syscalls: Remove start and number from syscall_set_arguments() args

After removing the start and count arguments of syscall_get_arguments() it
seems reasonable to remove them from syscall_set_arguments(). Note, as of
today, there are no users of syscall_set_arguments(). But we are told that
there will be soon. But for now, at least make it consistent with
syscall_get_arguments().

Link: http://lkml.kernel.org/r/20190327222014.GA32540@altlinux.org
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Dominik Brodowski <linux@dominikbrodowski.net>
Cc: Dave Martin <dave.martin@arm.com>
Cc: "Dmitry V. Levin" <ldv@altlinux.org>
Cc: x86@kernel.org
Cc: linux-snps-arc@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-c6x-dev@linux-c6x.org
Cc: uclinux-h8-devel@lists.sourceforge.jp
Cc: linux-hexagon@vger.kernel.org
Cc: linux-ia64@vger.kernel.org
Cc: linux-mips@vger.kernel.org
Cc: nios2-dev@lists.rocketboards.org
Cc: openrisc@lists.librecores.org
Cc: linux-parisc@vger.kernel.org
Cc: linuxppc-dev@lists.ozlabs.org
Cc: linux-riscv@lists.infradead.org
Cc: linux-s390@vger.kernel.org
Cc: linux-sh@vger.kernel.org
Cc: sparclinux@vger.kernel.org
Cc: linux-um@lists.infradead.org
Cc: linux-xtensa@linux-xtensa.org
Cc: linux-arch@vger.kernel.org
Acked-by: Max Filippov <jcmvbkbc@gmail.com> # For xtensa changes
Acked-by: Will Deacon <will.deacon@arm.com> # For the arm64 bits
Reviewed-by: Thomas Gleixner <tglx@linutronix.de> # for x86
Reviewed-by: Dmitry V. Levin <ldv@altlinux.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>

diff --git a/arch/arm/include/asm/syscall.h b/arch/arm/include/asm/syscall.h
index db969a2..080ce70 100644 (file)
--- a/arch/arm/include/asm/syscall.h
+++ b/arch/arm/include/asm/syscall.h
@@ -65,26 +65,12 @@ static inline void syscall_get_arguments(struct task_struct *task,
 
 static inline void syscall_set_arguments(struct task_struct *task,
                                         struct pt_regs *regs,
-                                        unsigned int i, unsigned int n,
                                         const unsigned long *args)
 {
-       if (n == 0)
-               return;
-
-       if (i + n > SYSCALL_MAX_ARGS) {
-               pr_warn("%s called with max args %d, handling only %d\n",
-                       __func__, i + n, SYSCALL_MAX_ARGS);
-               n = SYSCALL_MAX_ARGS - i;
-       }
-
-       if (i == 0) {
-               regs->ARM_ORIG_r0 = args[0];
-               args++;
-               i++;
-               n--;
-       }
-
-       memcpy(&regs->ARM_r0 + i, args, n * sizeof(args[0]));
+       regs->ARM_ORIG_r0 = args[0];
+       args++;
+
+       memcpy(&regs->ARM_r0 + 1, args, 5 * sizeof(args[0]));
 }
 
 static inline int syscall_get_arch(void)

diff --git a/arch/arm64/include/asm/syscall.h b/arch/arm64/include/asm/syscall.h
index 55b2dab..a179df3 100644 (file)
--- a/arch/arm64/include/asm/syscall.h
+++ b/arch/arm64/include/asm/syscall.h
@@ -75,26 +75,12 @@ static inline void syscall_get_arguments(struct task_struct *task,
 
 static inline void syscall_set_arguments(struct task_struct *task,
                                         struct pt_regs *regs,
-                                        unsigned int i, unsigned int n,
                                         const unsigned long *args)
 {
-       if (n == 0)
-               return;
-
-       if (i + n > SYSCALL_MAX_ARGS) {
-               pr_warning("%s called with max args %d, handling only %d\n",
-                          __func__, i + n, SYSCALL_MAX_ARGS);
-               n = SYSCALL_MAX_ARGS - i;
-       }
-
-       if (i == 0) {
-               regs->orig_x0 = args[0];
-               args++;
-               i++;
-               n--;
-       }
-
-       memcpy(&regs->regs[i], args, n * sizeof(args[0]));
+       regs->orig_x0 = args[0];
+       args++;
+
+       memcpy(&regs->regs[1], args, 5 * sizeof(args[0]));
 }
 
