#include <sys/cdefs.h>
#include "opt_capsicum.h"
#include <sys/param.h>
#include <sys/capsicum.h>
#include <sys/compressor.h>
#include <sys/exec.h>
#include <sys/fcntl.h>
#include <sys/imgact.h>
#include <sys/imgact_elf.h>
#include <sys/jail.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/malloc.h>
#include <sys/mount.h>
#include <sys/mman.h>
#include <sys/namei.h>
#include <sys/proc.h>
#include <sys/procfs.h>
#include <sys/ptrace.h>
#include <sys/racct.h>
#include <sys/reg.h>
#include <sys/resourcevar.h>
#include <sys/rwlock.h>
#include <sys/sbuf.h>
#include <sys/sf_buf.h>
#include <sys/smp.h>
#include <sys/systm.h>
#include <sys/signalvar.h>
#include <sys/stat.h>
#include <sys/sx.h>
#include <sys/syscall.h>
#include <sys/sysctl.h>
#include <sys/sysent.h>
#include <sys/vnode.h>
#include <sys/syslog.h>
#include <sys/eventhandler.h>
#include <sys/user.h>
#include <vm/vm.h>
#include <vm/vm_kern.h>
#include <vm/vm_param.h>
#include <vm/pmap.h>
#include <vm/vm_map.h>
#include <vm/vm_object.h>
#include <vm/vm_extern.h>
#include <machine/elf.h>
#include <machine/md_var.h>

Include dependency graph for imgact_elf.c:

This graph shows which files directly or indirectly include this file:

Go to the source code of this file.

Data Structures
struct	phdr_closure

struct	note_info

struct	brandnote_cb_arg

struct	fctl_cb_arg

Macros
#define	ELF_NOTE_ROUNDSIZE 4

#define	OLD_EI_BRAND 8

#define	ASLR_NODE_OID __CONCAT(__CONCAT(_kern_elf, __ELF_WORD_SIZE), _aslr)

#define	aligned(a, t) (rounddown2((u_long)(a), sizeof(t)) == (u_long)(a))

#define	ET_DYN_ADDR_RAND 1

#define	elf_suword __CONCAT(suword, __ELF_WORD_SIZE)

#define	ELF_KERN_PROC_MASK 0

Typedefs
typedef void(*	segment_callback) (vm_map_entry_t, void *)

typedef prstatus_t	elf_prstatus_t

typedef prpsinfo_t	elf_prpsinfo_t

typedef prfpregset_t	elf_prfpregset_t

typedef prfpregset_t	elf_fpregset_t

typedef gregset_t	elf_gregset_t

typedef thrmisc_t	elf_thrmisc_t

typedef struct kinfo_proc	elf_kinfo_proc_t

typedef vm_offset_t	elf_ps_strings_t

Functions
	__FBSDID ("$FreeBSD$")

static int __elfN()	check_header (const Elf_Ehdr *hdr)

static Elf_Brandinfo *__elfN()	get_brandinfo (struct image_params imgp, const char interp, int32_t osrel, uint32_t fctl0)

static int __elfN()	load_file (struct proc p, const char file, u_long addr, u_long entry)

static int __elfN()	load_section (struct image_params *imgp, vm_ooffset_t offset, caddr_t vmaddr, size_t memsz, size_t filsz, vm_prot_t prot)

static int	__CONCAT (exec_, __elfN(imgact))

	SYSCTL_PROC (__CONCAT(_kern_elf, __ELF_WORD_SIZE), OID_AUTO, pie_base, CTLTYPE_ULONG\|CTLFLAG_MPSAFE\|CTLFLAG_RW, NULL, 0, sysctl_pie_base, "LU", "PIE load base without randomization")

	SYSCTL_NODE (__CONCAT(_kern_elf, __ELF_WORD_SIZE), OID_AUTO, aslr, CTLFLAG_RW\|CTLFLAG_MPSAFE, 0, "")

static int	__elfN (aslr_enabled)

	SYSCTL_INT (ASLR_NODE_OID, OID_AUTO, enable, CTLFLAG_RWTUN, &__elfN(aslr_enabled), 0, ": enable address map randomization")

static int	__elfN (pie_aslr_enabled)

	SYSCTL_INT (ASLR_NODE_OID, OID_AUTO, pie_enable, CTLFLAG_RWTUN, &__elfN(pie_aslr_enabled), 0, ": enable address map randomization for PIE binaries")

static int	__elfN (aslr_honor_sbrk)=0

	SYSCTL_INT (ASLR_NODE_OID, OID_AUTO, honor_sbrk, CTLFLAG_RW, &__elfN(aslr_honor_sbrk), 0, __XSTRING(__CONCAT(ELF, __ELF_WORD_SIZE)) ": assume sbrk is used")

static int	__elfN (aslr_stack)

	SYSCTL_INT (ASLR_NODE_OID, OID_AUTO, stack, CTLFLAG_RWTUN, &__elfN(aslr_stack), 0, ": enable stack address randomization")

static int	__elfN (sigfastblock)

	SYSCTL_INT (__CONCAT(_kern_elf, __ELF_WORD_SIZE), OID_AUTO, sigfastblock, CTLFLAG_RWTUN, &__elfN(sigfastblock), 0, "enable sigfastblock for new processes")

static bool	__elfN (allow_wx)

