+2013-06-28 Ryan S. Arnold <rsa@linux.vnet.ibm.com>
+
+ * sysdeps/powerpc/Makefile: Add comment about generating an offset to
+ rtld_global._dl_hwcap2.
+ * sysdeps/powerpc/bits/hwcap.h: Added PPC_FEATURE2_* definitions for
+ POWER8.
+ * sysdeps/powerpc/dl-procinfo.c (_dl_powerpc_cap_flags): Extend for
+ POWER8 feature descriptions defined in _dl_hwcap2.
+ * sysdeps/powerpc/dl-procinfo.h (_dl_procinfo): Implement AT_HWCAP2
+ string handling for POWER8 feature bits.
+ (_DL_HWCAP_COUNT): Increment to 64 to cover AT_HWCAP2 bits.
+ (_DL_HWCAP_LAST): New definition for position of last AT_HWCAP bit in
+ _dl_powerpc_cap_flags.
+ (_DL_HWCAP2_LAST): New definition for last usable bit of AT_HWCAP2.
+ * sysdeps/powerpc/rtld-global-offsets.sym
+ (RTLD_GLOBAL_RO_DL_HWCAP2_OFFSET): New offset macro to locate
+ _dl_hwcap2 in the rtld_global_ro structure.
+
2013-06-28 Ryan S. Arnold <rsa@linux.vnet.ibm.com>
* elf/dl-support.c (_dl_hwcap2): Add a new hwcap field for more
endif
ifeq ($(subdir),csu)
-# get offset to rtld_global._dl_hwcap
+# get offset to rtld_global._dl_hwcap and rtld_global._dl_hwcap2
gen-as-const-headers += rtld-global-offsets.sym
# get offset to __locale_struct.__ctype_tolower
gen-as-const-headers += locale-defines.sym
-/* Defines for bits in AT_HWCAP.
+/* Defines for bits in AT_HWCAP and AT_HWCAP2.
Copyright (C) 2012-2013 Free Software Foundation, Inc.
This file is part of the GNU C Library.
# error "Never include <bits/hwcap.h> directly; use <sys/auxv.h> instead."
#endif
-/*
- * The following must match the kernels asm/cputable.h.
- */
+/* The bit numbers must match those in the kernel's asm/cputable.h. */
+
+/* Feature definitions in AT_HWCAP. */
#define PPC_FEATURE_32 0x80000000 /* 32-bit mode. */
#define PPC_FEATURE_64 0x40000000 /* 64-bit mode. */
#define PPC_FEATURE_601_INSTR 0x20000000 /* 601 chip, Old POWER ISA. */
#define PPC_FEATURE_POWER5 0x00040000 /* POWER5 ISA 2.02 */
#define PPC_FEATURE_POWER5_PLUS 0x00020000 /* POWER5+ ISA 2.03 */
#define PPC_FEATURE_CELL_BE 0x00010000 /* CELL Broadband Engine */
-#define PPC_FEATURE_BOOKE 0x00008000
-#define PPC_FEATURE_SMT 0x00004000 /* Simultaneous Multi-Threading */
+#define PPC_FEATURE_BOOKE 0x00008000 /* ISA Category Embedded */
+#define PPC_FEATURE_SMT 0x00004000 /* Simultaneous
+ Multi-Threading */
#define PPC_FEATURE_ICACHE_SNOOP 0x00002000
#define PPC_FEATURE_ARCH_2_05 0x00001000 /* ISA 2.05 */
#define PPC_FEATURE_PA6T 0x00000800 /* PA Semi 6T Core */
#define PPC_FEATURE_PSERIES_PERFMON_COMPAT 0x00000040
#define PPC_FEATURE_TRUE_LE 0x00000002
#define PPC_FEATURE_PPC_LE 0x00000001
+
+/* Feature definitions in AT_HWCAP2. */
+#define PPC_FEATURE2_ARCH_2_07 0x80000000 /* ISA 2.07 */
+#define PPC_FEATURE2_HAS_HTM 0x40000000 /* Hardware Transactional
+ Memory */
+#define PPC_FEATURE2_HAS_DSCR 0x20000000 /* Data Stream Control
