Commit Graph

124 Commits

Author SHA1 Message Date
John Baldwin
931983ee08 x86: Add a NT_X86_SEGBASES register set.
This register set contains the values of the fsbase and gsbase
registers.  Note that these registers can already be controlled
individually via ptrace(2) via MD operations, so the main reason for
adding this is to include these register values in core dumps.  In
particular, this will enable looking up the value of TLS variables
from core dumps in gdb.

The value of NT_X86_SEGBASES was chosen to match the value of
NT_386_TLS on Linux.  The notes serve similar purposes, but FreeBSD
will never dump a note equivalent to NT_386_TLS (which dumps a single
segment descriptor rather than a pair of addresses) and picking a
currently-unused value in the NT_X86_* range could result in a future
conflict.

Reviewed by:	markj
Differential Revision:	https://reviews.freebsd.org/D34650
2022-03-24 11:36:19 -07:00
John Baldwin
b2cb74c22c arm,arm64: Add a NT_ARM_TLS read-only register set.
This register set exposes the per-thread TLS register.  It matches the
layout used by Linux on arm64.  Linux does not implement this note for
32-bit arm.

Reviewed by:	andrew, markj
Sponsored by:	University of Cambridge, Google, Inc.
Differential Revision:	https://reviews.freebsd.org/D34595
2022-03-23 13:33:06 -07:00
John Baldwin
add00c381e Use a regset for NT_ARM_VFP.
This includes adding support for NT_ARM_VFP for 32-bit binaries
running under aarch64 kernels both for ptrace(), and coredumps via the
kernel and gcore.

Reviewed by:	andrew, markj
Sponsored by:	University of Cambridge, Google, Inc.
Differential Revision:	https://reviews.freebsd.org/D34448
2022-03-23 13:33:06 -07:00
John Baldwin
4965ac059d gcore: Use PT_GETREGSET to fetch NT_PRSTATUS and NT_FPREGSET.
Add a elf_putregnote() helper to build the ELF note for a register
set.  Once nice result of this approach is that this reuses the
kernel's support for generating 32-bit register sets for 32-bit
processes avoiding the need to duplicate that logic in elf32core.c.

Reviewed by:	markj
Sponsored by:	University of Cambridge, Google, Inc.
Differential Revision:	https://reviews.freebsd.org/D34447
2022-03-10 15:40:44 -08:00
Gordon Bergling
c8ca80e223 elf(3): Fix a typo in a sysctl description
- s/segement/segment/

MFC after:	3 days
2021-11-30 10:38:34 +01:00
Konstantin Belousov
73e8f06ac5 gcore: add option to dump core using kernel facility
-k switch causes gcore to use ptrace(PT_COREDUMP) instead of manually
reading process memory and constructing the core.

Reviewed by:	markj
Tested by:	pho
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
Differential revision:	https://reviews.freebsd.org/D29955
2021-05-03 19:18:26 +03:00
Konstantin Belousov
c192228b73 gcore: split code to open core file into helper
Reviewed by:	markj
Tested by:	pho
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
Differential revision:	https://reviews.freebsd.org/D29955
2021-05-03 19:18:26 +03:00
Andrew Turner
2a6803de1c Use MACHINE_CPUARCH when checking for arm64
Use MACHINE_CPUARCH with arm64 (aarch64) when we build code that could run
on any 64-bit Arm instruction set. This will simplify checks in downstream
consumers targeting prototype instruction sets.

The only place we check for MACHINE_ARCH == aarch64 is when building the
device tree blobs. As these are targeting current generation ISAs.

Sponsored by:	Innovate UK
Differential Revision:	https://reviews.freebsd.org/D26370
2020-09-14 16:12:28 +00:00
Mark Johnston
eae3ca5a06 gcore: Avoid using vm_map_entry_t.
Use an internally defined structure instead, to avoid relying on kernel
structure details.  No functional change intended.

