move to the new compat layout.

Use RET and RETc for returning.

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22280, verified by myself.

NetBSD/acorn26 has been using APCS-32 for years, so unifdef -U__APCS_26__.

Changes needed for ARM ELF shared library support.

branches: 1.3.2;
Use SYSTRAP() everywhere rather than coding SWI instructions directly.

Add some explanatory comments.

Create shared ARM source for libc, and move arm26 port over to using it.
The code is (almost) a direct copy of the current arm26 sources.
It's identical to the current arm32 sources, with the following exceptions:
- _C_LABEL is used on references to C labels from assembler.
- Function returns in assembler have APCS-26 versions in #ifdef __APCS_26__.
- It uses SoftFloat 2a rather than SoftFloat 1a.

The first two of these should be inconsequential. I believe that SoftFloat 2a
should work on arm32 and be backward-compatible with existing code, but this
is not obviously true. For now, arm32 remains using its own bits of libc.

Always compile as ARM even if -mthumb is given.

Enforce that this must be not compiled using Thumb1

Add $NetBSD$ tag. Use ip to save r1 instead of the stack.

branches: 1.2.2; 1.2.4; 1.2.6; 1.2.8;
Add workaround for ARM cores that don't properly implement the MRC instruction
used for reading the thread pointer. This is the corresponding change which
was made to <arm/mcontext.h>

Hook up TLS support on ARM. Tested by martin@, kernel support from matt@

Do previous differtly by pushing two registers in the same way as the
_INVOKE_CERROR macro

The _INVOKE_CERROR macro deals with thumb so simplify the code (at the
expense of a couple more instructions).

Trailing whitespace

Fix previous. For Thumb-1:
- sp cannot be manipulated directly
- {add,sub}s should be used instead of {add,sub}

Align sp to 8-byte boundary as required by EABI.

IIUC, this change only affects libc compiled for ``Thumb-mode userland'',
which we've not officially supported yet.

branches: 1.9.28;
Use PLT_SYM.

Use less got, add END(), make thumb tolerant.

CERROR is now hidden so no need to call it via the PLT

branches: 1.6.10; 1.6.44; 1.6.50;
It's "its."

Use RETc for returning. When v4T or later use BX for calling the target.

NetBSD/acorn26 has been using APCS-32 for years, so unifdef -U__APCS_26__.

Do the appropriate PIC magic for the jump to _exit().

Local label fixup.

branches: 1.1.2; 1.1.4;
Add __clone() for arm.

move to the new compat layout.

Create shared ARM source for libc, and move arm26 port over to using it.
The code is (almost) a direct copy of the current arm26 sources.
It's identical to the current arm32 sources, with the following exceptions:
- _C_LABEL is used on references to C labels from assembler.
- Function returns in assembler have APCS-26 versions in #ifdef __APCS_26__.
- It uses SoftFloat 2a rather than SoftFloat 1a.

The first two of these should be inconsequential. I believe that SoftFloat 2a
should work on arm32 and be backward-compatible with existing code, but this
is not obviously true. For now, arm32 remains using its own bits of libc.

Merge all MD __sigaction14_sigtramp.c copies into one:
- sparc and sparc64 were not using version 0 sigcontext when there were
no arguments in the signal version. This was probably a bug.
- vax is using +1 the version numbers of the other archs.
- Only hppa was defining __LIBC12_SOURCE__ so it was getting a working
sigcontext before. all the other ports that supported sigcontext had
the compat code disabled.
[pointed out by thorpej, thanks!]
If we want to remove sigcontext support from userland at least now there
is less work to do so.

branches: 1.7.8;
Remove clause 3 and 4 from TNF licenses

branches: 1.6.18;
make these consistent.

Add missing __RCSID()

save errno while trying to install a !SA_SIGINFO trampoline -- this
is expected to fail with !COMPAT_16 kernels, and we shouldn't
overwrite errno in this case

Add SA_SIGINFO support for ARM.

Merge the nathanw_sa branch.

branches: 1.1.2;
New __sigaction14() system call stub which registers the signal
trampoline, and the signal trampolines themselves.

NOTE: These are not yet enabled; they will be enabled after further
testing on more architectures.

move to the new compat layout.

fix references to the syscall formerly known as SYS___sigreturn14

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22280, verified by myself.

Replace boiler-plate code sequences with macro invocations from SYS.h.