	SYSCTL_BOOL (__CONCAT(_kern_elf, __ELF_WORD_SIZE), OID_AUTO, allow_wx, CTLFLAG_RWTUN, &__elfN(allow_wx), 0, "Allow pages to be mapped simultaneously writable and executable")

Elf_Brandnote	__elfN (freebsd_brandnote)

static bool __elfN()	freebsd_trans_osrel (const Elf_Note note, int32_t osrel)

Elf_Brandnote	__elfN (kfreebsd_brandnote)

static bool	kfreebsd_trans_osrel (const Elf_Note note, int32_t osrel)

int __elfN()	insert_brand_entry (Elf_Brandinfo *entry)

int __elfN()	remove_brand_entry (Elf_Brandinfo *entry)

bool __elfN()	brand_inuse (Elf_Brandinfo *entry)

static bool __elfN()	phdr_in_zero_page (const Elf_Ehdr *hdr)

static int __elfN()	map_partial (vm_map_t map, vm_object_t object, vm_ooffset_t offset, vm_offset_t start, vm_offset_t end, vm_prot_t prot)

static int __elfN()	map_insert (struct image_params *imgp, vm_map_t map, vm_object_t object, vm_ooffset_t offset, vm_offset_t start, vm_offset_t end, vm_prot_t prot, int cow)

static int __elfN()	load_sections (struct image_params imgp, const Elf_Ehdr hdr, const Elf_Phdr phdr, u_long rbase, u_long base_addrp)

static int	__CONCAT (rnd_, __elfN(base))

static int __elfN()	enforce_limits (struct image_params imgp, const Elf_Ehdr hdr, const Elf_Phdr *phdr, u_long et_dyn_addr)

static int __elfN()	get_interp (struct image_params imgp, const Elf_Phdr phdr, char *interpp, bool free_interpp)

static int __elfN()	load_interp (struct image_params imgp, const Elf_Brandinfo brand_info, const char interp, u_long addr, u_long *entry)

int __elfN()	freebsd_copyout_auxargs (struct image_params *imgp, uintptr_t base)

int __elfN()	freebsd_fixup (uintptr_t stack_base, struct image_params imgp)

	TAILQ_HEAD (note_info_list, note_info)

static void	cb_put_phdr (vm_map_entry_t, void *)

static void	cb_size_segment (vm_map_entry_t, void *)

static void	each_dumpable_segment (struct thread , segment_callback, void , int)

static int __elfN()	corehdr (struct coredump_params , int, void , size_t, struct note_info_list *, size_t, int)

static void __elfN()	putnote (struct thread td, struct note_info , struct sbuf *)

static void __elfN()	note_prpsinfo (void , struct sbuf , size_t *)

static void __elfN()	note_threadmd (void , struct sbuf , size_t *)

static void __elfN()	note_thrmisc (void , struct sbuf , size_t *)

static void __elfN()	note_ptlwpinfo (void , struct sbuf , size_t *)

static void __elfN()	note_procstat_auxv (void , struct sbuf , size_t *)

static void __elfN()	note_procstat_proc (void , struct sbuf , size_t *)

static void __elfN()	note_procstat_psstrings (void , struct sbuf , size_t *)

static void	note_procstat_files (void , struct sbuf , size_t *)

static void	note_procstat_groups (void , struct sbuf , size_t *)

static void	note_procstat_osrel (void , struct sbuf , size_t *)

static void	note_procstat_rlimit (void , struct sbuf , size_t *)

static void	note_procstat_umask (void , struct sbuf , size_t *)

static void	note_procstat_vmmap (void , struct sbuf , size_t *)

static int	core_compressed_write (void base, size_t len, off_t offset, void arg)

int __elfN()	coredump (struct thread td, struct vnode vp, off_t limit, int flags)

void __elfN()	size_segments (struct thread td, struct sseg_closure seginfo, int flags)

void __elfN()	prepare_notes (struct thread td, struct note_info_list list, size_t *sizep)

void __elfN()	puthdr (struct thread td, void hdr, size_t hdrsize, int numsegs, size_t notesz, int flags)

static size_t __elfN()	register_regset_note (struct thread td, struct note_info_list list, struct regset regset, struct thread target_td)

size_t __elfN()	register_note (struct thread td, struct note_info_list list, int type, outfunc_t out, void *arg)

static size_t	append_note_data (const void src, void dst, size_t len)

size_t __elfN()	populate_note (int type, void src, void dst, size_t size, void **descp)

static bool __elfN()	get_prstatus (struct regset rs, struct thread td, void buf, size_t sizep)

static bool __elfN()	set_prstatus (struct regset rs, struct thread td, void *buf, size_t size)

static struct regset	__elfN (regset_prstatus)

	ELF_REGSET (__elfN(regset_prstatus))

static bool __elfN()	get_fpregset (struct regset rs, struct thread td, void buf, size_t sizep)

static bool __elfN()	set_fpregset (struct regset rs, struct thread td, void *buf, size_t size)

static struct regset	__elfN (regset_fpregset)

