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2024-05-10 23fa18eaa71266feff7ba8d83022d9e1cc83c65a 
 kernel/arch/nds32/include/asm/syscall.h
....@@ -1,10 +1,11 @@
1
-// SPDX-License-Identifier: GPL-2.0
1
+/* SPDX-License-Identifier: GPL-2.0 */
22 // Copyright (C) 2008-2009 Red Hat, Inc.  All rights reserved.
33 // Copyright (C) 2005-2017 Andes Technology Corporation
44 
55 #ifndef _ASM_NDS32_SYSCALL_H
66 #define _ASM_NDS32_SYSCALL_H	1
77 
8
+#include <uapi/linux/audit.h>
89 #include <linux/err.h>
910 struct task_struct;
1011 struct pt_regs;
....@@ -25,7 +26,8 @@
2526  *
2627  * It's only valid to call this when @task is known to be blocked.
2728  */
28
-int syscall_get_nr(struct task_struct *task, struct pt_regs *regs)
29
+static inline int
30
+syscall_get_nr(struct task_struct *task, struct pt_regs *regs)
2931 {
3032 	return regs->syscallno;
3133 }
....@@ -46,7 +48,8 @@
4648  * system call instruction.  This may not be the same as what the
4749  * register state looked like at system call entry tracing.
4850  */
49
-void syscall_rollback(struct task_struct *task, struct pt_regs *regs)
51
+static inline void
52
+syscall_rollback(struct task_struct *task, struct pt_regs *regs)
5053 {
5154 	regs->uregs[0] = regs->orig_r0;
5255 }
....@@ -61,7 +64,8 @@
6164  * It's only valid to call this when @task is stopped for tracing on exit
6265  * from a system call, due to %TIF_SYSCALL_TRACE or %TIF_SYSCALL_AUDIT.
6366  */
64
-long syscall_get_error(struct task_struct *task, struct pt_regs *regs)
67
+static inline long
68
+syscall_get_error(struct task_struct *task, struct pt_regs *regs)
6569 {
6670 	unsigned long error = regs->uregs[0];
6771 	return IS_ERR_VALUE(error) ? error : 0;
....@@ -78,7 +82,8 @@
7882  * It's only valid to call this when @task is stopped for tracing on exit
7983  * from a system call, due to %TIF_SYSCALL_TRACE or %TIF_SYSCALL_AUDIT.
8084  */
81
-long syscall_get_return_value(struct task_struct *task, struct pt_regs *regs)
85
+static inline long
86
+syscall_get_return_value(struct task_struct *task, struct pt_regs *regs)
8287 {
8388 	return regs->uregs[0];
8489 }
....@@ -98,8 +103,9 @@
98103  * It's only valid to call this when @task is stopped for tracing on exit
99104  * from a system call, due to %TIF_SYSCALL_TRACE or %TIF_SYSCALL_AUDIT.
100105  */
101
-void syscall_set_return_value(struct task_struct *task, struct pt_regs *regs,
102
-			      int error, long val)
106
+static inline void
107
+syscall_set_return_value(struct task_struct *task, struct pt_regs *regs,
108
+			 int error, long val)
103109 {
104110 	regs->uregs[0] = (long)error ? error : val;
105111 }
....@@ -108,81 +114,51 @@
108114  * syscall_get_arguments - extract system call parameter values
109115  * @task:	task of interest, must be blocked
110116  * @regs:	task_pt_regs() of @task
111
- * @i:		argument index [0,5]
112
- * @n:		number of arguments; n+i must be [1,6].
113117  * @args:	array filled with argument values
114118  *
115
- * Fetches @n arguments to the system call starting with the @i'th argument
116
- * (from 0 through 5).  Argument @i is stored in @args[0], and so on.
117
- * An arch inline version is probably optimal when @i and @n are constants.
119
+ * Fetches 6 arguments to the system call (from 0 through 5). The first
120
+ * argument is stored in @args[0], and so on.
118121  *
119122  * It's only valid to call this when @task is stopped for tracing on
120123  * entry to a system call, due to %TIF_SYSCALL_TRACE or %TIF_SYSCALL_AUDIT.