Create shared ARM source for libc, and move arm26 port over to using it.
The code is (almost) a direct copy of the current arm26 sources.
It's identical to the current arm32 sources, with the following exceptions:
- _C_LABEL is used on references to C labels from assembler.
- Function returns in assembler have APCS-26 versions in #ifdef __APCS_26__.
- It uses SoftFloat 2a rather than SoftFloat 1a.

The first two of these should be inconsequential. I believe that SoftFloat 2a
should work on arm32 and be backward-compatible with existing code, but this
is not obviously true. For now, arm32 remains using its own bits of libc.

move to the new compat layout.

fix references to the syscall formerly known as SYS___sigreturn14

branches: 1.1.2;
New __sigaction14() system call stub which registers the signal
trampoline, and the signal trampolines themselves.

NOTE: These are not yet enabled; they will be enabled after further
testing on more architectures.

Trailing whitespace

Decorate the ARM signal trampoline with the appropriate .cfi
directives to allow exception unwind / backtrace across a signal
handler.

Add END

branches: 1.2.4; 1.2.8; 1.2.28;
Remove clause 3 and 4 from TNF licenses

branches: 1.1.30;
Add SA_SIGINFO support for ARM.

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22280, verified by myself.

Replace boiler-plate code sequences with macro invocations from SYS.h.

Use SYSTRAP() everywhere rather than coding SWI instructions directly.

Create shared ARM source for libc, and move arm26 port over to using it.
The code is (almost) a direct copy of the current arm26 sources.
It's identical to the current arm32 sources, with the following exceptions:
- _C_LABEL is used on references to C labels from assembler.
- Function returns in assembler have APCS-26 versions in #ifdef __APCS_26__.
- It uses SoftFloat 2a rather than SoftFloat 1a.

The first two of these should be inconsequential. I believe that SoftFloat 2a
should work on arm32 and be backward-compatible with existing code, but this
is not obviously true. For now, arm32 remains using its own bits of libc.

Use less got, add END(), make thumb tolerant.

Thumbify & optimize a little

CERROR is now hidden so no need to call it via the PLT

branches: 1.7.16; 1.7.50; 1.7.56;
Use RET and RETc for returning.

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22280, verified by myself.

NetBSD/acorn26 has been using APCS-32 for years, so unifdef -U__APCS_26__.

Changes needed for ARM ELF shared library support.

branches: 1.3.2;
Use SYSTRAP() everywhere rather than coding SWI instructions directly.

Add some explanatory comments.

Create shared ARM source for libc, and move arm26 port over to using it.
The code is (almost) a direct copy of the current arm26 sources.
It's identical to the current arm32 sources, with the following exceptions:
- _C_LABEL is used on references to C labels from assembler.
- Function returns in assembler have APCS-26 versions in #ifdef __APCS_26__.
- It uses SoftFloat 2a rather than SoftFloat 1a.

The first two of these should be inconsequential. I believe that SoftFloat 2a
should work on arm32 and be backward-compatible with existing code, but this
is not obviously true. For now, arm32 remains using its own bits of libc.

Pass PICFLAGS down to cc-as-as and use __PIC__ to decide if it is small
vs big PIC mode. Retire -DPIC and -DBIGPIC.

Use less got, add END(), make thumb tolerant.

CERROR is now hidden so no need to call it via the PLT

Make __minbrk, __curbrk, and CERROR hidden and avoid using the GOT to access
them.

branches: 1.9.4; 1.9.10;
Use "_end" instead of "end" for consistency with other architectures.

branches: 1.8.16;
Use RET and RETc for returning.

Use an unsigned comparison against minbrk.
From Steve Woodford, inspired by a similar change to other archs from
OpenBSD.

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22280, verified by myself.

NetBSD/acorn26 has been using APCS-32 for years, so unifdef -U__APCS_26__.

Local label fixup.

Changes needed for ARM ELF shared library support.

branches: 1.2.2;
Use SYSTRAP() everywhere rather than coding SWI instructions directly.

Create shared ARM source for libc, and move arm26 port over to using it.
The code is (almost) a direct copy of the current arm26 sources.
It's identical to the current arm32 sources, with the following exceptions:
- _C_LABEL is used on references to C labels from assembler.
- Function returns in assembler have APCS-26 versions in #ifdef __APCS_26__.
- It uses SoftFloat 2a rather than SoftFloat 1a.

