CVS log for src/sys/arch/powerpc/include/mcontext.h

Up to [cvs.NetBSD.org] / src / sys / arch / powerpc / include

Request diff between arbitrary revisions

Keyword substitution: kv
Default branch: MAIN

Create a new header lwp_private.h to contain _lwp_getprivate_fast,
_lwp_gettcb_fast, _lwp_settcb and remove them from mcontext.h, so that:
1. we don't need special hacks to hide them
2. we can include <lwp.h> where needed to get the necessary prototypes
   without redefining them locally.

Undo previous lwp.h change.

Split __lwp_getprivate_fast and __lwp_*tcb from mcontext.h into a separate
lwp.h file.

Clean up the <sys/ucontext.h> <-> <machine/mcontext.h> interface up
a little:
- Define _UC_MD_BIT* constants for the available machine-dependent bits,
  and use those constants to define the machine-dependent bits as well
  as the machine-independent bits that have machine-dependent values.
- Explicitly generate an error if _UC_TLSBASE, _UC_SETSTACK, or
  _UC_CLRSTACK are not defined by <machine/mcontext.h>.

Add missing __{BEGIN,END}_DECLS in order to catch up with
sanitizer_linux_libcdep.cc rev 1.17:

http://cvsweb.netbsd.org/bsdweb.cgi/src/external/gpl3/gcc/dist/libsanitizer/sanitizer_common/sanitizer_linux_libcdep.cc#rev1.17

Fix build with HAVE_GCC=9.

Fix previous; hide userland ABI details for kernel as suggested by joerg:

http://mail-index.netbsd.org/source-changes-d/2020/06/21/msg012745.html

- Revive __lwp_settcb(), and call _lwp_setprivate(2) from it.

- Keep l_private opaque pointer for kernel; store raw value of %r2 in it.
  In the previous commit message, I wrote,

http://mail-index.netbsd.org/source-changes/2020/06/21/msg118524.html

> - Make sure that, like other ports, l_private represents address of tcb,
>   not biased one as in %r2.

  but, it turned out to be wrong. mips stores a biased address, at least.
  It is userland responsibility to interpret returned values from
  lwp_getprivate(2).

Fix inconsistency b/w kernel and userland recognitions of TLS, as well as
inconsistency whether it is biased or not in kernel.

- Obsolete __lwp_settcb() in order to let kernel know new TLS address via
  _lwp_setprivate(2). Alternatively, we can call _lwp_setprivate(2) within
  __lwp_settcb() like mips, but it is just double handling; we adjust %r2
  appropriately in _lwp_setprivate(2) via cpu_lwp_setprivate().

- Make sure that, like other ports, l_private represents address of tcb,
  not biased one as in %r2. This guarantees that the returned values from
  _lwp_getprivate(2) and __lwp_getprivate_fast() are always same. Also,
  we can obsolete PTRACE_LWP_GETPRIVATE() macro.

Now, *_pl_private tests in tests/lib/libc/sys successfully pass, while
no other tests become newly falling.

Fix SS_ONSTACK, which seems like broken since switched to siginfo.

Found by tests/lib/libc/sys/t_sigaltstack, which passes now, while
no other tests are not falling newly.

XXX
Shouldn't we turn _UC_{SET,CLR}STACK into MI?

Pull up the following, requested by kamil in ticket #552:

external/gpl3/gcc{.old}/dist/libsanitizer/asan/asan_linux.cc 1.4
sys/arch/aarch64/include/mcontext.h             1.2
sys/arch/alpha/include/mcontext.h               1.9
sys/arch/amd64/include/mcontext.h               1.19
sys/arch/arm/include/mcontext.h                 1.19
sys/arch/hppa/include/mcontext.h                1.9
sys/arch/i386/include/mcontext.h                1.14
sys/arch/ia64/include/mcontext.h                1.6
sys/arch/m68k/include/mcontext.h                1.10
sys/arch/mips/include/mcontext.h                1.22
sys/arch/or1k/include/mcontext.h                1.2
sys/arch/powerpc/include/mcontext.h             1.18
sys/arch/riscv/include/mcontext.h               1.5
sys/arch/sh3/include/mcontext.h                 1.11
sys/arch/sparc/include/mcontext.h               1.14-1.17
sys/arch/sparc64/include/mcontext.h             1.10
sys/arch/vax/include/mcontext.h                 1.9
tests/lib/libc/sys/Makefile                     1.50
tests/lib/libc/sys/t_ucontext.c                 1.2-1.5
sys/arch/hppa/include/mcontext.h		1.10
sys/arch/ia64/include/mcontext.h		1.7

