MFC 332906,332907,332976,333679,336053: Expand testing of breakpoints.

2018-09-06T22:23:39Z

332906: Extend support for ptrace() tests using breakpoints. - Use a single list of platforms to define HAVE_BREAKPOINT for platforms that expose a functional breakpoint() inline to userland. Replace existing lists of platform tests with HAVE_BREAKPOINT instead. - Add support for advancing PC past a breakpoint inserted via breakpoint() to support the existing ptrace__PT_CONTINUE_different_thread test on non-x86 platforms (x86 advances the PC past the breakpoint instruction, but other platforms do not). This is implemented by defining a new SKIP_BREAK macro which accepts a pointer to a 'struct reg' as its sole argument and modifies the contents to advance the PC. The intention is to use it in between PT_GETREGS and PT_SETREGS. 332907: Expose breakpoint() to userland from on MIPS. Enable ptrace() tests using breakpoint on MIPS as well. 332976: Shorten some recently-added lines that are an extra indent over 80 columns. 333679: Export a breakpoint() function to userland for riscv. As a result, enable tests using breakpoint() on riscv. 336053: Export a breakpoint() function to userland for arm and arm64. Enable ptrace() tests using breakpoint() on these architectures.

Import RISC-V machine headers. This is a minimal set required to compile

2015-12-17T18:44:30Z

kernel and userland. Reviewed by: andrew, imp, kib Sponsored by: DARPA, AFRL Sponsored by: HEIF5 Differential Revision: https://reviews.freebsd.org/D4554

src-test/sys/riscv/include/cpufunc.h, branch release/11.3.0

MFC 332906,332907,332976,333679,336053: Expand testing of breakpoints.

Import RISC-V machine headers. This is a minimal set required to compile