CVS commit: [matt-nb5-mips64] src/sys

[Matt Thomas <matt%netbsd.org@localhost>]

Module Name:    src
Committed By:   matt
Date:           Sun Aug 23 03:38:19 UTC 2009

Modified Files:
        src/sys/arch/mips/include [matt-nb5-mips64]: types.h
        src/sys/arch/mips/mips [matt-nb5-mips64]: mips_machdep.c
            process_machdep.c
        src/sys/kern [matt-nb5-mips64]: core_elf32.c sys_process.c
        src/sys/sys [matt-nb5-mips64]: ptrace.h

Log Message:
Change lazy fp load/save is done.  fpcurlwp is never NULL.
If no current lwp has the FP, then fpcurlwp is set to lwp0.
this allows many check for NULL and avoids a few null-derefs.
Since savefpregs clear COP1, loadfpregs can be called to reload
fpregs.  If it notices that situation, it just sets COP1 and returns
Save does not reset fpcurlwp, just clears COP1.  load does set fpcurlwp.

If MIPS3_SR_FR is set, all 32 64-bit FP registers are saved/restored via Xdc1.
If MIPS3_SR_FR is clear, only 32 32-bit FP register are saved/restore via Xwc1.
This preserves the existing ABI.


To generate a diff of this commit:
cvs rdiff -u -r1.43.36.2 -r1.43.36.3 src/sys/arch/mips/include/types.h
cvs rdiff -u -r1.205.4.1.2.1.2.2 -r1.205.4.1.2.1.2.3 \
    src/sys/arch/mips/mips/mips_machdep.c
cvs rdiff -u -r1.29.62.1 -r1.29.62.2 src/sys/arch/mips/mips/process_machdep.c
cvs rdiff -u -r1.32.16.1 -r1.32.16.2 src/sys/kern/core_elf32.c
cvs rdiff -u -r1.143.4.1 -r1.143.4.1.4.1 src/sys/kern/sys_process.c
cvs rdiff -u -r1.40 -r1.40.28.1 src/sys/sys/ptrace.h

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.