| // Copyright 2022 Google LLC |
| // |
| // 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. |
| |
| #include <stdlib.h> |
| #include <errno.h> |
| #include <sys/stat.h> |
| #include <unistd.h> |
| #include <stdint.h> |
| |
| #include <springbok_intrinsics.h> |
| |
| void *__dso_handle = reinterpret_cast<void *>(&__dso_handle); |
| |
| char *_heap_ptr; // Set to _sheap in crt0.S |
| |
| extern "C" void *_sbrk(int nbytes) { |
| extern char _sheap, _eheap; |
| |
| if ((nbytes < 0) || |
| (_heap_ptr + nbytes > &_eheap)) { |
| springbok_simprint( |
| SPRINGBOK_SIMPRINT_ERROR, |
| "_sbrk failed to allocate memory. Number of bytes requested:", nbytes); |
| springbok_simprint(SPRINGBOK_SIMPRINT_ERROR, |
| "Number of unallocated bytes remaining:", |
| static_cast<int32_t>(&_eheap - _heap_ptr)); |
| errno = ENOMEM; |
| return reinterpret_cast<void *>(-1); |
| } |
| |
| void *base = _heap_ptr; |
| _heap_ptr += nbytes; |
| return base; |
| } |
| |
| extern "C" int _read(int file, char *ptr, int len) { |
| if (file != STDIN_FILENO) { |
| errno = EBADF; |
| return -1; |
| } |
| |
| return 0; |
| } |
| |
| extern "C" int _write(int file, char *buf, int nbytes) { |
| static int _write_line_buffer_len[2] = {0, 0}; |
| static char _write_line_buffer[2][256]; |
| |
| if (file != STDOUT_FILENO && file != STDERR_FILENO) { |
| errno = EBADF; |
| return -1; |
| } |
| |
| if (nbytes <= 0) { |
| return 0; |
| } |
| |
| if (buf == NULL) { |
| errno = EFAULT; |
| return -1; |
| } |
| |
| const int buffer_num = (file == STDOUT_FILENO)? 0 : 1; |
| const int buffer_level = (file == STDOUT_FILENO) ? SPRINGBOK_SIMPRINT_INFO |
| : SPRINGBOK_SIMPRINT_ERROR; |
| |
| int bytes_read = 0; |
| char c; |
| do { |
| int len = _write_line_buffer_len[buffer_num]; |
| c = *(buf++); |
| bytes_read++; |
| |
| if ((c == '\n') || (c == '\0')) { |
| _write_line_buffer[buffer_num][len] = '\0'; |
| springbok_simprint(buffer_level, _write_line_buffer[buffer_num], |
| buffer_num); |
| len = 0; |
| } else { |
| _write_line_buffer[buffer_num][len] = c; |
| len++; |
| |
| if (len == 255) { |
| _write_line_buffer[buffer_num][len] = '\0'; |
| springbok_simprint(buffer_level, _write_line_buffer[buffer_num], |
| buffer_num); |
| len = 0; |
| } |
| } |
| |
| _write_line_buffer_len[buffer_num] = len; |
| } while (bytes_read < nbytes); |
| |
| return bytes_read; |
| } |
| |
| extern "C" int _close(int file) { |
| errno = EBADF; |
| return -1; |
| } |
| |
| extern "C" int _lseek(int file, int offset, int whence) { |
| if (file != STDOUT_FILENO && file != STDERR_FILENO) { |
| errno = EBADF; |
| return -1; |
| } |
| |
| return 0; |
| } |
| |
| extern "C" int _fstat(int file, struct stat *st) { |
| if (file != STDOUT_FILENO && file != STDERR_FILENO) { |
| errno = EBADF; |
| return -1; |
| } |
| |
| if (st == NULL) { |
| errno = EFAULT; |
| return -1; |
| } |
| |
| st->st_mode = S_IFCHR; |
| return 0; |
| } |
| |
| extern "C" int _isatty(int file) { |
| if (file != STDOUT_FILENO && file != STDERR_FILENO) { |
| errno = EBADF; |
| return -1; |
| } |
| |
| return 1; |
| } |
| |
| void operator delete(void *p) noexcept { |
| free(p); |
| } |
| |
| extern "C" void operator delete(void *p, uint32_t c) noexcept { |
| operator delete(p); |
| } |