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parisc: Add ARCH_TRACEHOOK and regset support

PATCH New Helge Deller 1 participant 1 message Apr 9, 2016

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Kselftest PA-RISC architecture ptrace support Secure computing
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Helge Deller

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PATCH 1/1 parisc: Add ARCH_TRACEHOOK and regset support

By adding TRACEHOOK support we now get a clean user interface to access registers via PTRACE_GETREGS, PTRACE_SETREGS, PTRACE_GETFPREGS and PTRACE_SETFPREGS.

The user-visible regset struct user_regs_struct and user_fp_struct are modelled similiar to x86 and can be accessed via PTRACE_GETREGSET.

Add support for the parisc architecture to the seccomp_bpf testcase.

Signed-off-by Helge Deller <[email protected]>
arch/parisc/Kconfig +1 -0
index bd3c873..ea72046 100644
@@ -31,6 +31,7 @@ config PARISC
 	select HAVE_DEBUG_STACKOVERFLOW
 	select HAVE_ARCH_AUDITSYSCALL
 	select HAVE_ARCH_SECCOMP_FILTER
+	select HAVE_ARCH_TRACEHOOK
 	select ARCH_NO_COHERENT_DMA_MMAP
 
 	help
arch/parisc/include/uapi/asm/ptrace.h +48 -0

65 lines not on this page · raw message

arch/parisc/kernel/ptrace.c +354 -2

400 lines not on this page · raw message

tools/testing/selftests/seccomp/seccomp_bpf.c +7 -1
index b9453b8..e9eec23 100644
@@ -1234,6 +1234,10 @@ TEST_F(TRACE_poke, getpid_runs_normally)
 # define ARCH_REGS	struct user_pt_regs
 # define SYSCALL_NUM	regs[8]
 # define SYSCALL_RET	regs[0]
+#elif defined(__hppa__)
+# define ARCH_REGS	struct user_regs_struct
+# define SYSCALL_NUM	gr[20]
+# define SYSCALL_RET	gr[28]
 #elif defined(__powerpc__)
 # define ARCH_REGS	struct pt_regs
 # define SYSCALL_NUM	gpr[0]

@@ -1293,7 +1297,7 @@ void change_syscall(struct __test_metadata *_metadata,
 	EXPECT_EQ(0, ret);
 
 #if defined(__x86_64__) || defined(__i386__) || defined(__powerpc__) || \
-    defined(__s390__)
+    defined(__s390__) || defined(__hppa__)
 	{
 		regs.SYSCALL_NUM = syscall;
 	}

@@ -1479,6 +1483,8 @@ TEST_F(TRACE_syscall, syscall_dropped)
 #  define __NR_seccomp 383
 # elif defined(__aarch64__)
 #  define __NR_seccomp 277
+# elif defined(__hppa__)
+#  define __NR_seccomp 338
 # elif defined(__powerpc__)
 #  define __NR_seccomp 358
 # elif defined(__s390__)