	ELF_REGSET (__elfN(regset_fpregset))

static size_t __elfN()	prepare_register_notes (struct thread td, struct note_info_list list, struct thread *target_td)

static bool __elfN()	parse_notes (struct image_params imgp, Elf_Note checknote, const char note_vendor, const Elf_Phdr pnote, bool(cb)(const Elf_Note , void , bool ), void *cb_arg)

static bool	brandnote_cb (const Elf_Note note, void arg0, bool *res)

static bool	note_fctl_cb (const Elf_Note note, void arg0, bool *res)

static bool __elfN()	check_note (struct image_params imgp, Elf_Brandnote brandnote, int32_t osrel, bool has_fctl0, uint32_t *fctl0)

static struct execsw	__elfN (execsw)

	EXEC_SET (__CONCAT(elf, __ELF_WORD_SIZE), __elfN(execsw))

static vm_prot_t __elfN()	trans_prot (Elf_Word flags)

static Elf_Word __elfN()	untrans_prot (vm_prot_t prot)

Variables
static Elf_Brandinfo *	elf_brand_list [MAX_BRANDS]

static const char	GNU_ABI_VENDOR [] = "GNU"

static int	GNU_KFREEBSD_ABI_DESC = 3

int	compress_user_cores

int	compress_user_cores_level

static Elf_Note	fctl_note

Macro Definition Documentation

◆ aligned

#define aligned	(	a,
		t
	)	(rounddown2((u_long)(a), sizeof(t)) == (u_long)(a))

Definition at line 224 of file imgact_elf.c.

◆ ASLR_NODE_OID

#define ASLR_NODE_OID __CONCAT(__CONCAT(_kern_elf, __ELF_WORD_SIZE), _aslr)

Definition at line 173 of file imgact_elf.c.

◆ ELF_KERN_PROC_MASK

#define ELF_KERN_PROC_MASK 0

Definition at line 2159 of file imgact_elf.c.

◆ ELF_NOTE_ROUNDSIZE

#define ELF_NOTE_ROUNDSIZE 4

Definition at line 86 of file imgact_elf.c.

◆ elf_suword

#define elf_suword __CONCAT(suword, __ELF_WORD_SIZE)

Definition at line 1429 of file imgact_elf.c.

◆ ET_DYN_ADDR_RAND

#define ET_DYN_ADDR_RAND 1

Definition at line 1102 of file imgact_elf.c.

◆ OLD_EI_BRAND

#define OLD_EI_BRAND 8

Definition at line 87 of file imgact_elf.c.

Typedef Documentation

◆ elf_fpregset_t

typedef prfpregset_t elf_fpregset_t

Definition at line 2156 of file imgact_elf.c.

◆ elf_gregset_t

typedef gregset_t elf_gregset_t

Definition at line 2157 of file imgact_elf.c.

◆ elf_kinfo_proc_t

typedef struct kinfo_proc elf_kinfo_proc_t

Definition at line 2160 of file imgact_elf.c.

◆ elf_prfpregset_t

typedef prfpregset_t elf_prfpregset_t

Definition at line 2155 of file imgact_elf.c.

◆ elf_prpsinfo_t

typedef prpsinfo_t elf_prpsinfo_t

Definition at line 2154 of file imgact_elf.c.

◆ elf_prstatus_t

typedef prstatus_t elf_prstatus_t

Definition at line 2153 of file imgact_elf.c.

◆ elf_ps_strings_t

typedef vm_offset_t elf_ps_strings_t

Definition at line 2161 of file imgact_elf.c.

◆ elf_thrmisc_t

typedef thrmisc_t elf_thrmisc_t

Definition at line 2158 of file imgact_elf.c.

◆ segment_callback

typedef void(* segment_callback) (vm_map_entry_t, void *)

Definition at line 1514 of file imgact_elf.c.

Function Documentation

◆ __CONCAT() [1/2]

static int __CONCAT	(	exec_	,
		__elfN(imgact)
	)

static

Definition at line 96 of file imgact_elf.c.

Referenced by __elfN().

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◆ __CONCAT() [2/2]

static int __CONCAT	(	rnd_	,
		__elfN(base)
	)

static

Definition at line 891 of file imgact_elf.c.

References res, and uprintf().

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◆ __elfN() [1/11]

static bool __elfN ( allow_wx )

static

◆ __elfN() [2/11]

static int __elfN ( aslr_enabled )

static

Referenced by __elfN(), cb_put_phdr(), check_note(), coredump(), corehdr(), freebsd_copyout_auxargs(), get_brandinfo(), load_file(), load_interp(), load_section(), load_sections(), map_insert(), note_threadmd(), prepare_notes(), and prepare_register_notes().

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◆ __elfN() [3/11]

static int __elfN ( aslr_honor_sbrk )

staticpure virtual

◆ __elfN() [4/11]

static int __elfN ( aslr_stack )

static

◆ __elfN() [5/11]

static struct execsw __elfN ( execsw )

static

References __CONCAT(), __ELF_WORD_SIZE, and __elfN().

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◆ __elfN() [6/11]

Elf_Brandnote __elfN ( freebsd_brandnote )

References __elfN(), and freebsd_trans_osrel().

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◆ __elfN() [7/11]

Elf_Brandnote __elfN ( kfreebsd_brandnote )

References GNU_ABI_VENDOR, and kfreebsd_trans_osrel().

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◆ __elfN() [8/11]

static int __elfN ( pie_aslr_enabled )

static

◆ __elfN() [9/11]

static struct regset __elfN ( regset_fpregset )

static

References __elfN(), get, get_fpregset(), and set_fpregset().

