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From: Kees Cook <keescook@chromium.org>
To: linux-kernel@vger.kernel.org
Cc: Thadeu Lima de Souza Cascardo <cascardo@canonical.com>,
	Will Drewry <wad@chromium.org>, Kees Cook <keescook@chromium.org>,
	linux-xtensa@linux-xtensa.org,
	Michael Ellerman <mpe@ellerman.id.au>,
	linux-mips@vger.kernel.org, Andy Lutomirski <luto@amacapital.net>,
	Max Filippov <jcmvbkbc@gmail.com>,
	linux-arm-kernel@lists.infradead.org,
	linux-kselftest@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
	Christian Brauner <christian@brauner.io>
Subject: [PATCH 09/15] selftests/seccomp: Convert REGSET calls into ARCH_GETREG/ARCH_SETREG
Date: Sat, 12 Sep 2020 04:08:14 -0700	[thread overview]
Message-ID: <20200912110820.597135-10-keescook@chromium.org> (raw)
In-Reply-To: <20200912110820.597135-1-keescook@chromium.org>

Consolidate the REGSET logic into the new ARCH_GETREG() and
ARCH_SETREG() macros, avoiding more #ifdef code in function bodies.

Signed-off-by: Kees Cook <keescook@chromium.org>
---
 tools/testing/selftests/seccomp/seccomp_bpf.c | 42 +++++++------------
 1 file changed, 15 insertions(+), 27 deletions(-)

diff --git a/tools/testing/selftests/seccomp/seccomp_bpf.c b/tools/testing/selftests/seccomp/seccomp_bpf.c
index a986f2332327..d9346121b89b 100644
--- a/tools/testing/selftests/seccomp/seccomp_bpf.c
+++ b/tools/testing/selftests/seccomp/seccomp_bpf.c
@@ -1828,26 +1828,29 @@ TEST_F(TRACE_poke, getpid_runs_normally)
 #if defined(__x86_64__) || defined(__i386__) || defined(__mips__)
 # define ARCH_GETREGS(_regs)	ptrace(PTRACE_GETREGS, tracee, 0, &(_regs))
 # define ARCH_SETREGS(_regs)	ptrace(PTRACE_SETREGS, tracee, 0, &(_regs))
+#else
+# define ARCH_GETREGS(_regs)	({					\
+		struct iovec __v;					\
+		__v.iov_base = &(_regs);				\
+		__v.iov_len = sizeof(_regs);				\
+		ptrace(PTRACE_GETREGSET, tracee, NT_PRSTATUS, &__v);	\
+	})
+# define ARCH_SETREGS(_regs)	({					\
+		struct iovec __v;					\
+		__v.iov_base = &(_regs);				\
+		__v.iov_len = sizeof(_regs);				\
+		ptrace(PTRACE_SETREGSET, tracee, NT_PRSTATUS, &__v);	\
+	})
 #endif
 
 /* Architecture-specific syscall fetching routine. */
 int get_syscall(struct __test_metadata *_metadata, pid_t tracee)
 {
 	ARCH_REGS regs;
-#ifdef ARCH_GETREGS
-	EXPECT_EQ(0, ARCH_GETREGS(regs)) {
-		return -1;
-	}
-#else
-	struct iovec iov;
 
-	iov.iov_base = &regs;
-	iov.iov_len = sizeof(regs);
-	EXPECT_EQ(0, ptrace(PTRACE_GETREGSET, tracee, NT_PRSTATUS, &iov)) {
-		TH_LOG("PTRACE_GETREGSET failed");
+	EXPECT_EQ(0, ARCH_GETREGS(regs)) {
 		return -1;
 	}
-#endif
 
 	return SYSCALL_NUM(regs);
 }
@@ -1857,18 +1860,10 @@ void change_syscall(struct __test_metadata *_metadata,
 		    pid_t tracee, int syscall, int result)
 {
 	ARCH_REGS regs;
-#ifdef ARCH_GETREGS
+
 	EXPECT_EQ(0, ARCH_GETREGS(regs)) {
 		return;
 	}
-#else
-	int ret;
-	struct iovec iov;
-	iov.iov_base = &regs;
-	iov.iov_len = sizeof(regs);
-	ret = ptrace(PTRACE_GETREGSET, tracee, NT_PRSTATUS, &iov);
-	EXPECT_EQ(0, ret);
-#endif
 