121
- * It's invalid to call this with @i + @n > 6; we only support system calls
122
- * taking up to 6 arguments.
123124  */
124125 #define SYSCALL_MAX_ARGS 6
125
-void syscall_get_arguments(struct task_struct *task, struct pt_regs *regs,
126
-			   unsigned int i, unsigned int n, unsigned long *args)
126
+static inline void
127
+syscall_get_arguments(struct task_struct *task, struct pt_regs *regs,
128
+		      unsigned long *args)
127129 {
128
-	if (n == 0)
129
-		return;
130
-	if (i + n > SYSCALL_MAX_ARGS) {
131
-		unsigned long *args_bad = args + SYSCALL_MAX_ARGS - i;
132
-		unsigned int n_bad = n + i - SYSCALL_MAX_ARGS;
133
-		pr_warning("%s called with max args %d, handling only %d\n",
134
-			   __func__, i + n, SYSCALL_MAX_ARGS);
135
-		memset(args_bad, 0, n_bad * sizeof(args[0]));
136
-		memset(args_bad, 0, n_bad * sizeof(args[0]));
137
-	}
138
-
139
-	if (i == 0) {
140
-		args[0] = regs->orig_r0;
141
-		args++;
142
-		i++;
143
-		n--;
144
-	}
145
-
146
-	memcpy(args, &regs->uregs[0] + i, n * sizeof(args[0]));
130
+	args[0] = regs->orig_r0;
131
+	args++;
132
+	memcpy(args, &regs->uregs[0] + 1, 5 * sizeof(args[0]));
147133 }
148134 
149135 /**
150136  * syscall_set_arguments - change system call parameter value
151137  * @task:	task of interest, must be in system call entry tracing
152138  * @regs:	task_pt_regs() of @task
153
- * @i:		argument index [0,5]
154
- * @n:		number of arguments; n+i must be [1,6].
155139  * @args:	array of argument values to store
156140  *
157
- * Changes @n arguments to the system call starting with the @i'th argument.
158
- * Argument @i gets value @args[0], and so on.
159
- * An arch inline version is probably optimal when @i and @n are constants.
141
+ * Changes 6 arguments to the system call. The first argument gets value
142
+ * @args[0], and so on.
160143  *
161144  * It's only valid to call this when @task is stopped for tracing on
162145  * entry to a system call, due to %TIF_SYSCALL_TRACE or %TIF_SYSCALL_AUDIT.
163
- * It's invalid to call this with @i + @n > 6; we only support system calls
164
- * taking up to 6 arguments.
165146  */
166
-void syscall_set_arguments(struct task_struct *task, struct pt_regs *regs,
167
-			   unsigned int i, unsigned int n,
168
-			   const unsigned long *args)
147
+static inline void
148
+syscall_set_arguments(struct task_struct *task, struct pt_regs *regs,
149
+		      const unsigned long *args)
169150 {
170
-	if (n == 0)
171
-		return;
151
+	regs->orig_r0 = args[0];
152
+	args++;
172153 
173
-	if (i + n > SYSCALL_MAX_ARGS) {
174
-		pr_warn("%s called with max args %d, handling only %d\n",
175
-			__func__, i + n, SYSCALL_MAX_ARGS);
176
-		n = SYSCALL_MAX_ARGS - i;
177
-	}
178
-
179
-	if (i == 0) {
180
-		regs->orig_r0 = args[0];
181
-		args++;
182
-		i++;
183
-		n--;
184
-	}
185
-
186
-	memcpy(&regs->uregs[0] + i, args, n * sizeof(args[0]));
154
+	memcpy(&regs->uregs[0] + 1, args, 5 * sizeof(args[0]));
187155 }
156
+
157
+static inline int
158
+syscall_get_arch(struct task_struct *task)
159
+{
160
+	return IS_ENABLED(CONFIG_CPU_BIG_ENDIAN)
161
+		? AUDIT_ARCH_NDS32BE : AUDIT_ARCH_NDS32;
162
+}
163
+
188164 #endif /* _ASM_NDS32_SYSCALL_H */