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Make (no pun intended) it possible to perform component symbol

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protection from a shell prompt with the command line:

    make -f /sys/rump/Makefile RUMP_SYMREN=module.kobj

This is benefitial especially on i386, where rump ABI matches the
kernel ABI (sans the renaming isolation).  In the above example
module.kobj can then be loaded in a rump kernel either statically
at link-time simply by giving module.kobj as an object to the
linker, or dynamically at runtime by calling rump_sys_modctl(MODCTL_LOAD).
This commit is contained in:
pooka 2010-01-31 00:38:36 +00:00
parent 92394bf5f3
commit 5412e3f097
1 changed files with 27 additions and 4 deletions
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29
sys/rump/Makefile.rump
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@ -1,4 +1,4 @@
# $NetBSD: Makefile.rump,v 1.45 2009/12/12 17:10:19 pooka Exp $
# $NetBSD: Makefile.rump,v 1.46 2010/01/31 00:38:36 pooka Exp $
#
WARNS?= 3 # XXX: src/sys won't compile with -Wsign-compare yet
@ -60,23 +60,46 @@ DPSRCS+= ${RUMPTOP}/Makefile.rump
# toolchain to toolchain. The good news, however, is that this will
# be detected by a compile-time failure, so we can fairly easily manage
# a quirktable here.
#
# We also allow calling ourselves externally with e.g.:
# make -f /sys/rump/Makefile.rump RUMP_SYMREN=ffs.kobj
#
.if ${MACHINE_CPU} == "mips"
_SYMQUIRK='|_gp_disp'
.elif ${MACHINE_CPU} == "hppa"
_SYMQUIRK='|\$$\$$'
.endif
rump_symren: __archivebuild
.if !defined(RUMP_SYMREN)
@echo "Must supply RUMP_SYMREN for target rump_symren"
@false
.endif
# if we are called from lib build (RUMP_SYMREN is not specified),
# build the arrrrchive. otherwise just rename symbols.
__archivebuild: .USE
.if defined(RUMP_SYMREN) && defined(RUMPTOP)
@echo "ERROR: RUMP_SYMREN can only be used standalone"
@false
.endif
.if defined(RUMP_SYMREN)
${_MKMSG} " symbol rename " ${RUMP_SYMREN}
.else
${_MKTARGET_BUILD}
rm -f ${.TARGET}
${AR} ${_ARFL} ${.TARGET} `NM=${NM} ${LORDER} ${.ALLSRC:M*o} | ${TSORT}`
${NM} -go ${.TARGET} | ${TOOL_AWK} ' \
.endif
${NM} -go ${RUMP_SYMREN:U${.TARGET}} | ${TOOL_AWK} ' \
$$NF!~/^(rump|RUMP|__|_GLOBAL_OFFSET_TABLE'${_SYMQUIRK}')/ \
{printf "%s rumpns_%s\n", $$NF, $$NF}' \
| sort | uniq > renametab.${.TARGET}
${OBJCOPY} --preserve-dates --redefine-syms \
renametab.${.TARGET} ${.TARGET}
renametab.${.TARGET} ${RUMP_SYMREN:U${.TARGET}}
rm -f renametab.${.TARGET}
.if !defined(RUMP_SYMREN)
${AR} ${_ARRANFL} ${.TARGET}
.endif
.-include "${NETBSDSRCDIR}/sys/arch/${MACHINE_CPU}/include/Makefile.inc"
.-include "${NETBSDSRCDIR}/sys/arch/${MACHINE}/include/Makefile.inc"