[mirror_ubuntu-disco-kernel.git] / arch / s390 / include / asm / elf.h

/* SPDX-License-Identifier: GPL-2.0 */
/*
 *  S390 version
 *
 *  Derived from "include/asm-i386/elf.h"
 */

#ifndef __ASMS390_ELF_H
#define __ASMS390_ELF_H

/* s390 relocations defined by the ABIs */
#define R_390_NONE		0	/* No reloc.  */
#define R_390_8			1	/* Direct 8 bit.  */
#define R_390_12		2	/* Direct 12 bit.  */
#define R_390_16		3	/* Direct 16 bit.  */
#define R_390_32		4	/* Direct 32 bit.  */
#define R_390_PC32		5	/* PC relative 32 bit.	*/
#define R_390_GOT12		6	/* 12 bit GOT offset.  */
#define R_390_GOT32		7	/* 32 bit GOT offset.  */
#define R_390_PLT32		8	/* 32 bit PC relative PLT address.  */
#define R_390_COPY		9	/* Copy symbol at runtime.  */
#define R_390_GLOB_DAT		10	/* Create GOT entry.  */
#define R_390_JMP_SLOT		11	/* Create PLT entry.  */
#define R_390_RELATIVE		12	/* Adjust by program base.  */
#define R_390_GOTOFF32		13	/* 32 bit offset to GOT.	 */
#define R_390_GOTPC		14	/* 32 bit PC rel. offset to GOT.  */
#define R_390_GOT16		15	/* 16 bit GOT offset.  */
#define R_390_PC16		16	/* PC relative 16 bit.	*/
#define R_390_PC16DBL		17	/* PC relative 16 bit shifted by 1.  */
#define R_390_PLT16DBL		18	/* 16 bit PC rel. PLT shifted by 1.  */
#define R_390_PC32DBL		19	/* PC relative 32 bit shifted by 1.  */
#define R_390_PLT32DBL		20	/* 32 bit PC rel. PLT shifted by 1.  */
#define R_390_GOTPCDBL		21	/* 32 bit PC rel. GOT shifted by 1.  */
#define R_390_64		22	/* Direct 64 bit.  */
#define R_390_PC64		23	/* PC relative 64 bit.	*/
#define R_390_GOT64		24	/* 64 bit GOT offset.  */
#define R_390_PLT64		25	/* 64 bit PC relative PLT address.  */
#define R_390_GOTENT		26	/* 32 bit PC rel. to GOT entry >> 1. */
#define R_390_GOTOFF16		27	/* 16 bit offset to GOT. */
#define R_390_GOTOFF64		28	/* 64 bit offset to GOT. */
#define R_390_GOTPLT12		29	/* 12 bit offset to jump slot.	*/
#define R_390_GOTPLT16		30	/* 16 bit offset to jump slot.	*/
#define R_390_GOTPLT32		31	/* 32 bit offset to jump slot.	*/
#define R_390_GOTPLT64		32	/* 64 bit offset to jump slot.	*/
#define R_390_GOTPLTENT		33	/* 32 bit rel. offset to jump slot.  */
#define R_390_PLTOFF16		34	/* 16 bit offset from GOT to PLT. */
#define R_390_PLTOFF32		35	/* 32 bit offset from GOT to PLT. */
#define R_390_PLTOFF64		36	/* 16 bit offset from GOT to PLT. */
#define R_390_TLS_LOAD		37	/* Tag for load insn in TLS code. */
#define R_390_TLS_GDCALL	38	/* Tag for function call in general
                                           dynamic TLS code.  */
#define R_390_TLS_LDCALL	39	/* Tag for function call in local
                                           dynamic TLS code.  */
#define R_390_TLS_GD32		40	/* Direct 32 bit for general dynamic
                                           thread local data.  */
#define R_390_TLS_GD64		41	/* Direct 64 bit for general dynamic
                                           thread local data.  */
#define R_390_TLS_GOTIE12	42	/* 12 bit GOT offset for static TLS
                                           block offset.  */
#define R_390_TLS_GOTIE32	43	/* 32 bit GOT offset for static TLS
                                           block offset.  */
#define R_390_TLS_GOTIE64	44	/* 64 bit GOT offset for static TLS
                                           block offset.  */
#define R_390_TLS_LDM32		45	/* Direct 32 bit for local dynamic
                                           thread local data in LD code.  */
#define R_390_TLS_LDM64		46	/* Direct 64 bit for local dynamic
                                           thread local data in LD code.  */
#define R_390_TLS_IE32		47	/* 32 bit address of GOT entry for
                                           negated static TLS block offset.  */
#define R_390_TLS_IE64		48	/* 64 bit address of GOT entry for
                                           negated static TLS block offset.  */
#define R_390_TLS_IEENT		49	/* 32 bit rel. offset to GOT entry for
                                           negated static TLS block offset.  */
#define R_390_TLS_LE32		50	/* 32 bit negated offset relative to
                                           static TLS block.  */
#define R_390_TLS_LE64		51	/* 64 bit negated offset relative to
                                           static TLS block.  */
#define R_390_TLS_LDO32		52	/* 32 bit offset relative to TLS
                                           block.  */
#define R_390_TLS_LDO64		53	/* 64 bit offset relative to TLS
                                           block.  */
#define R_390_TLS_DTPMOD	54	/* ID of module containing symbol.  */
#define R_390_TLS_DTPOFF	55	/* Offset in TLS block.  */
#define R_390_TLS_TPOFF		56	/* Negate offset in static TLS
                                           block.  */
#define R_390_20		57	/* Direct 20 bit.  */
#define R_390_GOT20		58	/* 20 bit GOT offset.  */
#define R_390_GOTPLT20		59	/* 20 bit offset to jump slot.  */
#define R_390_TLS_GOTIE20	60	/* 20 bit GOT offset for static TLS
					   block offset.  */
/* Keep this the last entry.  */
#define R_390_NUM	61

