meta: move photon/libc to root

libc/sys/linux/syscall.c

@@ -0,0 +1,164 @@
+#include "poll.h"
+#include "sys/syscall.h"
+#include "__syscall.h"
+#include "unistd.h"
+
+extern void *__curr_brk;
+
+ssize_t read(int fd, void *buf, size_t count)
+{
+    intptr_t res = __syscall3(SYS_read, (uintptr_t)fd, (uintptr_t)buf,
+            (uintptr_t)count);
+    if (res < 0) {
+        return -1;
+    }
+
+    return (ssize_t)res;
+}
+
+ssize_t write(int fd, const void *buf, size_t count)
+{
+    intptr_t res = __syscall3(SYS_write, (uintptr_t)fd, (uintptr_t)buf,
+            (uintptr_t)count);
+    if (res < 0) {
+        return -1;
+    }
+
+    return (ssize_t)res;
+}
+
+int open(const char *pathname, int flags)
+{
+    intptr_t res = __syscall3(SYS_open, (uintptr_t)pathname,
+            (uintptr_t)flags, 0);
+    if (res < 0) {
+        return -1;
+    }
+
+    return (int)res;
+}
+
+int close(int fd)
+{
+    intptr_t res = __syscall1(SYS_close, (uintptr_t)fd);
+    if (res < 0) {
+        return -1;
+    }
+
+    return (int)res;
+}
+
+int stat(const char *pathname, struct stat *statbuf)
+{
+    intptr_t res = __syscall2(SYS_stat, (uintptr_t)pathname,
+            (uintptr_t)statbuf);
+    if (res < 0) {
+        return -1;
+    }
+
+    return (int)res;
+}
+
+int fstat(int fd, struct stat *statbuf)
+{
+    intptr_t res = __syscall2(SYS_fstat, (uintptr_t)fd,
+            (uintptr_t)statbuf);
+    if (res < 0) {
+        return -1;
+    }
+
+    return (int)res;
+}
+
+int lstat(const char *pathname, struct stat *statbuf)
+{
+    intptr_t res = __syscall2(SYS_lstat, (uintptr_t)pathname,
+            (uintptr_t)statbuf);
+    if (res < 0) {
+        return -1;
+    }
+
+    return (int)res;
+}
+
+int poll(struct pollfd *fds, nfds_t nfds, int timeout)
+{
+    intptr_t res = __syscall3(SYS_poll, (uintptr_t)fds,
+            (uintptr_t)nfds, (uintptr_t)timeout);
+    if (res < 0) {
+        return -1;
+    }
+
+    return (int)res;
+}
+
+off_t lseek(int fd, off_t offset, int whence)
+{
+    intptr_t res = __syscall3(SYS_lseek, (uintptr_t)fd,
+            (uintptr_t)offset, (uintptr_t)whence);
+    if (res < 0) {
+        return -1;
+    }
+
+    return (int)res;
+}
+
+void *mmap(void *addr, size_t len, int prot, int flags, int fd, off_t off)
+{
+    intptr_t res = __syscall6(SYS_mmap, (uintptr_t)addr, (uintptr_t)len,
+            (uintptr_t)prot, (uintptr_t)flags, (uintptr_t)fd, (uintptr_t)off);
+    if (res < 0) {
+        return NULL;
+    }
+
+    return (void *)res;
+}
+
+int mprotect(void *addr, size_t len, int prot)
+{
+    intptr_t res = __syscall3(SYS_mprotect, (uintptr_t)addr, (uintptr_t)len,
+            (uintptr_t)prot);
+    if (res < 0) {
+        return -1;
+    }
+
+    return (int)res;
+}
+
+int munmap(void *addr, size_t length)
+{
+    intptr_t res = __syscall2(SYS_munmap, (uintptr_t)addr, (uintptr_t)length);
+    if (res < 0) {
+        return -1;
+    }
+
+    return (int)res;
+}
+
+int brk(void *addr)
+{
+    intptr_t res = __syscall1(SYS_brk, (uintptr_t)addr);
+    if (res < 0) {
+        return -1;
+    }
+
+    __curr_brk = (void *)res;
+
+    return (int)res;
+}
+
+int ioctl(int fd, unsigned long req, void *arg)
+{
+    intptr_t res = __syscall3(SYS_ioctl, (uintptr_t)fd, (uintptr_t)req,
+            (uintptr_t)arg);
+    if (res < 0) {
+        return -1;
+    }
+
+    return (int)res;
+}
+
+void _exit(int code)
+{
+    __syscall1(SYS__exit, code);
+}