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Diffstat (limited to 'libgloss/epiphany/sbrk.c')
| -rw-r--r-- | libgloss/epiphany/sbrk.c | 165 |
1 files changed, 0 insertions, 165 deletions
diff --git a/libgloss/epiphany/sbrk.c b/libgloss/epiphany/sbrk.c deleted file mode 100644 index 4880c0f8c..000000000 --- a/libgloss/epiphany/sbrk.c +++ /dev/null @@ -1,165 +0,0 @@ -/* EPIPHANY implementation of _sbrk () - - Copyright (c) 2011, Adapteva, Inc. - All rights reserved. - - Contributor Jeremy Bennett <jeremy.bennett@embecosm.com> for Adapteva Inc - - Redistribution and use in source and binary forms, with or without - modification, are permitted provided that the following conditions are met: - * Redistributions of source code must retain the above copyright notice, - this list of conditions and the following disclaimer. - * Redistributions in binary form must reproduce the above copyright - notice, this list of conditions and the following disclaimer in the - documentation and/or other materials provided with the distribution. - * Neither the name of Adapteva nor the names of its contributors may be - used to endorse or promote products derived from this software without - specific prior written permission. - - THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" - AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE - LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR - CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF - SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS - INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN - CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) - ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE - POSSIBILITY OF SUCH DAMAGE. */ -/* ------------------------------------------------------------------------- */ -/* This implementation is suitable for use with the Verilator simulation of - the EPIPHANY. - - Commenting suitable for processing by Doxygen is provided throughout. */ -/* ------------------------------------------------------------------------- */ -#include <sys/types.h> -#include <errno.h> -#include <stddef.h> - -/* ------------------------------------------------------------------------- */ -/*!Increase program data space - - This is a minimal implementation. Assuming the heap is growing upwards - from __heap_start towards __heap_end. - See linker file for definition. - - @param[in] incr The number of bytes to increment the stack by. - - @return A pointer to the start of the new block of memory */ -/* ------------------------------------------------------------------------- */ -void * -_sbrk (int incr) -{ - extern char __heap_start;//set by linker - extern char __heap_end;//set by linker - - static char *heap_end; /* Previous end of heap or 0 if none */ - char *prev_heap_end; - - if (0 == heap_end) { - heap_end = &__heap_start; /* Initialize first time round */ - } - - prev_heap_end = heap_end; - heap_end += incr; - //check - if( heap_end < (&__heap_end)) { - - } else { - errno = ENOMEM; - return (char*)-1; - } - return (void *) prev_heap_end; - -} /* _sbrk () */ - - - -///* sbrk support */ -// -///* The current plan is to have one sbrk handler for all cpus. -// Hence use `asm' for each global variable here to avoid the cpu prefix. -// We can't intrude on the user's namespace (another reason to use asm). */ -// -//#include <sys/types.h> -///*#include <sys/syscall.h>*/ -//#include <errno.h> -//#include <stddef.h> -// -///* These variables are publicly accessible for debugging purposes. -// The user is also free to set sbrk_size to something different. -// See mem-layout.c. */ -// -//extern int sbrk_size asm ("sbrk_size"); -// -//caddr_t sbrk_start asm ("sbrk_start"); -//caddr_t sbrk_loc asm ("sbrk_loc"); -//extern char end; /* Defined by linker. */ -// -///*caddr_t _sbrk_r (struct _reent *, size_t) asm ("__sbrk_r");*/ -// -// -///* This symbol can be defined with the --defsym linker option. */ -//extern char __heap_end __attribute__((weak)); -// -// -///* FIXME: We need a semaphore here. */ -// -//caddr_t -//_sbrk_r (struct _reent *r, size_t nbytes) -//{ -// extern char end; /* Defined by linker. */ -// static char *heap_end; /* Previous end of heap or 0 if none */ -// char *prev_heap_end; -// register char* stack asm("sp"); -// -// if (0 == heap_end) -// { -// heap_end = &end; /* Initialize first time round */ -// } -// -// prev_heap_end = heap_end; -// -// if (stack < (prev_heap_end+nbytes)) { -// /* heap would overlap the current stack depth. -// * Future: use sbrk() system call to make simulator grow memory beyond -// * the stack and allocate that -// */ -// errno = ENOMEM; -// return (char*)-1; -// } -// -// heap_end += nbytes; -// -// return (caddr_t) prev_heap_end; -// -//} /* _sbrk () */ - - -//caddr_t -//_sbrk_r (struct _reent *r, size_t nbytes) -//{ -// caddr_t result; -// -// void *heap_end; -// -// heap_end = &__heap_end; -// if (!heap_end) -// heap_end = sbrk_start + sbrk_size; -// if ( -// /* Ensure we don't underflow. */ -// sbrk_loc + nbytes < sbrk_start -// /* Ensure we don't overflow. */ -// || sbrk_loc + nbytes > (caddr_t)heap_end) -// { -// errno = ENOMEM; -// return ((caddr_t) -1); -// } -// -// if (0 == sbrk_loc) -// sbrk_loc = &end; /* Initialize first time round */ -// result = sbrk_loc; -// sbrk_loc += nbytes; -// return result; -//} |