linux-dev/tools/testing/selftests/powerpc/ptrace/Makefile, branch master

selftests/powerpc/ptrace: Do more of ptrace-gpr in asm

2022-07-25T02:05:16Z

The ptrace-gpr test includes some inline asm to load GPR and FPR registers. It then goes back to C to wait for the parent to trace it and then checks register contents. The split between inline asm and C is fragile, it relies on the compiler not using any non-volatile GPRs after the inline asm block. It also requires a very large and unwieldy inline asm block. So convert the logic to set registers, wait, and store registers to a single asm function, meaning there's no window for the compiler to intervene. Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20220627140239.2464900-10-mpe@ellerman.id.au

selftests/powerpc/ptrace: Build the ptrace-gpr test as 32-bit when possible

2022-07-25T02:05:16Z

The ptrace-gpr test can now be built 32-bit, so do that if that's the compiler default rather than forcing a 64-bit build. Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20220627140239.2464900-9-mpe@ellerman.id.au

selftests/powerpc/ptrace: Split CFLAGS better

2022-07-25T02:05:15Z

Currently all ptrace tests are built 64-bit and with TM enabled. Only the TM tests need TM enabled, so split those out into a separate variable so that can be specified precisely. Split the rest of the tests into a variable, and add -m64 to CFLAGS for those tests, so that in a subsequent patch some tests can be made to build 32-bit. Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20220627140239.2464900-3-mpe@ellerman.id.au

selftests/powerpc/ptrace: Set LOCAL_HDRS

2022-07-25T02:05:15Z

Set LOCAL_HDRS so header changes cause rebuilds. The lib.mk logic adds all the headers in LOCAL_HDRS as dependencies, so there's no need to also list them explicitly. Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20220627140239.2464900-2-mpe@ellerman.id.au

powerpc/selftests: Add selftest to test concurrent perf/ptrace events

2021-04-22T15:38:03Z

ptrace and perf watchpoints can't co-exists if their address range overlaps. See commit 29da4f91c0c1 ("powerpc/watchpoint: Don't allow concurrent perf and ptrace events") for more detail. Add selftest for the same. Sample o/p: # ./ptrace-perf-hwbreak test: ptrace-perf-hwbreak tags: git_version:powerpc-5.8-7-118-g937fa174a15d-dirty perf cpu event -> ptrace thread event (Overlapping): Ok perf cpu event -> ptrace thread event (Non-overlapping): Ok perf thread event -> ptrace same thread event (Overlapping): Ok perf thread event -> ptrace same thread event (Non-overlapping): Ok perf thread event -> ptrace other thread event: Ok ptrace thread event -> perf kernel event: Ok ptrace thread event -> perf same thread event (Overlapping): Ok ptrace thread event -> perf same thread event (Non-overlapping): Ok ptrace thread event -> perf other thread event: Ok ptrace thread event -> perf cpu event (Overlapping): Ok ptrace thread event -> perf cpu event (Non-overlapping): Ok ptrace thread event -> perf same thread & cpu event (Overlapping): Ok ptrace thread event -> perf same thread & cpu event (Non-overlapping): Ok ptrace thread event -> perf other thread & cpu event: Ok success: ptrace-perf-hwbreak Signed-off-by: Ravi Bangoria Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20210412112218.128183-5-ravi.bangoria@linux.ibm.com

selftests/powerpc/ptrace: Fix out-of-tree build

2018-10-31T12:56:19Z

We should use TEST_GEN_PROGS, not TEST_PROGS. That tells the selftests makefile (lib.mk) that those tests are generated (built), and so it adds the $(OUTPUT) prefix for us, making the out-of-tree build work correctly. It also means we don't need our own clean rule, lib.mk does it. We also have to update the ptrace-pkey and core-pkey rules to use $(OUTPUT). Signed-off-by: Joel Stanley Signed-off-by: Michael Ellerman

Revert "selftests/powerpc: Fix out-of-tree build errors"

2018-10-26T10:58:58Z

This reverts commit d8a2fe29d3c97038c8efcc328d5e7940c5310565. That commit, by me, fixed the out of tree build errors by causing some of the tests not to build at all.

selftests/powerpc: Fix out-of-tree build errors

2018-10-20T02:26:47Z

Some of our Makefiles don't do the right thing when building the selftests with O=, fix them up. Signed-off-by: Michael Ellerman

Merge branch 'fixes' into next

2018-10-09T05:51:05Z

Merge our fixes branch. It has a few important fixes that are needed for futher testing and also some commits that will conflict with content in next.

selftests/powerpc: New PTRACE_SYSEMU test

2018-10-03T05:40:04Z

This patch adds a new test for the new PTRACE_SYSEMU ptrace request. This test also relies on PTRACE_GETREGS and PTRACE_SETREGS requests to run properly, since the trace instruction (gettid() syscall) is being modified at run-time (by PTRACE_SETREGS) and re-executed three times. PTRACE_GETREGS is being used to check that the registers are still sane. This test basically creates a child process that executes syscalls and the parent process check if it is being traced appropriately. The parent process guarantees that the SYSCALLs are being traced, with PTRACE_SYSEMU, and ptrace stops the child application before a syscall is executed. The way the tests validates it, is by guaranteeing that the system calls arguments, as argv[0] (r3) which is the same register that will have the syscall return value on powerpc, are not being corrupted on PTRACE_SYSEMU with a return value, i.e, it continues to have the current arguments instead, meaning that the registers where not clobbered. This test is basically the same test for x86 located at tools/testing/selftests/x86/ptrace_syscall.c, limited to test PTRACE_SYSEMU request, and ported to PowerPC. Signed-off-by: Breno Leitao Signed-off-by: Michael Ellerman