MFC after:	1 week
2019-12-07 20:01:55 +00:00
Justin Hibbits
6a51741fc7 gcore: Don't add VSX notes on powerpcspe
powerpcspe does not support VSX at all, but gets the 'VMX' notes for free,
providing the SPE registers.
2019-11-16 18:24:28 +00:00
Justin Hibbits
942aefd567 gcore: Add powerpc64 32-bit gcore support
Summary: Add the necessary bits for taking 32-bit gcore coredumps on powerpc64.

Reviewed by:	luporl
Differential Revision:	https://reviews.freebsd.org/D21954
2019-10-11 14:17:31 +00:00
Justin Hibbits
26517dcf60 gcore: Add aarch64 32-bit core support
Summary: Add trivial 32-bit arm cores on aarch64 support for gcore.  This
doesn't handle fpregs.

Reviewed by:	#arm, andrew
Sponsored by:	Juniper Networks, Inc
Differential Revision:	https://reviews.freebsd.org/D21947
2019-10-11 14:15:50 +00:00
Justin Hibbits
5167f178ab Included VSX registers in powerpc core dumps
Summary: Included VSX registers in powerpc core dumps (both kernel and gcore)

Submitted by:	Luis Pires
Differential Revision: https://reviews.freebsd.org/D15512
2018-06-02 20:28:58 +00:00
Pedro F. Giffuni
1de7b4b805 various: general adoption of SPDX licensing ID tags.
Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error
prone - task.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

No functional change intended.
2017-11-27 15:37:16 +00:00
Pedro F. Giffuni
8a16b7a18f General further adoption of SPDX licensing ID tags.
Mainly focus on files that use BSD 3-Clause license.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

Special thanks to Wind River for providing access to "The Duke of
Highlander" tool: an older (2014) run over FreeBSD tree was useful as a
starting point.
2017-11-20 19:49:47 +00:00
Bryan Drewery
ea825d0274 DIRDEPS_BUILD: Update dependencies.
Sponsored by:	Dell EMC Isilon
2017-10-31 00:07:04 +00:00
John Baldwin
27efb0a242 Add a NT_ARM_VFP ELF core note to hold VFP registers for each thread.
The core note matches the format and layout of NT_ARM_VFP on Linux.
Debuggers use the AT_HWCAP flags to determine how many VFP registers
are actually used and their format.

Reviewed by:	mmel (earlier version w/o gcore)
MFC after:	1 month
Differential Revision:	https://reviews.freebsd.org/D12293
2017-09-14 15:07:48 +00:00
John Baldwin
51645e836d Store a 32-bit PT_LWPINFO struct for 32-bit process core dumps.
Process core notes for a 32-bit process running on a 64-bit host need to
use 32-bit structures so that the note layout matches the layout of notes
of a core dump of a 32-bit process under a 32-bit kernel.

Reviewed by:	kib
Differential Revision:	https://reviews.freebsd.org/D11407
2017-06-29 21:31:13 +00:00
Tycho Nightingale
86be94fca3 Add support for capturing 'struct ptrace_lwpinfo' for signals
resulting in a process dumping core in the corefile.

Also extend procstat to view select members of 'struct ptrace_lwpinfo'
from the contents of the note.

Sponsored by:	Dell EMC Isilon
2017-03-30 18:21:36 +00:00
Warner Losh
fbbd9655e5 Renumber copyright clause 4
Renumber cluase 4 to 3, per what everybody else did when BSD granted
them permission to remove clause 3. My insistance on keeping the same
numbering for legal reasons is too pedantic, so give up on that point.

Submitted by:	Jan Schaumann <jschauma@stevens.edu>
Pull Request:	https://github.com/freebsd/freebsd/pull/96
2017-02-28 23:42:47 +00:00
John Baldwin
3ff519254c Trim trailing whitespace (mostly introduced in r313407).
Sponsored by:	DARPA / AFRL
2017-02-08 17:45:23 +00:00
John Baldwin
885f13dc96 Copy the e_machine and e_flags fields from the binary into an ELF core dump.
In the kernel, cache the machine and flags fields from ELF header to use in
the ELF header of a core dump. For gcore, the copy these fields over from
the ELF header in the binary.

This matters for platforms which encode ABI information in the flags field
(such as o32 vs n32 on MIPS).

