[PATCH 0/8] Add support for $_siginfo on FreeBSD

John Baldwin
2017-06-29T23:33:21Z

This series adds support for $_siginfo for both live processes and
process cores. siginfo_t for threads is only stored in a per-thread
ELF core note on FreeBSD 12.0 and later.

The existing code in corelow.c for siginfo_t assumed the Linux-specific
NT_SIGINFO ELF core note, but FreeBSD stores siginfo as one member of a
larger ELF core note. To accomodate this, I added a new gdbarch method
that is used to fetch the signal information from a core dump. I moved
the body of the existing core_get_siginfo function into an implementation
of the new gdbarch method in linux-tdep.c.

Tested on FreeBSD/amd64 (64-bit and 32-bit binaries), FreeBSD/i386,
and Centos/x86-64 (no regressions in test suite for this last).

John Baldwin (8):
Implement the "get_siginfo_type" gdbarch method for FreeBSD
architectures.
Fetch signal information for native FreeBSD processes.
Move the thread_section_name class to gdbcore.h.
Add a new gdbarch method to fetch signal information from core files.
Use the thread_section_name helper class in fbsd_core_thread_name.
Recognize the recently-added FreeBSD core dump note for LWP info.
Create psuedo sections for FreeBSD NT_PTLWPINFO core notes.
Read signal information from FreeBSD core dumps.

bfd/ChangeLog | 4 ++
bfd/elf.c | 4 ++
binutils/ChangeLog | 4 ++
binutils/readelf.c | 2 +
gdb/ChangeLog | 43 +++++++++++
gdb/corelow.c | 82 ++++-----------------
gdb/fbsd-nat.c | 155 ++++++++++++++++++++++++++++++++++++++++
gdb/fbsd-tdep.c | 197 +++++++++++++++++++++++++++++++++++++++++++++++++--
gdb/gdbarch.c | 32 +++++++++
gdb/gdbarch.h | 10 +++
gdb/gdbarch.sh | 5 ++
gdb/gdbcore.h | 45 ++++++++++++
gdb/linux-tdep.c | 21 ++++++
include/ChangeLog | 4 ++
include/elf/common.h | 1 +
15 files changed, 536 insertions(+), 73 deletions(-)

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2.11.0