/* 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_S390_VXRS		2048
#define HWCAP_S390_VXRS_BCD	4096
#define HWCAP_S390_VXRS_EXT	8192
#define HWCAP_S390_GS		16384
#define HWCAP_S390_VXRS_EXT2	32768
#define HWCAP_S390_VXRS_PDE	65536
#define HWCAP_S390_SORT		131072
#define HWCAP_S390_DFLT		262144

/* Internal bits, not exposed via elf */
#define HWCAP_INT_SIE		1UL

/*
 * These are used to set parameters in the core dumps.
 */
#define ELF_CLASS	ELFCLASS64
#define ELF_DATA	ELFDATA2MSB
#define ELF_ARCH	EM_S390

/* s390 specific phdr types */
#define PT_S390_PGSTE	0x70000000

/*
 * ELF register definitions..
 */

#include <linux/compat.h>

#include <asm/ptrace.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/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

struct arch_elf_state {
	int rc;
};

#define INIT_ARCH_ELF_STATE { .rc = 0 }

#define arch_check_elf(ehdr, interp, interp_ehdr, state) (0)
#ifdef CONFIG_PGSTE
#define arch_elf_pt_proc(ehdr, phdr, elf, interp, state)	\
({								\
	struct arch_elf_state *_state = state;			\
	if ((phdr)->p_type == PT_S390_PGSTE &&			\
	    !page_table_allocate_pgste &&			\
	    !test_thread_flag(TIF_PGSTE) &&			\
	    !current->mm->context.alloc_pgste) {		\
		set_thread_flag(TIF_PGSTE);			\
		set_pt_regs_flag(task_pt_regs(current),		\
				 PIF_SYSCALL_RESTART);		\
		_state->rc = -EAGAIN;				\
	}							\
	_state->rc;						\
})
#else
#define arch_elf_pt_proc(ehdr, phdr, elf, interp, state)	\
({								\
	(state)->rc;						\
})
#endif

/* For SVR4/S390 the function pointer to be registered with `atexit` is
   passed in R14. */
#define ELF_PLAT_INIT(_r, load_addr) \
	do { \
		_r->gprs[14] = 0; \
	} while (0)

#define CORE_DUMP_USE_REGSET
#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. 64-bit
   tasks are aligned to 4GB. */
#define ELF_ET_DYN_BASE (is_compat_task() ? \
				(STACK_TOP / 3 * 2) : \
				(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. */

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.

