tcg-ppc64: Use qemu_getauxval

Allow host detection on linux systems without glibc 2.16 or later.
Reviewed-by: NPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: NRichard Henderson <rth@twiddle.net>

include/elf.h

@@ -411,6 +411,40 @@ typedef struct {
 #define R_SPARC_5		44
 #define R_SPARC_6		45
 
+/* Bits present in AT_HWCAP for PowerPC.  */
+
+#define PPC_FEATURE_32                  0x80000000
+#define PPC_FEATURE_64                  0x40000000
+#define PPC_FEATURE_601_INSTR           0x20000000
+#define PPC_FEATURE_HAS_ALTIVEC         0x10000000
+#define PPC_FEATURE_HAS_FPU             0x08000000
+#define PPC_FEATURE_HAS_MMU             0x04000000
+#define PPC_FEATURE_HAS_4xxMAC          0x02000000
+#define PPC_FEATURE_UNIFIED_CACHE       0x01000000
+#define PPC_FEATURE_HAS_SPE             0x00800000
+#define PPC_FEATURE_HAS_EFP_SINGLE      0x00400000
+#define PPC_FEATURE_HAS_EFP_DOUBLE      0x00200000
+#define PPC_FEATURE_NO_TB               0x00100000
+#define PPC_FEATURE_POWER4              0x00080000
+#define PPC_FEATURE_POWER5              0x00040000
+#define PPC_FEATURE_POWER5_PLUS         0x00020000
+#define PPC_FEATURE_CELL                0x00010000
+#define PPC_FEATURE_BOOKE               0x00008000
+#define PPC_FEATURE_SMT                 0x00004000
+#define PPC_FEATURE_ICACHE_SNOOP        0x00002000
+#define PPC_FEATURE_ARCH_2_05           0x00001000
+#define PPC_FEATURE_PA6T                0x00000800
+#define PPC_FEATURE_HAS_DFP             0x00000400
+#define PPC_FEATURE_POWER6_EXT          0x00000200
+#define PPC_FEATURE_ARCH_2_06           0x00000100
+#define PPC_FEATURE_HAS_VSX             0x00000080
+
+#define PPC_FEATURE_PSERIES_PERFMON_COMPAT \
+                                        0x00000040
+
+#define PPC_FEATURE_TRUE_LE             0x00000002
+#define PPC_FEATURE_PPC_LE              0x00000001
+
 /* Bits present in AT_HWCAP, primarily for Sparc32.  */
 
 #define HWCAP_SPARC_FLUSH       1    /* CPU supports flush instruction. */

tcg/ppc64/tcg-target.c

@@ -45,15 +45,10 @@ static uint8_t *tb_ret_addr;
 #define GUEST_BASE 0
 #endif
 
-#ifdef CONFIG_GETAUXVAL
-#include <sys/auxv.h>
+#include "elf.h"
 static bool have_isa_2_06;
 #define HAVE_ISA_2_06  have_isa_2_06
 #define HAVE_ISEL      have_isa_2_06
-#else
-#define HAVE_ISA_2_06  0
-#define HAVE_ISEL      0
-#endif
 
 #ifdef CONFIG_USE_GUEST_BASE
 #define TCG_GUEST_BASE_REG 30
@@ -2132,12 +2127,10 @@ static const TCGTargetOpDef ppc_op_defs[] = {
 
 static void tcg_target_init(TCGContext *s)
 {
-#ifdef CONFIG_GETAUXVAL
-    unsigned long hwcap = getauxval(AT_HWCAP);
+    unsigned long hwcap = qemu_getauxval(AT_HWCAP);
     if (hwcap & PPC_FEATURE_ARCH_2_06) {
         have_isa_2_06 = true;
     }
-#endif
 
     tcg_regset_set32(tcg_target_available_regs[TCG_TYPE_I32], 0, 0xffffffff);
     tcg_regset_set32(tcg_target_available_regs[TCG_TYPE_I64], 0, 0xffffffff);