 	SYSCALL_NUM_SET(regs, syscall);
 
@@ -1881,14 +1876,7 @@ void change_syscall(struct __test_metadata *_metadata,
 #endif
 
 	/* Flush any register changes made. */
-#ifdef ARCH_SETREGS
 	EXPECT_EQ(0, ARCH_SETREGS(regs));
-#else
-	iov.iov_base = &regs;
-	iov.iov_len = sizeof(regs);
-	ret = ptrace(PTRACE_SETREGSET, tracee, NT_PRSTATUS, &iov);
-	EXPECT_EQ(0, ret);
-#endif
 }
 
 void tracer_seccomp(struct __test_metadata *_metadata, pid_t tracee,
-- 
2.25.1


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  parent reply	other threads:[~2020-09-12 11:10 UTC|newest]

Thread overview: 39+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-12 11:08 [PATCH 00/15] selftests/seccomp: Refactor change_syscall() Kees Cook
2020-09-12 11:08 ` [PATCH 01/15] selftests/seccomp: Refactor arch register macros to avoid xtensa special case Kees Cook
2020-09-15 15:51   ` Christian Brauner
2020-09-12 11:08 ` [PATCH 02/15] selftests/seccomp: Provide generic syscall setting macro Kees Cook
2020-09-15 15:53   ` Christian Brauner
2020-09-12 11:08 ` [PATCH 03/15] selftests/seccomp: mips: Define SYSCALL_NUM_SET macro Kees Cook
2020-09-15 15:55   ` Christian Brauner
2020-09-18 22:00     ` Kees Cook
2020-09-12 11:08 ` [PATCH 04/15] selftests/seccomp: arm: " Kees Cook
2020-09-15 15:56   ` Christian Brauner
2020-09-12 11:08 ` [PATCH 05/15] selftests/seccomp: arm64: " Kees Cook
2020-09-15 15:58   ` Christian Brauner
2020-09-12 11:08 ` [PATCH 06/15] selftests/seccomp: mips: Remove O32-specific macro Kees Cook
2020-09-15 16:00   ` Christian Brauner
2020-09-12 11:08 ` [PATCH 07/15] selftests/seccomp: Remove syscall setting #ifdefs Kees Cook
2020-09-15 16:01   ` Christian Brauner
2020-09-12 11:08 ` [PATCH 08/15] selftests/seccomp: Convert HAVE_GETREG into ARCH_GETREG/ARCH_SETREG Kees Cook
2020-09-15 16:03   ` Christian Brauner
2020-09-12 11:08 ` Kees Cook [this message]
2020-09-15 16:05   ` [PATCH 09/15] selftests/seccomp: Convert REGSET calls " Christian Brauner
2020-09-12 11:08 ` [PATCH 10/15] selftests/seccomp: Avoid redundant register flushes Kees Cook
2020-09-15 16:08   ` Christian Brauner
2020-09-12 11:08 ` [PATCH 11/15] selftests/seccomp: Remove SYSCALL_NUM_RET_SHARE_REG in favor of SYSCALL_RET_SET Kees Cook
2020-09-15 16:11   ` Christian Brauner
2020-09-12 11:08 ` [PATCH 12/15] selftests/seccomp: powerpc: Fix seccomp return value testing Kees Cook
2020-09-14  3:38   ` Michael Ellerman
2020-09-12 11:08 ` [PATCH 13/15] selftests/seccomp: powerpc: Set syscall return during ptrace syscall exit Kees Cook
2020-09-14  5:47   ` Michael Ellerman
2020-09-14 20:20     ` Kees Cook
2020-09-12 11:08 ` [PATCH 14/15] selftests/clone3: Avoid OS-defined clone_args Kees Cook
2020-09-15 16:25   ` Christian Brauner
2020-09-18 22:00     ` Kees Cook
2020-09-12 11:08 ` [PATCH 15/15] selftests/seccomp: Use __NR_mknodat instead of __NR_mknod Kees Cook
2020-09-15 16:16   ` Christian Brauner
2020-09-14 12:15 ` [PATCH 00/15] selftests/seccomp: Refactor change_syscall() Michael Ellerman
2020-09-14 20:32   ` Kees Cook
2020-09-15 11:12     ` Max Filippov
2020-09-15 12:52     ` Michael Ellerman
2020-09-15  8:45 ` Max Filippov

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