src/sys/mips/include/proc.h, branch release/13.2.0

Implement GET_STACK_USAGE on remaining archs

2021-12-07T18:13:47Z

This definition enables callers to estimate remaining space on the kstack, and take action on it. Notably, it enables optimizations in the GEOM and netgraph subsystems to directly dispatch work items when there is sufficient stack space, rather than queuing them for a worker thread. Implement it for riscv, arm, and mips. Remove the #ifdefs, so it will not go unimplemented elsewhere. PR: 259157 Reviewed by: mav, kib, markj (previous version) MFC after: 1 week Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D32580 (cherry picked from commit 0d2224733e970aaa67a4e1af7b340044adda92f6)

Remove 'struct trapframe' pointer from mips64's 'struct syscall_args'.

2020-11-06T19:19:51Z

While here, use MAXARGS. This brings its 'struct syscall_args' in sync with most other architectures. Reviewed by: arichardson, brooks MFC after: 2 weeks Sponsored by: EPSRC Differential Revision: https://reviews.freebsd.org/D26619

Get rid of sa->narg. It serves no purpose; use sa->callp->sy_narg instead.

2020-09-27T18:47:06Z

Reviewed by: kib Sponsored by: DARPA Differential Revision: https://reviews.freebsd.org/D26458

Various fixes to TLS for MIPS.

2020-06-12T21:21:18Z

- Clear the current thread's TLS pointer on exec. Previously the TLS pointer (and register) remain unchanged. - Explicitly clear the TLS pointer when new threads are created. - Make md_tls_tcb_offset per-process instead of per-thread. The layout of the TLS and TCB are identical for all threads in a process, it is only the TLS pointer values themselves that vary by thread. This also makes setting md_tls_tcb_offset in cpu_set_user_tls() redundant with the setting in exec_setregs(), so only set it in exec_setregs(). Submitted by: Alfredo Mazzinghi (1) Sponsored by: DARPA Differential Revision: https://reviews.freebsd.org/D24957

mips: avoid empty mdproc struct

2019-08-19T18:15:17Z

Compiling with a more modern toolchain than GCC 4.2 in base warns about the empty struct. Take a hint and comment from r350902+r350953 by luporl@.

Fix PT_STEP single-stepping for mips.

2018-04-24T17:53:16Z

Note that GDB at least implements single stepping for MIPS using software breakpoints explicitly rather than using PT_STEP, so this has only been tested via tests in ptrace_test which now pass rather than fail. - Fix several places to use uintptr_t instead of int for virtual addresses. - Check for errors from ptrace_read_int() when setting a breakpoint for a step. - Properly check for errors from ptrace_write_int() as it returns non-zero, not negative values on failure. - Change the error returns for ptrace_read_int() and ptrace_write_int() from ENOMEM to EFAULT. - Clear a single step breakpoint when it traps rather than waiting for it to be cleared from ptrace(). This matches the behavior of the arm port and in general seems a bit more reliable than waiting for ptrace() to clear it via FIX_SSTEP. - Drop the PROC_LOCK around ptrace_write_int() in ptrace_clear_single_step() since it can sleep. - Reorder the breakpoint handler in trap() to only read the instruction if the address matches the current thread's breakpoint address. - Replace various #if 0'd debugging printfs with KTR_PTRACE traces. Tested on: mips64

sys: further adoption of SPDX licensing ID tags.

2017-11-20T19:43:44Z

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.

Make struct syscall_args visible to userspace compilation environment

2017-06-12T20:53:44Z

from machine/proc.h, consistently on all architectures. Reviewed by: jhb Sponsored by: The FreeBSD Foundation MFC after: 3 weeks X-Differential revision: https://reviews.freebsd.org/D11080

Renumber copyright clause 4

2017-02-28T23:42:47Z

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 Pull Request: https://github.com/freebsd/freebsd/pull/96

The TLS offset is a property of the process ABI.

2016-09-15T17:25:52Z

Move to a per-proc TLS offset rather than incorrectly keying off the presense of freebsd32 compability in the kernel. Reviewed by: adrian, sbruno Obtained from: CheriBSD Sponsored by: DARPA, AFRL Differential Revision: https://reviews.freebsd.org/D7843