Add GLRO(dl_hwcap2) for new AT_HWCAP2 auxv_t a_type.

(cherry picked from commit 1ae8bfe07c1ab2444cc1d186321ff1431a1b9f96)

18 files changed, 89 insertions, 13 deletions

diff --git a/ChangeLog b/ChangeLog
index 7df6187e3c..4addd6b70e 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,28 @@
+2013-06-28  Ryan S. Arnold  <rsa@linux.vnet.ibm.com>
+
+	* elf/dl-support.c (_dl_hwcap2): Add a new hwcap field for more
+	hardware capabilities in support of AT_HWCAP2.
+	(_dl_aux_init): Read AT_HWCAP2 into GLRO(dl_hwcap2).
+	* elf/dl-sysdep.c (_dl_sysdep_start): Read AT_HWCAP2 into
+	GLRO(dl_hwcap2).
+	(_dl_show_auxv): Add support for calling _dl_procinfo to display
+	AT_HWCAP2.  If a platform doesn't chose to handle displaying AT_HWCAP2
+	explicitly the unknown a_type display mechanism is used.
+	* misc/getauxval.c (__getauxval): Return GLRO(dl_hwcap2) on AT_HWCAP2.
+	* sysdeps/generic/ldsodefs.h (rtld_global_ro): Add _dl_hwcap2 as a new
+	struct member.
+	* sysdeps/generic/dl-procinfo.h (_dl_procinfo): Add TYPE parameter
+	to macro prototype for AT_HWCAP2 support.
+	* sysdeps/i386/dl-procinfo.h: Likewise.
+	* sysdeps/s390/dl-procinfo.h: Likewise.
+	* sysdeps/powerpc/dl-procinfo.h (_dl_procinfo): Add TYPE parameter to
+	macro prototype for AT_HWCAP2 support.  Make WORD unsigned long int
+	rather than signed int.  Stub in handler for TYPE == AT_HWCAP2 to
+	return -1 for unknown a_type display fallback.
+	* sysdeps/sparc/dl-procinfo.h: Likewise.
+	* sysdeps/unix/sysv/linux/i386/dl-procinfo.h: Likewise.
+	* sysdeps/unix/sysv/linux/s390/dl-procinfo.h: Likewise.
+
 2013-06-26  Ryan S. Arnold  <rsa@linux.vnet.ibm.com>
 
 	* elf/elf.h (AT_HWCAP2): Add a new a_type entry.
diff --git a/elf/dl-support.c b/elf/dl-support.c
index 81e71720c6..05f53ee7e9 100644
--- a/elf/dl-support.c
+++ b/elf/dl-support.c
@@ -129,6 +129,7 @@ ElfW(auxv_t) *_dl_auxv;
 ElfW(Phdr) *_dl_phdr;
 size_t _dl_phnum;
 uint64_t _dl_hwcap __attribute__ ((nocommon));
+uint64_t _dl_hwcap2 __attribute__ ((nocommon));
 
 /* This is not initialized to HWCAP_IMPORTANT, matching the definition
    of _dl_important_hwcaps, below, where no hwcap strings are ever
@@ -212,6 +213,9 @@ _dl_aux_init (ElfW(auxv_t) *av)
       case AT_HWCAP:
 	GLRO(dl_hwcap) = (unsigned long int) av->a_un.a_val;
 	break;
+      case AT_HWCAP2:
+	GLRO(dl_hwcap2) = (unsigned long int) av->a_un.a_val;
+	break;
 #ifdef NEED_DL_SYSINFO
       case AT_SYSINFO:
 	GL(dl_sysinfo) = av->a_un.a_val;
diff --git a/elf/dl-sysdep.c b/elf/dl-sysdep.c
index 65a90469c6..a0d1d044ce 100644
--- a/elf/dl-sysdep.c
+++ b/elf/dl-sysdep.c
@@ -156,6 +156,9 @@ _dl_sysdep_start (void **start_argptr,
       case AT_HWCAP:
 	GLRO(dl_hwcap) = (unsigned long int) av->a_un.a_val;
 	break;
+      case AT_HWCAP2:
+	GLRO(dl_hwcap2) = (unsigned long int) av->a_un.a_val;
+	break;
       case AT_CLKTCK:
 	GLRO(dl_clktck) = av->a_un.a_val;
 	break;
@@ -298,6 +301,7 @@ _dl_show_auxv (void)
 	  [AT_SYSINFO - 2] =		{ "SYSINFO:      0x", hex },
 	  [AT_SYSINFO_EHDR - 2] =	{ "SYSINFO_EHDR: 0x", hex },
 	  [AT_RANDOM - 2] =		{ "RANDOM:       0x", hex },
+	  [AT_HWCAP2 - 2] =		{ "HWCAP2:       0x", hex },
 	};
       unsigned int idx = (unsigned int) (av->a_type - 2);
 
