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MIPS: asm: syscall: Define syscall_get_arch 

This effectively renames __syscall_get_arch to syscall_get_arch
and implements a compatible interface for the seccomp API.
The seccomp code (kernel/seccomp.c) expects a syscall_get_arch
function to be defined for every architecture, so we drop
the leading underscores from the existing function.

This also makes use of the 'task' argument to determine the type
the process instead of assuming the process has the same
characteristics as the kernel it's running on.

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/6398/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Markos Chandras 2014-01-22 14:39:59 +00:00 committed by Ralf Baechle
parent 22feadbe4c
commit 6e34574603
2 changed files with 5 additions and 3 deletions
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6
arch/mips/include/asm/syscall.h
View File

@ -107,11 +107,13 @@ extern const unsigned long sys_call_table[];
extern const unsigned long sys32_call_table[];
extern const unsigned long sysn32_call_table[];
static inline int __syscall_get_arch(void)
static inline int syscall_get_arch(struct task_struct *task,
struct pt_regs *regs)
{
int arch = EM_MIPS;
#ifdef CONFIG_64BIT
arch |= __AUDIT_ARCH_64BIT;
if (!test_tsk_thread_flag(task, TIF_32BIT_REGS))
arch |= __AUDIT_ARCH_64BIT;
#endif
#if defined(__LITTLE_ENDIAN)
arch |= __AUDIT_ARCH_LE;

2
arch/mips/kernel/ptrace.c
View File

@ -677,7 +677,7 @@ asmlinkage void syscall_trace_enter(struct pt_regs *regs)
if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT)))
trace_sys_enter(regs, regs->regs[2]);
audit_syscall_entry(__syscall_get_arch(),
audit_syscall_entry(syscall_get_arch(current, regs),
regs->regs[2],
regs->regs[4], regs->regs[5],
regs->regs[6], regs->regs[7]);