syscalls: clockget

kernel-src/arch/x86-64/syscall.asm

@@ -27,6 +27,7 @@ extern syscall_faccessat
 extern syscall_unlinkat
 extern syscall_ioctl
 extern syscall_mkdirat
+extern syscall_clockget
 syscalltab:
 dq syscall_print
 dq syscall_mmap
@@ -56,7 +57,8 @@ dq syscall_faccessat
 dq syscall_unlinkat
 dq syscall_ioctl
 dq syscall_mkdirat
-syscallcount equ 28
+dq syscall_clockget
+syscallcount equ 29
 section .text
 global arch_syscall_entry
 ; on entry:

kernel-src/arch/x86-64/syscalllog.c

@@ -4,7 +4,7 @@
 
 #ifdef SYSCALL_LOGGING
 
-#define SYSCALL_COUNT 28
+#define SYSCALL_COUNT 29
 #define LOGSTR(x) arch_e9_puts(x)
 
 static char *name[] = {
@@ -35,7 +35,8 @@ static char *name[] = {
 	"faccessat",
 	"unlinkat",
 	"ioctl",
-	"mkdirat"
+	"mkdirat",
+	"clockget"
 };
 
 static char *args[] = {
@@ -66,7 +67,8 @@ static char *args[] = {
 	"dirfd %d pathname %s mode %d flags %d", // faccessat
 	"dirfd %d pathname %d flags %d", // unlinkat
 	"fd %d request %lu argument %d", // ioctl
-	"dirfd %d path %s mode %o" // mkdirat
+	"dirfd %d path %s mode %o", // mkdirat
+	"clockid %d timespec %p" // clockget
 };
 
 #endif

kernel-src/sys/syscalls/clockget.c

@@ -0,0 +1,40 @@
+#include <kernel/syscalls.h>
+#include <kernel/abi.h>
+#include <time.h>
+#include <kernel/timekeeper.h>
+#include <kernel/vmm.h>
+
+#define CLOCK_REALTIME 0
+#define CLOCK_BOOTTIME 7
+
+syscallret_t syscall_clockget(context_t *, int clockid, timespec_t *tp){
+	syscallret_t ret = {
+		.ret = -1
+	};
+
+	if ((void *)tp > USERSPACE_END) {
+		ret.errno = EFAULT;
+		return ret;
+	}
+
+	switch (clockid) {
+		case CLOCK_REALTIME:
+			// TODO safe memcpy
+			*tp = timekeeper_time();
+			ret.errno = 0;
+			break;
+		case CLOCK_BOOTTIME:
+			// TODO safe memcpy
+			*tp = timekeeper_timefromboot();
+			ret.errno = 0;
+			break;
+		default:
+			ret.errno = EINVAL;
+			break;
+	}
+
+	ret.ret = ret.errno ? -1 : 0;
+
+	return ret;
+
+}