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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /arch/arm/include/asm/syscall.h
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/arm/include/asm/syscall.h')
-rw-r--r--arch/arm/include/asm/syscall.h89
1 files changed, 89 insertions, 0 deletions
diff --git a/arch/arm/include/asm/syscall.h b/arch/arm/include/asm/syscall.h
new file mode 100644
index 0000000000..fe4326d938
--- /dev/null
+++ b/arch/arm/include/asm/syscall.h
@@ -0,0 +1,89 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Access to user system call parameters and results
+ *
+ * See asm-generic/syscall.h for descriptions of what we must do here.
+ */
+
+#ifndef _ASM_ARM_SYSCALL_H
+#define _ASM_ARM_SYSCALL_H
+
+#include <uapi/linux/audit.h> /* for AUDIT_ARCH_* */
+#include <linux/elf.h> /* for ELF_EM */
+#include <linux/err.h>
+#include <linux/sched.h>
+
+#include <asm/unistd.h>
+
+#define NR_syscalls (__NR_syscalls)
+
+extern const unsigned long sys_call_table[];
+
+static inline int syscall_get_nr(struct task_struct *task,
+ struct pt_regs *regs)
+{
+ if (IS_ENABLED(CONFIG_AEABI) && !IS_ENABLED(CONFIG_OABI_COMPAT))
+ return task_thread_info(task)->abi_syscall;
+
+ if (task_thread_info(task)->abi_syscall == -1)
+ return -1;
+
+ return task_thread_info(task)->abi_syscall & __NR_SYSCALL_MASK;
+}
+
+static inline bool __in_oabi_syscall(struct task_struct *task)
+{
+ return IS_ENABLED(CONFIG_OABI_COMPAT) &&
+ (task_thread_info(task)->abi_syscall & __NR_OABI_SYSCALL_BASE);
+}
+
+static inline bool in_oabi_syscall(void)
+{
+ return __in_oabi_syscall(current);
+}
+
+static inline void syscall_rollback(struct task_struct *task,
+ struct pt_regs *regs)
+{
+ regs->ARM_r0 = regs->ARM_ORIG_r0;
+}
+
+static inline long syscall_get_error(struct task_struct *task,
+ struct pt_regs *regs)
+{
+ unsigned long error = regs->ARM_r0;
+ return IS_ERR_VALUE(error) ? error : 0;
+}
+
+static inline long syscall_get_return_value(struct task_struct *task,
+ struct pt_regs *regs)
+{
+ return regs->ARM_r0;
+}
+
+static inline void syscall_set_return_value(struct task_struct *task,
+ struct pt_regs *regs,
+ int error, long val)
+{
+ regs->ARM_r0 = (long) error ? error : val;
+}
+
+#define SYSCALL_MAX_ARGS 7
+
+static inline void syscall_get_arguments(struct task_struct *task,
+ struct pt_regs *regs,
+ unsigned long *args)
+{
+ args[0] = regs->ARM_ORIG_r0;
+ args++;
+
+ memcpy(args, &regs->ARM_r0 + 1, 5 * sizeof(args[0]));
+}
+
+static inline int syscall_get_arch(struct task_struct *task)
+{
+ /* ARM tasks don't change audit architectures on the fly. */
+ return AUDIT_ARCH_ARM;
+}
+
+#endif /* _ASM_ARM_SYSCALL_H */