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◆ __elfN() [10/11]

static struct regset __elfN ( regset_prstatus )

static

References __elfN(), get, get_prstatus(), and set_prstatus().

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◆ __elfN() [11/11]

static int __elfN ( sigfastblock )

static

◆ __FBSDID()

__FBSDID ( "$FreeBSD$" )

◆ append_note_data()

static size_t append_note_data	(	const void *	src,
		void *	dst,
		size_t	len
	)

static

Definition at line 2028 of file imgact_elf.c.

References ELF_NOTE_ROUNDSIZE, and src.

Referenced by populate_note().

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◆ brand_inuse()

bool __elfN() brand_inuse ( Elf_Brandinfo * entry )

Definition at line 317 of file imgact_elf.c.

References allproc_lock.

◆ brandnote_cb()

static bool brandnote_cb	(	const Elf_Note *	note,
		void *	arg0,
		bool *	res
	)

static

Definition at line 2754 of file imgact_elf.c.

References brandnote_cb_arg::brandnote, brandnote_cb_arg::osrel, and res.

Referenced by check_note().

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◆ cb_put_phdr()

static void cb_put_phdr	(	vm_map_entry_t	entry,
		void *	closure
	)

static

Definition at line 1686 of file imgact_elf.c.

References __elfN(), phdr_closure::offset, phdr_closure::phdr, and untrans_prot().

Referenced by puthdr().

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◆ cb_size_segment()

static void cb_size_segment	(	vm_map_entry_t	entry,
		void *	closure
	)

static

Definition at line 1710 of file imgact_elf.c.

Referenced by size_segments().

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◆ check_header()

static int __elfN() check_header ( const Elf_Ehdr * hdr )

static

Definition at line 486 of file imgact_elf.c.

References elf_brand_list.

Referenced by load_file().

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◆ check_note()

static bool __elfN() check_note	(	struct image_params *	imgp,
		Elf_Brandnote *	brandnote,
		int32_t *	osrel,
		bool *	has_fctl0,
		uint32_t *	fctl0
	)

static

Definition at line 2806 of file imgact_elf.c.

References __elfN(), brandnote_cb_arg::brandnote, brandnote_cb(), fctl_cb_arg::fctl0, fctl_note, fctl_cb_arg::has_fctl0, note_fctl_cb(), brandnote_cb_arg::osrel, and parse_notes().

Referenced by get_brandinfo().

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◆ core_compressed_write()

static int core_compressed_write	(	void *	base,
		size_t	len,
		off_t	offset,
		void *	arg
	)

static

Definition at line 1559 of file imgact_elf.c.

References core_write().

Referenced by coredump().

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◆ coredump()

int __elfN() coredump	(	struct thread *	td,
		struct vnode *	vp,
		off_t	limit,
		int	flags
	)

Definition at line 1567 of file imgact_elf.c.

References __elfN(), compress_user_cores, compress_user_cores_level, compressor_fini(), compressor_flush(), compressor_init(), core_compressed_write(), core_output(), corehdr(), flags, free(), log(), malloc(), and size_segments().

Referenced by doadump().

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◆ corehdr()

static int __elfN() corehdr	(	struct coredump_params *	p,
		int	numsegs,
		void *	hdr,
		size_t	hdrsize,
		struct note_info_list *	notelst,
		size_t	notesz,
		int	flags
	)

static

Definition at line 1800 of file imgact_elf.c.

References __elfN(), flags, puthdr(), putnote(), sbuf_bcat(), sbuf_delete(), sbuf_drain_core_output(), sbuf_end_section(), sbuf_finish(), sbuf_new(), sbuf_set_drain(), and sbuf_start_section().

Referenced by coredump().

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◆ each_dumpable_segment()

static void each_dumpable_segment	(	struct thread *	td,
		segment_callback	func,
		void *	closure,
		int	flags
	)

static

Definition at line 1734 of file imgact_elf.c.

References flags.

Referenced by puthdr(), and size_segments().

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◆ ELF_REGSET() [1/2]

ELF_REGSET ( __elfN(regset_fpregset) )

◆ ELF_REGSET() [2/2]

ELF_REGSET ( __elfN(regset_prstatus) )

◆ enforce_limits()

static int __elfN() enforce_limits	(	struct image_params *	imgp,
		const Elf_Ehdr *	hdr,
		const Elf_Phdr *	phdr,
		u_long	et_dyn_addr
	)

static

Definition at line 921 of file imgact_elf.c.

References lim_cur_proc(), maxtsiz, and uprintf().

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◆ EXEC_SET()

EXEC_SET	(	__CONCAT(elf, __ELF_WORD_SIZE)	,
		__elfN(execsw)
	)

◆ freebsd_copyout_auxargs()

int __elfN() freebsd_copyout_auxargs	(	struct image_params *	imgp,
		uintptr_t	base
	)

Definition at line 1432 of file imgact_elf.c.

References __elfN(), free(), malloc(), and mp_ncpus.

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◆ freebsd_fixup()

int __elfN() freebsd_fixup	(	uintptr_t *	stack_base,
		struct image_params *	imgp
	)

Definition at line 1498 of file imgact_elf.c.

References elf_suword.

