PowerPC: sotruss-lib implementation

[Adhemerval Zanella <azanella at linux dot vnet dot ibm dot com>]

Hi all,

This patch add the missing sotruss-lib interfaces for PowerPC. Tested on
PPC32, PPC64, PPC64LE. OK to apply?

---

2013-12-10  Adhemerval Zanella  <azanella@linux.vnet.ibm.com>

        * sysdeps/powerpc/sotruss-lib.c: New file: sotruss-lib.so
	implementation for powerpc.

--

diff --git a/sysdeps/powerpc/sotruss-lib.c b/sysdeps/powerpc/sotruss-lib.c
new file mode 100644
index 0000000..67779c4
--- /dev/null
+++ b/sysdeps/powerpc/sotruss-lib.c
@@ -0,0 +1,69 @@
+/* PowerPC specific sotruss-lib functions.
+   Copyright (C) 2013 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 defined(__PPC64__) || defined(__powerpc64__)
+# if _CALL_ELF != 2
+#  define LA_PPC_REGS          La_ppc64_regs
+#  define LA_PPC_RETVAL        La_ppc64_retval
+#  define LA_PPC_GNU_PLTENTER  la_ppc64_gnu_pltenter
+#  define LA_PPC_GNU_PLTEXIT   la_ppc64_gnu_pltexit
+# else
+#  define LA_PPC_REGS          La_ppc64v2_regs
+#  define LA_PPC_RETVAL        La_ppc64v2_retval
+#  define LA_PPC_GNU_PLTENTER  la_ppc64v2_gnu_pltenter
+#  define LA_PPC_GNU_PLTEXIT   la_ppc64v2_gnu_pltexit
+# endif
+# else
+# define LA_PPC_REGS           La_ppc32_regs
+# define LA_PPC_RETVAL         La_ppc32_retval
+# define LA_PPC_GNU_PLTENTER   la_ppc32_gnu_pltenter
+# define LA_PPC_GNU_PLTEXITA   la_ppc32_gnu_pltexit
+#endif
+
+ElfW(Addr)
+LA_PPC_GNU_PLTENTER (ElfW(Sym) *sym __attribute__ ((unused)),
+		     unsigned int ndx __attribute__ ((unused)),
+		     uintptr_t *refcook, uintptr_t *defcook,
+		     LA_PPC_REGS *regs, unsigned int *flags,
+		     const char *symname, long int *framesizep)
+{
+  print_enter (refcook, defcook, symname,
+	       regs->lr_reg[0], regs->lr_reg[1], regs->lr_reg[2], *flags);
+
+  /* No need to copy anything, we will not need the parameters in any case.  */
+  *framesizep = 0;
+
+  return sym->st_value;
+}
+
+unsigned int
+LA_PPC_GNU_PLTEXIT (ElfW(Sym) *sym, unsigned int ndx, uintptr_t *refcook,
+		    uintptr_t *defcook,
+		    const struct LA_PPC_REGS *inregs,
+		    struct LA_PPC_RETVAL *outregs, const char *symname)
+{
+  print_exit (refcook, defcook, symname, outregs->lrv_r3);
+
+  return 0;
+}