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s390: implement sotruss support

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See commit 41b1792698 for testcase.

Note: while this works on s390x, the s390 code hangs when using -e.
But it hangs regardless of this code (the hang seems to occur before
the exit func is even called).  I didn't look too closely at it as
it seems to be an issue external to this file, so this code shouldn't
make the situation any worse.

Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
This commit is contained in:
Mike Frysinger 2013-12-24 04:31:22 -05:00
parent 0daf33f7d5
commit 7a02cfade8
2 changed files with 66 additions and 0 deletions
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ChangeLog
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@ -1,3 +1,7 @@
2014-01-16 Mike Frysinger <vapier@gentoo.org>
* sysdeps/s390/sotruss-lib.c: New file.
2014-01-16 Adhemerval Zanella <azanella@linux.vnet.ibm.com>
[BZ#16430]

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sysdeps/s390/sotruss-lib.c Normal file
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/* Override generic sotruss-lib.c to define actual functions for s390.
Copyright (C) 2012-2014 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library. If not, see
<http://www.gnu.org/licenses/>. */
#define HAVE_ARCH_PLTENTER
#define HAVE_ARCH_PLTEXIT
#include <elf/sotruss-lib.c>
#if __ELF_NATIVE_CLASS == 32
# define la_s390_gnu_pltenter la_s390_32_gnu_pltenter
# define la_s390_gnu_pltexit la_s390_32_gnu_pltexit
# define La_s390_regs La_s390_32_regs
# define La_s390_retval La_s390_32_retval
#else
# define la_s390_gnu_pltenter la_s390_64_gnu_pltenter
# define la_s390_gnu_pltexit la_s390_64_gnu_pltexit
# define La_s390_regs La_s390_64_regs
# define La_s390_retval La_s390_64_retval
#endif
ElfW(Addr)
la_s390_gnu_pltenter (ElfW(Sym) *sym,
unsigned int ndx __attribute__ ((unused)),
uintptr_t *refcook, uintptr_t *defcook,
La_s390_regs *regs, unsigned int *flags,
const char *symname, long int *framesizep)
{
print_enter (refcook, defcook, symname,
regs->lr_r2, regs->lr_r3, regs->lr_r4, *flags);
/* No need to copy anything, we will not need the parameters in any case. */
*framesizep = 0;
return sym->st_value;
}
unsigned int
la_s390_gnu_pltexit (ElfW(Sym) *sym, unsigned int ndx, uintptr_t *refcook,
uintptr_t *defcook,
const struct La_s390_regs *inregs,
struct La_s390_retval *outregs, const char *symname)
{
print_exit (refcook, defcook, symname, outregs->lrv_r2);
return 0;
}