◆ freebsd_trans_osrel()

static bool __elfN() freebsd_trans_osrel	(	const Elf_Note *	note,
		int32_t *	osrel
	)

static

Definition at line 236 of file imgact_elf.c.

References ELF_NOTE_ROUNDSIZE.

Referenced by __elfN().

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◆ get_brandinfo()

static Elf_Brandinfo *__elfN() get_brandinfo	(	struct image_params *	imgp,
		const char *	interp,
		int32_t *	osrel,
		uint32_t *	fctl0
	)

static

Definition at line 335 of file imgact_elf.c.

References __elfN(), check_note(), elf_brand_list, and OLD_EI_BRAND.

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◆ get_fpregset()

static bool __elfN() get_fpregset	(	struct regset *	rs,
		struct thread *	td,
		void *	buf,
		size_t *	sizep
	)

static

Definition at line 2277 of file imgact_elf.c.

References buf.

Referenced by __elfN().

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◆ get_interp()

static int __elfN() get_interp	(	struct image_params *	imgp,
		const Elf_Phdr *	phdr,
		char **	interpp,
		bool *	free_interpp
	)

static

Definition at line 998 of file imgact_elf.c.

References free(), malloc(), uprintf(), and vn_rdwr().

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◆ get_prstatus()

static bool __elfN() get_prstatus	(	struct regset *	rs,
		struct thread *	td,
		void *	buf,
		size_t *	sizep
	)

static

Definition at line 2226 of file imgact_elf.c.

References buf.

Referenced by __elfN().

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◆ insert_brand_entry()

int __elfN() insert_brand_entry ( Elf_Brandinfo * entry )

Definition at line 282 of file imgact_elf.c.

References elf_brand_list, and printf().

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◆ kfreebsd_trans_osrel()

static bool kfreebsd_trans_osrel	(	const Elf_Note *	note,
		int32_t *	osrel
	)

static

Definition at line 260 of file imgact_elf.c.

References ELF_NOTE_ROUNDSIZE, and GNU_KFREEBSD_ABI_DESC.

Referenced by __elfN().

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◆ load_file()

static int __elfN() load_file	(	struct proc *	p,
		const char *	file,
		u_long *	addr,
		u_long *	entry
	)

static

Definition at line 776 of file imgact_elf.c.

References __elfN(), addr, aligned, check_header(), exec_check_permissions(), exec_map_first_page(), exec_unmap_first_page(), free(), load_sections(), malloc(), namei(), NDFREE(), phdr_in_zero_page(), and vput().

Referenced by load_interp().

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◆ load_interp()

static int __elfN() load_interp	(	struct image_params *	imgp,
		const Elf_Brandinfo *	brand_info,
		const char *	interp,
		u_long *	addr,
		u_long *	entry
	)

static

Definition at line 1064 of file imgact_elf.c.

References __elfN(), addr, free(), load_file(), malloc(), path, snprintf(), and uprintf().

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◆ load_section()

static int __elfN() load_section	(	struct image_params *	imgp,
		vm_ooffset_t	offset,
		caddr_t	vmaddr,
		size_t	memsz,
		size_t	filsz,
		vm_prot_t	prot
	)

static

Definition at line 619 of file imgact_elf.c.

References __elfN(), map_insert(), and uprintf().

Referenced by load_sections().

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◆ load_sections()

static int __elfN() load_sections	(	struct image_params *	imgp,
		const Elf_Ehdr *	hdr,
		const Elf_Phdr *	phdr,
		u_long	rbase,
		u_long *	base_addrp
	)

static

Definition at line 723 of file imgact_elf.c.

References __elfN(), load_section(), and trans_prot().

Referenced by load_file().

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◆ map_insert()

static int __elfN() map_insert	(	struct image_params *	imgp,
		vm_map_t	map,
		vm_object_t	object,
		vm_ooffset_t	offset,
		vm_offset_t	start,
		vm_offset_t	end,
		vm_prot_t	prot,
		int	cow
	)

static

Definition at line 547 of file imgact_elf.c.

References __elfN(), map_partial(), and start.

Referenced by load_section().

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◆ map_partial()

static int __elfN() map_partial	(	vm_map_t	map,
		vm_object_t	object,
		vm_ooffset_t	offset,
		vm_offset_t	start,
		vm_offset_t	end,
		vm_prot_t	prot
	)

static

Definition at line 515 of file imgact_elf.c.

References start.

Referenced by map_insert().

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◆ note_fctl_cb()

static bool note_fctl_cb	(	const Elf_Note *	note,
		void *	arg0,
		bool *	res
	)

static

Definition at line 2783 of file imgact_elf.c.

References ELF_NOTE_ROUNDSIZE, fctl_cb_arg::fctl0, fctl_cb_arg::has_fctl0, and res.

Referenced by check_note().

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◆ note_procstat_auxv()

static void __elfN() note_procstat_auxv	(	void *	arg,
		struct sbuf *	sb,
		size_t *	sizep
	)

static

Definition at line 2652 of file imgact_elf.c.

References proc_getauxv(), sbuf_bcat(), sbuf_count_drain(), sbuf_delete(), sbuf_finish(), sbuf_new(), and sbuf_set_drain().

Referenced by prepare_notes().