+ Register */
+#define PPC_FEATURE2_HAS_EBB 0x10000000 /* Event Base Branching */
+#define PPC_FEATURE2_HAS_ISEL 0x08000000 /* Integer Select */
+#define PPC_FEATURE2_HAS_TAR 0x04000000 /* Target Address Register */
#if !defined PROCINFO_DECL && defined SHARED
._dl_powerpc_cap_flags
#else
-PROCINFO_CLASS const char _dl_powerpc_cap_flags[25][10]
+PROCINFO_CLASS const char _dl_powerpc_cap_flags[57][10]
#endif
#ifndef PROCINFO_DECL
= {
"notb", "efpdouble", "efpsingle", "spe",
"ucache", "4xxmac", "mmu", "fpu",
"altivec", "ppc601", "ppc64", "ppc32",
+ "", "", "", "",
+ "", "", "", "",
+ "", "", "", "",
+ "", "", "", "",
+ "", "", "", "",
+ "", "", "", "",
+ "", "", "tar", "isel",
+ "ebb", "dscr", "htm", "arch_2_07",
}
#endif
#if !defined SHARED || defined PROCINFO_DECL
#define _DL_PROCINFO_H 1
#include <ldsodefs.h>
-#include <sysdep.h> /* This defines the PPC_FEATURE_* macros. */
+#include <sysdep.h> /* This defines the PPC_FEATURE[2]_* macros. */
/* There are 25 bits used, but they are bits 7..31. */
#define _DL_HWCAP_FIRST 7
-#define _DL_HWCAP_COUNT 32
+
+/* The total number of available bits (including those prior to
+ _DL_HWCAP_FIRST). Some of these bits might not be used. */
+#define _DL_HWCAP_COUNT 64
+
+/* Features started at bit 31 and decremented as new features were added. */
+#define _DL_HWCAP_LAST 31
+
+/* AT_HWCAP2 features started at bit 31 and decremented as new features were
+ added. HWCAP2 feature bits start at bit 0. */
+#define _DL_HWCAP2_LAST 31
/* These bits influence library search. */
#define HWCAP_IMPORTANT (PPC_FEATURE_HAS_ALTIVEC \
__attribute__ ((unused))
_dl_procinfo (unsigned int type, unsigned long int word)
{
- /* Fallback to unknown output mechanism. */
- if (type == AT_HWCAP2)
- return -1;
-
- _dl_printf ("AT_HWCAP: ");
-
- for (int i = _DL_HWCAP_FIRST; i < _DL_HWCAP_COUNT; ++i)
- if (word & (1 << i))
- _dl_printf (" %s", _dl_hwcap_string (i));
-
- _dl_printf ("\n");
-
+ switch(type)
+ {
+ case AT_HWCAP:
+ _dl_printf ("AT_HWCAP: ");
+
+ for (int i = _DL_HWCAP_FIRST; i <= _DL_HWCAP_LAST; ++i)
+ if (word & (1 << i))
+ _dl_printf (" %s", _dl_hwcap_string (i));
+ break;
+ case AT_HWCAP2:
+ {
+ unsigned int offset = _DL_HWCAP_LAST + 1;
+
+ _dl_printf ("AT_HWCAP2: ");
+
+ /* We have to go through them all because the kernel added the
+ AT_HWCAP2 features starting with the high bits. */
+ for (int i = 0; i <= _DL_HWCAP2_LAST; ++i)
+ if (word & (1 << i))
+ _dl_printf (" %s", _dl_hwcap_string (offset + i));
+ break;
+ }
+ default:
+ /* This should not happen. */
+ return -1;
+ }
+ _dl_printf ("\n");
return 0;
}
#endif
#define rtld_global_ro_offsetof(mem) offsetof (struct rtld_global_ro, mem)
RTLD_GLOBAL_RO_DL_HWCAP_OFFSET rtld_global_ro_offsetof (_dl_hwcap)
+RTLD_GLOBAL_RO_DL_HWCAP2_OFFSET rtld_global_ro_offsetof (_dl_hwcap2)
git://sourceware.org / glibc.git / commitdiff