   For the moment, we have only optimizations for the Intel generations,
   but that could change... */

#define ELF_PLATFORM_SIZE 8
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.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.sys_call_table =		\
			(unsigned long)	&sys_call_table_emu;	\
	} else {						\
		clear_thread_flag(TIF_31BIT);			\
		current->thread.sys_call_table =		\
			(unsigned long) &sys_call_table;	\
	}							\
} while (0)
#endif /* CONFIG_COMPAT */

/*
 * Cache aliasing on the latest machines calls for a mapping granularity
 * of 512KB for the anonymous mapping base. 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.
 * For the additional randomization of the program break use 32MB for
 * 64-bit and 8MB for 31-bit.
 */
#define BRK_RND_MASK	(is_compat_task() ? 0x7ffUL : 0x1fffUL)
#define MMAP_RND_MASK	(is_compat_task() ? 0x7ffUL : 0x3ff80UL)
#define MMAP_ALIGN_MASK	(is_compat_task() ? 0 : 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 {									    \
	if (vdso_enabled)						    \
		NEW_AUX_ENT(AT_SYSINFO_EHDR,				    \
			    (unsigned long)current->mm->context.vdso_base); \
} while (0)

struct linux_binprm;

#define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1
int arch_setup_additional_pages(struct linux_binprm *, int);