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◆ note_procstat_files()

static void note_procstat_files	(	void *	arg,
		struct sbuf *	sb,
		size_t *	sizep
	)

static

Definition at line 2466 of file imgact_elf.c.

References coredump_pack_fileinfo, kern_proc_filedesc_out(), sbuf_bcat(), sbuf_count_drain(), sbuf_delete(), sbuf_end_section(), sbuf_finish(), sbuf_new(), sbuf_putc(), sbuf_set_drain(), and sbuf_start_section().

Referenced by prepare_notes().

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◆ note_procstat_groups()

static void note_procstat_groups	(	void *	arg,
		struct sbuf *	sb,
		size_t *	sizep
	)

static

Definition at line 2550 of file imgact_elf.c.

References sbuf_bcat().

Referenced by prepare_notes().

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◆ note_procstat_osrel()

static void note_procstat_osrel	(	void *	arg,
		struct sbuf *	sb,
		size_t *	sizep
	)

static

Definition at line 2610 of file imgact_elf.c.

References sbuf_bcat().

Referenced by prepare_notes().

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◆ note_procstat_proc()

static void __elfN() note_procstat_proc	(	void *	arg,
		struct sbuf *	sb,
		size_t *	sizep
	)

static

Definition at line 2439 of file imgact_elf.c.

References ELF_KERN_PROC_MASK, kern_proc_out(), proctree_lock, and sbuf_bcat().

Referenced by prepare_notes().

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◆ note_procstat_psstrings()

static void __elfN() note_procstat_psstrings	(	void *	arg,
		struct sbuf *	sb,
		size_t *	sizep
	)

static

Definition at line 2628 of file imgact_elf.c.

References sbuf_bcat().

Referenced by prepare_notes().

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◆ note_procstat_rlimit()

static void note_procstat_rlimit	(	void *	arg,
		struct sbuf *	sb,
		size_t *	sizep
	)

static

Definition at line 2587 of file imgact_elf.c.

References lim_rlimit_proc(), and sbuf_bcat().

Referenced by prepare_notes().

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◆ note_procstat_umask()

static void note_procstat_umask	(	void *	arg,
		struct sbuf *	sb,
		size_t *	sizep
	)

static

Definition at line 2569 of file imgact_elf.c.

References sbuf_bcat().

Referenced by prepare_notes().

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◆ note_procstat_vmmap()

static void note_procstat_vmmap	(	void *	arg,
		struct sbuf *	sb,
		size_t *	sizep
	)

static

Definition at line 2518 of file imgact_elf.c.

References coredump_pack_vmmapinfo, kern_proc_vmmap_out(), sbuf_bcat(), sbuf_count_drain(), sbuf_delete(), sbuf_finish(), sbuf_new(), and sbuf_set_drain().

Referenced by prepare_notes().

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◆ note_prpsinfo()

static void __elfN() note_prpsinfo	(	void *	arg,
		struct sbuf *	sb,
		size_t *	sizep
	)

static

Definition at line 2165 of file imgact_elf.c.

References free(), malloc(), proc_getargv(), sbuf_bcat(), sbuf_delete(), sbuf_finish(), sbuf_len(), and sbuf_new().

Referenced by prepare_notes().

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◆ note_ptlwpinfo()

static void __elfN() note_ptlwpinfo	(	void *	arg,
		struct sbuf *	sb,
		size_t *	sizep
	)

static

Definition at line 2370 of file imgact_elf.c.

References sbuf_bcat().

Referenced by prepare_notes().

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◆ note_threadmd()

static void __elfN() note_threadmd	(	void *	arg,
		struct sbuf *	sb,
		size_t *	sizep
	)

static

Definition at line 2413 of file imgact_elf.c.

References __elfN(), buf, free(), malloc(), and sbuf_bcat().

Referenced by prepare_notes().

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◆ note_thrmisc()

static void __elfN() note_thrmisc	(	void *	arg,
		struct sbuf *	sb,
		size_t *	sizep
	)

static

Definition at line 2354 of file imgact_elf.c.

References sbuf_bcat().

Referenced by prepare_notes().

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◆ parse_notes()

static bool __elfN() parse_notes	(	struct image_params *	imgp,
		Elf_Note *	checknote,
		const char *	note_vendor,
		const Elf_Phdr *	pnote,
		bool()(const Elf_Note , void , bool )	cb,
		void *	cb_arg
	)

static

Definition at line 2681 of file imgact_elf.c.

References aligned, buf, ELF_NOTE_ROUNDSIZE, free(), malloc(), res, uprintf(), and vn_rdwr().

Referenced by check_note().

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◆ phdr_in_zero_page()

static bool __elfN() phdr_in_zero_page ( const Elf_Ehdr * hdr )

static

Definition at line 479 of file imgact_elf.c.

Referenced by load_file().

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◆ populate_note()

size_t __elfN() populate_note	(	int	type,
		void *	src,
		void *	dst,
		size_t	size,
		void **	descp
	)

Definition at line 2041 of file imgact_elf.c.

References append_note_data(), buf, ELF_NOTE_ROUNDSIZE, src, and type.

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◆ prepare_notes()

void __elfN() prepare_notes	(	struct thread *	td,
		struct note_info_list *	list,
		size_t *	sizep
	)

Definition at line 1827 of file imgact_elf.c.

