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2024-05-10 37f49e37ab4cb5d0bc4c60eb5c6d4dd57db767bb

 kernel/arch/xtensa/include/asm/syscall.h
..
..
@@ -1,27 +1,87 @@
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 /*
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- * include/asm-xtensa/syscall.h
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- *
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  * This file is subject to the terms and conditions of the GNU General Public
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  * License.  See the file "COPYING" in the main directory of this archive
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  * for more details.
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  *
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  * Copyright (C) 2001 - 2007 Tensilica Inc.
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+ * Copyright (C) 2018 Cadence Design Systems Inc.
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  */
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9
 
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-struct pt_regs;
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-asmlinkage long xtensa_ptrace(long, long, long, long);
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-asmlinkage long xtensa_sigreturn(struct pt_regs*);
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-asmlinkage long xtensa_rt_sigreturn(struct pt_regs*);
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+#ifndef _ASM_SYSCALL_H
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+#define _ASM_SYSCALL_H
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+
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+#include <linux/err.h>
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+#include <asm/ptrace.h>
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+#include <uapi/linux/audit.h>
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+
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+static inline int syscall_get_arch(struct task_struct *task)
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+{
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+	return AUDIT_ARCH_XTENSA;
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+}
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+
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+typedef void (*syscall_t)(void);
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+extern syscall_t sys_call_table[];
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+
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+static inline long syscall_get_nr(struct task_struct *task,
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+				  struct pt_regs *regs)
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+{
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+	return regs->syscall;
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+}
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+
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+static inline void syscall_rollback(struct task_struct *task,
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+				    struct pt_regs *regs)
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+{
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+	/* Do nothing. */
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+}
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+
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+static inline long syscall_get_error(struct task_struct *task,
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+				     struct pt_regs *regs)
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+{
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+	/* 0 if syscall succeeded, otherwise -Errorcode */
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+	return IS_ERR_VALUE(regs->areg[2]) ? regs->areg[2] : 0;
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+}
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+
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+static inline long syscall_get_return_value(struct task_struct *task,
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+					    struct pt_regs *regs)
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+{
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+	return regs->areg[2];
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+}
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+
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+static inline void syscall_set_return_value(struct task_struct *task,
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+					    struct pt_regs *regs,
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+					    int error, long val)
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+{
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+	regs->areg[2] = (long) error ? error : val;
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+}
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+
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+#define SYSCALL_MAX_ARGS 6
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+#define XTENSA_SYSCALL_ARGUMENT_REGS {6, 3, 4, 5, 8, 9}
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+
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+static inline void syscall_get_arguments(struct task_struct *task,
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+					 struct pt_regs *regs,
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+					 unsigned long *args)
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+{
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+	static const unsigned int reg[] = XTENSA_SYSCALL_ARGUMENT_REGS;
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+	unsigned int i;
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+
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+	for (i = 0; i < 6; ++i)
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+		args[i] = regs->areg[reg[i]];
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+}
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+
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+static inline void syscall_set_arguments(struct task_struct *task,
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+					 struct pt_regs *regs,
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+					 const unsigned long *args)
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+{
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+	static const unsigned int reg[] = XTENSA_SYSCALL_ARGUMENT_REGS;
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+	unsigned int i;
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+
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+	for (i = 0; i < 6; ++i)
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+		regs->areg[reg[i]] = args[i];
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+}
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+
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+asmlinkage long xtensa_rt_sigreturn(void);
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 asmlinkage long xtensa_shmat(int, char __user *, int);
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 asmlinkage long xtensa_fadvise64_64(int, int,
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 				    unsigned long long, unsigned long long);
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86
 
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-/* Should probably move to linux/syscalls.h */
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-struct pollfd;
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-asmlinkage long sys_pselect6(int n, fd_set __user *inp, fd_set __user *outp,
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-			     fd_set __user *exp, struct timespec __user *tsp,
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-			     void __user *sig);
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-asmlinkage long sys_ppoll(struct pollfd __user *ufds, unsigned int nfds,
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-			  struct timespec __user *tsp,
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-			  const sigset_t __user *sigmask,
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-			  size_t sigsetsize);
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+#endif