 /*

diff --git a/arch/c6x/include/asm/syscall.h b/arch/c6x/include/asm/syscall.h
index 06db325..15ba859 100644 (file)
--- a/arch/c6x/include/asm/syscall.h
+++ b/arch/c6x/include/asm/syscall.h
@@ -59,40 +59,14 @@ static inline void syscall_get_arguments(struct task_struct *task,
 
 static inline void syscall_set_arguments(struct task_struct *task,
                                         struct pt_regs *regs,
-                                        unsigned int i, unsigned int n,
                                         const unsigned long *args)
 {
-       switch (i) {
-       case 0:
-               if (!n--)
-                       break;
-               regs->a4 = *args++;
-       case 1:
-               if (!n--)
-                       break;
-               regs->b4 = *args++;
-       case 2:
-               if (!n--)
-                       break;
-               regs->a6 = *args++;
-       case 3:
-               if (!n--)
-                       break;
-               regs->b6 = *args++;
-       case 4:
-               if (!n--)
-                       break;
-               regs->a8 = *args++;
-       case 5:
-               if (!n--)
-                       break;
-               regs->a9 = *args++;
-       case 6:
-               if (!n)
-                       break;
-       default:
-               BUG();
-       }
+       regs->a4 = *args++;
+       regs->b4 = *args++;
+       regs->a6 = *args++;
+       regs->b6 = *args++;
+       regs->a8 = *args++;
+       regs->a9 = *args;
 }
 
 #endif /* __ASM_C6X_SYSCALLS_H */

diff --git a/arch/csky/include/asm/syscall.h b/arch/csky/include/asm/syscall.h
index c691fe9..bda0a44 100644 (file)
--- a/arch/csky/include/asm/syscall.h
+++ b/arch/csky/include/asm/syscall.h
@@ -52,17 +52,11 @@ syscall_get_arguments(struct task_struct *task, struct pt_regs *regs,
 
 static inline void
 syscall_set_arguments(struct task_struct *task, struct pt_regs *regs,
-                     unsigned int i, unsigned int n, const unsigned long *args)
+                     const unsigned long *args)
 {
-       BUG_ON(i + n > 6);
-       if (i == 0) {
-               regs->orig_a0 = args[0];
-               args++;
-               n--;
-       } else {
-               i--;
-       }
-       memcpy(&regs->a1 + i, args, n * sizeof(regs->a1));
+       regs->orig_a0 = args[0];
+       args++;
+       memcpy(&regs->a1, args, 5 * sizeof(regs->a1));
 }
 
 static inline int

diff --git a/arch/ia64/include/asm/syscall.h b/arch/ia64/include/asm/syscall.h
index 8204c1f..0d9e7fa 100644 (file)
--- a/arch/ia64/include/asm/syscall.h
+++ b/arch/ia64/include/asm/syscall.h
@@ -59,23 +59,19 @@ static inline void syscall_set_return_value(struct task_struct *task,
 }
 
 extern void ia64_syscall_get_set_arguments(struct task_struct *task,
-       struct pt_regs *regs, unsigned int i, unsigned int n,
-       unsigned long *args, int rw);
+       struct pt_regs *regs, unsigned long *args, int rw);
 static inline void syscall_get_arguments(struct task_struct *task,
                                         struct pt_regs *regs,
                                         unsigned long *args)
 {
-       ia64_syscall_get_set_arguments(task, regs, 0, 6, args, 0);
+       ia64_syscall_get_set_arguments(task, regs, args, 0);
 }
 
