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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 10:05:51 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 10:05:51 +0000
commit5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch)
treea94efe259b9009378be6d90eb30d2b019d95c194 /arch/arm64/kernel/sys.c
parentInitial commit. (diff)
downloadlinux-5d1646d90e1f2cceb9f0828f4b28318cd0ec7744.tar.xz
linux-5d1646d90e1f2cceb9f0828f4b28318cd0ec7744.zip
Adding upstream version 5.10.209.upstream/5.10.209
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/arm64/kernel/sys.c')
-rw-r--r--arch/arm64/kernel/sys.c61
1 files changed, 61 insertions, 0 deletions
diff --git a/arch/arm64/kernel/sys.c b/arch/arm64/kernel/sys.c
new file mode 100644
index 000000000..d5ffaaab3
--- /dev/null
+++ b/arch/arm64/kernel/sys.c
@@ -0,0 +1,61 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * AArch64-specific system calls implementation
+ *
+ * Copyright (C) 2012 ARM Ltd.
+ * Author: Catalin Marinas <catalin.marinas@arm.com>
+ */
+
+#include <linux/compiler.h>
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/mm.h>
+#include <linux/export.h>
+#include <linux/sched.h>
+#include <linux/slab.h>
+#include <linux/syscalls.h>
+
+#include <asm/cpufeature.h>
+#include <asm/syscall.h>
+
+SYSCALL_DEFINE6(mmap, unsigned long, addr, unsigned long, len,
+ unsigned long, prot, unsigned long, flags,
+ unsigned long, fd, unsigned long, off)
+{
+ if (offset_in_page(off) != 0)
+ return -EINVAL;
+
+ return ksys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT);
+}
+
+SYSCALL_DEFINE1(arm64_personality, unsigned int, personality)
+{
+ if (personality(personality) == PER_LINUX32 &&
+ !system_supports_32bit_el0())
+ return -EINVAL;
+ return ksys_personality(personality);
+}
+
+asmlinkage long sys_ni_syscall(void);
+
+asmlinkage long __arm64_sys_ni_syscall(const struct pt_regs *__unused)
+{
+ return sys_ni_syscall();
+}
+
+/*
+ * Wrappers to pass the pt_regs argument.
+ */
+#define __arm64_sys_personality __arm64_sys_arm64_personality
+
+#undef __SYSCALL
+#define __SYSCALL(nr, sym) asmlinkage long __arm64_##sym(const struct pt_regs *);
+#include <asm/unistd.h>
+
+#undef __SYSCALL
+#define __SYSCALL(nr, sym) [nr] = __arm64_##sym,
+
+const syscall_fn_t sys_call_table[__NR_syscalls] = {
+ [0 ... __NR_syscalls - 1] = __arm64_sys_ni_syscall,
+#include <asm/unistd.h>
+};