The first two of these should be inconsequential. I believe that SoftFloat 2a
should work on arm32 and be backward-compatible with existing code, but this
is not obviously true. For now, arm32 remains using its own bits of libc.

arm: asm.h - change GOT_INIT to take the normal asm label

Don't pass the label to use for the "current address" as the macro
parameter. It obscures its purpose and makes the use of local labels
extremely unobvious, so you are forced to invent a name that is mostly
useless otherwise:

GOT_INIT(r3, .Lgot.execsp_start, .Lpc.execsp_start)
GOT_INITSYM(.Lgot.execsp_start, .Lpc.execsp_start)
vs.
0: GOT_INIT(r3, .Lgot.execsp_start)
GOT_INITSYM(.Lgot.execsp_start, 0b)

Same object code is generated.

arm: cerror.S - use GOT_SYM

Use GOT_SYM instead of open-coding it. It's defined in asm.h but
doesn't seem to be used anywhere, so perk it up.

While here, be consistent about declaring errno and use that as a
chance to provide a comment why #ifdef _REENTRANT is needed here.

arm: cerror.S - factor out code to return -1

Do not repeat verbose ifdefed code that sets (long long){ r0, r1 } to
-1LL that indicates an error return from a syscall. Define it once as
a macro and use it. Fix the code to actually be compilable as thumb
("mov" vs "movs").

Modulo one fixed "mov" vs "movs" the same object code is generated for
all 8 permutations of (arm/thumb x non/reentrant x absolute/pic).

arm/asm.h: revert PCREL_GET &c in previous (ok riastradh)

This change needs to be redone and re-verified. I have detailed some
issues in the PR, and it also turns out that some of the changes were
in the !_REENTRANT branch of #ifdef and thus not checked at all.
riastradh asked to back out the changes for now.

PR lib/59391: unnecessary __PIC__ conditionals clutter .S files

arm: Nix most __PIC__ conditionals in .S files.

New macros PCREL_GET(rN,label,pclabel) and PCREL_SYM(label,pclabel)
to enable this by the pattern:

ldr rN, label
#ifdef __PIC__
pclabel:
add rN, rN, pc
#endif
...
label:
#ifdef __PIC__
.word (label - (pclabel + 2*sizeof(instruction)))
#else
.word label
#endif

(sizeof(instruction) = 2 for thumb, 4 for non-thumb.)

No binary change in libc with MKPIE=no (i.e., testing both for
changes to the PIC build and changes to the non-PIC build).

In principle, assembly routines could improve instruction scheduling
by splitting up the ldr and add instructions. But in practice, the
maintenance and auditing burden likely makes this worthwhile by
improving legibility vs a tangle of in-line #ifdefs.

brk.S does things a little differently making it harder to unify.
Could redo it but I don't want to make changes without testing them
first.

PR lib/59391: unnecessary __PIC__ conditionals clutter .S files

branches: 1.13.38;
Use PLT_SYM.

Pass PICFLAGS down to cc-as-as and use __PIC__ to decide if it is small
vs big PIC mode. Retire -DPIC and -DBIGPIC.

only emit cfi if __ARM_EABI__ && __UNWIND_TABLES__

Use less got, add END(), make thumb tolerant.

CERROR is now hidden so no need to call it via the PLT

branches: 1.8.2;
Make __cerror protected to restore ABI leak in older libc versions,
where e.g. librt referenced the copy from libc. This still allows libc
to use PC-relative jumps.

branches: 1.7.6; 1.7.8;
Change __cerror to be marked hidden and change callers to avoid the PLT.

branches: 1.6.16;
Use RET and RETc for returning.

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22280, verified by myself.

NetBSD/acorn26 has been using APCS-32 for years, so unifdef -U__APCS_26__.

Local label fixup.

Changes needed for ARM ELF shared library support.

branches: 1.1.2;
Create shared ARM source for libc, and move arm26 port over to using it.
The code is (almost) a direct copy of the current arm26 sources.
It's identical to the current arm32 sources, with the following exceptions:
- _C_LABEL is used on references to C labels from assembler.
- Function returns in assembler have APCS-26 versions in #ifdef __APCS_26__.
- It uses SoftFloat 2a rather than SoftFloat 1a.

The first two of these should be inconsequential. I believe that SoftFloat 2a
should work on arm32 and be backward-compatible with existing code, but this
is not obviously true. For now, arm32 remains using its own bits of libc.

