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git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@15372 27425a3e-05d8-49a3-a47f-9c15f0e5edd8

This commit is contained in:
Giovanni Di Sirio 2022-01-17 20:01:13 +00:00
parent 8312fe5a73
commit 6c7fea3775
2 changed files with 27 additions and 7 deletions
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15
os/sb/user/lib/syscalls.c
View File

@ -1,5 +1,5 @@
/*
ChibiOS - Copyright (C) 2006..2018 Giovanni Di Sirio
ChibiOS - Copyright (C) 2006..2022 Giovanni Di Sirio
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
@ -25,6 +25,9 @@
#include "errcodes.h"
#include "sbuser.h"
#include "syscalls.h"
uint8_t *__sbrk_next = &__heap_base__;
__attribute__((used))
int _open_r(struct _reent *r, const char *p, int oflag, int mode) {
@ -127,19 +130,17 @@ int _isatty_r(struct _reent *r, int fd) {
__attribute__((used))
caddr_t _sbrk_r(struct _reent *r, int incr) {
extern uint8_t __heap_base__;
uint8_t *p = &__heap_base__;
uint8_t *prevp;
prevp = p;
if ((p + incr > __sb_parameters.heap_end) ||
(p + incr < &__heap_base__)) {
prevp = __sbrk_next;
if ((prevp + incr > __sb_parameters.heap_end) ||
(prevp + incr < &__heap_base__)) {
__errno_r(r) = ENOMEM;
return (caddr_t)-1;
}
(void)r;
p += incr;
__sbrk_next += incr;
return (caddr_t)prevp;
}

19
os/sb/user/lib/syscalls.h Normal file
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@ -0,0 +1,19 @@
/*
ChibiOS - Copyright (C) 2006..2022 Giovanni Di Sirio
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
extern uint8_t __heap_base__;
extern uint8_t *__sbrk_next;