 static inline void syscall_set_arguments(struct task_struct *task,
                                         struct pt_regs *regs,
-                                        unsigned int i, unsigned int n,
                                         unsigned long *args)
 {
-       BUG_ON(i + n > 6);
-
-       ia64_syscall_get_set_arguments(task, regs, i, n, args, 1);
+       ia64_syscall_get_set_arguments(task, regs, args, 1);
 }
 
 static inline int syscall_get_arch(void)

diff --git a/arch/ia64/kernel/ptrace.c b/arch/ia64/kernel/ptrace.c
index 6d50ede..bf9c24d 100644 (file)
--- a/arch/ia64/kernel/ptrace.c
+++ b/arch/ia64/kernel/ptrace.c
@@ -2179,12 +2179,11 @@ static void syscall_get_set_args_cb(struct unw_frame_info *info, void *data)
 }
 
 void ia64_syscall_get_set_arguments(struct task_struct *task,
-       struct pt_regs *regs, unsigned int i, unsigned int n,
-       unsigned long *args, int rw)
+       struct pt_regs *regs, unsigned long *args, int rw)
 {
        struct syscall_get_set_args data = {
-               .i = i,
-               .n = n,
+               .i = 0,
+               .n = 6,
                .args = args,
                .regs = regs,
                .rw = rw,

diff --git a/arch/microblaze/include/asm/syscall.h b/arch/microblaze/include/asm/syscall.h
index 4b23e44..833d3a5 100644 (file)
--- a/arch/microblaze/include/asm/syscall.h
+++ b/arch/microblaze/include/asm/syscall.h
@@ -93,9 +93,11 @@ static inline void syscall_get_arguments(struct task_struct *task,
 
 static inline void syscall_set_arguments(struct task_struct *task,
                                         struct pt_regs *regs,
-                                        unsigned int i, unsigned int n,
                                         const unsigned long *args)
 {
+       unsigned int i = 0;
+       unsigned int n = 6;
+
        while (n--)
                microblaze_set_syscall_arg(regs, i++, *args++);
 }

diff --git a/arch/nds32/include/asm/syscall.h b/arch/nds32/include/asm/syscall.h
index 89a6ec8..671ebd3 100644 (file)
--- a/arch/nds32/include/asm/syscall.h
+++ b/arch/nds32/include/asm/syscall.h
@@ -129,39 +129,20 @@ void syscall_get_arguments(struct task_struct *task, struct pt_regs *regs,
  * syscall_set_arguments - change system call parameter value
  * @task:      task of interest, must be in system call entry tracing
  * @regs:      task_pt_regs() of @task
- * @i:         argument index [0,5]
- * @n:         number of arguments; n+i must be [1,6].
  * @args:      array of argument values to store
  *
- * Changes @n arguments to the system call starting with the @i'th argument.
- * Argument @i gets value @args[0], and so on.
- * An arch inline version is probably optimal when @i and @n are constants.
+ * Changes 6 arguments to the system call. The first argument gets value
+ * @args[0], and so on.
  *
  * It's only valid to call this when @task is stopped for tracing on
  * entry to a system call, due to %TIF_SYSCALL_TRACE or %TIF_SYSCALL_AUDIT.
- * It's invalid to call this with @i + @n > 6; we only support system calls
- * taking up to 6 arguments.
  */
 void syscall_set_arguments(struct task_struct *task, struct pt_regs *regs,
-                          unsigned int i, unsigned int n,
                           const unsigned long *args)
 {
-       if (n == 0)
-               return;
-
-       if (i + n > SYSCALL_MAX_ARGS) {
-               pr_warn("%s called with max args %d, handling only %d\n",
-                       __func__, i + n, SYSCALL_MAX_ARGS);
-               n = SYSCALL_MAX_ARGS - i;
-       }
-
-       if (i == 0) {
-               regs->orig_r0 = args[0];
-               args++;
-               i++;
-               n--;
-       }
+       regs->orig_r0 = args[0];
+       args++;
 