Mark exect(3) obsolete and bind it to plain execve(2) on all platforms

The original exect(2) from BSD4.2 was enabling bit for tracing
(single-step mode) and calling execve(2). The purpose of it was to generate
a signal for a tracer once the application will change its image to a new
program.

This approach no longer works as:
- exect(2) traces (single-steps) libc and it requires hundreds or
thousands steps before entering a new image
- it's vax and x86 specific code
- this functionality has been moved to the kernel - once a process is
traced it will generate SIGTRAP with si_code TRAP_EXEC and route it to
its debugger
- the side effects and unportability make this interface unusable
- there are no known users of this interface
- it apparently never worked better since day0 of NetBSD ("day0 bug")

Users are requested to move to other execve(2) variants. Calling current
execve(2) as it is the most similar behavior to this one from BSD4.2.

Discussed several times on mailing lists and in PR/51700.

Add warning to exect(3) telling about marking this function obsolete.

This function is prepared to be removed in next libc major bump.

Sponsored by <The NetBSD Foundation>

branches: 1.4.80; 1.4.84;
Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22280, verified by myself.

Replace boiler-plate code sequences with macro invocations from SYS.h.

Use SYSTRAP() everywhere rather than coding SWI instructions directly.

Create shared ARM source for libc, and move arm26 port over to using it.
The code is (almost) a direct copy of the current arm26 sources.
It's identical to the current arm32 sources, with the following exceptions:
- _C_LABEL is used on references to C labels from assembler.
- Function returns in assembler have APCS-26 versions in #ifdef __APCS_26__.
- It uses SoftFloat 2a rather than SoftFloat 1a.

The first two of these should be inconsequential. I believe that SoftFloat 2a
should work on arm32 and be backward-compatible with existing code, but this
is not obviously true. For now, arm32 remains using its own bits of libc.

thumbify and add END

branches: 1.6.50; 1.6.56;
Use RET and RETc for returning.

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22280, verified by myself.

NetBSD/acorn26 has been using APCS-32 for years, so unifdef -U__APCS_26__.

Implement pthread_atfork() (in libc, because the required threadlib
stub behavior is exactly the same as the usual behavior).

Add some explanatory comments.

Create shared ARM source for libc, and move arm26 port over to using it.
The code is (almost) a direct copy of the current arm26 sources.
It's identical to the current arm32 sources, with the following exceptions:
- _C_LABEL is used on references to C labels from assembler.
- Function returns in assembler have APCS-26 versions in #ifdef __APCS_26__.
- It uses SoftFloat 2a rather than SoftFloat 1a.

The first two of these should be inconsequential. I believe that SoftFloat 2a
should work on arm32 and be backward-compatible with existing code, but this
is not obviously true. For now, arm32 remains using its own bits of libc.

Use less got, add END(), make thumb tolerant.

CERROR is now hidden so no need to call it via the PLT

include assym.h

Don't hardcode offset in assembler. This ensures the return value in the
context is the correct value (0) on earm*

branches: 1.6.4; 1.6.8; 1.6.28;
Remove clause 3 and 4 from TNF licenses

branches: 1.5.2;
Use SYSTRAP macro, rather than inlining the swi instruction.

This makes sure the SWI will be in the NetBSD assigned range of swi
numbers.

branches: 1.4.16;
Use RET and RETc for returning.

NetBSD/acorn26 has been using APCS-32 for years, so unifdef -U__APCS_26__.

Merge the nathanw_sa branch.

branches: 1.1.2;
file getcontext.S was initially added on branch nathanw_sa.

move to the new compat layout.

Create shared ARM source for libc, and move arm26 port over to using it.
The code is (almost) a direct copy of the current arm26 sources.
It's identical to the current arm32 sources, with the following exceptions:
- _C_LABEL is used on references to C labels from assembler.
- Function returns in assembler have APCS-26 versions in #ifdef __APCS_26__.
- It uses SoftFloat 2a rather than SoftFloat 1a.

The first two of these should be inconsequential. I believe that SoftFloat 2a
should work on arm32 and be backward-compatible with existing code, but this
is not obviously true. For now, arm32 remains using its own bits of libc.

Use _INVOKE_CERROR
use stmia instead of two str
add END

CERROR is now hidden so no need to call it via the PLT

branches: 1.6.16; 1.6.50; 1.6.56;
Use RET and RETc for returning.

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22280, verified by myself.

