John Baldwin 83382d027f Don't clear DR6 for debug exceptions from userland. ... This reverts part of r333368. The attempt to clear DR6 was occuring too soon as trapsignal() does not pause to let the debugger notice the SIGTRAP and query DR6. The signal exchange does not occur until much later during ast(). As a result, GDB was no longer recognizing hardware breakpoints and watchpoints on x86. In addition, any userland programs that want to inspect DR6 in a SIGTRAP handler don't have a way to do this if we clear DR6 in the exception handler. Instead of relying on the kernel to clear DR6, debuggers will have to explicitly clear it after a trace trap (which they needed to do on older kernels anyway). Reviewed by: kib Approved by: re (delphij) MFC after: 3 days Differential Revision: https://reviews.freebsd.org/D17319		2018-09-27 17:33:59 +00:00
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acpica	Rename assym.s to assym.inc	2018-03-20 17:58:51 +00:00
bios	Use NULL for SYSINIT's last arg, which is a pointer type	2018-05-18 17:58:09 +00:00
cloudabi32	Use TO_PTR() to convert integers to pointers.	2017-11-26 14:45:56 +00:00
conf	Revert drm2 removal.	2018-08-24 00:02:00 +00:00
i386	Don't clear DR6 for debug exceptions from userland.	2018-09-27 17:33:59 +00:00
ibcs2	Regen after 335177 (rename sys_obreak to sys_break).	2018-06-14 21:29:31 +00:00
include	Convert x86 cache invalidation functions to ifuncs.	2018-09-19 19:35:02 +00:00
linux	Fix the Linux kernel version number calculation	2018-06-22 00:02:03 +00:00
pci	Correct pseudo misspelling in sys/ comments	2018-02-23 18:15:50 +00:00
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