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107 lines
2.2 KiB
D
107 lines
2.2 KiB
D
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// Copyright (C) 2001-2004 by Digital Mars, www.digitalmars.com
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// All Rights Reserved
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// Written by Walter Bright
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import std.c.linux.linuxextern;
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import std.c.linux.linux;
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/+
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extern (C)
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{
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// from <sys/mman.h>
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void* mmap(void* addr, uint len, int prot, int flags, int fd, uint offset);
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int munmap(void* addr, uint len);
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const void* MAP_FAILED = cast(void*)-1;
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// from <bits/mman.h>
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enum { PROT_NONE = 0, PROT_READ = 1, PROT_WRITE = 2, PROT_EXEC = 4 }
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enum { MAP_SHARED = 1, MAP_PRIVATE = 2, MAP_TYPE = 0x0F,
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MAP_FIXED = 0x10, MAP_FILE = 0, MAP_ANON = 0x20 }
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}
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+/
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/***********************************
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* Map memory.
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*/
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void *os_mem_map(uint nbytes)
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{ void *p;
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//errno = 0;
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p = mmap(null, nbytes, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANON, -1, 0);
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return (p == MAP_FAILED) ? null : p;
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}
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/***********************************
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* Commit memory.
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* Returns:
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* 0 success
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* !=0 failure
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*/
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int os_mem_commit(void *base, uint offset, uint nbytes)
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{
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return 0;
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}
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/***********************************
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* Decommit memory.
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* Returns:
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* 0 success
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* !=0 failure
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*/
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int os_mem_decommit(void *base, uint offset, uint nbytes)
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{
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return 0;
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}
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/***********************************
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* Unmap memory allocated with os_mem_map().
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* Returns:
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* 0 success
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* !=0 failure
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*/
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int os_mem_unmap(void *base, uint nbytes)
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{
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return munmap(base, nbytes);
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}
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/**********************************************
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* Determine "bottom" of stack (actually the top on x86 systems).
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*/
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void *os_query_stackBottom()
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{
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version (none)
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{ // See discussion: http://autopackage.org/forums/viewtopic.php?t=22
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static void** libc_stack_end;
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if (libc_stack_end == libc_stack_end.init)
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{
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void* handle = dlopen(null, RTLD_NOW);
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libc_stack_end = cast(void **)dlsym(handle, "__libc_stack_end");
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dlclose(handle);
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}
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return *libc_stack_end;
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}
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else
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{ // This doesn't resolve on all versions of Linux
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return __libc_stack_end;
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}
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}
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/**********************************************
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* Determine base address and size of static data segment.
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*/
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void os_query_staticdataseg(void **base, uint *nbytes)
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{
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*base = cast(void *)&__data_start;
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*nbytes = cast(byte *)&_end - cast(byte *)&__data_start;
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}
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