NetBSD/acorn26 has been using APCS-32 for years, so unifdef -U__APCS_26__.

Changes needed for ARM ELF shared library support.

branches: 1.2.2;
Use SYSTRAP() everywhere rather than coding SWI instructions directly.

Create shared ARM source for libc, and move arm26 port over to using it.
The code is (almost) a direct copy of the current arm26 sources.
It's identical to the current arm32 sources, with the following exceptions:
- _C_LABEL is used on references to C labels from assembler.
- Function returns in assembler have APCS-26 versions in #ifdef __APCS_26__.
- It uses SoftFloat 2a rather than SoftFloat 1a.

The first two of these should be inconsequential. I believe that SoftFloat 2a
should work on arm32 and be backward-compatible with existing code, but this
is not obviously true. For now, arm32 remains using its own bits of libc.

arm/asm.h: revert PCREL_GET &c in previous (ok riastradh)

This change needs to be redone and re-verified. I have detailed some
issues in the PR, and it also turns out that some of the changes were
in the !_REENTRANT branch of #ifdef and thus not checked at all.
riastradh asked to back out the changes for now.

PR lib/59391: unnecessary __PIC__ conditionals clutter .S files

arm: Nix most __PIC__ conditionals in .S files.

New macros PCREL_GET(rN,label,pclabel) and PCREL_SYM(label,pclabel)
to enable this by the pattern:

ldr rN, label
#ifdef __PIC__
pclabel:
add rN, rN, pc
#endif
...
label:
#ifdef __PIC__
.word (label - (pclabel + 2*sizeof(instruction)))
#else
.word label
#endif

(sizeof(instruction) = 2 for thumb, 4 for non-thumb.)

No binary change in libc with MKPIE=no (i.e., testing both for
changes to the PIC build and changes to the non-PIC build).

In principle, assembly routines could improve instruction scheduling
by splitting up the ldr and add instructions. But in practice, the
maintenance and auditing burden likely makes this worthwhile by
improving legibility vs a tangle of in-line #ifdefs.

brk.S does things a little differently making it harder to unify.
Could redo it but I don't want to make changes without testing them
first.

PR lib/59391: unnecessary __PIC__ conditionals clutter .S files

branches: 1.12.38;
Use PLT_SYM.

Pass PICFLAGS down to cc-as-as and use __PIC__ to decide if it is small
vs big PIC mode. Retire -DPIC and -DBIGPIC.

Use less got, add END(), make thumb tolerant.

CERROR is now hidden so no need to call it via the PLT

branches: 1.8.16; 1.8.50; 1.8.56;
Use RET and RETc for returning.

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22280, verified by myself.

NetBSD/acorn26 has been using APCS-32 for years, so unifdef -U__APCS_26__.

Local label fixup.

Update arm libc files for 8 byte aligned stack.

Changes needed for ARM ELF shared library support.

branches: 1.2.2;
Use SYSTRAP() everywhere rather than coding SWI instructions directly.

Create shared ARM source for libc, and move arm26 port over to using it.
The code is (almost) a direct copy of the current arm26 sources.
It's identical to the current arm32 sources, with the following exceptions:
- _C_LABEL is used on references to C labels from assembler.
- Function returns in assembler have APCS-26 versions in #ifdef __APCS_26__.
- It uses SoftFloat 2a rather than SoftFloat 1a.

The first two of these should be inconsequential. I believe that SoftFloat 2a
should work on arm32 and be backward-compatible with existing code, but this
is not obviously true. For now, arm32 remains using its own bits of libc.

arm/asm.h: revert PCREL_GET &c in previous (ok riastradh)

This change needs to be redone and re-verified. I have detailed some
issues in the PR, and it also turns out that some of the changes were
in the !_REENTRANT branch of #ifdef and thus not checked at all.
riastradh asked to back out the changes for now.

PR lib/59391: unnecessary __PIC__ conditionals clutter .S files

arm: Nix most __PIC__ conditionals in .S files.

New macros PCREL_GET(rN,label,pclabel) and PCREL_SYM(label,pclabel)
to enable this by the pattern:

ldr rN, label
#ifdef __PIC__
pclabel:
add rN, rN, pc
#endif
...
label:
#ifdef __PIC__
.word (label - (pclabel + 2*sizeof(instruction)))
#else
.word label
#endif

(sizeof(instruction) = 2 for thumb, 4 for non-thumb.)