#endif
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
1da177e4	2	/*
1da177e4 LT	3	* S390 version
	4	*
	5	* Derived from "include/asm-i386/elf.h"
	6	*/
	7
	8	#ifndef __ASMS390_ELF_H
	9	#define __ASMS390_ELF_H
	10
	11	/* s390 relocations defined by the ABIs */
	12	#define R_390_NONE 0 /* No reloc. */
	13	#define R_390_8 1 /* Direct 8 bit. */
	14	#define R_390_12 2 /* Direct 12 bit. */
	15	#define R_390_16 3 /* Direct 16 bit. */
	16	#define R_390_32 4 /* Direct 32 bit. */
	17	#define R_390_PC32 5 /* PC relative 32 bit. */
	18	#define R_390_GOT12 6 /* 12 bit GOT offset. */
	19	#define R_390_GOT32 7 /* 32 bit GOT offset. */
	20	#define R_390_PLT32 8 /* 32 bit PC relative PLT address. */
	21	#define R_390_COPY 9 /* Copy symbol at runtime. */
	22	#define R_390_GLOB_DAT 10 /* Create GOT entry. */
	23	#define R_390_JMP_SLOT 11 /* Create PLT entry. */
	24	#define R_390_RELATIVE 12 /* Adjust by program base. */
	25	#define R_390_GOTOFF32 13 /* 32 bit offset to GOT. */
	26	#define R_390_GOTPC 14 /* 32 bit PC rel. offset to GOT. */
	27	#define R_390_GOT16 15 /* 16 bit GOT offset. */
	28	#define R_390_PC16 16 /* PC relative 16 bit. */
	29	#define R_390_PC16DBL 17 /* PC relative 16 bit shifted by 1. */
	30	#define R_390_PLT16DBL 18 /* 16 bit PC rel. PLT shifted by 1. */
	31	#define R_390_PC32DBL 19 /* PC relative 32 bit shifted by 1. */
	32	#define R_390_PLT32DBL 20 /* 32 bit PC rel. PLT shifted by 1. */
	33	#define R_390_GOTPCDBL 21 /* 32 bit PC rel. GOT shifted by 1. */
	34	#define R_390_64 22 /* Direct 64 bit. */
	35	#define R_390_PC64 23 /* PC relative 64 bit. */
	36	#define R_390_GOT64 24 /* 64 bit GOT offset. */
	37	#define R_390_PLT64 25 /* 64 bit PC relative PLT address. */
	38	#define R_390_GOTENT 26 /* 32 bit PC rel. to GOT entry >> 1. */
	39	#define R_390_GOTOFF16 27 /* 16 bit offset to GOT. */
	40	#define R_390_GOTOFF64 28 /* 64 bit offset to GOT. */
	41	#define R_390_GOTPLT12 29 /* 12 bit offset to jump slot. */
	42	#define R_390_GOTPLT16 30 /* 16 bit offset to jump slot. */
	43	#define R_390_GOTPLT32 31 /* 32 bit offset to jump slot. */
	44	#define R_390_GOTPLT64 32 /* 64 bit offset to jump slot. */
	45	#define R_390_GOTPLTENT 33 /* 32 bit rel. offset to jump slot. */
	46	#define R_390_PLTOFF16 34 /* 16 bit offset from GOT to PLT. */
	47	#define R_390_PLTOFF32 35 /* 32 bit offset from GOT to PLT. */
	48	#define R_390_PLTOFF64 36 /* 16 bit offset from GOT to PLT. */
	49	#define R_390_TLS_LOAD 37 /* Tag for load insn in TLS code. */
	50	#define R_390_TLS_GDCALL 38 /* Tag for function call in general
	51	dynamic TLS code. */
	52	#define R_390_TLS_LDCALL 39 /* Tag for function call in local
	53	dynamic TLS code. */
	54	#define R_390_TLS_GD32 40 /* Direct 32 bit for general dynamic
	55	thread local data. */
	56	#define R_390_TLS_GD64 41 /* Direct 64 bit for general dynamic
	57	thread local data. */
	58	#define R_390_TLS_GOTIE12 42 /* 12 bit GOT offset for static TLS
	59	block offset. */
	60	#define R_390_TLS_GOTIE32 43 /* 32 bit GOT offset for static TLS
	61	block offset. */
	62	#define R_390_TLS_GOTIE64 44 /* 64 bit GOT offset for static TLS
	63	block offset. */
	64	#define R_390_TLS_LDM32 45 /* Direct 32 bit for local dynamic
	65	thread local data in LD code. */
	66	#define R_390_TLS_LDM64 46 /* Direct 64 bit for local dynamic
67	thread local data in LD code. */
68	#define R_390_TLS_IE32 47 /* 32 bit address of GOT entry for
69	negated static TLS block offset. */
70	#define R_390_TLS_IE64 48 /* 64 bit address of GOT entry for
71	negated static TLS block offset. */
72	#define R_390_TLS_IEENT 49 /* 32 bit rel. offset to GOT entry for
73	negated static TLS block offset. */
74	#define R_390_TLS_LE32 50 /* 32 bit negated offset relative to
75	static TLS block. */
76	#define R_390_TLS_LE64 51 /* 64 bit negated offset relative to
77	static TLS block. */