Reviewed by:	kib
Sponsored by:	DARPA / AFRL
Differential Revision:	https://reviews.freebsd.org/D9392
2017-02-07 20:34:03 +00:00
Bryan Drewery
9952941dd9 Cleanup some leftovers from '-s' removal in r302792.
MFC after:	2 weeks
Sponsored by:	Dell EMC Isilon
2016-11-17 23:16:56 +00:00
Conrad Meyer
8a263d910d Mirror r303120 to gcore
Sponsored by:	EMC / Isilon Storage Division
2016-07-21 00:53:14 +00:00
Conrad Meyer
bd0371c964 Add extended segment support to gcore
A follow-up to r303099, D7255.  Basically, apply the exact same change, with
the exact same rationale, to gcore.  gcore's elfcore.c is largely a clone of
the kernel imgact_elf coredump facility.

Reviewed by:	emaste (earlier version, not substantially different)
Requested by:	jhb
Sponsored by:	EMC / Isilon Storage Division
Differential Revision:	https://reviews.freebsd.org/D7265
2016-07-20 22:03:45 +00:00
John Baldwin
ccb83afd81 Include process IDs in core dumps.
When threads were added to the kernel, the pr_pid member of the
NT_PRSTATUS note was repurposed to store LWP IDs instead of process
IDs.  However, the process ID was no longer recorded in core dumps.
This change adds a pr_pid field to prpsinfo (NT_PRSINFO).  Rather than
bumping the prpsinfo version number, note parsers can use the note's
payload size to determine if pr_pid is present.

Reviewed by:	kib, emaste (older version)
MFC after:	2 months
Differential Revision:	https://reviews.freebsd.org/D7117
2016-07-18 15:14:23 +00:00
John Baldwin
c77547d2f9 Include command line arguments in core dump process info.
Fill in pr_psargs in the NT_PRSINFO ELF core dump note with command
line arguments.

Reviewed by:	kib
Differential Revision:	https://reviews.freebsd.org/D7116
2016-07-14 23:20:05 +00:00
Mark Johnston
0691d32ba4 Remove gcore's -s option.
It has no effect and is always implicitly set since ptrace(2) stops the
target process.
2016-07-14 00:32:27 +00:00
Mark Johnston
0367ff567c gcore: Forward pending signals when detaching from the target.
Otherwise gcore's ptrace attach operation can race with delivery of a
signal and cause it to be lost.

In collaboration with:	Suraj Raju <sraju@isilon.com>
Reviewed by:	bdrewery
Approved by:	re (gjb, kib)
MFC after:	2 weeks
Sponsored by:	EMC / Isilon Storage Division
2016-06-24 20:21:32 +00:00
Conrad Meyer
6a4b635383 Fix buffer overrun in gcore(1) NT_PRPSINFO
Use size of destination buffer, rather than a constant that may or may not
correspond to the source buffer, to restrict the length of copied strings.  In
particular, pr_fname has 16+1 characters but MAXCOMLEN is 18+1.

Use strlcpy instead of strncpy to ensure the result is nul-terminated.  This
seems to be what is expected of these fields.

Reported by:	Coverity
CIDs:		1011302, 1011378
Sponsored by:	EMC / Isilon Storage Division
2016-05-11 15:31:31 +00:00
Simon J. Gerraty
ccfb965433 Add META_MODE support.
Off by default, build behaves normally.
WITH_META_MODE we get auto objdir creation, the ability to
start build from anywhere in the tree.

Still need to add real targets under targets/ to build packages.

Differential Revision:       D2796
Reviewed by: brooks imp
2015-06-13 19:20:56 +00:00
Simon J. Gerraty
44d314f704 dirdeps.mk now sets DEP_RELDIR 2015-06-08 23:35:17 +00:00
Simon J. Gerraty
98e0ffaefb Merge sync of head 2015-05-27 01:19:58 +00:00
John Baldwin
dbee5c671a Move the 32-bit compatible procfs types from freebsd32.h to <sys/procfs.h>
and export them to userland.
- Define __HAVE_REG32 on platforms that define a reg32 structure and check
  for this in <sys/procfs.h> to control when to export prstatus32, etc.
- Add prstatus32_t and prpsinfo32_t typedefs for the 32-bit structures.
  libbfd looks for these types, and having them fixes 'gcore' in gdb of a
  32-bit process on a 64-bit platform.
- Use the structure definitions from <sys/procfs.h> in gcore's elf32 core
  dump code instead of duplicating the definitions.

