/* * 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> /* Xtensa processor ELF architecture-magic number */ #define EM_XTENSA 94 #define EM_XTENSA_OLD 0xABC7 /* 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 { elf_greg_t pc; elf_greg_t ps; elf_greg_t lbeg; elf_greg_t lend; elf_greg_t lcount; elf_greg_t sar; elf_greg_t windowstart; elf_greg_t windowbase; elf_greg_t reserved[8+48]; elf_greg_t a[64]; } 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]; #define ELF_CORE_COPY_REGS(_eregs, _pregs) \ xtensa_elf_core_copy_regs ((xtensa_gregset_t*)&(_eregs), _pregs); extern void xtensa_elf_core_copy_regs (xtensa_gregset_t *, struct pt_regs *); /* * 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 ) ) /* * 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 USE_ELF_CORE_DUMP #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. */ #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) 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) struct task_struct; extern void do_copy_regs (xtensa_gregset_t*, struct pt_regs*, struct task_struct*); extern void do_restore_regs (xtensa_gregset_t*, struct pt_regs*, struct task_struct*); extern void do_save_fpregs (elf_fpregset_t*, struct pt_regs*, struct task_struct*); extern int do_restore_fpregs (elf_fpregset_t*, struct pt_regs*, struct task_struct*); #endif /* _XTENSA_ELF_H */