78	#define R_390_TLS_LDO32 52 /* 32 bit offset relative to TLS
79	block. */
80	#define R_390_TLS_LDO64 53 /* 64 bit offset relative to TLS
81	block. */
82	#define R_390_TLS_DTPMOD 54 /* ID of module containing symbol. */
83	#define R_390_TLS_DTPOFF 55 /* Offset in TLS block. */
84	#define R_390_TLS_TPOFF 56 /* Negate offset in static TLS
85	block. */
86	#define R_390_20 57 /* Direct 20 bit. */
87	#define R_390_GOT20 58 /* 20 bit GOT offset. */
88	#define R_390_GOTPLT20 59 /* 20 bit offset to jump slot. */
89	#define R_390_TLS_GOTIE20 60 /* 20 bit GOT offset for static TLS
90	block offset. */
91	/* Keep this the last entry. */
92	#define R_390_NUM 61
93
ea2a4d3a HC	94	/* Bits present in AT_HWCAP. */
	95	#define HWCAP_S390_ESAN3 1
	96	#define HWCAP_S390_ZARCH 2
	97	#define HWCAP_S390_STFLE 4
	98	#define HWCAP_S390_MSA 8
	99	#define HWCAP_S390_LDISP 16
	100	#define HWCAP_S390_EIMM 32
	101	#define HWCAP_S390_DFP 64
	102	#define HWCAP_S390_HPAGE 128
	103	#define HWCAP_S390_ETF3EH 256
	104	#define HWCAP_S390_HIGH_GPRS 512
d35339a4	105	#define HWCAP_S390_TE 1024
80703617	106	#define HWCAP_S390_VXRS 2048
2583b848 MS	107	#define HWCAP_S390_VXRS_BCD 4096
2583b848 MS	108	#define HWCAP_S390_VXRS_EXT 8192
916cda1a	109	#define HWCAP_S390_GS 16384
0829d0e5 MS	110	#define HWCAP_S390_VXRS_EXT2 32768
	111	#define HWCAP_S390_VXRS_PDE 65536
	112	#define HWCAP_S390_SORT 131072
	113	#define HWCAP_S390_DFLT 262144
ea2a4d3a	114
7f16d7e7 DH	115	/* Internal bits, not exposed via elf */
	116	#define HWCAP_INT_SIE 1UL
	117
1da177e4 LT	118	/*
	119	* These are used to set parameters in the core dumps.
	120	*/
1da177e4	121	#define ELF_CLASS ELFCLASS64
1da177e4 LT	122	#define ELF_DATA ELFDATA2MSB
	123	#define ELF_ARCH EM_S390
	124
23fefe11 MS	125	/* s390 specific phdr types */
	126	#define PT_S390_PGSTE 0x70000000
	127
124b51c7 DW	128	/*
	129	* ELF register definitions..
	130	*/
	131
0d55303c DD	132	#include <linux/compat.h>
0d55303c DD	133
124b51c7	134	#include <asm/ptrace.h>
61649881	135	#include <asm/syscall.h>
124b51c7 DW	136	#include <asm/user.h>
	137
	138	typedef s390_fp_regs elf_fpregset_t;
	139	typedef s390_regs elf_gregset_t;
	140
63506c41 MS	141	typedef s390_fp_regs compat_elf_fpregset_t;
	142	typedef s390_compat_regs compat_elf_gregset_t;
	143
589ee628	144	#include <linux/sched/mm.h> /* for task_struct */
146e4b3c	145	#include <asm/mmu_context.h>
124b51c7	146
b020632e MS	147	#include <asm/vdso.h>
	148
	149	extern unsigned int vdso_enabled;
	150
1da177e4 LT	151	/*
	152	* This is used to ensure we don't load something for the wrong architecture.
	153	*/
	154	#define elf_check_arch(x) \
	155	(((x)->e_machine == EM_S390 \|\| (x)->e_machine == EM_S390_OLD) \
	156	&& (x)->e_ident[EI_CLASS] == ELF_CLASS)
63506c41 MS	157	#define compat_elf_check_arch(x) \
	158	(((x)->e_machine == EM_S390 \|\| (x)->e_machine == EM_S390_OLD) \
	159	&& (x)->e_ident[EI_CLASS] == ELF_CLASS)
	160	#define compat_start_thread start_thread31
1da177e4	161
23fefe11 MS	162	struct arch_elf_state {
	163	int rc;
	164	};
	165
	166	#define INIT_ARCH_ELF_STATE { .rc = 0 }
	167
	168	#define arch_check_elf(ehdr, interp, interp_ehdr, state) (0)
	169	#ifdef CONFIG_PGSTE
	170	#define arch_elf_pt_proc(ehdr, phdr, elf, interp, state) \
	171	({ \
	172	struct arch_elf_state *_state = state; \
	173	if ((phdr)->p_type == PT_S390_PGSTE && \
	174	!page_table_allocate_pgste && \
	175	!test_thread_flag(TIF_PGSTE) && \
	176	!current->mm->context.alloc_pgste) { \
	177	set_thread_flag(TIF_PGSTE); \
	178	set_pt_regs_flag(task_pt_regs(current), \
	179	PIF_SYSCALL_RESTART); \
	180	_state->rc = -EAGAIN; \
	181	} \
	182	_state->rc; \
	183	})
	184	#else
	185	#define arch_elf_pt_proc(ehdr, phdr, elf, interp, state) \
	186	({ \
	187	(state)->rc; \
	188	})
	189	#endif
	190
1da177e4 LT	191	/* For SVR4/S390 the function pointer to be registered with `atexit` is
