Gcc used to create code to create trampolines (for nested functions) for
m68k without properly flushing the caches, leading to segmentation violations
on 68040/68060 systems.
Fixed by:
- importing the gcc 2.7.2.3 trampoline creation code into arch/m68k/m68k.h
- adding the OS-specific code for this into arch/m68k/netbsd.h
These changes have been reflected in gcc2netbsd.
Norm Rubin and Richard Earnshaw.
PIC support for ARM will form part of the standard GCC tree from 2.8
onwards.
Also default to building soft-float as the resulting code will be a lot
faster then using emulated floating point instructions.
emit a call _cacheflush() to ensure Icache consistency
after writing trampoline code for lexical closures onto the stack
(i.e., into the Dcache).
GCC 2.x (x <= 7.2.2) emits a call cacehflush(), polluting the user
namespace.
support for shared libraries. Diffs from Manuel Bouyer, probably
derived from similar OpenBSD gcc diffs.
This change is in the source tree because it was used to build a NetBSD/pmax
shared-lib snapshot. The change isn't being integrated into the gcc2netbsd
script until the shared-lib diffs are finalized.
The NetbSD libc header files use GCC attributes to emit link-time warning
messages (e.g,. for gets()). SO, add a definition of the GCC back-end
macro ASM_OUTPUT_SECTION_NAME() to the mips back-end target-specific file.
This adds support for emitting warning attributes to binutils 2.6 or newer.
(Weak references may or may not work also).
This patch has been submitted to the FSF but hasn't made it into 2.7.2.1,
and seems to have got buried somewhere inside Cygnus.
is