- Introduce _UC_MACHINE_FP().  _UC_MACHINE_FP() is a helper
  macro to extract from mcontext a frame pointer.
- Add new tests in lib/libc/sys/t_ucontext:
  * ucontext_sp (testing _UC_MACHINE_SP)
  * ucontext_fp (testing _UC_MACHINE_FP)
  * ucontext_pc (testing _UC_MACHINE_PC)
  * ucontext_intrv (testing _UC_MACHINE_INTRV)

Add a dummy implementation of _UC_MACHINE_INTRV() for ia64.

Implement _UC_MACHINE_INTRV() for hppa.

Make the t_ucontext.c test more portable.

We now have _UC_MACHINE_FP.

revert ticket 552, which broke the build

Pull up following revision(s) (requested by kamil in ticket #552):
	sys/arch/aarch64/include/mcontext.h: 1.2
	sys/arch/alpha/include/mcontext.h: 1.9
	sys/arch/amd64/include/mcontext.h: 1.19
	sys/arch/arm/include/mcontext.h: 1.19
	sys/arch/hppa/include/mcontext.h: 1.9
	sys/arch/i386/include/mcontext.h: 1.14
	sys/arch/ia64/include/mcontext.h: 1.6
	sys/arch/m68k/include/mcontext.h: 1.10
	sys/arch/mips/include/mcontext.h: 1.22
	sys/arch/or1k/include/mcontext.h: 1.2
	sys/arch/powerpc/include/mcontext.h: 1.18
	sys/arch/riscv/include/mcontext.h: 1.5
	sys/arch/sh3/include/mcontext.h: 1.11
	sys/arch/sparc/include/mcontext.h: 1.14-1.17
	sys/arch/sparc64/include/mcontext.h: 1.10
	sys/arch/vax/include/mcontext.h: 1.9
	tests/lib/libc/sys/Makefile: 1.50
	tests/lib/libc/sys/t_ucontext.c: 1.2
Introduce _UC_MACHINE_FP() as a macro
_UC_MACHINE_FP() is a helper macro to extract from mcontext a frame pointer.
Don't rely on this interface as a compiler might strip frame pointer or
optimize it making this interface unreliable.
For hppa assume a small frame context, for larger frames FP might be located
in a different register (4 instead of 3).
For ia64 there is no strict frame pointer, and registers might rotate.
Reuse 79 following:
  ./gcc/config/ia64/ia64.h:#define HARD_FRAME_POINTER_REGNUM  LOC_REG (79)
Once ia64 will mature, this should be revisited.
A macro can encapsulate a real function for extracting Frame Pointer on
more complex CPUs / ABIs.
For the remaining CPUs, reuse standard register as defined in appropriate ABI.
The direct users of this macro are LLVM and GCC with Sanitizers.
Proposed on tech-userlevel@.
Sponsored by <The NetBSD Foundation>
--
Improve _UC_MACHINE_FP() for SPARC/SPARC64
Introduce a static inline function _uc_machine_fp() that contains improved
caluclation of a frame pointer.
Algorithm:
  uptr *stk_ptr;
#  if defined (__arch64__)
  stk_ptr = (uptr *) (*sp + 2047);
#  else
  stk_ptr = (uptr *) *sp;
#  endif
  *bp = stk_ptr[15];
Noted by <mrg>
--
Make _UC_MACHINE_FP() compile again and fix it so that it does not add
the offset twice.
--
fix _UC_MACHINE32_FP() -- use 32 bit pointer value so that [15] is
the right offset.  do this by using __greg32_t, which is only in
the sparc64 version, and these are only useful there, so move them.
--
Add new tests in lib/libc/sys/t_ucontext
New tests:
 - ucontext_sp
 - ucontext_fp
 - ucontext_pc
 - ucontext_intrv
They test respectively:
 - _UC_MACHINE_SP
 - _UC_MACHINE_FP
 - _UC_MACHINE_PC
 - _UC_MACHINE_INTRV
These tests attempt to access and print the values from ucontext, without
interpreting the values.
This is a follow up of the _UC_MACHINE_FP() introduction.
These tests use PRIxREGISTER, and require to be built with -D_KERNTYPES.
Sponsored by <The NetBSD Foundation>

Introduce _UC_MACHINE_FP() as a macro

_UC_MACHINE_FP() is a helper macro to extract from mcontext a frame pointer.