-       memcpy(&regs->uregs[0] + i, args, n * sizeof(args[0]));
+       memcpy(&regs->uregs[0] + 1, args, 5 * sizeof(args[0]));
 }
 #endif /* _ASM_NDS32_SYSCALL_H */

diff --git a/arch/nios2/include/asm/syscall.h b/arch/nios2/include/asm/syscall.h
index 792bd44..d7624ed 100644 (file)
--- a/arch/nios2/include/asm/syscall.h
+++ b/arch/nios2/include/asm/syscall.h
@@ -69,42 +69,14 @@ static inline void syscall_get_arguments(struct task_struct *task,
 }
 
 static inline void syscall_set_arguments(struct task_struct *task,
-       struct pt_regs *regs, unsigned int i, unsigned int n,
-       const unsigned long *args)
+       struct pt_regs *regs, const unsigned long *args)
 {
-       BUG_ON(i + n > 6);
-
-       switch (i) {
-       case 0:
-               if (!n--)
-                       break;
-               regs->r4 = *args++;
-       case 1:
-               if (!n--)
-                       break;
-               regs->r5 = *args++;
-       case 2:
-               if (!n--)
-                       break;
-               regs->r6 = *args++;
-       case 3:
-               if (!n--)
-                       break;
-               regs->r7 = *args++;
-       case 4:
-               if (!n--)
-                       break;
-               regs->r8 = *args++;
-       case 5:
-               if (!n--)
-                       break;
-               regs->r9 = *args++;
-       case 6:
-               if (!n)
-                       break;
-       default:
-               BUG();
-       }
+       regs->r4 = *args++;
+       regs->r5 = *args++;
+       regs->r6 = *args++;
+       regs->r7 = *args++;
+       regs->r8 = *args++;
+       regs->r9 = *args;
 }
 
 #endif

diff --git a/arch/openrisc/include/asm/syscall.h b/arch/openrisc/include/asm/syscall.h
index 7260786..b4ff07c 100644 (file)
--- a/arch/openrisc/include/asm/syscall.h
+++ b/arch/openrisc/include/asm/syscall.h
@@ -63,11 +63,9 @@ syscall_get_arguments(struct task_struct *task, struct pt_regs *regs,
 
 static inline void
 syscall_set_arguments(struct task_struct *task, struct pt_regs *regs,
-                     unsigned int i, unsigned int n, const unsigned long *args)
+                     const unsigned long *args)
 {
-       BUG_ON(i + n > 6);
-
-       memcpy(&regs->gpr[3 + i], args, n * sizeof(args[0]));
+       memcpy(&regs->gpr[3], args, 6 * sizeof(args[0]));
 }
 
 static inline int syscall_get_arch(void)

diff --git a/arch/powerpc/include/asm/syscall.h b/arch/powerpc/include/asm/syscall.h
index 5c9b9dc..1243045 100644 (file)
--- a/arch/powerpc/include/asm/syscall.h
+++ b/arch/powerpc/include/asm/syscall.h
@@ -86,15 +86,12 @@ static inline void syscall_get_arguments(struct task_struct *task,
 
 static inline void syscall_set_arguments(struct task_struct *task,
                                         struct pt_regs *regs,
-                                        unsigned int i, unsigned int n,
                                         const unsigned long *args)
 {
-       BUG_ON(i + n > 6);
-       memcpy(&regs->gpr[3 + i], args, n * sizeof(args[0]));
+       memcpy(&regs->gpr[3], args, 6 * sizeof(args[0]));
 
