/*
* include / asm - xtensa / elf . h
*
* ELF register definitions
*
* This file is subject to the terms and conditions of the GNU General Public
* License . See the file " COPYING " in the main directory of this archive
* for more details .
*
* Copyright ( C ) 2001 - 2005 Tensilica Inc .
*/
#ifndef _XTENSA_ELF_H
#define _XTENSA_ELF_H
#include <asm /ptrace.h>
#include <asm /coprocessor.h>
#include <linux/elf-em.h>
/* Xtensa processor ELF architecture-magic number */
#define EM_XTENSA_OLD 0 xABC7
/* Xtensa relocations defined by the ABIs */
#define R_XTENSA_NONE 0
#define R_XTENSA_32 1
#define R_XTENSA_RTLD 2
#define R_XTENSA_GLOB_DAT 3
#define R_XTENSA_JMP_SLOT 4
#define R_XTENSA_RELATIVE 5
#define R_XTENSA_PLT 6
#define R_XTENSA_OP0 8
#define R_XTENSA_OP1 9
#define R_XTENSA_OP2 10
#define R_XTENSA_ASM_EXPAND 11
#define R_XTENSA_ASM_SIMPLIFY 12
#define R_XTENSA_GNU_VTINHERIT 15
#define R_XTENSA_GNU_VTENTRY 16
#define R_XTENSA_DIFF8 17
#define R_XTENSA_DIFF16 18
#define R_XTENSA_DIFF32 19
#define R_XTENSA_SLOT0_OP 20
#define R_XTENSA_SLOT1_OP 21
#define R_XTENSA_SLOT2_OP 22
#define R_XTENSA_SLOT3_OP 23
#define R_XTENSA_SLOT4_OP 24
#define R_XTENSA_SLOT5_OP 25
#define R_XTENSA_SLOT6_OP 26
#define R_XTENSA_SLOT7_OP 27
#define R_XTENSA_SLOT8_OP 28
#define R_XTENSA_SLOT9_OP 29
#define R_XTENSA_SLOT10_OP 30
#define R_XTENSA_SLOT11_OP 31
#define R_XTENSA_SLOT12_OP 32
#define R_XTENSA_SLOT13_OP 33
#define R_XTENSA_SLOT14_OP 34
#define R_XTENSA_SLOT0_ALT 35
#define R_XTENSA_SLOT1_ALT 36
#define R_XTENSA_SLOT2_ALT 37
#define R_XTENSA_SLOT3_ALT 38
#define R_XTENSA_SLOT4_ALT 39
#define R_XTENSA_SLOT5_ALT 40
#define R_XTENSA_SLOT6_ALT 41
#define R_XTENSA_SLOT7_ALT 42
#define R_XTENSA_SLOT8_ALT 43
#define R_XTENSA_SLOT9_ALT 44
#define R_XTENSA_SLOT10_ALT 45
#define R_XTENSA_SLOT11_ALT 46
#define R_XTENSA_SLOT12_ALT 47
#define R_XTENSA_SLOT13_ALT 48
#define R_XTENSA_SLOT14_ALT 49
/* ELF register definitions. This is needed for core dump support. */
typedef unsigned long elf_greg_t;
typedef struct user_pt_regs xtensa_gregset_t;
#define ELF_NGREG (sizeof (xtensa_gregset_t) / sizeof (elf_greg_t))
typedef elf_greg_t elf_gregset_t[ELF_NGREG];
#define ELF_NFPREG 18
typedef unsigned int elf_fpreg_t;
typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG];
/*
* This is used to ensure we don ' t load something for the wrong architecture .
*/
#define elf_check_arch(x) ( ( (x)->e_machine == EM_XTENSA ) || \
( (x)->e_machine == EM_XTENSA_OLD ) )
#define ELFOSABI_XTENSA_FDPIC 65
#define elf_check_fdpic(x) ((x)->e_ident[EI_OSABI] == ELFOSABI_XTENSA_FDPIC)
#define ELF_FDPIC_CORE_EFLAGS 0
/*
* These are used to set parameters in the core dumps .
*/
#ifdef __XTENSA_EL__
# define ELF_DATA ELFDATA2LSB
#elif defined (__XTENSA_EB__)
# define ELF_DATA ELFDATA2MSB
#else
# error processor byte order undefined!
#endif
#define ELF_CLASS ELFCLASS32
#define ELF_ARCH EM_XTENSA
#define ELF_EXEC_PAGESIZE PAGE_SIZE
#define CORE_DUMP_USE_REGSET
/*
* 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 .
*/
#define ELF_ET_DYN_BASE (2 * TASK_SIZE / 3 )
/*
* This yields a mask that user programs can use to figure out what
* instruction set this CPU supports . This could be done in user space ,
* but it ' s not easy , and we ' ve already done it here .
*/
#define ELF_HWCAP (0 )
/*
* 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 (NULL)
/*
* The Xtensa processor ABI says that when the program starts , a2
* contains a pointer to a function which might be registered using
* ` atexit ' . This provides a mean for the dynamic linker to call
* DT_FINI functions for shared libraries that have been loaded before
* the code runs .
*
* A value of 0 tells we have no such handler .
*
* We might as well make sure everything else is cleared too ( except
* for the stack pointer in a1 ) , just to make things more
* deterministic . Also , clearing a0 terminates debugger backtraces .
*/
#define ELF_PLAT_INIT(_r, load_addr) \
do { \
(_r)->areg[0 ] = 0 ; /*(_r)->areg[1] = 0;*/ \
(_r)->areg[2 ] = 0 ; (_r)->areg[3 ] = 0 ; \
(_r)->areg[4 ] = 0 ; (_r)->areg[5 ] = 0 ; \
(_r)->areg[6 ] = 0 ; (_r)->areg[7 ] = 0 ; \
(_r)->areg[8 ] = 0 ; (_r)->areg[9 ] = 0 ; \
(_r)->areg[10 ] = 0 ; (_r)->areg[11 ] = 0 ; \
(_r)->areg[12 ] = 0 ; (_r)->areg[13 ] = 0 ; \
(_r)->areg[14 ] = 0 ; (_r)->areg[15 ] = 0 ; \
} while (0 )
#define ELF_FDPIC_PLAT_INIT(_r, _exec_map_addr, _interp_map_addr, dynamic_addr) \
do { \
(_r)->areg[4 ] = _exec_map_addr; \
(_r)->areg[5 ] = _interp_map_addr; \
(_r)->areg[6 ] = dynamic_addr; \
} while (0 )
typedef struct {
xtregs_opt_t opt;
xtregs_user_t user;
#if XTENSA_HAVE_COPROCESSORS
xtregs_cp0_t cp0;
xtregs_cp1_t cp1;
xtregs_cp2_t cp2;
xtregs_cp3_t cp3;
xtregs_cp4_t cp4;
xtregs_cp5_t cp5;
xtregs_cp6_t cp6;
xtregs_cp7_t cp7;
#endif
} elf_xtregs_t;
#define SET_PERSONALITY(ex) \
set_personality(PER_LINUX_32BIT | (current->personality & (~PER_MASK)))
#endif /* _XTENSA_ELF_H */
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