/* * Copyright 2010 Tilera Corporation. All Rights Reserved. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation, version 2. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or * NON INFRINGEMENT. See the GNU General Public License for * more details. */ #ifndef _ASM_TILE_ELF_H #define _ASM_TILE_ELF_H /* * ELF register definitions. */ #include <arch/chip.h> #include <linux/ptrace.h> #include <asm/byteorder.h> #include <asm/page.h> typedef unsigned long elf_greg_t; #define ELF_NGREG (sizeof(struct pt_regs) / sizeof(elf_greg_t)) typedef elf_greg_t elf_gregset_t[ELF_NGREG]; #define EM_TILE64 187 #define EM_TILEPRO 188 #define EM_TILEGX 191 /* Provide a nominal data structure. */ #define ELF_NFPREG 0 typedef double elf_fpreg_t; typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG]; #ifdef __tilegx__ #define ELF_CLASS ELFCLASS64 #else #define ELF_CLASS ELFCLASS32 #endif #define ELF_DATA ELFDATA2LSB /* * There seems to be a bug in how compat_binfmt_elf.c works: it * #undefs ELF_ARCH, but it is then used in binfmt_elf.c for fill_note_info(). * Hack around this by providing an enum value of ELF_ARCH. */ enum { ELF_ARCH = CHIP_ELF_TYPE() }; #define ELF_ARCH ELF_ARCH /* * This is used to ensure we don't load something for the wrong architecture. */ #define elf_check_arch(x) \ ((x)->e_ident[EI_CLASS] == ELF_CLASS && \ (x)->e_machine == CHIP_ELF_TYPE()) /* The module loader only handles a few relocation types. */ #ifndef __tilegx__ #define R_TILE_32 1 #define R_TILE_JOFFLONG_X1 15 #define R_TILE_IMM16_X0_LO 25 #define R_TILE_IMM16_X1_LO 26 #define R_TILE_IMM16_X0_HA 29 #define R_TILE_IMM16_X1_HA 30 #else #define R_TILEGX_64 1 #define R_TILEGX_JUMPOFF_X1 21 #define R_TILEGX_IMM16_X0_HW0 36 #define R_TILEGX_IMM16_X1_HW0 37 #define R_TILEGX_IMM16_X0_HW1 38 #define R_TILEGX_IMM16_X1_HW1 39 #define R_TILEGX_IMM16_X0_HW2_LAST 48 #define R_TILEGX_IMM16_X1_HW2_LAST 49 #endif /* Use standard page size for core dumps. */ #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 (TASK_SIZE / 3 * 2) #define ELF_CORE_COPY_REGS(_dest, _regs) \ memcpy((char *) &_dest, (char *) _regs, \ sizeof(struct pt_regs)); /* No additional FP registers to copy. */ #define ELF_CORE_COPY_FPREGS(t, fpu) 0 /* * 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. */ #define ELF_PLATFORM (NULL) extern void elf_plat_init(struct pt_regs *regs, unsigned long load_addr); #define ELF_PLAT_INIT(_r, load_addr) elf_plat_init(_r, load_addr) extern int dump_task_regs(struct task_struct *, elf_gregset_t *); #define ELF_CORE_COPY_TASK_REGS(tsk, elf_regs) dump_task_regs(tsk, elf_regs) /* Tilera Linux has no personalities currently, so no need to do anything. */ #define SET_PERSONALITY(ex) do { } while (0) #define ARCH_HAS_SETUP_ADDITIONAL_PAGES /* Support auto-mapping of the user interrupt vectors. */ struct linux_binprm; extern int arch_setup_additional_pages(struct linux_binprm *bprm, int executable_stack); #ifdef CONFIG_COMPAT #define COMPAT_ELF_PLATFORM "tilegx-m32" /* * "Compat" binaries have the same machine type, but 32-bit class, * since they're not a separate machine type, but just a 32-bit * variant of the standard 64-bit architecture. */ #define compat_elf_check_arch(x) \ ((x)->e_ident[EI_CLASS] == ELFCLASS32 && \ (x)->e_machine == CHIP_ELF_TYPE()) #define compat_start_thread(regs, ip, usp) do { \ regs->pc = ptr_to_compat_reg((void *)(ip)); \ regs->sp = ptr_to_compat_reg((void *)(usp)); \ } while (0) /* * Use SET_PERSONALITY to indicate compatibility via TS_COMPAT. */ #undef SET_PERSONALITY #define SET_PERSONALITY(ex) \ do { \ current->personality = PER_LINUX; \ current_thread_info()->status &= ~TS_COMPAT; \ } while (0) #define COMPAT_SET_PERSONALITY(ex) \ do { \ current->personality = PER_LINUX_32BIT; \ current_thread_info()->status |= TS_COMPAT; \ } while (0) #define COMPAT_ELF_ET_DYN_BASE (0xffffffff / 3 * 2) #endif /* CONFIG_COMPAT */ #endif /* _ASM_TILE_ELF_H */