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authorAdhemerval Zanella <azanella@linux.vnet.ibm.com>2013-10-14 06:55:28 -0500
committerAdhemerval Zanella <azanella@linux.vnet.ibm.com>2013-12-06 05:46:59 -0600
commit4c628e0026157a723744b5225235dbc40436df61 (patch)
treecb24a8e881448b65db18841d48b60963493c5f47 /sysdeps
parentf4479220946ab71e6d73e8a7bd7e96b148e848f7 (diff)
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PowerPC: initial support for multilib for PowerPC32
This patch add a empty Makefile, the C IFUNC helper macros, and a empty available IFUNC implementation enumeration.
Diffstat (limited to 'sysdeps')
-rw-r--r--sysdeps/powerpc/powerpc32/power4/multiarch/Makefile3
-rw-r--r--sysdeps/powerpc/powerpc32/power4/multiarch/ifunc-impl-list.c50
-rw-r--r--sysdeps/powerpc/powerpc32/power4/multiarch/init-arch.h52
-rw-r--r--sysdeps/unix/sysv/linux/powerpc/powerpc32/power4/Implies2
4 files changed, 105 insertions, 2 deletions
diff --git a/sysdeps/powerpc/powerpc32/power4/multiarch/Makefile b/sysdeps/powerpc/powerpc32/power4/multiarch/Makefile
new file mode 100644
index 0000000..af8d496
--- /dev/null
+++ b/sysdeps/powerpc/powerpc32/power4/multiarch/Makefile
@@ -0,0 +1,3 @@
+ifeq ($(subdir),string)
+sysdep_routines +=
+endif
diff --git a/sysdeps/powerpc/powerpc32/power4/multiarch/ifunc-impl-list.c b/sysdeps/powerpc/powerpc32/power4/multiarch/ifunc-impl-list.c
new file mode 100644
index 0000000..f4e55ae
--- /dev/null
+++ b/sysdeps/powerpc/powerpc32/power4/multiarch/ifunc-impl-list.c
@@ -0,0 +1,50 @@
+/* Enumerate available IFUNC implementations of a function. PowerPC32 version.
+ 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/>. */
+
+#include <assert.h>
+#include <string.h>
+#include <wchar.h>
+#include <ldsodefs.h>
+#include <ifunc-impl-list.h>
+
+/* Maximum number of IFUNC implementations. */
+#define MAX_IFUNC 6
+
+size_t
+__libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
+ size_t max)
+{
+ assert (max >= MAX_IFUNC);
+
+ size_t i = 0;
+
+ unsigned long int hwcap = GLRO(dl_hwcap);
+ /* hwcap contains only the latest supported ISA, the code checks which is
+ and fills the previous supported ones. */
+ if (hwcap & PPC_FEATURE_ARCH_2_06)
+ hwcap |= PPC_FEATURE_ARCH_2_05 | PPC_FEATURE_POWER5_PLUS |
+ PPC_FEATURE_POWER5 | PPC_FEATURE_POWER4;
+ else if (hwcap & PPC_FEATURE_ARCH_2_05)
+ hwcap |= PPC_FEATURE_POWER5_PLUS | PPC_FEATURE_POWER5 | PPC_FEATURE_POWER4;
+ else if (hwcap & PPC_FEATURE_POWER5_PLUS)
+ hwcap |= PPC_FEATURE_POWER5 | PPC_FEATURE_POWER4;
+ else if (hwcap & PPC_FEATURE_POWER5)
+ hwcap |= PPC_FEATURE_POWER4;
+
+ return i;
+}
diff --git a/sysdeps/powerpc/powerpc32/power4/multiarch/init-arch.h b/sysdeps/powerpc/powerpc32/power4/multiarch/init-arch.h
new file mode 100644
index 0000000..490c0b4
--- /dev/null
+++ b/sysdeps/powerpc/powerpc32/power4/multiarch/init-arch.h
@@ -0,0 +1,52 @@
+/* This file is part of the GNU C Library.
+ Copyright (C) 2013 Free Software Foundation, Inc.
+
+ 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/>. */
+
+#include <ldsodefs.h>
+
+/* The code checks if _rtld_global_ro was realocated before trying to access
+ the dl_hwcap field. The assembly is to make the compiler not optimize the
+ test (&_rtld_global_ro != NULL), which is always true in ISO C (but not
+ in that case since _rtld_global_ro might not been realocated yet). */
+#if defined(SHARED) && !defined(IS_IN_rtld)
+# define __GLRO(value) \
+ ({ volatile void **__p = (volatile void**)(&_rtld_global_ro); \
+ unsigned long int __ret; \
+ asm ("# x in %0" : "+r" (__p)); \
+ __ret = (__p) ? GLRO(value) : 0; \
+ __ret; })
+#else
+# define __GLRO(value) GLRO(value)
+#endif
+
+/* dl_hwcap contains only the latest supported ISA, the macro checks which is
+ and fills the previous ones. */
+#define INIT_ARCH() \
+ unsigned long int hwcap = __GLRO(dl_hwcap); \
+ if (hwcap & PPC_FEATURE_ARCH_2_06) \
+ hwcap |= PPC_FEATURE_ARCH_2_05 | \
+ PPC_FEATURE_POWER5_PLUS | \
+ PPC_FEATURE_POWER5 | \
+ PPC_FEATURE_POWER4; \
+ else if (hwcap & PPC_FEATURE_ARCH_2_05) \
+ hwcap |= PPC_FEATURE_POWER5_PLUS | \
+ PPC_FEATURE_POWER5 | \
+ PPC_FEATURE_POWER4; \
+ else if (hwcap & PPC_FEATURE_POWER5_PLUS) \
+ hwcap |= PPC_FEATURE_POWER5 | \
+ PPC_FEATURE_POWER4; \
+ else if (hwcap & PPC_FEATURE_POWER5) \
+ hwcap |= PPC_FEATURE_POWER4;
diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/power4/Implies b/sysdeps/unix/sysv/linux/powerpc/powerpc32/power4/Implies
deleted file mode 100644
index 17139bf..0000000
--- a/sysdeps/unix/sysv/linux/powerpc/powerpc32/power4/Implies
+++ /dev/null
@@ -1,2 +0,0 @@
-powerpc/powerpc32/power4/fpu
-powerpc/powerpc32/power4