        /* Also copy the first argument into orig_gpr3 */
-       if (i == 0 && n > 0)
-               regs->orig_gpr3 = args[0];
+       regs->orig_gpr3 = args[0];
 }
 
 static inline int syscall_get_arch(void)

diff --git a/arch/riscv/include/asm/syscall.h b/arch/riscv/include/asm/syscall.h
index 6adca18..a3d5273 100644 (file)
--- a/arch/riscv/include/asm/syscall.h
+++ b/arch/riscv/include/asm/syscall.h
@@ -81,18 +81,11 @@ static inline void syscall_get_arguments(struct task_struct *task,
 
 static inline void syscall_set_arguments(struct task_struct *task,
                                         struct pt_regs *regs,
-                                        unsigned int i, unsigned int n,
                                         const unsigned long *args)
 {
-       BUG_ON(i + n > 6);
-        if (i == 0) {
-                regs->orig_a0 = args[0];
-                args++;
-                n--;
-       } else {
-               i--;
-       }
-       memcpy(&regs->a1 + i, args, n * sizeof(regs->a1));
+       regs->orig_a0 = args[0];
+       args++;
+       memcpy(&regs->a1, args, 5 * sizeof(regs->a1));
 }
 
 static inline int syscall_get_arch(void)

diff --git a/arch/s390/include/asm/syscall.h b/arch/s390/include/asm/syscall.h
index ee0b1f6..59c3e91 100644 (file)
--- a/arch/s390/include/asm/syscall.h
+++ b/arch/s390/include/asm/syscall.h
@@ -74,15 +74,14 @@ static inline void syscall_get_arguments(struct task_struct *task,
 
 static inline void syscall_set_arguments(struct task_struct *task,
                                         struct pt_regs *regs,
-                                        unsigned int i, unsigned int n,
                                         const unsigned long *args)
 {
-       BUG_ON(i + n > 6);
+       unsigned int n = 6;
+
        while (n-- > 0)
-               if (i + n > 0)
-                       regs->gprs[2 + i + n] = args[n];
-       if (i == 0)
-               regs->orig_gpr2 = args[0];
+               if (n > 0)
+                       regs->gprs[2 + n] = args[n];
+       regs->orig_gpr2 = args[0];
 }
 
 static inline int syscall_get_arch(void)

diff --git a/arch/sh/include/asm/syscall_32.h b/arch/sh/include/asm/syscall_32.h
index 2bf1199..8c9d7e5 100644 (file)
--- a/arch/sh/include/asm/syscall_32.h
+++ b/arch/sh/include/asm/syscall_32.h
@@ -62,23 +62,14 @@ static inline void syscall_get_arguments(struct task_struct *task,
 
 static inline void syscall_set_arguments(struct task_struct *task,
                                         struct pt_regs *regs,
-                                        unsigned int i, unsigned int n,
                                         const unsigned long *args)
 {
-       /* Same note as above applies */
-       BUG_ON(i);
-
-       switch (n) {
-       case 6: regs->regs[1] = args[5];
-       case 5: regs->regs[0] = args[4];
-       case 4: regs->regs[7] = args[3];
-       case 3: regs->regs[6] = args[2];
-       case 2: regs->regs[5] = args[1];
-       case 1: regs->regs[4] = args[0];
-               break;
-       default:
-               BUG();
-       }
+       regs->regs[1] = args[5];
+       regs->regs[0] = args[4];
+       regs->regs[7] = args[3];
+       regs->regs[6] = args[2];
+       regs->regs[5] = args[1];
+       regs->regs[4] = args[0];
 }
 
 static inline int syscall_get_arch(void)

diff --git a/arch/sh/include/asm/syscall_64.h b/arch/sh/include/asm/syscall_64.h
index 4e8f646..22fad97 100644 (file)
--- a/arch/sh/include/asm/syscall_64.h
+++ b/arch/sh/include/asm/syscall_64.h
@@ -54,11 +54,9 @@ static inline void syscall_get_arguments(struct task_struct *task,
 
 static inline void syscall_set_arguments(struct task_struct *task,
                                         struct pt_regs *regs,
-                                        unsigned int i, unsigned int n,
                                         const unsigned long *args)
 {
-       BUG_ON(i + n > 6);
-       memcpy(&regs->regs[2 + i], args, n * sizeof(args[0]));
+       memcpy(&regs->regs[2], args, 6 * sizeof(args[0]));
 }
 
 static inline int syscall_get_arch(void)

diff --git a/arch/sparc/include/asm/syscall.h b/arch/sparc/include/asm/syscall.h
index 872dfee..4d07543 100644 (file)
--- a/arch/sparc/include/asm/syscall.h
+++ b/arch/sparc/include/asm/syscall.h
@@ -119,13 +119,12 @@ static inline void syscall_get_arguments(struct task_struct *task,
 
 static inline void syscall_set_arguments(struct task_struct *task,
                                         struct pt_regs *regs,
-                                        unsigned int i, unsigned int n,
                                         const unsigned long *args)
 {
-       unsigned int j;
+       unsigned int i;
 
