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Diffstat (limited to 'arch/s390/include/asm/elf.h')
-rw-r--r--arch/s390/include/asm/elf.h145
1 files changed, 80 insertions, 65 deletions
diff --git a/arch/s390/include/asm/elf.h b/arch/s390/include/asm/elf.h
index 78f4f8711d58..bb63fa4d20bb 100644
--- a/arch/s390/include/asm/elf.h
+++ b/arch/s390/include/asm/elf.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
/*
* S390 version
*
@@ -90,27 +91,70 @@
/* Keep this the last entry. */
#define R_390_NUM 61
+/*
+ * HWCAP flags - for AT_HWCAP
+ *
+ * Bits 32-63 are reserved for use by libc.
+ * Bit 31 is reserved and will be used by libc to determine if a second
+ * argument is passed to IFUNC resolvers. This will be implemented when
+ * there is a need for AT_HWCAP2.
+ */
+enum {
+ HWCAP_NR_ESAN3 = 0,
+ HWCAP_NR_ZARCH = 1,
+ HWCAP_NR_STFLE = 2,
+ HWCAP_NR_MSA = 3,
+ HWCAP_NR_LDISP = 4,
+ HWCAP_NR_EIMM = 5,
+ HWCAP_NR_DFP = 6,
+ HWCAP_NR_HPAGE = 7,
+ HWCAP_NR_ETF3EH = 8,
+ HWCAP_NR_HIGH_GPRS = 9,
+ HWCAP_NR_TE = 10,
+ HWCAP_NR_VXRS = 11,
+ HWCAP_NR_VXRS_BCD = 12,
+ HWCAP_NR_VXRS_EXT = 13,
+ HWCAP_NR_GS = 14,
+ HWCAP_NR_VXRS_EXT2 = 15,
+ HWCAP_NR_VXRS_PDE = 16,
+ HWCAP_NR_SORT = 17,
+ HWCAP_NR_DFLT = 18,
+ HWCAP_NR_VXRS_PDE2 = 19,
+ HWCAP_NR_NNPA = 20,
+ HWCAP_NR_PCI_MIO = 21,
+ HWCAP_NR_SIE = 22,
+ HWCAP_NR_MAX
+};
+
/* Bits present in AT_HWCAP. */
-#define HWCAP_S390_ESAN3 1
-#define HWCAP_S390_ZARCH 2
-#define HWCAP_S390_STFLE 4
-#define HWCAP_S390_MSA 8
-#define HWCAP_S390_LDISP 16
-#define HWCAP_S390_EIMM 32
-#define HWCAP_S390_DFP 64
-#define HWCAP_S390_HPAGE 128
-#define HWCAP_S390_ETF3EH 256
-#define HWCAP_S390_HIGH_GPRS 512
-#define HWCAP_S390_TE 1024
+#define HWCAP_ESAN3 BIT(HWCAP_NR_ESAN3)
+#define HWCAP_ZARCH BIT(HWCAP_NR_ZARCH)
+#define HWCAP_STFLE BIT(HWCAP_NR_STFLE)
+#define HWCAP_MSA BIT(HWCAP_NR_MSA)
+#define HWCAP_LDISP BIT(HWCAP_NR_LDISP)
+#define HWCAP_EIMM BIT(HWCAP_NR_EIMM)
+#define HWCAP_DFP BIT(HWCAP_NR_DFP)
+#define HWCAP_HPAGE BIT(HWCAP_NR_HPAGE)
+#define HWCAP_ETF3EH BIT(HWCAP_NR_ETF3EH)
+#define HWCAP_HIGH_GPRS BIT(HWCAP_NR_HIGH_GPRS)
+#define HWCAP_TE BIT(HWCAP_NR_TE)
+#define HWCAP_VXRS BIT(HWCAP_NR_VXRS)
+#define HWCAP_VXRS_BCD BIT(HWCAP_NR_VXRS_BCD)
+#define HWCAP_VXRS_EXT BIT(HWCAP_NR_VXRS_EXT)
+#define HWCAP_GS BIT(HWCAP_NR_GS)
+#define HWCAP_VXRS_EXT2 BIT(HWCAP_NR_VXRS_EXT2)
+#define HWCAP_VXRS_PDE BIT(HWCAP_NR_VXRS_PDE)
+#define HWCAP_SORT BIT(HWCAP_NR_SORT)
+#define HWCAP_DFLT BIT(HWCAP_NR_DFLT)
+#define HWCAP_VXRS_PDE2 BIT(HWCAP_NR_VXRS_PDE2)
+#define HWCAP_NNPA BIT(HWCAP_NR_NNPA)
+#define HWCAP_PCI_MIO BIT(HWCAP_NR_PCI_MIO)
+#define HWCAP_SIE BIT(HWCAP_NR_SIE)
/*
* These are used to set parameters in the core dumps.
