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authorMarkos Chandras <markos.chandras@imgtec.com>2014-01-22 18:40:03 +0400
committerRalf Baechle <ralf@linux-mips.org>2014-03-27 02:09:08 +0400
commit4c21b8fd8f146a22e1eaf92833a32e51f560e82a (patch)
tree4d784859ce5b207837ddb574e26264d78db33c74 /arch/mips/include/asm/ptrace.h
parent9d37c405ed7e4bb10798c37ef4e642b682425c4e (diff)
downloadlinux-4c21b8fd8f146a22e1eaf92833a32e51f560e82a.tar.xz
MIPS: seccomp: Handle indirect system calls (o32)
When userland uses syscall() to perform an indirect system call the actually system call that needs to be checked by the filter is on the first argument. The kernel code needs to handle this case by looking at the original syscall number in v0 and if it's NR_syscall, then it needs to examine the first argument to identify the real system call that will be executed. Similarly, we need to 'virtually' shift the syscall() arguments so the syscall_get_arguments() function can fetch the correct arguments for the indirect system call. Signed-off-by: Markos Chandras <markos.chandras@imgtec.com> Reviewed-by: James Hogan <james.hogan@imgtec.com> Reviewed-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/6404/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/include/asm/ptrace.h')
-rw-r--r--arch/mips/include/asm/ptrace.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/mips/include/asm/ptrace.h b/arch/mips/include/asm/ptrace.h
index 84257dfa3b60..bf1ac8d35783 100644
--- a/arch/mips/include/asm/ptrace.h
+++ b/arch/mips/include/asm/ptrace.h
@@ -82,7 +82,7 @@ static inline long regs_return_value(struct pt_regs *regs)
#define instruction_pointer(regs) ((regs)->cp0_epc)
#define profile_pc(regs) instruction_pointer(regs)
-extern asmlinkage long syscall_trace_enter(struct pt_regs *regs);
+extern asmlinkage long syscall_trace_enter(struct pt_regs *regs, long syscall);
extern asmlinkage void syscall_trace_leave(struct pt_regs *regs);
extern void die(const char *, struct pt_regs *) __noreturn;