	192	passed in R14. */
	193	#define ELF_PLAT_INIT(_r, load_addr) \
	194	do { \
	195	_r->gprs[14] = 0; \
	196	} while (0)
	197
63506c41	198	#define CORE_DUMP_USE_REGSET
f1c1174f	199	#define ELF_EXEC_PAGESIZE PAGE_SIZE
1da177e4	200
345f8f34 MS	201	/* This is the location that an ET_DYN program is loaded if exec'ed. Typical
	202	use of this is to invoke "./ld.so someprog" to test out a new version of
	203	the loader. We need to make sure that it is out of the way of the program
	204	that it will "exec", and that there is sufficient room for the brk. 64-bit
	205	tasks are aligned to 4GB. */
	206	#define ELF_ET_DYN_BASE (is_compat_task() ? \
	207	(STACK_TOP / 3 * 2) : \
	208	(STACK_TOP / 3 * 2) & ~((1UL << 32) - 1))
1da177e4	209
1da177e4 LT	210	/* This yields a mask that user programs can use to figure out what
	211	instruction set this CPU supports. */
	212
cf8ba7a9 MS	213	extern unsigned long elf_hwcap;
cf8ba7a9 MS	214	#define ELF_HWCAP (elf_hwcap)
1da177e4	215
7f16d7e7 DH	216	/* Internal hardware capabilities, not exposed via elf */
	217
	218	extern unsigned long int_hwcap;
	219
1da177e4 LT	220	/* This yields a string that ld.so will use to load implementation
	221	specific libraries for optimization. This is more specific in
	222	intent than poking at uname or /proc/cpuinfo.
	223
	224	For the moment, we have only optimizations for the Intel generations,
	225	but that could change... */
	226
cf8ba7a9 MS	227	#define ELF_PLATFORM_SIZE 8
	228	extern char elf_platform[];
	229	#define ELF_PLATFORM (elf_platform)
1da177e4	230
61649881 MS	231	#ifndef CONFIG_COMPAT
	232	#define SET_PERSONALITY(ex) \
	233	do { \
	234	set_personality(PER_LINUX \| \
	235	(current->personality & (~PER_MASK))); \
ef280c85	236	current->thread.sys_call_table = \
61649881 MS	237	(unsigned long) &sys_call_table; \
	238	} while (0)
	239	#else /* CONFIG_COMPAT */
03e4c49f HC	240	#define SET_PERSONALITY(ex) \
	241	do { \
	242	if (personality(current->personality) != PER_LINUX32) \
f9783ec8 MS	243	set_personality(PER_LINUX \| \
f9783ec8 MS	244	(current->personality & ~PER_MASK)); \
61649881	245	if ((ex).e_ident[EI_CLASS] == ELFCLASS32) { \
03e4c49f	246	set_thread_flag(TIF_31BIT); \
ef280c85	247	current->thread.sys_call_table = \
61649881 MS	248	(unsigned long) &sys_call_table_emu; \
61649881 MS	249	} else { \
03e4c49f	250	clear_thread_flag(TIF_31BIT); \
ef280c85	251	current->thread.sys_call_table = \
61649881 MS	252	(unsigned long) &sys_call_table; \
61649881 MS	253	} \
1da177e4	254	} while (0)
61649881	255	#endif /* CONFIG_COMPAT */
1da177e4	256
c7e8b2c2 MS	257	/*
c7e8b2c2 MS	258	* Cache aliasing on the latest machines calls for a mapping granularity
95564dd5 MS	259	* of 512KB for the anonymous mapping base. For 64-bit processes use a
	260	* 512KB alignment and a randomization of up to 1GB. For 31-bit processes
	261	* the virtual address space is limited, use no alignment and limit the
	262	* randomization to 8MB.
	263	* For the additional randomization of the program break use 32MB for
	264	* 64-bit and 8MB for 31-bit.
c7e8b2c2	265	*/
95564dd5	266	#define BRK_RND_MASK (is_compat_task() ? 0x7ffUL : 0x1fffUL)
9eb31be3 HC	267	#define MMAP_RND_MASK (is_compat_task() ? 0x7ffUL : 0x3ff80UL)
9eb31be3 HC	268	#define MMAP_ALIGN_MASK (is_compat_task() ? 0 : 0x7fUL)
c7e8b2c2	269	#define STACK_RND_MASK MMAP_RND_MASK
9046e401	270
68c5cf5a	271	/* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes */
b020632e MS	272	#define ARCH_DLINFO \
	273	do { \
	274	if (vdso_enabled) \
	275	NEW_AUX_ENT(AT_SYSINFO_EHDR, \
	276	(unsigned long)current->mm->context.vdso_base); \
	277	} while (0)
	278
	279	struct linux_binprm;
	280
	281	#define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1
	282	int arch_setup_additional_pages(struct linux_binprm *, int);
	283
1da177e4	284	#endif