No binary change in libc with MKPIE=no (i.e., testing both for
changes to the PIC build and changes to the non-PIC build).

In principle, assembly routines could improve instruction scheduling
by splitting up the ldr and add instructions. But in practice, the
maintenance and auditing burden likely makes this worthwhile by
improving legibility vs a tangle of in-line #ifdefs.

brk.S does things a little differently making it harder to unify.
Could redo it but I don't want to make changes without testing them
first.

PR lib/59391: unnecessary __PIC__ conditionals clutter .S files

branches: 1.12.38;
Pass PICFLAGS down to cc-as-as and use __PIC__ to decide if it is small
vs big PIC mode. Retire -DPIC and -DBIGPIC.

Use less got, add END(), make thumb tolerant.

Make __minbrk, __curbrk, and CERROR hidden and avoid using the GOT to access
them.

branches: 1.9.4; 1.9.10;
Use "_end" instead of "end" for consistency with other architectures.

branches: 1.8.16;
Use RET and RETc for returning.

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22280, verified by myself.

NetBSD/acorn26 has been using APCS-32 for years, so unifdef -U__APCS_26__.

Local label fixup.

Changes needed for ARM ELF shared library support.

Shameless hack to reference end when using a.out and _end when using ELF.

branches: 1.2.2;
Use SYSTRAP() everywhere rather than coding SWI instructions directly.

Create shared ARM source for libc, and move arm26 port over to using it.
The code is (almost) a direct copy of the current arm26 sources.
It's identical to the current arm32 sources, with the following exceptions:
- _C_LABEL is used on references to C labels from assembler.
- Function returns in assembler have APCS-26 versions in #ifdef __APCS_26__.
- It uses SoftFloat 2a rather than SoftFloat 1a.

The first two of these should be inconsequential. I believe that SoftFloat 2a
should work on arm32 and be backward-compatible with existing code, but this
is not obviously true. For now, arm32 remains using its own bits of libc.

Merge the nathanw_sa branch.

Local label fixup.

Changes needed for ARM ELF shared library support.

branches: 1.1.2;
Create shared ARM source for libc, and move arm26 port over to using it.
The code is (almost) a direct copy of the current arm26 sources.
It's identical to the current arm32 sources, with the following exceptions:
- _C_LABEL is used on references to C labels from assembler.
- Function returns in assembler have APCS-26 versions in #ifdef __APCS_26__.
- It uses SoftFloat 2a rather than SoftFloat 1a.

The first two of these should be inconsequential. I believe that SoftFloat 2a
should work on arm32 and be backward-compatible with existing code, but this
is not obviously true. For now, arm32 remains using its own bits of libc.

Create shared ARM source for libc, and move arm26 port over to using it.
The code is (almost) a direct copy of the current arm26 sources.
It's identical to the current arm32 sources, with the following exceptions:
- _C_LABEL is used on references to C labels from assembler.
- Function returns in assembler have APCS-26 versions in #ifdef __APCS_26__.
- It uses SoftFloat 2a rather than SoftFloat 1a.

The first two of these should be inconsequential. I believe that SoftFloat 2a
should work on arm32 and be backward-compatible with existing code, but this
is not obviously true. For now, arm32 remains using its own bits of libc.

move to the new compat layout.

Create shared ARM source for libc, and move arm26 port over to using it.
The code is (almost) a direct copy of the current arm26 sources.
It's identical to the current arm32 sources, with the following exceptions:
- _C_LABEL is used on references to C labels from assembler.
- Function returns in assembler have APCS-26 versions in #ifdef __APCS_26__.
- It uses SoftFloat 2a rather than SoftFloat 1a.

The first two of these should be inconsequential. I believe that SoftFloat 2a
should work on arm32 and be backward-compatible with existing code, but this
is not obviously true. For now, arm32 remains using its own bits of libc.

move to the new compat layout.

Create shared ARM source for libc, and move arm26 port over to using it.
The code is (almost) a direct copy of the current arm26 sources.
It's identical to the current arm32 sources, with the following exceptions:
- _C_LABEL is used on references to C labels from assembler.
- Function returns in assembler have APCS-26 versions in #ifdef __APCS_26__.
- It uses SoftFloat 2a rather than SoftFloat 1a.

The first two of these should be inconsequential. I believe that SoftFloat 2a
should work on arm32 and be backward-compatible with existing code, but this
is not obviously true. For now, arm32 remains using its own bits of libc.

move to the new compat layout.

