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freebsd-dev/sys/amd64/include
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John Baldwin 9e2154ff1c Cleanups related to debug exceptions on x86. 
- Add constants for fields in DR6 and the reserved fields in DR7.  Use
  these constants instead of magic numbers in most places that use DR6
  and DR7.
- Refer to T_TRCTRAP as "debug exception" rather than a "trace trap"
  as it is not just for trace exceptions.
- Always read DR6 for debug exceptions and only clear TF in the flags
  register for user exceptions where DR6.BS is set.
- Clear DR6 before returning from a debug exception handler as
  recommended by the SDM dating all the way back to the 386.  This
  allows debuggers to determine the cause of each exception.  For
  kernel traps, clear DR6 in the T_TRCTRAP case and pass DR6 by value
  to other parts of the handler (namely, user_dbreg_trap()).  For user
  traps, wait until after trapsignal to clear DR6 so that userland
  debuggers can read DR6 via PT_GETDBREGS while the thread is stopped
  in trapsignal().

Reviewed by:	kib, rgrimes
MFC after:	1 month
Differential Revision:	https://reviews.freebsd.org/D15189
2018-05-22 00:45:00 +00:00
..
pc sys/amd64: further adoption of SPDX licensing ID tags. 2017-11-27 15:03:07 +00:00
xen x86/xen: Consolidate xen-os.h in a single place 2015-10-21 10:04:35 +00:00
_align.h
_bus.h sys/amd64: further adoption of SPDX licensing ID tags. 2017-11-27 15:03:07 +00:00
_inttypes.h
_limits.h
_stdint.h
_types.h
acpica_machdep.h
apm_bios.h
asm.h Remove lint support from system headers and MD x86 headers. 2017-11-23 11:40:16 +00:00
asmacros.h Make the common interrupt entry point labels local labels. 2018-05-14 17:27:53 +00:00
atomic.h Add atomic_load(9) and atomic_store(9) operations. 2017-12-19 09:59:20 +00:00
bus_dma.h sys/amd64: further adoption of SPDX licensing ID tags. 2017-11-27 15:03:07 +00:00
bus.h
clock.h
counter.h sys/amd64: further adoption of SPDX licensing ID tags. 2017-11-27 15:03:07 +00:00
cpu.h amd64: Protect the kernel text, data, and BSS by setting the RW/NX bits 2018-03-06 14:28:37 +00:00
cpufunc.h Add STAC and CLAC instructions wrappers. 2018-01-14 12:39:50 +00:00
cputypes.h Remove 'cpu' and 'cpu_class' on amd64. 2016-09-15 17:05:54 +00:00
db_machdep.h Cleanups related to debug exceptions on x86. 2018-05-22 00:45:00 +00:00
dump.h Factor out duplicated code from dumpsys() on each architecture into generic 2015-01-07 01:01:39 +00:00
efi.h Revert r330780, it was improperly tested and results in taking a spin 2018-03-11 20:13:15 +00:00
elf.h
endian.h
exec.h sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
fdt.h
float.h
floatingpoint.h spdx: initial adoption of licensing ID tags. 2017-11-18 14:26:50 +00:00
fpu.h Remove unused error return from API that cannot fail 2018-02-23 20:15:19 +00:00
frame.h PTI for amd64. 2018-01-17 11:44:21 +00:00
gdb_machdep.h amd64: Protect the kernel text, data, and BSS by setting the RW/NX bits 2018-03-06 14:28:37 +00:00
ieeefp.h spdx: initial adoption of licensing ID tags. 2017-11-18 14:26:50 +00:00
in_cksum.h sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
intr_machdep.h Restore r331606 with a bugfix to setup cpuset_domain[] earlier on all 2018-03-28 18:47:35 +00:00
iodev.h sys/amd64: further adoption of SPDX licensing ID tags. 2017-11-27 15:03:07 +00:00
kdb.h sys/amd64: further adoption of SPDX licensing ID tags. 2017-11-27 15:03:07 +00:00
limits.h sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
md_var.h Add Intel Spec Store Bypass Disable control. 2018-05-21 21:08:19 +00:00
memdev.h sys/amd64: further adoption of SPDX licensing ID tags. 2017-11-27 15:03:07 +00:00
metadata.h Move amd64 metadata.h to x86 and share with i386 2016-01-07 19:47:26 +00:00
minidump.h sys/amd64: further adoption of SPDX licensing ID tags. 2017-11-27 15:03:07 +00:00
mp_watchdog.h sys/amd64: further adoption of SPDX licensing ID tags. 2017-11-27 15:03:07 +00:00
nexusvar.h
npx.h
ofw_machdep.h
param.h spdx: initial adoption of licensing ID tags. 2017-11-18 14:26:50 +00:00
pcb.h PTI: Trap if we returned to userspace with kernel (full) page table 2018-01-19 22:10:29 +00:00
pci_cfgreg.h
pcpu.h Expand the checks for UCR3 == PMAP_NO_CR3 to enable processes to be 2018-04-27 12:44:20 +00:00
pmap.h Use PCID to optimize PTI. 2018-01-27 11:49:37 +00:00
pmc_mdep.h sys/amd64: further adoption of SPDX licensing ID tags. 2017-11-27 15:03:07 +00:00
ppireg.h sys/amd64: further adoption of SPDX licensing ID tags. 2017-11-27 15:03:07 +00:00
proc.h Amd64 user_ldt_deref() is not used outside sys_machdep.c. Mark it as 2018-01-17 11:21:03 +00:00
profile.h Remove lint support from system headers and MD x86 headers. 2017-11-23 11:40:16 +00:00
psl.h
ptrace.h
pvclock.h Generalized parts of the XEN timer code into a generic pvclock 2015-02-04 08:26:43 +00:00
reg.h
reloc.h sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
resource.h
runq.h sys/amd64: further adoption of SPDX licensing ID tags. 2017-11-27 15:03:07 +00:00
segments.h sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
setjmp.h
sf_buf.h sys/amd64: further adoption of SPDX licensing ID tags. 2017-11-27 15:03:07 +00:00
sgx.h Add support for Intel Software Guard Extensions (Intel SGX). 2017-08-16 10:38:06 +00:00
sgxreg.h Add support for Intel Software Guard Extensions (Intel SGX). 2017-08-16 10:38:06 +00:00
sigframe.h
signal.h
smp.h x86: improve reservation of AP trampoline memory 2018-04-05 14:39:51 +00:00
specialreg.h
stack.h Merge stack(9) implementations for i386 and amd64 under x86/. 2015-09-11 03:24:07 +00:00
stdarg.h
sysarch.h
timerreg.h sys/amd64: further adoption of SPDX licensing ID tags. 2017-11-27 15:03:07 +00:00
trap.h
tss.h sys: further adoption of SPDX licensing ID tags. 2017-11-20 19:43:44 +00:00
ucontext.h
vdso.h
vm.h sys/amd64: further adoption of SPDX licensing ID tags. 2017-11-27 15:03:07 +00:00
vmm_dev.h Add the ability to control the CPU topology of created VMs 2018-04-08 19:24:49 +00:00
vmm_instruction_emul.h Add a new variant of the GLA2GPA ioctl for use by the debug server. 2018-02-26 19:19:05 +00:00
vmm.h vmmdev: return EFAULT when trying to read beyond VM system memory max address 2018-05-15 17:20:58 +00:00
vmparam.h Improve VM page queue scalability. 2018-04-24 21:15:54 +00:00