Populate the non-LOAD openbsd.syscalls section (and PT_OPENBSD_SYSCALL)
with {uint offset, uint syscall#} entries in libc & ld.so.
In libc a few syscall# entries (break, sigprocmask, _tfork, _threxit)
are duplicated because additional or inline uses occur (that situation
is handled elsewhere)
ok kettenis

Geode CPU does not support SSE, so MXCSR does not exists there. As
our i386 compiler does not generate SSE instructions by default,
it is not strictly necessary to save MXCSR content between setjmp(3)
and longjmp(3). We do not want to end supporting such old processors
now. Remove the stmxcsr and ldmxcsr instructions from libc.
reported by Johan Huldtgren; OK jsg@ kettenis@

On i386 setjmp(3) should store the FPU state and longjmp(3) restore
it. There is enough space in jmp_buf to save MXCSR and CW register.
Idea taken from amd64. This fixes regress/lib/libc/setjmp-fpu .
OK kettenis@

Introduce constants to access the setjmp(3) jmp_buf fields from
i386 libc. The assembler code is more readable than with magic
numbers. This brings i386 in line with amd64. No change in object
file.
OK kettenis@

Do setjmp cookies for eip, esp, and ebp. For bonus points, mix how
the cookies are used in setjmp/_setjmp/sigsetjmp so that mixing
calls (e.g., longjmp on a _setjmp buffer) will scramble all three
registers and jump you to a random location on a random stack!

ok deraadt@

Do provide hidden _libc_* aliases for sig{block,setmask} and use them in
the ASM *setjmp implementations.
Skip the PLT when calling them on amd64 (other archs to do this after testing)

ok miod@

Convert cpp | as rules in bsd.lib.mk and lib/libc/sys/Makefile.inc to pure cc
invocations. This allows us to use the compiler builtin define __PIC__ to check
for PIC/PIEness rather than passing -DPIC. Simplifies PIE work a lot.

ok matthew@, conceptually ok kurt@

zap rcsid, tested there. okay deraadt@

Fix typo in comment (_setjmp -> setjmp)

ok deraadt

Remove the advertising clause in the UCB license which Berkeley
rescinded 22 July 1999. Proofed by myself and Theo.

ELF fixups, ELF PIC syscall support, asm changes as requested by assembler.

use _C_LABEL

Fix RCS ids
Make sure everything uses {SYS,}LIBC_SCCS properly

from netbsd:
Remove #include "SYS.h"; it is not needed (by normal assembly functions)

branches: 1.1.1;
Initial revision

Geode CPU does not support SSE, so MXCSR does not exists there. As
our i386 compiler does not generate SSE instructions by default,
it is not strictly necessary to save MXCSR content between setjmp(3)
and longjmp(3). We do not want to end supporting such old processors
now. Remove the stmxcsr and ldmxcsr instructions from libc.
reported by Johan Huldtgren; OK jsg@ kettenis@

On i386 setjmp(3) should store the FPU state and longjmp(3) restore
it. There is enough space in jmp_buf to save MXCSR and CW register.
Idea taken from amd64. This fixes regress/lib/libc/setjmp-fpu .
OK kettenis@

Introduce constants to access the setjmp(3) jmp_buf fields from
i386 libc. The assembler code is more readable than with magic
numbers. This brings i386 in line with amd64. No change in object
file.
OK kettenis@

Do setjmp cookies for eip, esp, and ebp. For bonus points, mix how
the cookies are used in setjmp/_setjmp/sigsetjmp so that mixing
calls (e.g., longjmp on a _setjmp buffer) will scramble all three
registers and jump you to a random location on a random stack!

ok deraadt@

Do provide hidden _libc_* aliases for sig{block,setmask} and use them in
the ASM *setjmp implementations.
Skip the PLT when calling them on amd64 (other archs to do this after testing)

ok miod@

Convert cpp | as rules in bsd.lib.mk and lib/libc/sys/Makefile.inc to pure cc
invocations. This allows us to use the compiler builtin define __PIC__ to check
for PIC/PIEness rather than passing -DPIC. Simplifies PIE work a lot.

ok matthew@, conceptually ok kurt@

zap rcsid, tested there. okay deraadt@

Fix typo in comment (_setjmp -> setjmp)

ok deraadt

Remove the advertising clause in the UCB license which Berkeley
rescinded 22 July 1999. Proofed by myself and Theo.

