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Skip extra zeroes when searching auxv on s390

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Andreas Krebbel 2011-04-17 20:41:45 -04:00 committed by Ulrich Drepper
parent 7b57bfe598
commit 1044270502
2 changed files with 17 additions and 0 deletions
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ChangeLog
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@ -1,3 +1,8 @@
2011-04-11 Andreas Krebbel <Andreas.Krebbel@de.ibm.com>
* sysdeps/s390/s390-32/elf/start.S (_start): Skip extra zeroes
between environment variables and auxiliary vector.
2011-04-16 Ulrich Drepper <drepper@gmail.com>
* Makefile: Add rules to build linkobj/libc.so.

12
sysdeps/s390/s390-32/elf/start.S
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@ -75,6 +75,18 @@ _start:
ltr %r5,%r5
jne .L12
/* Usually the auxiliary vector can be expected directly after
the environment variables. But we have to skip extra zeros
because the loader might have removed unsecure variables for
setuid programs. */
.L26: l %r5,0(%r6)
la %r6,4(%r6)
ltr %r5,%r5
jz .L26
ahi %r6,-4
/* Obtain the needed values from the auxiliary vector. */
lhi %r7,16 /* AT_HWCAP */