CVS commit: src/sys/arch/usermode/modules/syscallemu

["Jared D. McNeill" <jmcneill%netbsd.org@localhost>]

Module Name:    src
Committed By:   jmcneill
Date:           Thu Jan  5 13:26:51 UTC 2012

Added Files:
        src/sys/arch/usermode/modules/syscallemu: Makefile syscallemu.c
            syscallemu.h syscallemu_i386.c

Log Message:
Add 'syscallemu' module, required by usermode kernel.

This module registers a syscall that takes a user_start and user_end address.
When a process calls SYS_syscallemu, the start and end address are recorded
and the syscall installs a filter on p->p_md.md_syscall. The filter then
uses the specified start and end addresses to determine where the syscall
should be routed (either host by calling the original md_syscall function,
or process by posting SIGILL).


To generate a diff of this commit:
cvs rdiff -u -r0 -r1.1 src/sys/arch/usermode/modules/syscallemu/Makefile \
    src/sys/arch/usermode/modules/syscallemu/syscallemu.c \
    src/sys/arch/usermode/modules/syscallemu/syscallemu.h \
    src/sys/arch/usermode/modules/syscallemu/syscallemu_i386.c

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