184 lines
5.4 KiB
C
184 lines
5.4 KiB
C
/*
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* Copyright 2010 Tilera Corporation. All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation, version 2.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
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* NON INFRINGEMENT. See the GNU General Public License for
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* more details.
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*/
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#ifndef _ASM_TILE_ELF_H
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#define _ASM_TILE_ELF_H
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/*
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* ELF register definitions.
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*/
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#include <arch/chip.h>
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#include <linux/ptrace.h>
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#include <asm/byteorder.h>
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#include <asm/page.h>
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typedef unsigned long elf_greg_t;
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#define ELF_NGREG (sizeof(struct pt_regs) / sizeof(elf_greg_t))
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typedef elf_greg_t elf_gregset_t[ELF_NGREG];
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#define EM_TILEPRO 188
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#define EM_TILEGX 191
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/* Provide a nominal data structure. */
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#define ELF_NFPREG 0
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typedef double elf_fpreg_t;
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typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG];
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#ifdef __tilegx__
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#define ELF_CLASS ELFCLASS64
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#else
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#define ELF_CLASS ELFCLASS32
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#endif
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#ifdef __BIG_ENDIAN__
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#define ELF_DATA ELFDATA2MSB
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#else
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#define ELF_DATA ELFDATA2LSB
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#endif
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/*
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* There seems to be a bug in how compat_binfmt_elf.c works: it
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* #undefs ELF_ARCH, but it is then used in binfmt_elf.c for fill_note_info().
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* Hack around this by providing an enum value of ELF_ARCH.
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*/
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enum { ELF_ARCH = CHIP_ELF_TYPE() };
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#define ELF_ARCH ELF_ARCH
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/*
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* This is used to ensure we don't load something for the wrong architecture.
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*/
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#define elf_check_arch(x) \
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((x)->e_ident[EI_CLASS] == ELF_CLASS && \
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(x)->e_ident[EI_DATA] == ELF_DATA && \
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(x)->e_machine == CHIP_ELF_TYPE())
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/* The module loader only handles a few relocation types. */
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#ifndef __tilegx__
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#define R_TILE_32 1
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#define R_TILE_JOFFLONG_X1 15
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#define R_TILE_IMM16_X0_LO 25
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#define R_TILE_IMM16_X1_LO 26
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#define R_TILE_IMM16_X0_HA 29
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#define R_TILE_IMM16_X1_HA 30
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#else
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#define R_TILEGX_64 1
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#define R_TILEGX_JUMPOFF_X1 21
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#define R_TILEGX_IMM16_X0_HW0 36
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#define R_TILEGX_IMM16_X1_HW0 37
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#define R_TILEGX_IMM16_X0_HW1 38
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#define R_TILEGX_IMM16_X1_HW1 39
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#define R_TILEGX_IMM16_X0_HW2_LAST 48
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#define R_TILEGX_IMM16_X1_HW2_LAST 49
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#endif
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/* Use standard page size for core dumps. */
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#define ELF_EXEC_PAGESIZE PAGE_SIZE
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/*
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* This is the location that an ET_DYN program is loaded if exec'ed. Typical
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* use of this is to invoke "./ld.so someprog" to test out a new version of
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* the loader. We need to make sure that it is out of the way of the program
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* that it will "exec", and that there is sufficient room for the brk.
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*/
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#define ELF_ET_DYN_BASE (TASK_SIZE / 3 * 2)
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#define ELF_CORE_COPY_REGS(_dest, _regs) \
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memcpy((char *) &_dest, (char *) _regs, \
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sizeof(struct pt_regs));
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/* No additional FP registers to copy. */
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#define ELF_CORE_COPY_FPREGS(t, fpu) 0
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/*
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* This yields a mask that user programs can use to figure out what
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* instruction set this CPU supports. This could be done in user space,
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* but it's not easy, and we've already done it here.
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*/
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#define ELF_HWCAP (0)
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/*
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* This yields a string that ld.so will use to load implementation
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* specific libraries for optimization. This is more specific in
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* intent than poking at uname or /proc/cpuinfo.
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*/
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#define ELF_PLATFORM (NULL)
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extern void elf_plat_init(struct pt_regs *regs, unsigned long load_addr);
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#define ELF_PLAT_INIT(_r, load_addr) elf_plat_init(_r, load_addr)
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extern int dump_task_regs(struct task_struct *, elf_gregset_t *);
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#define ELF_CORE_COPY_TASK_REGS(tsk, elf_regs) dump_task_regs(tsk, elf_regs)
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/* Tilera Linux has no personalities currently, so no need to do anything. */
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#define SET_PERSONALITY(ex) do { } while (0)
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#define ARCH_HAS_SETUP_ADDITIONAL_PAGES
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/* Support auto-mapping of the user interrupt vectors. */
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struct linux_binprm;
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extern int arch_setup_additional_pages(struct linux_binprm *bprm,
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int executable_stack);
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#define ARCH_DLINFO \
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do { \
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NEW_AUX_ENT(AT_SYSINFO_EHDR, VDSO_BASE); \
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} while (0)
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struct mm_struct;
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extern unsigned long arch_randomize_brk(struct mm_struct *mm);
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#define arch_randomize_brk arch_randomize_brk
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#ifdef CONFIG_COMPAT
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#define COMPAT_ELF_PLATFORM "tilegx-m32"
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/*
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* "Compat" binaries have the same machine type, but 32-bit class,
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* since they're not a separate machine type, but just a 32-bit
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* variant of the standard 64-bit architecture.
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*/
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#define compat_elf_check_arch(x) \
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((x)->e_ident[EI_CLASS] == ELFCLASS32 && \
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(x)->e_machine == CHIP_ELF_TYPE())
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#define compat_start_thread(regs, ip, usp) do { \
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regs->pc = ptr_to_compat_reg((void *)(ip)); \
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regs->sp = ptr_to_compat_reg((void *)(usp)); \
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single_step_execve(); \
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} while (0)
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/*
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* Use SET_PERSONALITY to indicate compatibility via TS_COMPAT.
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*/
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#undef SET_PERSONALITY
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#define SET_PERSONALITY(ex) \
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do { \
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set_personality(PER_LINUX | (current->personality & (~PER_MASK))); \
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current_thread_info()->status &= ~TS_COMPAT; \
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} while (0)
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#define COMPAT_SET_PERSONALITY(ex) \
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do { \
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set_personality(PER_LINUX | (current->personality & (~PER_MASK))); \
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current_thread_info()->status |= TS_COMPAT; \
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} while (0)
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#define COMPAT_ELF_ET_DYN_BASE (0xffffffff / 3 * 2)
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#endif /* CONFIG_COMPAT */
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#define CORE_DUMP_USE_REGSET
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#endif /* _ASM_TILE_ELF_H */
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