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MIPS: asm: syscall: Fix copying system call arguments

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The syscall_get_arguments function expects the arguments to be copied
to the '*args' argument but instead a local variable was used to hold
the system call argument. As a result of which, this variable was
never passed to the filter and any filter testing the system call
arguments would fail. This is fixed by passing the '*args' variable
as the destination memory for the system call arguments.

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Reviewed-by: Paul Burton <paul.burton@imgtec.com>
Reviewed-by: James Hogan <james.hogan@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/6402/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Markos Chandras 2014-01-22 14:39:57 +00:00 committed by Ralf Baechle
parent 7f02c46305
commit a8031d2ce1
1 changed files with 1 additions and 2 deletions
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3
arch/mips/include/asm/syscall.h
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@ -86,11 +86,10 @@ static inline void syscall_get_arguments(struct task_struct *task,
unsigned int i, unsigned int n,
unsigned long *args)
{
unsigned long arg;
int ret;
while (n--)
ret |= mips_get_syscall_arg(&arg, task, regs, i++);
ret |= mips_get_syscall_arg(args++, task, regs, i++);
/*
* No way to communicate an error because this is a void function.