syscalls: getcpu

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

@@ -94,6 +94,7 @@ extern syscall_killthread
 extern syscall_shutdown
 extern syscall_nice
 extern syscall_flock
+extern syscall_getcpu
 syscalltab:
 dq syscall_print
 dq syscall_mmap
@@ -190,7 +191,8 @@ dq syscall_killthread
 dq syscall_shutdown
 dq syscall_nice
 dq syscall_flock
-syscallcount equ 95
+dq syscall_getcpu
+syscallcount equ 96
 section .text
 global arch_syscall_entry
 ; on entry:

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

@@ -5,7 +5,7 @@
 
 #ifdef SYSCALL_LOGGING
 
-#define SYSCALL_COUNT 95
+#define SYSCALL_COUNT 96
 #define LOGSTR(x) arch_e9_puts(x)
 
 static char *name[] = {
@@ -103,7 +103,8 @@ static char *name[] = {
 	"killthread",
 	"shutdown",
 	"nice",
-	"flock"
+	"flock",
+	"getcpu"
 };
 
 static char *args[] = {
@@ -201,7 +202,8 @@ static char *args[] = {
 	"pid %d tid %d signal %d", // killthread
 	"how %d", // shutdown
 	"off %d", // nice
-	"fd %d op %d" // flock
+	"fd %d op %d", // flock
+	"N/A" // getcpu
 };
 
 #endif

kernel-src/sys/syscalls/getcpu.c

@@ -0,0 +1,14 @@
+#include <kernel/syscalls.h>
+#include <arch/cpu.h>
+
+syscallret_t syscall_getcpu(context_t *) {
+	syscallret_t ret = {
+		.errno = 0
+	};
+
+
+	uint32_t cpu_id = current_cpu_internal_id();
+
+	ret.ret = cpu_id;
+	return ret;
+}