@@ -309,10 +313,10 @@ _dl_show_auxv (void)
       assert (AT_NULL == 0);
       assert (AT_IGNORE == 1);
 
-      if (av->a_type == AT_HWCAP)
+      if (av->a_type == AT_HWCAP || av->a_type == AT_HWCAP2)
 	{
-	  /* This is handled special.  */
-	  if (_dl_procinfo (av->a_un.a_val) == 0)
+	  /* These are handled in a special way per platform.  */
+	  if (_dl_procinfo (av->a_type, av->a_un.a_val) == 0)
 	    continue;
 	}
 
diff --git a/misc/getauxval.c b/misc/getauxval.c
index bff456084e..1c1882bb49 100644
--- a/misc/getauxval.c
+++ b/misc/getauxval.c
@@ -26,6 +26,8 @@ __getauxval (unsigned long int type)
 
   if (type == AT_HWCAP)
     return GLRO(dl_hwcap);
+  else if (type == AT_HWCAP2)
+    return GLRO(dl_hwcap2);
 
   for (p = GLRO(dl_auxv); p->a_type != AT_NULL; p++)
     if (p->a_type == type)
diff --git a/ports/ChangeLog.alpha b/ports/ChangeLog.alpha
index 39fd14d790..054e4047e5 100644
--- a/ports/ChangeLog.alpha
+++ b/ports/ChangeLog.alpha
@@ -1,3 +1,8 @@
+2013-06-28  Ryan S. Arnold  <rsa@linux.vnet.ibm.com>
+
+	* sysdeps/alpha/dl-procinfo.h (_dl_procinfo): Add TYPE parameter
+	to macro prototype for AT_HWCAP2 support.
+
 2013-05-22  Edjunior Barbosa Machado  <emachado@linux.vnet.ibm.com>
 
 	* sysdeps/unix/sysv/linux/alpha/bits/siginfo.h (siginfo_t): Add
diff --git a/ports/ChangeLog.arm b/ports/ChangeLog.arm
index 75a88265fb..c1b8fc0a2d 100644
--- a/ports/ChangeLog.arm
+++ b/ports/ChangeLog.arm
@@ -1,3 +1,10 @@
+2013-06-28  Ryan S. Arnold  <rsa@linux.vnet.ibm.com>
+
+	* sysdeps/unix/sysv/linux/arm/dl-procinfo.h (_dl_procinfo): Add
+	TYPE parameter to macro prototype for AT_HWCAP2 support.  Make WORD
+	unsigned long int rather than signed int.  Stub in handler for TYPE ==
+	AT_HWCAP2 to return -1 for unknown a_type display fallback.
+
 2013-02-08  Carlos O'Donell  <carlos@redhat.com>
 
 	[BZ #15006]
diff --git a/ports/ChangeLog.mips b/ports/ChangeLog.mips
index 5eca3b9612..445548af8c 100644
--- a/ports/ChangeLog.mips
+++ b/ports/ChangeLog.mips
@@ -1,3 +1,8 @@
+2013-06-28  Ryan S. Arnold  <rsa@linux.vnet.ibm.com>
+
+	* sysdeps/mips/dl-procinfo.h (_dl_procinfo): Add TYPE parameter
+	to macro prototype for AT_HWCAP2 support.
+
 2013-05-22  Edjunior Barbosa Machado  <emachado@linux.vnet.ibm.com>
 
