d47cccc157
+ Microarchitecture optimizations + 64-bit support + Xilinx FPGA support + LLVM-16 support + Refactoring and quality control fixes
125 lines
2.9 KiB
C
125 lines
2.9 KiB
C
// Copyright © 2019-2023
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include <sys/stat.h>
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#include <newlib.h>
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#include <unistd.h>
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#include <vx_intrinsics.h>
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#include <vx_print.h>
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#include <string.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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int _close(int file) { return -1; }
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int _fstat(int file, struct stat *st) { return -1; }
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int _isatty(int file) { return 0; }
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int _lseek(int file, int ptr, int dir) { return 0; }
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int _open(const char *name, int flags, int mode) { return -1; }
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int _read(int file, char *ptr, int len) { return -1; }
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caddr_t _sbrk(int incr) {
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__asm__ __volatile__("ebreak");
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return 0;
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}
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int _write(int file, char *ptr, int len) {
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int i;
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for (i = 0; i < len; ++i) {
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vx_putchar(*ptr++);
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}
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return len;
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}
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int _kill(int pid, int sig) { return -1; }
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int _getpid() {
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return vx_hart_id();
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}
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void __init_tls(void) {
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extern char __tdata_start[];
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extern char __tbss_offset[];
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extern char __tdata_size[];
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extern char __tbss_size[];
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// TLS memory initialization
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register char *__thread_self __asm__ ("tp");
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memcpy(__thread_self, __tdata_start, (size_t)__tdata_size);
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memset(__thread_self + (size_t)__tbss_offset, 0, (size_t)__tbss_size);
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}
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#ifdef HAVE_INITFINI_ARRAY
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/* These magic symbols are provided by the linker. */
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extern void (*__preinit_array_start []) (void) __attribute__((weak));
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extern void (*__preinit_array_end []) (void) __attribute__((weak));
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extern void (*__init_array_start []) (void) __attribute__((weak));
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extern void (*__init_array_end []) (void) __attribute__((weak));
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#ifdef HAVE_INIT_FINI
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extern void _init (void);
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#endif
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/* Iterate over all the init routines. */
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void __libc_init_array (void) {
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size_t count;
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size_t i;
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count = __preinit_array_end - __preinit_array_start;
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for (i = 0; i < count; i++)
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__preinit_array_start[i] ();
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#ifdef HAVE_INIT_FINI
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_init ();
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#endif
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count = __init_array_end - __init_array_start;
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for (i = 0; i < count; i++)
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__init_array_start[i] ();
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}
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#endif
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#ifdef HAVE_INITFINI_ARRAY
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extern void (*__fini_array_start []) (void) __attribute__((weak));
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extern void (*__fini_array_end []) (void) __attribute__((weak));
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#ifdef HAVE_INIT_FINI
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extern void _fini (void);
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#endif
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/* Run all the cleanup routines. */
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void __libc_fini_array (void) {
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size_t count;
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size_t i;
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count = __fini_array_end - __fini_array_start;
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for (i = count; i > 0; i--)
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__fini_array_start[i-1] ();
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#ifdef HAVE_INIT_FINI
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_fini ();
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#endif
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}
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#endif
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#ifdef __cplusplus
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}
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#endif
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