remove files moved to the new compat layout.

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

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

Use the syscall insn for system calls. Fix up some assembly to
remove either previously made errors, or to account for the
fact that syscall clobbers %ecx.

Initial commit of x86-64 specific parts of libc.

PR/58748: Use '_SYSCALL_ERR' instead of 'jmp CERROR' for the hand-crafted
system calls (the regular system calls do this already). This is a noop
for amd64 and it is done for cosmetic reasons, but for i386 it produces
correct pic code.

libc/x86_64: Omit needless __PIC__ conditionals.

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

branches: 1.5.36;
Put missing END() markers to set ELF symbol size.

branches: 1.4.2;
Pass PICFLAGS down to cc-as-as and use __PIC__ to decide if it is small
vs big PIC mode. Retire -DPIC and -DBIGPIC.

branches: 1.3.6;
Exploit hidden __cerror

branches: 1.2.56;
Fix the EINVAL return path.

Add clone(2) implementation.

remove files moved to the new compat layout.

Initial commit of x86-64 specific parts 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.

Whitespace.

branches: 1.10.8; 1.10.28; 1.10.40;
Remove clause 3 and 4 from TNF licenses

branches: 1.9.18;
make these consistent.

Add missing __RCSID()

kill sigcontext passing to signal handlers, we don't have to worry
about compatibility

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

Need a couple more headers for the last change.

Sync with the i386 version.

Userland amd64 siginfo support.

Add ucontext glue for x86_64.

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.

remove files moved to the new compat layout.

disembowel -- there is no kernel support anyway

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

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

Initial commit of x86-64 specific parts of libc.

kill sigcontext passing to signal handlers, we don't have to worry
about compatibility

No need to use movq for the small immediate values here, they'll be
zero-extended with movl.

The fast syscall path clobbers 2 registers. Which is fine for a plain
system call, as long as the stub knows about it. However, it's bad
for sigreturn. Hence, use the old entry point for sigreturn. XXX

Remove fs and gs kludge.

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.

Restore RSP from mcontext

Fixes unwinding of multiple frames without base pointer.

Patch by: Nikhil Benesch via PR lib/55719

Decorate the x86_64 signal trampoline with CFI attributes easing unwinding

Combine the approach provided by Nikhil Benesch and Andrew Cagney.

Now, the unwinders (in gccgo, backtrace(3), etc) can unwind properly
the stack from a signal handler.

Fixes lib/55719 by Nikhil Benesch

Add cfi annotations so that gdb can unwind the stack through signal handlers.

branches: 1.6.24;
Put missing END() markers to set ELF symbol size.

branches: 1.5.48; 1.5.60;
if setcontext(2) returns, _exit(2) with a return code of -1 instead
of relying on a sensible return value

replace the last occurence of an "int 0x80" syscall

Use the int 0x80 path for context system calls.

Get ucontext pointer back out of callee-saved register %r15.

Userland amd64 siginfo support.

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

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

Initial commit of x86-64 specific parts of libc.

PR/58748: Use '_SYSCALL_ERR' instead of 'jmp CERROR' for the hand-crafted
system calls (the regular system calls do this already). This is a noop
for amd64 and it is done for cosmetic reasons, but for i386 it produces
correct pic code.

Put missing END() markers to set ELF symbol size.

branches: 1.4.6; 1.4.16;
Exploit hidden __cerror

branches: 1.3.56;
Move UCB-licensed code from 4-clause to 3-clause licence.

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

Use the syscall insn for system calls. Fix up some assembly to
remove either previously made errors, or to account for the
fact that syscall clobbers %ecx.

Initial commit of x86-64 specific parts of libc.

PR/58748: Use '_SYSCALL_ERR' instead of 'jmp CERROR' for the hand-crafted
system calls (the regular system calls do this already). This is a noop
for amd64 and it is done for cosmetic reasons, but for i386 it produces
correct pic code.

Put missing END() markers to set ELF symbol size.

branches: 1.5.2;
Pass PICFLAGS down to cc-as-as and use __PIC__ to decide if it is small
vs big PIC mode. Retire -DPIC and -DBIGPIC.

branches: 1.4.6;
Exploit hidden __cerror

branches: 1.3.56;
Move UCB-licensed code from 4-clause to 3-clause licence.

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

Use the syscall insn for system calls. Fix up some assembly to
remove either previously made errors, or to account for the
fact that syscall clobbers %ecx.

Initial commit of x86-64 specific parts of libc.

libc/x86_64: Omit needless __PIC__ conditionals.

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

branches: 1.7.36;
Put missing END() markers to set ELF symbol size.

branches: 1.6.2;
Pass PICFLAGS down to cc-as-as and use __PIC__ to decide if it is small
vs big PIC mode. Retire -DPIC and -DBIGPIC.

branches: 1.5.2;
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: 1.4.2;
Explicitly mark __cerror as hidden

branches: 1.3.56;
Move UCB-licensed code from 4-clause to 3-clause licence.