Use RET and RETc for returning.

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22280, verified by myself.

NetBSD/acorn26 has been using APCS-32 for years, so unifdef -U__APCS_26__.

Changes needed for ARM ELF shared library support.

branches: 1.2.2;
Use SYSTRAP() everywhere rather than coding SWI instructions directly.

Create shared ARM source for libc, and move arm26 port over to using it.
The code is (almost) a direct copy of the current arm26 sources.
It's identical to the current arm32 sources, with the following exceptions:
- _C_LABEL is used on references to C labels from assembler.
- Function returns in assembler have APCS-26 versions in #ifdef __APCS_26__.
- It uses SoftFloat 2a rather than SoftFloat 1a.

The first two of these should be inconsequential. I believe that SoftFloat 2a
should work on arm32 and be backward-compatible with existing code, but this
is not obviously true. For now, arm32 remains using its own bits of libc.

move to the new compat layout.

Use RET and RETc for returning.

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22280, verified by myself.

NetBSD/acorn26 has been using APCS-32 for years, so unifdef -U__APCS_26__.

Changes needed for ARM ELF shared library support.

branches: 1.2.2;
Use SYSTRAP() everywhere rather than coding SWI instructions directly.

Create shared ARM source for libc, and move arm26 port over to using it.
The code is (almost) a direct copy of the current arm26 sources.
It's identical to the current arm32 sources, with the following exceptions:
- _C_LABEL is used on references to C labels from assembler.
- Function returns in assembler have APCS-26 versions in #ifdef __APCS_26__.
- It uses SoftFloat 2a rather than SoftFloat 1a.

The first two of these should be inconsequential. I believe that SoftFloat 2a
should work on arm32 and be backward-compatible with existing code, but this
is not obviously true. For now, arm32 remains using its own bits of libc.

move to the new compat layout.

the WARN_REFERENCES text "include <signal.h> for correct reference" is pointless
as <signal.h> won't help you, so remove it

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22280, verified by myself.

Create shared ARM source for libc, and move arm26 port over to using it.
The code is (almost) a direct copy of the current arm26 sources.
It's identical to the current arm32 sources, with the following exceptions:
- _C_LABEL is used on references to C labels from assembler.
- Function returns in assembler have APCS-26 versions in #ifdef __APCS_26__.
- It uses SoftFloat 2a rather than SoftFloat 1a.

The first two of these should be inconsequential. I believe that SoftFloat 2a
should work on arm32 and be backward-compatible with existing code, but this
is not obviously true. For now, arm32 remains using its own bits of libc.

move to the new compat layout.

Use RET and RETc for returning.

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22280, verified by myself.

Use the correct instruction for returning ffrom a function (MOV rather
than MOVS).

NetBSD/acorn26 has been using APCS-32 for years, so unifdef -U__APCS_26__.

Changes needed for ARM ELF shared library support.

branches: 1.2.2;
Use SYSTRAP() everywhere rather than coding SWI instructions directly.

Create shared ARM source for libc, and move arm26 port over to using it.
The code is (almost) a direct copy of the current arm26 sources.
It's identical to the current arm32 sources, with the following exceptions:
- _C_LABEL is used on references to C labels from assembler.
- Function returns in assembler have APCS-26 versions in #ifdef __APCS_26__.
- It uses SoftFloat 2a rather than SoftFloat 1a.

The first two of these should be inconsequential. I believe that SoftFloat 2a
should work on arm32 and be backward-compatible with existing code, but this
is not obviously true. For now, arm32 remains using its own bits of libc.

Rename "syscall" to "_syscall" and provide "syscall" as a weak alias.

branches: 1.4.98;
Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22280, verified by myself.

Replace boiler-plate code sequences with macro invocations from SYS.h.

Use SYSTRAP() everywhere rather than coding SWI instructions directly.

Create shared ARM source for libc, and move arm26 port over to using it.
The code is (almost) a direct copy of the current arm26 sources.
It's identical to the current arm32 sources, with the following exceptions:
- _C_LABEL is used on references to C labels from assembler.
- Function returns in assembler have APCS-26 versions in #ifdef __APCS_26__.
- It uses SoftFloat 2a rather than SoftFloat 1a.

The first two of these should be inconsequential. I believe that SoftFloat 2a
should work on arm32 and be backward-compatible with existing code, but this
is not obviously true. For now, arm32 remains using its own bits of libc.