References __elfN(), note_procstat_auxv(), note_procstat_files(), note_procstat_groups(), note_procstat_osrel(), note_procstat_proc(), note_procstat_psstrings(), note_procstat_rlimit(), note_procstat_umask(), note_procstat_vmmap(), note_prpsinfo(), note_ptlwpinfo(), note_threadmd(), note_thrmisc(), prepare_register_notes(), and register_note().

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◆ prepare_register_notes()

static size_t __elfN() prepare_register_notes	(	struct thread *	td,
		struct note_info_list *	list,
		struct thread *	target_td
	)

static

Definition at line 2321 of file imgact_elf.c.

References __elfN(), and register_regset_note().

Referenced by prepare_notes().

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◆ puthdr()

void __elfN() puthdr	(	struct thread *	td,
		void *	hdr,
		size_t	hdrsize,
		int	numsegs,
		size_t	notesz,
		int	flags
	)

Definition at line 1885 of file imgact_elf.c.

References cb_put_phdr(), each_dumpable_segment(), ELF_NOTE_ROUNDSIZE, flags, phdr_closure::offset, and phdr_closure::phdr.

Referenced by corehdr().

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◆ putnote()

static void __elfN() putnote	(	struct thread *	td,
		struct note_info *	ninfo,
		struct sbuf *	sb
	)

static

Definition at line 2070 of file imgact_elf.c.

References buf, ELF_NOTE_ROUNDSIZE, free(), malloc(), note_info::outarg, note_info::outfunc, note_info::outsize, note_info::regset, sbuf_bcat(), sbuf_end_section(), sbuf_putc(), sbuf_start_section(), and note_info::type.

Referenced by corehdr().

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◆ register_note()

size_t __elfN() register_note	(	struct thread *	td,
		struct note_info_list *	list,
		int	type,
		outfunc_t	out,
		void *	arg
	)

Definition at line 1999 of file imgact_elf.c.

References ELF_NOTE_ROUNDSIZE, malloc(), note_info::outarg, note_info::outfunc, note_info::outsize, type, and note_info::type.

Referenced by prepare_notes().

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◆ register_regset_note()

static size_t __elfN() register_regset_note	(	struct thread *	td,
		struct note_info_list *	list,
		struct regset *	regset,
		struct thread *	target_td
	)

static

Definition at line 1971 of file imgact_elf.c.

References ELF_NOTE_ROUNDSIZE, malloc(), note_info::outarg, note_info::outsize, note_info::regset, and note_info::type.

Referenced by prepare_register_notes().

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◆ remove_brand_entry()

int __elfN() remove_brand_entry ( Elf_Brandinfo * entry )

Definition at line 301 of file imgact_elf.c.

References elf_brand_list.

◆ set_fpregset()

static bool __elfN() set_fpregset	(	struct regset *	rs,
		struct thread *	td,
		void *	buf,
		size_t	size
	)

static

Definition at line 2297 of file imgact_elf.c.

References buf.

Referenced by __elfN().

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◆ set_prstatus()

static bool __elfN() set_prstatus	(	struct regset *	rs,
		struct thread *	td,
		void *	buf,
		size_t	size
	)

static

Definition at line 2253 of file imgact_elf.c.

References buf.

Referenced by __elfN().

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◆ size_segments()

void __elfN() size_segments	(	struct thread *	td,
		struct sseg_closure *	seginfo,
		int	flags
	)

Definition at line 1719 of file imgact_elf.c.

References cb_size_segment(), each_dumpable_segment(), and flags.

Referenced by coredump().

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◆ SYSCTL_BOOL()

SYSCTL_BOOL	(	__CONCAT(_kern_elf, __ELF_WORD_SIZE)	,
		OID_AUTO	,
		allow_wx	,
		CTLFLAG_RWTUN	,
		&	__elfNallow_wx,
		0	,
		"Allow pages to be mapped simultaneously writable and executable"
	)

◆ SYSCTL_INT() [1/5]

SYSCTL_INT	(	__CONCAT(_kern_elf, __ELF_WORD_SIZE)	,
		OID_AUTO	,
		sigfastblock	,
		CTLFLAG_RWTUN	,
		&	__elfNsigfastblock,
		0	,
		"enable sigfastblock for new processes"
	)

◆ SYSCTL_INT() [2/5]

SYSCTL_INT	(	ASLR_NODE_OID	,
		OID_AUTO	,
		enable	,
		CTLFLAG_RWTUN	,
		&	__elfNaslr_enabled,
		0	,
		": enable address map randomization"
	)

◆ SYSCTL_INT() [3/5]

SYSCTL_INT	(	ASLR_NODE_OID	,
		OID_AUTO	,
		honor_sbrk	,
		CTLFLAG_RW	,
		&	__elfNaslr_honor_sbrk,
		0	,
		__XSTRING(__CONCAT(ELF, __ELF_WORD_SIZE)) ": assume sbrk is used"
	)

◆ SYSCTL_INT() [4/5]

SYSCTL_INT	(	ASLR_NODE_OID	,
		OID_AUTO	,
		pie_enable	,
		CTLFLAG_RWTUN	,
		&	__elfNpie_aslr_enabled,
		0	,
		": enable address map randomization for PIE binaries"
	)

◆ SYSCTL_INT() [5/5]

