Combine x86 register tests into unified test function

Reduce the code duplication and improve maintainability of x86 register
tests by combining all of them to a single base function.

Add more debug to register writing tests

Add tests for PT_SETREGS

fix unused variable warnings.

Introduce tests for reading r8..r15 registers.

Add tests for reading pre-set general purpose register values via PT_GETREGS.

Add new tests verifying that PT_GETREGS provides correct register values
from the underlying program. The test uses inline assembly in the child program
to set registers to well-known constants, then compares the results obtained
via PT_GETREGS against them.

Reviewed by kamil.

Link t_ptrace_wait* tests with -pthread

While there, bump (c) for ATF ptrace(2) tests.

Add __used in infinite_thread() for consistency with other functions in
the file.

branches: 1.5.2;
Port the CVE 2018-8897 mitigation to i386 ATF ptrace(2) tests

On i386 there is no need to switch execution mode.
Use 0x23 SS selector for i386, amd64 used 0x4f.

Based on pointers from <maxv>.

Sponsored by <The NetBSD Foundation>

Simplify the x86_64_cve_2018_8897 ATF ptrace(2) test

Do not call _exit() from the child, ad this code shall not be reached.
Put there assert().

No functional change. The test still passes.

Sponsored by <The NetBSD Foundation>

Add a new ptrace(2) ATF exploit for: CVE-2018-8897 (POP SS debug exception)

The original expolit and mitigation have been developed by Maxime Villard.

I've reworked the shared code and adapted for the ATF context.
I've included PIE-aware version (RIP/EIP relative) and introduced
additional comments to the explanation how to trigger the flaw.

This test passes on NetBSD/8.99.17.

Sponsored by <The NetBSD Foundation>

branches: 1.2.2;
sync a bit more with reality; some things still fail, some new failures.
reduce spewage, be more explanatory about syscall errors.

branches: 1.1.2; 1.1.4; 1.1.8;
Import ptrace(2) tests into appropriate directory tests/lib/libc/sys/

This is the correct directory documented in tests/README for such tests.

Discussed with <martin>

Sponsored by <The NetBSD Foundation>

Add more debug to register writing tests

Add tests for PT_SETREGS

fix unused variable warnings.

Introduce tests for reading r8..r15 registers.

Add tests for reading pre-set general purpose register values via PT_GETREGS.

Add new tests verifying that PT_GETREGS provides correct register values
from the underlying program. The test uses inline assembly in the child program
to set registers to well-known constants, then compares the results obtained
via PT_GETREGS against them.

Reviewed by kamil.

Link t_ptrace_wait* tests with -pthread

While there, bump (c) for ATF ptrace(2) tests.

Add __used in infinite_thread() for consistency with other functions in
the file.

Port the CVE 2018-8897 mitigation to i386 ATF ptrace(2) tests

On i386 there is no need to switch execution mode.
Use 0x23 SS selector for i386, amd64 used 0x4f.

Based on pointers from <maxv>.

Sponsored by <The NetBSD Foundation>

Simplify the x86_64_cve_2018_8897 ATF ptrace(2) test

Do not call _exit() from the child, ad this code shall not be reached.
Put there assert().

No functional change. The test still passes.

Sponsored by <The NetBSD Foundation>

Add a new ptrace(2) ATF exploit for: CVE-2018-8897 (POP SS debug exception)

The original expolit and mitigation have been developed by Maxime Villard.

I've reworked the shared code and adapted for the ATF context.
I've included PIE-aware version (RIP/EIP relative) and introduced
additional comments to the explanation how to trigger the flaw.

This test passes on NetBSD/8.99.17.

Sponsored by <The NetBSD Foundation>

branches: 1.2.2;
sync a bit more with reality; some things still fail, some new failures.
reduce spewage, be more explanatory about syscall errors.

branches: 1.1.2; 1.1.4; 1.1.8;
Import ptrace(2) tests into appropriate directory tests/lib/libc/sys/

This is the correct directory documented in tests/README for such tests.

Discussed with <martin>

Sponsored by <The NetBSD Foundation>

Add tests for PT_SETREGS

fix unused variable warnings.

Introduce tests for reading r8..r15 registers.

Add tests for reading pre-set general purpose register values via PT_GETREGS.

Add new tests verifying that PT_GETREGS provides correct register values
from the underlying program. The test uses inline assembly in the child program
to set registers to well-known constants, then compares the results obtained
via PT_GETREGS against them.

Reviewed by kamil.

Link t_ptrace_wait* tests with -pthread

While there, bump (c) for ATF ptrace(2) tests.

Add __used in infinite_thread() for consistency with other functions in
the file.

Port the CVE 2018-8897 mitigation to i386 ATF ptrace(2) tests

On i386 there is no need to switch execution mode.
Use 0x23 SS selector for i386, amd64 used 0x4f.

Based on pointers from <maxv>.

Sponsored by <The NetBSD Foundation>

Simplify the x86_64_cve_2018_8897 ATF ptrace(2) test

Do not call _exit() from the child, ad this code shall not be reached.
Put there assert().

No functional change. The test still passes.

Sponsored by <The NetBSD Foundation>

Add a new ptrace(2) ATF exploit for: CVE-2018-8897 (POP SS debug exception)

The original expolit and mitigation have been developed by Maxime Villard.

I've reworked the shared code and adapted for the ATF context.
I've included PIE-aware version (RIP/EIP relative) and introduced
additional comments to the explanation how to trigger the flaw.

This test passes on NetBSD/8.99.17.

Sponsored by <The NetBSD Foundation>

branches: 1.2.2;
sync a bit more with reality; some things still fail, some new failures.
reduce spewage, be more explanatory about syscall errors.

branches: 1.1.2; 1.1.4; 1.1.8;
Import ptrace(2) tests into appropriate directory tests/lib/libc/sys/

This is the correct directory documented in tests/README for such tests.