-       for (j = 0; j < n; j++)
-               regs->u_regs[UREG_I0 + i + j] = args[j];
+       for (i = 0; i < 6; i++)
+               regs->u_regs[UREG_I0 + i] = args[i];
 }
 
 static inline int syscall_get_arch(void)

diff --git a/arch/um/include/asm/syscall-generic.h b/arch/um/include/asm/syscall-generic.h
index 25d00ac..98e50c5 100644 (file)
--- a/arch/um/include/asm/syscall-generic.h
+++ b/arch/um/include/asm/syscall-generic.h
@@ -67,43 +67,16 @@ static inline void syscall_get_arguments(struct task_struct *task,
 
 static inline void syscall_set_arguments(struct task_struct *task,
                                         struct pt_regs *regs,
-                                        unsigned int i, unsigned int n,
                                         const unsigned long *args)
 {
        struct uml_pt_regs *r = &regs->regs;
 
-       switch (i) {
-       case 0:
-               if (!n--)
-                       break;
-               UPT_SYSCALL_ARG1(r) = *args++;
-       case 1:
-               if (!n--)
-                       break;
-               UPT_SYSCALL_ARG2(r) = *args++;
-       case 2:
-               if (!n--)
-                       break;
-               UPT_SYSCALL_ARG3(r) = *args++;
-       case 3:
-               if (!n--)
-                       break;
-               UPT_SYSCALL_ARG4(r) = *args++;
-       case 4:
-               if (!n--)
-                       break;
-               UPT_SYSCALL_ARG5(r) = *args++;
-       case 5:
-               if (!n--)
-                       break;
-               UPT_SYSCALL_ARG6(r) = *args++;
-       case 6:
-               if (!n--)
-                       break;
-       default:
-               BUG();
-               break;
-       }
+       UPT_SYSCALL_ARG1(r) = *args++;
+       UPT_SYSCALL_ARG2(r) = *args++;
+       UPT_SYSCALL_ARG3(r) = *args++;
+       UPT_SYSCALL_ARG4(r) = *args++;
+       UPT_SYSCALL_ARG5(r) = *args++;
+       UPT_SYSCALL_ARG6(r) = *args;
 }
 
 /* See arch/x86/um/asm/syscall.h for syscall_get_arch() definition. */

diff --git a/arch/x86/include/asm/syscall.h b/arch/x86/include/asm/syscall.h
index 8dbb5c3..4c30547 100644 (file)
--- a/arch/x86/include/asm/syscall.h
+++ b/arch/x86/include/asm/syscall.h
@@ -138,63 +138,26 @@ static inline void syscall_get_arguments(struct task_struct *task,
 
