[linux-block.git] / include / linux / elf.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_ELF_H
#define _LINUX_ELF_H

#include <linux/types.h>
#include <asm/elf.h>
#include <uapi/linux/elf.h>

#ifndef elf_read_implies_exec
  /* Executables for which elf_read_implies_exec() returns TRUE will
     have the READ_IMPLIES_EXEC personality flag set automatically.
     Override in asm/elf.h as needed.  */
# define elf_read_implies_exec(ex, have_pt_gnu_stack)	0
#endif
#ifndef SET_PERSONALITY
#define SET_PERSONALITY(ex) \
	set_personality(PER_LINUX | (current->personality & (~PER_MASK)))
#endif

#ifndef SET_PERSONALITY2
#define SET_PERSONALITY2(ex, state) \
	SET_PERSONALITY(ex)
#endif

#ifndef START_THREAD
#define START_THREAD(elf_ex, regs, elf_entry, start_stack)	\
	start_thread(regs, elf_entry, start_stack)
#endif

#if defined(ARCH_HAS_SETUP_ADDITIONAL_PAGES) && !defined(ARCH_SETUP_ADDITIONAL_PAGES)
#define ARCH_SETUP_ADDITIONAL_PAGES(bprm, ex, interpreter) \
	arch_setup_additional_pages(bprm, interpreter)
#endif

#define ELF32_GNU_PROPERTY_ALIGN	4
#define ELF64_GNU_PROPERTY_ALIGN	8

#if ELF_CLASS == ELFCLASS32

extern Elf32_Dyn _DYNAMIC [];
#define elfhdr		elf32_hdr
#define elf_phdr	elf32_phdr
#define elf_shdr	elf32_shdr
#define elf_note	elf32_note
#define elf_addr_t	Elf32_Off
#define Elf_Half	Elf32_Half
#define Elf_Word	Elf32_Word
#define ELF_GNU_PROPERTY_ALIGN	ELF32_GNU_PROPERTY_ALIGN

#else

extern Elf64_Dyn _DYNAMIC [];
#define elfhdr		elf64_hdr
#define elf_phdr	elf64_phdr
#define elf_shdr	elf64_shdr
#define elf_note	elf64_note
#define elf_addr_t	Elf64_Off
#define Elf_Half	Elf64_Half
#define Elf_Word	Elf64_Word
#define ELF_GNU_PROPERTY_ALIGN	ELF64_GNU_PROPERTY_ALIGN

#endif

/* Optional callbacks to write extra ELF notes. */
struct file;
struct coredump_params;

#ifndef ARCH_HAVE_EXTRA_ELF_NOTES
static inline int elf_coredump_extra_notes_size(void) { return 0; }
static inline int elf_coredump_extra_notes_write(struct coredump_params *cprm) { return 0; }
#else
extern int elf_coredump_extra_notes_size(void);
extern int elf_coredump_extra_notes_write(struct coredump_params *cprm);
#endif

/*
 * NT_GNU_PROPERTY_TYPE_0 header:
 * Keep this internal until/unless there is an agreed UAPI definition.
 * pr_type values (GNU_PROPERTY_*) are public and defined in the UAPI header.
 */
struct gnu_property {
	u32 pr_type;
	u32 pr_datasz;
};

struct arch_elf_state;

#ifndef CONFIG_ARCH_USE_GNU_PROPERTY
static inline int arch_parse_elf_property(u32 type, const void *data,
					  size_t datasz, bool compat,
					  struct arch_elf_state *arch)
{
	return 0;
}
#else
extern int arch_parse_elf_property(u32 type, const void *data, size_t datasz,
				   bool compat, struct arch_elf_state *arch);
#endif

#ifdef CONFIG_ARCH_HAVE_ELF_PROT
int arch_elf_adjust_prot(int prot, const struct arch_elf_state *state,
			 bool has_interp, bool is_interp);
#else
static inline int arch_elf_adjust_prot(int prot,
				       const struct arch_elf_state *state,
				       bool has_interp, bool is_interp)
{
	return prot;
}
#endif