Discussed with <martin>

Sponsored by <The NetBSD Foundation>

fix unused variable warnings.

Introduce tests for reading r8..r15 registers.

Add tests for reading pre-set general purpose register values via PT_GETREGS.

Add new tests verifying that PT_GETREGS provides correct register values
from the underlying program. The test uses inline assembly in the child program
to set registers to well-known constants, then compares the results obtained
via PT_GETREGS against them.

Reviewed by kamil.

Link t_ptrace_wait* tests with -pthread

While there, bump (c) for ATF ptrace(2) tests.

Add __used in infinite_thread() for consistency with other functions in
the file.

Port the CVE 2018-8897 mitigation to i386 ATF ptrace(2) tests

On i386 there is no need to switch execution mode.
Use 0x23 SS selector for i386, amd64 used 0x4f.

Based on pointers from <maxv>.

Sponsored by <The NetBSD Foundation>

Simplify the x86_64_cve_2018_8897 ATF ptrace(2) test

Do not call _exit() from the child, ad this code shall not be reached.
Put there assert().

No functional change. The test still passes.

Sponsored by <The NetBSD Foundation>

Add a new ptrace(2) ATF exploit for: CVE-2018-8897 (POP SS debug exception)

The original expolit and mitigation have been developed by Maxime Villard.

I've reworked the shared code and adapted for the ATF context.
I've included PIE-aware version (RIP/EIP relative) and introduced
additional comments to the explanation how to trigger the flaw.

This test passes on NetBSD/8.99.17.

Sponsored by <The NetBSD Foundation>

branches: 1.2.2;
sync a bit more with reality; some things still fail, some new failures.
reduce spewage, be more explanatory about syscall errors.

branches: 1.1.2; 1.1.4; 1.1.8;
Import ptrace(2) tests into appropriate directory tests/lib/libc/sys/

This is the correct directory documented in tests/README for such tests.

Discussed with <martin>

Sponsored by <The NetBSD Foundation>

Add tests for reading pre-set general purpose register values via PT_GETREGS.

Add new tests verifying that PT_GETREGS provides correct register values
from the underlying program. The test uses inline assembly in the child program
to set registers to well-known constants, then compares the results obtained
via PT_GETREGS against them.

Reviewed by kamil.

Link t_ptrace_wait* tests with -pthread

While there, bump (c) for ATF ptrace(2) tests.

Add __used in infinite_thread() for consistency with other functions in
the file.

Port the CVE 2018-8897 mitigation to i386 ATF ptrace(2) tests

On i386 there is no need to switch execution mode.
Use 0x23 SS selector for i386, amd64 used 0x4f.

Based on pointers from <maxv>.

Sponsored by <The NetBSD Foundation>

Simplify the x86_64_cve_2018_8897 ATF ptrace(2) test

Do not call _exit() from the child, ad this code shall not be reached.
Put there assert().

No functional change. The test still passes.

Sponsored by <The NetBSD Foundation>

Add a new ptrace(2) ATF exploit for: CVE-2018-8897 (POP SS debug exception)

The original expolit and mitigation have been developed by Maxime Villard.

I've reworked the shared code and adapted for the ATF context.
I've included PIE-aware version (RIP/EIP relative) and introduced
additional comments to the explanation how to trigger the flaw.

This test passes on NetBSD/8.99.17.

Sponsored by <The NetBSD Foundation>

branches: 1.2.2;
sync a bit more with reality; some things still fail, some new failures.
reduce spewage, be more explanatory about syscall errors.

branches: 1.1.2; 1.1.4; 1.1.8;
Import ptrace(2) tests into appropriate directory tests/lib/libc/sys/

This is the correct directory documented in tests/README for such tests.

Discussed with <martin>

Sponsored by <The NetBSD Foundation>

Link t_ptrace_wait* tests with -pthread

While there, bump (c) for ATF ptrace(2) tests.

Add __used in infinite_thread() for consistency with other functions in
the file.

Port the CVE 2018-8897 mitigation to i386 ATF ptrace(2) tests

On i386 there is no need to switch execution mode.
Use 0x23 SS selector for i386, amd64 used 0x4f.

Based on pointers from <maxv>.

Sponsored by <The NetBSD Foundation>

Simplify the x86_64_cve_2018_8897 ATF ptrace(2) test

Do not call _exit() from the child, ad this code shall not be reached.
Put there assert().

No functional change. The test still passes.

Sponsored by <The NetBSD Foundation>

Add a new ptrace(2) ATF exploit for: CVE-2018-8897 (POP SS debug exception)

The original expolit and mitigation have been developed by Maxime Villard.

I've reworked the shared code and adapted for the ATF context.
I've included PIE-aware version (RIP/EIP relative) and introduced
additional comments to the explanation how to trigger the flaw.

This test passes on NetBSD/8.99.17.

Sponsored by <The NetBSD Foundation>

branches: 1.2.2;
sync a bit more with reality; some things still fail, some new failures.
reduce spewage, be more explanatory about syscall errors.

branches: 1.1.2; 1.1.4; 1.1.8;
Import ptrace(2) tests into appropriate directory tests/lib/libc/sys/

This is the correct directory documented in tests/README for such tests.

Discussed with <martin>

Sponsored by <The NetBSD Foundation>

sync a bit more with reality; some things still fail, some new failures.
reduce spewage, be more explanatory about syscall errors.

branches: 1.1.2; 1.1.4;
Import ptrace(2) tests into appropriate directory tests/lib/libc/sys/

This is the correct directory documented in tests/README for such tests.

Discussed with <martin>

Sponsored by <The NetBSD Foundation>