include <thread.h> |
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| 30 | #include <printk.h> |
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| 31 | #include <mapper.h> |
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| 32 | #include <vfs.h> |
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| 33 | #include <process.h> |
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| 34 | #include <vmm.h> |
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| 35 | |
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| 36 | #include <syscalls.h> |
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| 37 | |
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| 38 | //////////////////////////////// |
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| 39 | int sys_munmap( void * vaddr, |
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| 40 | uint32_t size ) |
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| 41 | { |
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| 42 | error_t error; |
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| 43 | |
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| 44 | thread_t * this = CURRENT_THREAD; |
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| 45 | process_t * process = this->process; |
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| 46 | |
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| 47 | #if DEBUG_SYS_MUNMAP |
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| 48 | uint64_t tm_start; |
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| 49 | uint64_t tm_end; |
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| 50 | tm_start = hal_get_cycles(); |
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| 51 | if( DEBUG_SYS_MUNMAP < tm_start ) |
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| 52 | printk("\n[DBG] %s : thread %x enter / process %x / cycle %d\n" |
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| 53 | __FUNCTION__ , this, process->pid, (uint32_t)tm_start ); |
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| 54 | #endif |
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| 55 | |
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| 56 | // call relevant kernel function |
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| 57 | error = vmm_resize_vseg( process , (intptr_t)vaddr , (intptr_t)size ); |
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| 58 | |
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| 59 | if ( error ) |
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| 60 | { |
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| 61 | |
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| 62 | #if DEBUG_SYSCALLS_ERROR |
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| 63 | printk("\n[ERROR] in %s : cannot remove mapping\n", __FUNCTION__ ); |
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| 64 | #endif |
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| 65 | this->errno = EINVAL; |
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| 66 | return -1; |
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| 67 | } |
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| 68 | |
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| 69 | #if DEBUG_SYS_MUNMAP |
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| 70 | tm_end = hal_get_cycles(); |
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| 71 | if( DEBUG_SYS_MUNMAP < tm_start ) |
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| 72 | printk("\n[DBG] %s : thread %x exit / process %x / cycle %d\n" |
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| 73 | __FUNCTION__ , this, process->pid, (uint32_t)tm_end ); |
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| 74 | #endif |
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| 75 | |
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| 76 | return 0; |
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| 77 | |
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| 78 | } // end sys_munmap() |
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| 79 | |
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