#endif /* _LINUX_ELF_H */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
1da177e4 LT	2	#ifndef _LINUX_ELF_H
	3	#define _LINUX_ELF_H
	4
db751e30	5	#include <linux/types.h>
1da177e4	6	#include <asm/elf.h>
607ca46e	7	#include <uapi/linux/elf.h>
1da177e4	8
267aed9d DH	9	#ifndef elf_read_implies_exec
	10	/* Executables for which elf_read_implies_exec() returns TRUE will
	11	have the READ_IMPLIES_EXEC personality flag set automatically.
	12	Override in asm/elf.h as needed. */
	13	# define elf_read_implies_exec(ex, have_pt_gnu_stack) 0
	14	#endif
e72837e3 AV	15	#ifndef SET_PERSONALITY
	16	#define SET_PERSONALITY(ex) \
	17	set_personality(PER_LINUX \| (current->personality & (~PER_MASK)))
	18	#endif
267aed9d	19
774c105e PB	20	#ifndef SET_PERSONALITY2
	21	#define SET_PERSONALITY2(ex, state) \
	22	SET_PERSONALITY(ex)
	23	#endif
bc3d7bf6 GKB	24
	25	#ifndef START_THREAD
	26	#define START_THREAD(elf_ex, regs, elf_entry, start_stack) \
	27	start_thread(regs, elf_entry, start_stack)
	28	#endif
9a29a671 GKB	29
	30	#if defined(ARCH_HAS_SETUP_ADDITIONAL_PAGES) && !defined(ARCH_SETUP_ADDITIONAL_PAGES)
	31	#define ARCH_SETUP_ADDITIONAL_PAGES(bprm, ex, interpreter) \
	32	arch_setup_additional_pages(bprm, interpreter)
	33	#endif
774c105e	34
00e19cee DM	35	#define ELF32_GNU_PROPERTY_ALIGN 4
	36	#define ELF64_GNU_PROPERTY_ALIGN 8
	37
1da177e4 LT	38	#if ELF_CLASS == ELFCLASS32
	39
	40	extern Elf32_Dyn _DYNAMIC [];
	41	#define elfhdr elf32_hdr
	42	#define elf_phdr elf32_phdr
8d9032bb	43	#define elf_shdr elf32_shdr
1da177e4	44	#define elf_note elf32_note
386d9a7e	45	#define elf_addr_t Elf32_Off
1fcccbac	46	#define Elf_Half Elf32_Half
51dbd925	47	#define Elf_Word Elf32_Word
00e19cee	48	#define ELF_GNU_PROPERTY_ALIGN ELF32_GNU_PROPERTY_ALIGN
1da177e4 LT	49
	50	#else
	51
	52	extern Elf64_Dyn _DYNAMIC [];
	53	#define elfhdr elf64_hdr
	54	#define elf_phdr elf64_phdr
8d9032bb	55	#define elf_shdr elf64_shdr
1da177e4	56	#define elf_note elf64_note
386d9a7e	57	#define elf_addr_t Elf64_Off
1fcccbac	58	#define Elf_Half Elf64_Half
51dbd925	59	#define Elf_Word Elf64_Word
00e19cee	60	#define ELF_GNU_PROPERTY_ALIGN ELF64_GNU_PROPERTY_ALIGN
1da177e4 LT	61
	62	#endif
	63
e5501492	64	/* Optional callbacks to write extra ELF notes. */
267aed9d	65	struct file;
cdc3d562	66	struct coredump_params;
267aed9d	67
bf1ab978	68	#ifndef ARCH_HAVE_EXTRA_ELF_NOTES
e5501492	69	static inline int elf_coredump_extra_notes_size(void) { return 0; }
cdc3d562	70	static inline int elf_coredump_extra_notes_write(struct coredump_params *cprm) { return 0; }
e5501492 ME	71	#else
e5501492 ME	72	extern int elf_coredump_extra_notes_size(void);
cdc3d562	73	extern int elf_coredump_extra_notes_write(struct coredump_params *cprm);
e5501492	74	#endif
db751e30 DM	75
	76	/*
	77	* NT_GNU_PROPERTY_TYPE_0 header:
	78	* Keep this internal until/unless there is an agreed UAPI definition.
	79	* pr_type values (GNU_PROPERTY_*) are public and defined in the UAPI header.
	80	*/
	81	struct gnu_property {
	82	u32 pr_type;
	83	u32 pr_datasz;
	84	};
	85
00e19cee DM	86	struct arch_elf_state;
	87
	88	#ifndef CONFIG_ARCH_USE_GNU_PROPERTY
	89	static inline int arch_parse_elf_property(u32 type, const void *data,
	90	size_t datasz, bool compat,
	91	struct arch_elf_state *arch)
	92	{
	93	return 0;
	94	}
	95	#else
	96	extern int arch_parse_elf_property(u32 type, const void *data, size_t datasz,
	97	bool compat, struct arch_elf_state *arch);
	98	#endif
	99
fe0f6766 DM	100	#ifdef CONFIG_ARCH_HAVE_ELF_PROT
	101	int arch_elf_adjust_prot(int prot, const struct arch_elf_state *state,
	102	bool has_interp, bool is_interp);
	103	#else
	104	static inline int arch_elf_adjust_prot(int prot,
	105	const struct arch_elf_state *state,
	106	bool has_interp, bool is_interp)
	107	{
	108	return prot;
	109	}
	110	#endif
	111
1da177e4	112	#endif /* _LINUX_ELF_H */