*/
-#ifndef CONFIG_64BIT
-#define ELF_CLASS ELFCLASS32
-#else /* CONFIG_64BIT */
#define ELF_CLASS ELFCLASS64
-#endif /* CONFIG_64BIT */
#define ELF_DATA ELFDATA2MSB
#define ELF_ARCH EM_S390
@@ -119,33 +163,21 @@
*/
#include <asm/ptrace.h>
-#include <asm/compat.h>
#include <asm/syscall.h>
#include <asm/user.h>
typedef s390_fp_regs elf_fpregset_t;
typedef s390_regs elf_gregset_t;
-typedef s390_fp_regs compat_elf_fpregset_t;
-typedef s390_compat_regs compat_elf_gregset_t;
-
-#include <linux/sched.h> /* for task_struct */
+#include <linux/sched/mm.h> /* for task_struct */
#include <asm/mmu_context.h>
-#include <asm/vdso.h>
-
-extern unsigned int vdso_enabled;
-
/*
* This is used to ensure we don't load something for the wrong architecture.
*/
#define elf_check_arch(x) \
(((x)->e_machine == EM_S390 || (x)->e_machine == EM_S390_OLD) \
&& (x)->e_ident[EI_CLASS] == ELF_CLASS)
-#define compat_elf_check_arch(x) \
- (((x)->e_machine == EM_S390 || (x)->e_machine == EM_S390_OLD) \
- && (x)->e_ident[EI_CLASS] == ELF_CLASS)
-#define compat_start_thread start_thread31
/* For SVR4/S390 the function pointer to be registered with `atexit` is
passed in R14. */
@@ -155,15 +187,14 @@ extern unsigned int vdso_enabled;
} while (0)
#define CORE_DUMP_USE_REGSET
-#define ELF_EXEC_PAGESIZE 4096
+#define ELF_EXEC_PAGESIZE PAGE_SIZE
/* This is the location that an ET_DYN program is loaded if exec'ed. Typical
use of this is to invoke "./ld.so someprog" to test out a new version of
the loader. We need to make sure that it is out of the way of the program
- that it will "exec", and that there is sufficient room for the brk. */
-
-extern unsigned long randomize_et_dyn(unsigned long base);
-#define ELF_ET_DYN_BASE (randomize_et_dyn(STACK_TOP / 3 * 2))
+ that it will "exec", and that there is sufficient room for the brk. 64-bit
+ tasks are aligned to 4GB. */
+#define ELF_ET_DYN_BASE ((STACK_TOP / 3 * 2) & ~((1UL << 32) - 1))
/* This yields a mask that user programs can use to figure out what
instruction set this CPU supports. */
@@ -182,39 +213,28 @@ extern unsigned long elf_hwcap;
extern char elf_platform[];
#define ELF_PLATFORM (elf_platform)
-#ifndef CONFIG_COMPAT
#define SET_PERSONALITY(ex) \
do { \
set_personality(PER_LINUX | \
(current->personality & (~PER_MASK))); \
- current_thread_info()->sys_call_table = \
- (unsigned long) &sys_call_table; \
-} while (0)
-#else /* CONFIG_COMPAT */
-#define SET_PERSONALITY(ex) \
-do { \
- if (personality(current->personality) != PER_LINUX32) \
- set_personality(PER_LINUX | \
- (current->personality & ~PER_MASK)); \
- if ((ex).e_ident[EI_CLASS] == ELFCLASS32) { \
- set_thread_flag(TIF_31BIT); \
- current_thread_info()->sys_call_table = \
- (unsigned long) &sys_call_table_emu; \
- } else { \
- clear_thread_flag(TIF_31BIT); \
- current_thread_info()->sys_call_table = \
- (unsigned long) &sys_call_table; \
- } \
} while (0)
-#endif /* CONFIG_COMPAT */
-
-#define STACK_RND_MASK 0x7ffUL
-#define ARCH_DLINFO \
-do { \
- if (vdso_enabled) \
- NEW_AUX_ENT(AT_SYSINFO_EHDR, \
- (unsigned long)current->mm->context.vdso_base); \
+/*
+ * Cache aliasing on the latest machines calls for a mapping granularity
+ * of 512KB for the anonymous mapping base. Use a 512KB alignment and a
+ * randomization of up to 1GB.
+ * For the additional randomization of the program break use 32MB.
+ */
+#define BRK_RND_MASK (0x1fffUL)
+#define MMAP_RND_MASK (0x3ff80UL)
+#define MMAP_ALIGN_MASK (0x7fUL)
+#define STACK_RND_MASK MMAP_RND_MASK
+
+/* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes */
+#define ARCH_DLINFO \
+do { \
+ NEW_AUX_ENT(AT_SYSINFO_EHDR, \
+ (unsigned long)current->mm->context.vdso_base); \
} while (0)
struct linux_binprm;
@@ -222,9 +242,4 @@ struct linux_binprm;
#define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1
int arch_setup_additional_pages(struct linux_binprm *, int);
-extern unsigned long arch_randomize_brk(struct mm_struct *mm);
-#define arch_randomize_brk arch_randomize_brk
-
-void *fill_cpu_elf_notes(void *ptr, struct save_area *sa);
-
#endif
generated by cgit (git 2.34.1) at 2025-12-25 08:13:43 +0000