 	* sysdeps/unix/sysv/linux/mips/bits/siginfo.h (siginfo_t): Add
diff --git a/ports/sysdeps/alpha/dl-procinfo.h b/ports/sysdeps/alpha/dl-procinfo.h
index 3db0efb200..c3b27b46b4 100644
--- a/ports/sysdeps/alpha/dl-procinfo.h
+++ b/ports/sysdeps/alpha/dl-procinfo.h
@@ -51,7 +51,7 @@ _dl_string_platform (const char *str)
 };
 
 /* We cannot provide a general printing function.  */
-#define _dl_procinfo(word) -1
+#define _dl_procinfo(type, word) -1
 
 /* There are no hardware capabilities defined.  */
 #define _dl_hwcap_string(idx) ""
diff --git a/ports/sysdeps/mips/dl-procinfo.h b/ports/sysdeps/mips/dl-procinfo.h
index d42aea7141..8c9f5c2347 100644
--- a/ports/sysdeps/mips/dl-procinfo.h
+++ b/ports/sysdeps/mips/dl-procinfo.h
@@ -51,7 +51,7 @@ _dl_string_platform (const char *str)
 };
 
 /* We cannot provide a general printing function.  */
-#define _dl_procinfo(word) -1
+#define _dl_procinfo(type, word) -1
 
 /* There are no hardware capabilities defined.  */
 #define _dl_hwcap_string(idx) ""
diff --git a/ports/sysdeps/unix/sysv/linux/arm/dl-procinfo.h b/ports/sysdeps/unix/sysv/linux/arm/dl-procinfo.h
index bea7100e13..c96297b0ee 100644
--- a/ports/sysdeps/unix/sysv/linux/arm/dl-procinfo.h
+++ b/ports/sysdeps/unix/sysv/linux/arm/dl-procinfo.h
@@ -31,10 +31,14 @@
 
 static inline int
 __attribute__ ((unused))
-_dl_procinfo (int word)
+_dl_procinfo (unsigned int type, unsigned long int word)
 {
   int i;
 
+  /* Fallback to unknown output mechanism.  */
+  if (type == AT_HWCAP2)
+    return -1;
+
   _dl_printf ("AT_HWCAP:   ");
 
   for (i = 0; i < _DL_HWCAP_COUNT; ++i)
diff --git a/sysdeps/generic/dl-procinfo.h b/sysdeps/generic/dl-procinfo.h
index c2bf914457..0345717333 100644
--- a/sysdeps/generic/dl-procinfo.h
+++ b/sysdeps/generic/dl-procinfo.h
@@ -21,7 +21,7 @@
 #define _DL_PROCINFO_H	1
 
 /* We cannot provide a general printing function.  */
-#define _dl_procinfo(word) -1
+#define _dl_procinfo(type, word) -1
 
 /* There are no hardware capabilities defined.  */
 #define _dl_hwcap_string(idx) ""
diff --git a/sysdeps/generic/ldsodefs.h b/sysdeps/generic/ldsodefs.h
index c667e34244..5635d72e79 100644
--- a/sysdeps/generic/ldsodefs.h
+++ b/sysdeps/generic/ldsodefs.h
@@ -548,6 +548,10 @@ struct rtld_global_ro
   EXTERN struct link_map *_dl_sysinfo_map;
 #endif
 
+  /* Mask for more hardware capabilities that are available on some
+     platforms.  */
+  EXTERN uint64_t _dl_hwcap2;
+
 #ifdef SHARED
   /* We add a function table to _rtld_global which is then used to
      call the function instead of going through the PLT.  The result
diff --git a/sysdeps/i386/dl-procinfo.h b/sysdeps/i386/dl-procinfo.h
index 6ecaac2c73..38e902d8bd 100644
--- a/sysdeps/i386/dl-procinfo.h
+++ b/sysdeps/i386/dl-procinfo.h
@@ -61,7 +61,7 @@ enum
 };
 
