diff options
Diffstat (limited to 'arch/s390/include/asm/elf.h')
| -rw-r--r-- | arch/s390/include/asm/elf.h | 20 |
1 files changed, 17 insertions, 3 deletions
diff --git a/arch/s390/include/asm/elf.h b/arch/s390/include/asm/elf.h index 3ad48f22de78..08e34a5dc909 100644 --- a/arch/s390/include/asm/elf.h +++ b/arch/s390/include/asm/elf.h @@ -104,6 +104,9 @@ #define HWCAP_S390_TE 1024 #define HWCAP_S390_VXRS 2048 +/* Internal bits, not exposed via elf */ +#define HWCAP_INT_SIE 1UL + /* * These are used to set parameters in the core dumps. */ @@ -169,6 +172,10 @@ extern unsigned int vdso_enabled; extern unsigned long elf_hwcap; #define ELF_HWCAP (elf_hwcap) +/* Internal hardware capabilities, not exposed via elf */ + +extern unsigned long int_hwcap; + /* This yields a string that ld.so will use to load implementation specific libraries for optimization. This is more specific in intent than poking at uname or /proc/cpuinfo. @@ -206,9 +213,16 @@ do { \ } while (0) #endif /* CONFIG_COMPAT */ -extern unsigned long mmap_rnd_mask; - -#define STACK_RND_MASK (test_thread_flag(TIF_31BIT) ? 0x7ff : mmap_rnd_mask) +/* + * Cache aliasing on the latest machines calls for a mapping granularity + * of 512KB. For 64-bit processes use a 512KB alignment and a randomization + * of up to 1GB. For 31-bit processes the virtual address space is limited, + * use no alignment and limit the randomization to 8MB. + */ +#define BRK_RND_MASK (is_32bit_task() ? 0x7ffUL : 0x3ffffUL) +#define MMAP_RND_MASK (is_32bit_task() ? 0x7ffUL : 0x3ff80UL) +#define MMAP_ALIGN_MASK (is_32bit_task() ? 0 : 0x7fUL) +#define STACK_RND_MASK MMAP_RND_MASK #define ARCH_DLINFO \ do { \ |