Differential Revision:	https://reviews.freebsd.org/D2142
Reviewed by:	kib, nathanw (powerpc bits)
MFC after:	1 week
2015-04-08 16:30:45 +00:00
John Baldwin
bc411bc2d0 Include OBJT_PHYS VM objects in ELF core dumps. In particular this
includes the shared page allowing debuggers to use the signal trampoline
code to identify signal frames in core dumps.

Differential Revision:	https://reviews.freebsd.org/D1828
Reviewed by:	alc, kib
MFC after:	1 week
2015-02-14 17:12:31 +00:00
Justin Hibbits
b5d4909ec3 Make use of the new Altivec ptrace support, to save the Altivec registers in
gcore.

MFC after:	2 weeks
Relnotes:	yes
2015-01-14 07:02:21 +00:00
Baptiste Daroussin
3e11bd9e2a Convert to usr.bin/ to LIBADD
Reduce overlinking
2014-11-25 14:29:10 +00:00
John Baldwin
180e57e5c7 Improve support for XSAVE with debuggers.
- Dump an NT_X86_XSTATE note if XSAVE is in use. This note is designed
  to match what Linux does in that 1) it dumps the entire XSAVE area
  including the fxsave state, and 2) it stashes a copy of the current
  xsave mask in the unused padding between the fxsave state and the
  xstate header at the same location used by Linux.
- Teach readelf() to recognize NT_X86_XSTATE notes.
- Change PT_GET/SETXSTATE to take the entire XSAVE state instead of
  only the extra portion. This avoids having to always make two
  ptrace() calls to get or set the full XSAVE state.
- Add a PT_GET_XSTATE_INFO which returns the length of the current
  XSTATE save area (so the size of the buffer needed for PT_GETXSTATE)
  and the current XSAVE mask (%xcr0).

Differential Revision:	https://reviews.freebsd.org/D1193
Reviewed by:	kib
MFC after:	2 weeks
2014-11-21 20:53:17 +00:00
Simon J. Gerraty
9268022b74 Merge from head@274682 2014-11-19 01:07:58 +00:00
Simon J. Gerraty
ee7b0571c2 Merge head from 7/28 2014-08-19 06:50:54 +00:00
Kevin Lo
798d238f9c Remove an unsed variable. 2014-07-31 03:36:03 +00:00
Marcel Moolenaar
31d743df76 Create 32-bit core files for 32-bit processes on 64-bit machines.
The 64-bit machine supported right now is amd64, but it's not too
hard to add powerpc64.

Obtained from:	Juniper Networks, Inc.
2014-07-26 16:45:11 +00:00
Simon J. Gerraty
fae50821ae Updated dependencies 2014-05-16 14:09:51 +00:00
Simon J. Gerraty
76b28ad6ab Updated dependencies 2014-05-10 05:16:28 +00:00
Simon J. Gerraty
34b33809b7 Updated dependencies 2013-10-13 00:24:00 +00:00
Simon J. Gerraty
d1d0158641 Merge from head 2013-09-05 20:18:59 +00:00
Antoine Brodin
290b7b224a Add some missing DPADD. 2013-05-11 13:46:05 +00:00
Mikolaj Golub
e344fb0222 Wrong cast.
MFC after:	1 month
2013-04-20 15:37:33 +00:00
Mikolaj Golub
7fe6d16ef9 Sync gcore(1) with the recent changes in kernel code aimed at adding
procstat notes to a process core file.

Suggested by:	jhb
MFC after:	1 month
2013-04-20 08:23:19 +00:00
Simon J. Gerraty
7cf3a1c6b2 Updated dependencies 2013-03-11 17:21:52 +00:00