 static inline void syscall_set_arguments(struct task_struct *task,
                                         struct pt_regs *regs,
-                                        unsigned int i, unsigned int n,
                                         const unsigned long *args)
 {
 # ifdef CONFIG_IA32_EMULATION
-       if (task->thread_info.status & TS_COMPAT)
-               switch (i) {
-               case 0:
-                       if (!n--) break;
-                       regs->bx = *args++;
-               case 1:
-                       if (!n--) break;
-                       regs->cx = *args++;
-               case 2:
-                       if (!n--) break;
-                       regs->dx = *args++;
-               case 3:
-                       if (!n--) break;
-                       regs->si = *args++;
-               case 4:
-                       if (!n--) break;
-                       regs->di = *args++;
-               case 5:
-                       if (!n--) break;
-                       regs->bp = *args++;
-               case 6:
-                       if (!n--) break;
-               default:
-                       BUG();
-                       break;
-               }
-       else
+       if (task->thread_info.status & TS_COMPAT) {
+               regs->bx = *args++;
+               regs->cx = *args++;
+               regs->dx = *args++;
+               regs->si = *args++;
+               regs->di = *args++;
+               regs->bp = *args;
+       } else
 # endif
-               switch (i) {
-               case 0:
-                       if (!n--) break;
-                       regs->di = *args++;
-               case 1:
-                       if (!n--) break;
-                       regs->si = *args++;
-               case 2:
-                       if (!n--) break;
-                       regs->dx = *args++;
-               case 3:
-                       if (!n--) break;
-                       regs->r10 = *args++;
-               case 4:
-                       if (!n--) break;
-                       regs->r8 = *args++;
-               case 5:
-                       if (!n--) break;
-                       regs->r9 = *args++;
-               case 6:
-                       if (!n--) break;
-               default:
-                       BUG();
-                       break;
-               }
+       {
+               regs->di = *args++;
+               regs->si = *args++;
+               regs->dx = *args++;
+               regs->r10 = *args++;
+               regs->r8 = *args++;
+               regs->r9 = *args;
+       }
 }
 
 static inline int syscall_get_arch(void)

diff --git a/arch/xtensa/include/asm/syscall.h b/arch/xtensa/include/asm/syscall.h
index 1504ce9..91dc06d 100644 (file)
--- a/arch/xtensa/include/asm/syscall.h
+++ b/arch/xtensa/include/asm/syscall.h
@@ -70,24 +70,13 @@ static inline void syscall_get_arguments(struct task_struct *task,
 
 static inline void syscall_set_arguments(struct task_struct *task,
                                         struct pt_regs *regs,
-                                        unsigned int i, unsigned int n,
                                         const unsigned long *args)
 {
        static const unsigned int reg[] = XTENSA_SYSCALL_ARGUMENT_REGS;
-       unsigned int j;
-
-       if (n == 0)
-               return;
-
-       if (WARN_ON_ONCE(i + n > SYSCALL_MAX_ARGS)) {
-               if (i < SYSCALL_MAX_ARGS)
-                       n = SYSCALL_MAX_ARGS - i;
-               else
-                       return;
-       }
+       unsigned int i;
 
-       for (j = 0; j < n; ++j)
-               regs->areg[reg[i + j]] = args[j];
+       for (i = 0; i < 6; ++i)
+               regs->areg[reg[i]] = args[i];
 }
 
 asmlinkage long xtensa_rt_sigreturn(struct pt_regs*);

diff --git a/include/asm-generic/syscall.h b/include/asm-generic/syscall.h
index 269e941..b88239e 100644 (file)
--- a/include/asm-generic/syscall.h
+++ b/include/asm-generic/syscall.h
@@ -120,21 +120,15 @@ void syscall_get_arguments(struct task_struct *task, struct pt_regs *regs,
  * syscall_set_arguments - change system call parameter value
  * @task:      task of interest, must be in system call entry tracing
  * @regs:      task_pt_regs() of @task
- * @i:         argument index [0,5]
- * @n:         number of arguments; n+i must be [1,6].
  * @args:      array of argument values to store
  *
- * Changes @n arguments to the system call starting with the @i'th argument.
- * Argument @i gets value @args[0], and so on.
- * An arch inline version is probably optimal when @i and @n are constants.
+ * Changes 6 arguments to the system call.
+ * The first argument gets value @args[0], and so on.
  *
  * It's only valid to call this when @task is stopped for tracing on
  * entry to a system call, due to %TIF_SYSCALL_TRACE or %TIF_SYSCALL_AUDIT.
- * It's invalid to call this with @i + @n > 6; we only support system calls
- * taking up to 6 arguments.
  */
 void syscall_set_arguments(struct task_struct *task, struct pt_regs *regs,
-                          unsigned int i, unsigned int n,
                           const unsigned long *args);
 
 /**