ELF fixups, ELF PIC syscall support, asm changes as requested by assembler.

use _C_LABEL

Fix RCS ids
Make sure everything uses {SYS,}LIBC_SCCS properly

from netbsd:
Remove #include "SYS.h"; it is not needed (by normal assembly functions)

branches: 1.1.1;
Initial revision

On i386 setjmp(3) should store the FPU state and longjmp(3) restore
it. There is enough space in jmp_buf to save MXCSR and CW register.
Idea taken from amd64. This fixes regress/lib/libc/setjmp-fpu .
OK kettenis@

Introduce constants to access the setjmp(3) jmp_buf fields from
i386 libc. The assembler code is more readable than with magic
numbers. This brings i386 in line with amd64. No change in object
file.
OK kettenis@

Do setjmp cookies for eip, esp, and ebp. For bonus points, mix how
the cookies are used in setjmp/_setjmp/sigsetjmp so that mixing
calls (e.g., longjmp on a _setjmp buffer) will scramble all three
registers and jump you to a random location on a random stack!

ok deraadt@

Do provide hidden _libc_* aliases for sig{block,setmask} and use them in
the ASM *setjmp implementations.
Skip the PLT when calling them on amd64 (other archs to do this after testing)

ok miod@

Convert cpp | as rules in bsd.lib.mk and lib/libc/sys/Makefile.inc to pure cc
invocations. This allows us to use the compiler builtin define __PIC__ to check
for PIC/PIEness rather than passing -DPIC. Simplifies PIE work a lot.

ok matthew@, conceptually ok kurt@

zap rcsid, tested there. okay deraadt@

Fix typo in comment (_setjmp -> setjmp)

ok deraadt

Remove the advertising clause in the UCB license which Berkeley
rescinded 22 July 1999. Proofed by myself and Theo.

ELF fixups, ELF PIC syscall support, asm changes as requested by assembler.

use _C_LABEL

Fix RCS ids
Make sure everything uses {SYS,}LIBC_SCCS properly

from netbsd:
Remove #include "SYS.h"; it is not needed (by normal assembly functions)

branches: 1.1.1;
Initial revision

Do setjmp cookies for eip, esp, and ebp. For bonus points, mix how
the cookies are used in setjmp/_setjmp/sigsetjmp so that mixing
calls (e.g., longjmp on a _setjmp buffer) will scramble all three
registers and jump you to a random location on a random stack!

ok deraadt@

Do provide hidden _libc_* aliases for sig{block,setmask} and use them in
the ASM *setjmp implementations.
Skip the PLT when calling them on amd64 (other archs to do this after testing)

ok miod@

Convert cpp | as rules in bsd.lib.mk and lib/libc/sys/Makefile.inc to pure cc
invocations. This allows us to use the compiler builtin define __PIC__ to check
for PIC/PIEness rather than passing -DPIC. Simplifies PIE work a lot.

ok matthew@, conceptually ok kurt@

zap rcsid, tested there. okay deraadt@

Fix typo in comment (_setjmp -> setjmp)

ok deraadt

Remove the advertising clause in the UCB license which Berkeley
rescinded 22 July 1999. Proofed by myself and Theo.

ELF fixups, ELF PIC syscall support, asm changes as requested by assembler.

use _C_LABEL

Fix RCS ids
Make sure everything uses {SYS,}LIBC_SCCS properly

from netbsd:
Remove #include "SYS.h"; it is not needed (by normal assembly functions)

branches: 1.1.1;
Initial revision