Don't rely on this interface as a compiler might strip frame pointer or
optimize it making this interface unreliable.


For hppa assume a small frame context, for larger frames FP might be located
in a different register (4 instead of 3).

For ia64 there is no strict frame pointer, and registers might rotate.
Reuse 79 following:

  ./gcc/config/ia64/ia64.h:#define HARD_FRAME_POINTER_REGNUM  LOC_REG (79)

Once ia64 will mature, this should be revisited.

A macro can encapsulate a real function for extracting Frame Pointer on
more complex CPUs / ABIs.


For the remaining CPUs, reuse standard register as defined in appropriate ABI.

The direct users of this macro are LLVM and GCC with Sanitizers.

Proposed on tech-userlevel@.

Sponsored by <The NetBSD Foundation>

update from HEAD

Rebase to HEAD as of a few days ago.

Avoid unncessary use of double in the kernel. With this change,
a LLVM build kernel fully works on TWRP1025.

Rebase.

Let the assembler bail out if the immediate is too large instead of
truncating it.

sync with head.

for a reference, the tree before this commit was tagged
as yamt-pagecache-tag8.

this commit was splitted into small chunks to avoid
a limitation of cvs.  ("Protocol error: too many arguments")

sync with head

Add mcontext32_t

sync with head

Add support for _UC_TLSBASE.  Make sure to preserve backwards compat for
programs built before TLS support was added.

Sync with HEAD.

sync with head

Add __lwp_gettcb_fast and __lwp_settcb helper inline functions

sync with head

Sync with HEAD

Be nicer to software that insists on -ansi and use __inline.

Allow storing and receiving the LWP private pointer via ucontext_t
on all platforms except VAX and IA64. Add fast access via register for
AMD64, i386 and SH3 ports. Use this fast access in libpthread to replace
the stack based pthread_self(). Implement skeleton support for Alpha,
HPPA, PowerPC, SPARC and SPARC64, but leave it disabled.

Ports that support this feature provide __HAVE____LWP_GETPRIVATE_FAST in
machine/types.h and a corresponding __lwp_getprivate_fast in
machine/mcontext.h.

This material is based upon work partially supported by
The NetBSD Foundation under a contract with Joerg Sonnenberger.

Sync with HEAD

Fix XER comment.
Add spe variants for vectors.

Add support for BookE Freescale MPC85xx (e500 core) processors.
Add fast softint support for PowerPC (though only booke uses it).
Redo FPU/VEC support and add e500 SPE support.
Rework trap/intrs to use a common trapframe format.
Support SOFTFLOAT (no hardfloat or fpu emulation) for BookE.

Add a _UC_POWERPC_SPE bit to indicate the vectors are from SPE.

Sync with HEAD.

sync with head.

sync with head.

Remove clause 3 and 4 from TNF licenses

merge ktrace-lwp.

Fix the sync with head I botched.

Sync with HEAD.

Sync with HEAD

Add some accessor macros for the ucontext:
* _UC_MACHINE_PC() - access the program counter
* _UC_MACHINE_INTRV() - access the integer return value register
* _UC_MACHINE_SET_PC() - set the program counter (this requires
  special handling on some platforms).

__greg_t should be an long, not int.  (LP64 friendliness)

Kill all references to struct __gregs and use the _REG_xx names.

Add _REG_foo to ppc mcontext and use them instead of constants.

Merge the nathanw_sa branch.

Add a macro, _UC_MACHINE_SP(), to fetch the user stack pointer from
a ucontext_t.

Back out last (DUMB!) change.

alias sc_pc for debug pthreads code.

Initial SA support for ppc.  Test-booted on sandpoint, macppc, & walnut.
mcontext and cpu_getmcontext()/cpu_setmcontext() from Klaus Klein
<kleink@netbsd.org>.

file mcontext.h was initially added on branch nathanw_sa.