SYSCTL_INT	(	ASLR_NODE_OID	,
		OID_AUTO	,
		stack	,
		CTLFLAG_RWTUN	,
		&	__elfNaslr_stack,
		0	,
		": enable stack address randomization"
	)

◆ SYSCTL_NODE()

SYSCTL_NODE	(	__CONCAT(_kern_elf, __ELF_WORD_SIZE)	,
		OID_AUTO	,
		aslr	,
		CTLFLAG_RW\|	CTLFLAG_MPSAFE,
		0	,
		""
	)

◆ SYSCTL_PROC()

SYSCTL_PROC	(	__CONCAT(_kern_elf, __ELF_WORD_SIZE)	,
		OID_AUTO	,
		pie_base	,
		CTLTYPE_ULONG\|CTLFLAG_MPSAFE\|	CTLFLAG_RW,
		NULL	,
		0	,
		sysctl_pie_base	,
		"LU"	,
		"PIE load base without randomization"
	)

◆ TAILQ_HEAD()

TAILQ_HEAD	(	note_info_list	,
		note_info
	)

Referenced by turnstile_unpend().

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◆ trans_prot()

static vm_prot_t __elfN() trans_prot ( Elf_Word flags )

static

Definition at line 2850 of file imgact_elf.c.

References flags.

Referenced by load_sections().

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◆ untrans_prot()

static Elf_Word __elfN() untrans_prot ( vm_prot_t prot )

static

Definition at line 2869 of file imgact_elf.c.

References flags.

Referenced by cb_put_phdr().

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Variable Documentation

◆ compress_user_cores

int compress_user_cores

extern

Definition at line 3572 of file kern_sig.c.

Referenced by coredump(), and sysctl_compress_user_cores().

◆ compress_user_cores_level

int compress_user_cores_level

extern

Definition at line 3595 of file kern_sig.c.

Referenced by coredump().

◆ elf_brand_list

Elf_Brandinfo* elf_brand_list[MAX_BRANDS]

static

Definition at line 222 of file imgact_elf.c.

Referenced by check_header(), get_brandinfo(), insert_brand_entry(), and remove_brand_entry().

◆ fctl_note

Elf_Note fctl_note

static

Initial value:

= {
        .n_namesz = sizeof(FREEBSD_ABI_VENDOR),
        .n_descsz = sizeof(uint32_t),
        .n_type = NT_FREEBSD_FEATURE_CTL,
}

Definition at line 2771 of file imgact_elf.c.

Referenced by check_note().

◆ GNU_ABI_VENDOR

const char GNU_ABI_VENDOR[] = "GNU"

static

Definition at line 247 of file imgact_elf.c.

Referenced by __elfN().

◆ GNU_KFREEBSD_ABI_DESC

int GNU_KFREEBSD_ABI_DESC = 3

static

Definition at line 248 of file imgact_elf.c.

Referenced by kfreebsd_trans_osrel().

Data Structures

Macros

Typedefs

Functions

Variables

Macro Definition Documentation

◆ aligned

◆ ASLR_NODE_OID

◆ ELF_KERN_PROC_MASK

◆ ELF_NOTE_ROUNDSIZE

◆ elf_suword

◆ ET_DYN_ADDR_RAND

◆ OLD_EI_BRAND

Typedef Documentation

◆ elf_fpregset_t

◆ elf_gregset_t

◆ elf_kinfo_proc_t

◆ elf_prfpregset_t

◆ elf_prpsinfo_t

◆ elf_prstatus_t

◆ elf_ps_strings_t

◆ elf_thrmisc_t

◆ segment_callback

Function Documentation

◆ __CONCAT() [1/2]

◆ __CONCAT() [2/2]

◆ __elfN() [1/11]

◆ __elfN() [2/11]

◆ __elfN() [3/11]

◆ __elfN() [4/11]

◆ __elfN() [5/11]

◆ __elfN() [6/11]

◆ __elfN() [7/11]

◆ __elfN() [8/11]

◆ __elfN() [9/11]

◆ __elfN() [10/11]

◆ __elfN() [11/11]

◆ __FBSDID()

◆ append_note_data()

◆ brand_inuse()

◆ brandnote_cb()

◆ cb_put_phdr()

◆ cb_size_segment()

◆ check_header()

◆ check_note()

◆ core_compressed_write()

◆ coredump()

◆ corehdr()

◆ each_dumpable_segment()

◆ ELF_REGSET() [1/2]

◆ ELF_REGSET() [2/2]

◆ enforce_limits()

◆ EXEC_SET()

◆ freebsd_copyout_auxargs()

◆ freebsd_fixup()

◆ freebsd_trans_osrel()

◆ get_brandinfo()

◆ get_fpregset()

◆ get_interp()

◆ get_prstatus()

◆ insert_brand_entry()

◆ kfreebsd_trans_osrel()

◆ load_file()

◆ load_interp()

◆ load_section()

◆ load_sections()

◆ map_insert()

◆ map_partial()

◆ note_fctl_cb()

◆ note_procstat_auxv()

◆ note_procstat_files()

◆ note_procstat_groups()

◆ note_procstat_osrel()

◆ note_procstat_proc()

◆ note_procstat_psstrings()

◆ note_procstat_rlimit()

◆ note_procstat_umask()

◆ note_procstat_vmmap()

◆ note_prpsinfo()

◆ note_ptlwpinfo()