Remove $FreeBSD$: two-line .h pattern

Remove /^\s*\*\n \*\s+\$FreeBSD\$$\n/

Add CFI start/end proc directives to arm64, i386, and ppc

Follow-up to r353959 and r368070: do the same for other architectures.

arm32 already seems to use its own .fnstart/.fnend directives, which

Add CFI start/end proc directives to arm64, i386, and ppc

Follow-up to r353959 and r368070: do the same for other architectures.

arm32 already seems to use its own .fnstart/.fnend directives, which
appear to be ARM-specific variants of the same thing. Likewise, MIPS
uses .frame directives.

Reviewed by: arichardson
Differential Revision: https://reviews.freebsd.org/D27387

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[PowerPC] Fix stack padding issue on ppc32.

Four bytes of padding are needed in the regular powerpc case to bring the
stack frame size up to a multiple of 16 bytes to meet ABI requirements.

Fixes o

[PowerPC] Fix stack padding issue on ppc32.

Four bytes of padding are needed in the regular powerpc case to bring the
stack frame size up to a multiple of 16 bytes to meet ABI requirements.

Fixes odd hangs I was encountering during testing.

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rtld/powerpc: Fix _rtld_bind_start for powerpcspe

Summary:
We need to save off the full 64-bit register, not just the low 32 bits,
of all registers getting saved off in _rtld_bind_start. Additional

rtld/powerpc: Fix _rtld_bind_start for powerpcspe

Summary:
We need to save off the full 64-bit register, not just the low 32 bits,
of all registers getting saved off in _rtld_bind_start. Additionally,
we need to save off the other SPE registers (SPEFSCR and accumulator),
so that their program state is not affected by the PLT resolver.

Reviewed by: bdragon
Differential Revision: https://reviews.freebsd.org/D22520

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MFHead @349476

Sponsored by: The FreeBSD Foundation

powerpc: Transition to Secure-PLT, like most other OSs

Summary:
PowerPC has two PLT models: BSS-PLT and Secure-PLT. BSS-PLT uses runtime
code generation to generate the PLT stubs. Secure-PLT was i

powerpc: Transition to Secure-PLT, like most other OSs

Summary:
PowerPC has two PLT models: BSS-PLT and Secure-PLT. BSS-PLT uses runtime
code generation to generate the PLT stubs. Secure-PLT was introduced with
GCC 4.1 and Binutils 2.17 (base has GCC 4.2.1 and Binutils 2.17), and is a
more secure PLT format, using a read-only linkage table, with the dynamic
linker populating a non-executable index table.

This is the libc, rtld, and kernel support only. The toolchain and build
parts will be updated separately.

Reviewed By: nwhitehorn, bdragon, pfg
Differential Revision: https://reviews.freebsd.org/D20598
MFC after: 1 month

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Mark rtld on PowerPC as not requiring executable stack.

Reviewed and tested by: nwhitehorn

MFC r204211:

Support the extended PLT format used when objects have more than 8192
PLT relocations on PPC32.

IFH@204581

Support the extended PLT format used when objects have more than 8192
PLT relocations on PPC32.

Allow threading libraries to register their own locking
implementation in case default one provided by rtld is
not suitable.

Consolidate various identical MD lock implementation into
a single file u

Allow threading libraries to register their own locking
implementation in case default one provided by rtld is
not suitable.

Consolidate various identical MD lock implementation into
a single file using appropriate machine/atomic.h.

Approved by: re (scottl)

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rtld support for PowerPC. Mostly obtained from NetBSD, with mods
for binutils 2.13

Reviewed by: benno

Approved by: re (blanket)

Support the extended PLT format used when objects have more than 8192
PLT relocations on PPC32.

Allow threading libraries to register their own locking
implementation in case default one provided by rtld is
not suitable.

Consolidate various identical MD lock implementation into
a single file u

Allow threading libraries to register their own locking
implementation in case default one provided by rtld is
not suitable.

Consolidate various identical MD lock implementation into
a single file using appropriate machine/atomic.h.

Approved by: re (scottl)

show more ...

rtld support for PowerPC. Mostly obtained from NetBSD, with mods
for binutils 2.13

Reviewed by: benno

Approved by: re (blanket)