47 lines
1.1 KiB
C
47 lines
1.1 KiB
C
#include <errno.h>
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#include <sys/stat.h>
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extern char _end; /* provided by linker script */
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static char *heap_ptr = &_end;
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// Required for Newlib's malloc/calloc/realloc.
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// Although AOT/Interp use wasm_runtime_malloc instead,
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// it's still necessary for snprintf/vsnprintf.
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void *sbrk(int incr) {
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char *prev = heap_ptr;
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heap_ptr += incr;
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return prev;
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}
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// Required to exist for AOT/Interp, but don't need to be implemented.
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// We don't have files/consoles/serial ports/whatever.
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int read(int fd, char *buf, int len) { return 0; }
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int write(int fd, const char *buf, int len) { return len; }
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int close(int fd) { return -1; }
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int fstat(int fd, struct stat *st) {
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st->st_mode = S_IFCHR;
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return 0;
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}
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int isatty(int fd) { return 1; }
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// Required to exist for C/AOT/Interp
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int lseek(int fd, int offset, int whence) { return 0; }
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// Required to exist for AOT/Interp.
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// We don't have processes, so those can be stubs.
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void _exit(int status) {
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while (1)
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;
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}
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int kill(int pid, int sig) {
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errno = EINVAL;
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return -1;
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}
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int getpid(void) { return 1; }
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// Not required? Why do I have this?
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// void exit(int status) {
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// while (1)
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// ;
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// }
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