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Emit .note.GNU-stack for the syscall stubs generated by libc only on

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architectures that support this .note. In particular, do not unneccessary
emit the notes on ia64 and sparc64, which ABI require non-executable stacks.

Tested by:	marcel
This commit is contained in:
Konstantin Belousov 2011-01-25 21:06:49 +00:00
parent 4503c8f7bd
commit f1410015f0
1 changed files with 9 additions and 2 deletions
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11
lib/libc/sys/Makefile.inc
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@ -53,16 +53,23 @@ SYM_MAPS+= ${.CURDIR}/sys/Symbol.map
# Generated files
CLEANFILES+= ${SASM} ${SPSEUDO}
.if ${MACHINE_CPUARCH} == "amd64" || ${MACHINE_CPUARCH} == "i386" || \
${MACHINE_CPUARCH} == "powerpc"
NOTE_GNU_STACK='\t.section .note.GNU-stack,"",%%progbits\n'
.else
NOTE_GNU_STACK=''
.endif
${SASM}:
printf '#include "compat.h"\n' > ${.TARGET}
printf '#include "SYS.h"\nRSYSCALL(${.PREFIX})\n' >> ${.TARGET}
printf '\t.section .note.GNU-stack,"",%%progbits\n' >>${.TARGET}
printf ${NOTE_GNU_STACK} >>${.TARGET}
${SPSEUDO}:
printf '#include "compat.h"\n' > ${.TARGET}
printf '#include "SYS.h"\nPSEUDO(${.PREFIX:S/_//})\n' \
>> ${.TARGET}
printf '\t.section .note.GNU-stack,"",%%progbits\n' >>${.TARGET}
printf ${NOTE_GNU_STACK} >>${.TARGET}
MAN+= abort2.2 accept.2 access.2 acct.2 adjtime.2 \
aio_cancel.2 aio_error.2 aio_read.2 aio_return.2 \