 /* We cannot provide a general printing function.  */
-#define _dl_procinfo(word) -1
+#define _dl_procinfo(type, word) -1
 
 static inline const char *
 __attribute__ ((unused))
diff --git a/sysdeps/powerpc/dl-procinfo.h b/sysdeps/powerpc/dl-procinfo.h
index 0939dcfeac..7732ed2226 100644
--- a/sysdeps/powerpc/dl-procinfo.h
+++ b/sysdeps/powerpc/dl-procinfo.h
@@ -159,8 +159,12 @@ _dl_string_platform (const char *str)
 #ifdef IS_IN_rtld
 static inline int
 __attribute__ ((unused))
-_dl_procinfo (int word)
+_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)
diff --git a/sysdeps/s390/dl-procinfo.h b/sysdeps/s390/dl-procinfo.h
index 97dcf074f2..26de0430d5 100644
--- a/sysdeps/s390/dl-procinfo.h
+++ b/sysdeps/s390/dl-procinfo.h
@@ -56,7 +56,7 @@ enum
 			  | HWCAP_S390_EIMM | HWCAP_S390_DFP)
 
 /* We cannot provide a general printing function.  */
-#define _dl_procinfo(word) -1
+#define _dl_procinfo(type, word) -1
 
 static inline const char *
 __attribute__ ((unused))
diff --git a/sysdeps/sparc/dl-procinfo.h b/sysdeps/sparc/dl-procinfo.h
index 6ae8768288..a05d4589eb 100644
--- a/sysdeps/sparc/dl-procinfo.h
+++ b/sysdeps/sparc/dl-procinfo.h
@@ -28,10 +28,14 @@
 
 static inline int
 __attribute__ ((unused))
-_dl_procinfo (int word)
+_dl_procinfo (unsigned int type, unsigned long int word)
 {
   int i;
 
+  /* Fallback to unknown output mechanism.  */
+  if (type == AT_HWCAP2)
+    return -1;
+
   _dl_printf ("AT_HWCAP:   ");
 
   for (i = 0; i < _DL_HWCAP_COUNT; ++i)
diff --git a/sysdeps/unix/sysv/linux/i386/dl-procinfo.h b/sysdeps/unix/sysv/linux/i386/dl-procinfo.h
index 4c61357582..23f4501bb6 100644
--- a/sysdeps/unix/sysv/linux/i386/dl-procinfo.h
+++ b/sysdeps/unix/sysv/linux/i386/dl-procinfo.h
@@ -24,12 +24,16 @@
 #undef _dl_procinfo
 static inline int
 __attribute__ ((unused))
-_dl_procinfo (int word)
+_dl_procinfo (unsigned int type, unsigned long int word)
 {
   /* This table should match the information from arch/i386/kernel/setup.c
      in the kernel sources.  */
   int i;
 
+  /* Fallback to unknown output mechanism.  */
+  if (type == AT_HWCAP2)
+    return -1;
+
   _dl_printf ("AT_HWCAP:   ");
 
   for (i = 0; i < _DL_HWCAP_COUNT; ++i)
diff --git a/sysdeps/unix/sysv/linux/s390/dl-procinfo.h b/sysdeps/unix/sysv/linux/s390/dl-procinfo.h
index f36ba55155..759738e454 100644
--- a/sysdeps/unix/sysv/linux/s390/dl-procinfo.h
+++ b/sysdeps/unix/sysv/linux/s390/dl-procinfo.h
@@ -24,12 +24,16 @@
 #undef _dl_procinfo
 static inline int
 __attribute__ ((unused))
-_dl_procinfo (int word)
+_dl_procinfo (unsigned int type, unsigned long int word)
 {
   /* This table should match the information from arch/s390/kernel/setup.c
      in the kernel sources.  */
   int i;
 
+  /* Fallback to unknown output mechanism.  */
+  if (type == AT_HWCAP2)
+    return -1;
+
   _dl_printf ("AT_HWCAP:   ");
 
   for (i = 0; i < _DL_HWCAP_COUNT; ++i)