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

Use the syscall insn for system calls. Fix up some assembly to
remove either previously made errors, or to account for the
fact that syscall clobbers %ecx.

Initial commit of x86-64 specific parts 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: 1.4.6; 1.4.10;
Put missing END() markers to set ELF symbol size.

branches: 1.3.6; 1.3.16;
Exploit hidden __cerror

branches: 1.2.56;
Move UCB-licensed code from 4-clause to 3-clause licence.

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

Initial commit of x86-64 specific parts of libc.

Put missing END() markers to set ELF symbol size.

branches: 1.3.62; 1.3.74;
Move UCB-licensed code from 4-clause to 3-clause licence.

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

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

Initial commit of x86-64 specific parts of libc.

Put missing END() markers to set ELF symbol size.

branches: 1.3.62; 1.3.74;
Really, there is no need to use the old int0x80 syscall entry just for
getcontext(). There are some registers not properly saved with the
new syscall entry, but these are calee-saved, scratch or meaningless.
It's the setcontext() return path what matters.

Use the int 0x80 path for context system calls.

Add ucontext glue for x86_64.

remove files moved to the new compat layout.

Initial commit of x86-64 specific parts of libc.

Put missing END() markers to set ELF symbol size.

branches: 1.2.62; 1.2.74;
Move UCB-licensed code from 4-clause to 3-clause licence.

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

Initial commit of x86-64 specific parts of libc.

PR/58748: Use '_SYSCALL_ERR' instead of 'jmp CERROR' for the hand-crafted
system calls (the regular system calls do this already). This is a noop
for amd64 and it is done for cosmetic reasons, but for i386 it produces
correct pic code.

libc/x86_64: Omit needless __PIC__ conditionals.

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

branches: 1.7.28;
Save and restore all the registers we need instead of playing tricks and
"knowing" which registers the compiler clobbers. gcc-5.3 clobbers both
rcx and rdx...

Fix ptrace %rcx corruption when pthread_errno() is used. Small example:
#include <sys/types.h>
#include <stdio.h>
#include <sys/ptrace.h>
int main(void) { ptrace(18, getpid(), NULL, 0xabcd); }
The -lpthread cases pases 0 instead of 0xabcd

branches: 1.5.2;
Put missing END() markers to set ELF symbol size.

branches: 1.4.2;
Pass PICFLAGS down to cc-as-as and use __PIC__ to decide if it is small
vs big PIC mode. Retire -DPIC and -DBIGPIC.

branches: 1.3.6;
Exploit hidden __cerror

branches: 1.2.56;
Move UCB-licensed code from 4-clause to 3-clause licence.

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

Initial commit of x86-64 specific parts of libc.

PR/58748: Use '_SYSCALL_ERR' instead of 'jmp CERROR' for the hand-crafted
system calls (the regular system calls do this already). This is a noop
for amd64 and it is done for cosmetic reasons, but for i386 it produces
correct pic code.

Put missing END() markers to set ELF symbol size.

branches: 1.5.2;
Pass PICFLAGS down to cc-as-as and use __PIC__ to decide if it is small
vs big PIC mode. Retire -DPIC and -DBIGPIC.

branches: 1.4.6;
Exploit hidden __cerror

branches: 1.3.2; 1.3.6;
Avoid calling a syscall when argument to sbrk(2) is zero.
OK by <ad>.

branches: 1.2.32;
Move UCB-licensed code from 4-clause to 3-clause licence.

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

Initial commit of x86-64 specific parts of libc.

These files are obsolete; setlogin() is now implemented in C with a
small syscall stub.

Initial commit of x86-64 specific parts of libc.

Initial commit of x86-64 specific parts of libc.

remove files moved to the new compat layout.

Initial commit of x86-64 specific parts of libc.

remove files moved to the new compat layout.

Initial commit of x86-64 specific parts of libc.

remove files moved to the new compat layout.

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

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

Initial commit of x86-64 specific parts of libc.

remove files moved to the new compat layout.

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

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

Initial commit of x86-64 specific parts of libc.

remove files moved to the new compat layout.

disembowel -- there is no kernel support anyway

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

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

Initial commit of x86-64 specific parts of libc.

remove files moved to the new compat layout.

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

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

Initial commit of x86-64 specific parts of libc.

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

branches: 1.4.72;
syscall() has to be implemented in the kernel - so is a normal system call here.This has always been broken, so I suspect everything is using __syscall().

branches: 1.3.22;
Move UCB-licensed code from 4-clause to 3-clause licence.

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

Use the syscall insn for system calls. Fix up some assembly to
remove either previously made errors, or to account for the
fact that syscall clobbers %ecx.

Initial commit of x86-64 specific parts of libc.