Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760004AbZCRVtA (ORCPT ); Wed, 18 Mar 2009 17:49:00 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757118AbZCRVm6 (ORCPT ); Wed, 18 Mar 2009 17:42:58 -0400 Received: from 178-47-31-89.wifiinternet.cz ([89.31.47.178]:54475 "EHLO monstr.eu" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1754717AbZCRVmz (ORCPT ); Wed, 18 Mar 2009 17:42:55 -0400 From: monstr@monstr.eu To: linux-kernel@vger.kernel.org Cc: john.williams@petalogix.com, Michal Simek Subject: [PATCH 36/57] microblaze_v7: headers for executables format FLAT, ELF Date: Wed, 18 Mar 2009 21:31:03 +0100 Message-Id: X-Mailer: git-send-email 1.5.5.1 In-Reply-To: References: <1237408284-8674-1-git-send-email-monstr@monstr.eu> <0168f03c96e9479ede695a9859c8a0691baa8ef3.1237407249.git.monstr@monstr.eu> <4b5aee01d11fc790c7842838ea63a82ee3273003.1237407249.git.monstr@monstr.eu> <5f8b2a60496983f572ef6d3b4e2f986c167a8336.1237407249.git.monstr@monstr.eu> <20fd42a1e8837c7352d35d157aa3393e88152c32.1237407249.git.monstr@monstr.eu> <2f48efc353c11dfdfc7b052bdfe052b71c09ab23.1237407249.git.monstr@monstr.eu> <58cf06c85e07477170677b72ce3437af10476bec.1237407249.git.monstr@monstr.eu> <20227d6f2615060d6560785090513e251cbe2654.1237407249.git.monstr@monstr.eu> <69ef4f976d86c870a97fbe4974c242c74acc477d.1237407249.git.monstr@monstr.eu> <1477ec41e7ba0ec847a064e1f8e422dc2a5dcc9f.1237407249.git.monstr@monstr.eu> <75127eae09c978220d452d92f95763dde24f1d52.1237407249.git.monstr@monstr.eu> <644f08d7f8cd338e606ed703e221914f75588fb5.1237407249.git.monstr@monstr.eu> <6d19f608a4ba3e7718aa55794c2845f19b5ed5e2.1237407249.git.monstr@monstr.eu> <039bc2fea33d23a3e7d2d85ac6fb275b8d21b5ed.1237407249.git.monstr@monstr.eu> <513d4067a84be1ecb47577e1edf131d2b3572808.1237407249.git.monstr@monstr.eu> <5c66d0329884feb553ae745584f6db589a892eb1.1237407249.git.monstr@monstr.eu> <72b06b8fa7b051005ebfa5c23c53a40d6a27f94a.1237407249.git.monstr@monstr.eu> <99fdae6e9b1da3ae5e2d3ebc841d1afdc694dfae.1237407249.git.monstr@monstr.eu> <29d86e7cd1124e596c9dde627f397ca98dccf572.1237407249.git.monstr@monstr.eu> <827e2a6a349e009f6c98f31178ce84042b0e2e10.1237407249.git.monstr@monstr.eu> <6eb167a9a027d644f10b843b8b1bde66e4c2ee25.1237407249.git.monstr@monstr.eu> <592d2a1c72581b6abf73841e640e7b7306c3ec3b.1237407249.git.monstr@monstr.eu> In-Reply-To: <0168f03c96e9479ede695a9859c8a0691baa8ef3.1237407249.git.monstr@monstr.eu> References: <0168f03c96e9479ede695a9859c8a0691baa8ef3.1237407249.git.monstr@monstr.eu> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4396 Lines: 151 From: Michal Simek Signed-off-by: Michal Simek --- arch/microblaze/include/asm/elf.h | 30 ++++++++++++ arch/microblaze/include/asm/flat.h | 90 ++++++++++++++++++++++++++++++++++++ 2 files changed, 120 insertions(+), 0 deletions(-) create mode 100644 arch/microblaze/include/asm/elf.h create mode 100644 arch/microblaze/include/asm/flat.h diff --git a/arch/microblaze/include/asm/elf.h b/arch/microblaze/include/asm/elf.h new file mode 100644 index 0000000..81337f2 --- /dev/null +++ b/arch/microblaze/include/asm/elf.h @@ -0,0 +1,30 @@ +/* + * Copyright (C) 2006 Atmark Techno, Inc. + * + * 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. + */ + +#ifndef _ASM_MICROBLAZE_ELF_H +#define _ASM_MICROBLAZE_ELF_H + +/* + * Note there is no "official" ELF designation for Microblaze. + * I've snaffled the value from the microblaze binutils source code + * /binutils/microblaze/include/elf/microblaze.h + */ +#define EM_XILINX_MICROBLAZE 0xbaab +#define ELF_ARCH EM_XILINX_MICROBLAZE + +/* + * This is used to ensure we don't load something for the wrong architecture. + */ +#define elf_check_arch(x) ((x)->e_machine == EM_XILINX_MICROBLAZE) + +/* + * These are used to set parameters in the core dumps. + */ +#define ELF_CLASS ELFCLASS32 + +#endif /* _ASM_MICROBLAZE_ELF_H */ diff --git a/arch/microblaze/include/asm/flat.h b/arch/microblaze/include/asm/flat.h new file mode 100644 index 0000000..acf0da5 --- /dev/null +++ b/arch/microblaze/include/asm/flat.h @@ -0,0 +1,90 @@ +/* + * uClinux flat-format executables + * + * Copyright (C) 2005 John Williams + * + * 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. + */ + +#ifndef _ASM_MICROBLAZE_FLAT_H +#define _ASM_MICROBLAZE_FLAT_H + +#include + +#define flat_stack_align(sp) /* nothing needed */ +#define flat_argvp_envp_on_stack() 0 +#define flat_old_ram_flag(flags) (flags) +#define flat_reloc_valid(reloc, size) ((reloc) <= (size)) +#define flat_set_persistent(relval, p) 0 + +/* + * Microblaze works a little differently from other arches, because + * of the MICROBLAZE_64 reloc type. Here, a 32 bit address is split + * over two instructions, an 'imm' instruction which provides the top + * 16 bits, then the instruction "proper" which provides the low 16 + * bits. + */ + +/* + * Crack open a symbol reference and extract the address to be + * relocated. rp is a potentially unaligned pointer to the + * reference + */ + +static inline unsigned long +flat_get_addr_from_rp(unsigned long *rp, unsigned long relval, + unsigned long flags, unsigned long *persistent) +{ + unsigned long addr; + (void)flags; + + /* Is it a split 64/32 reference? */ + if (relval & 0x80000000) { + /* Grab the two halves of the reference */ + unsigned long val_hi, val_lo; + + val_hi = get_unaligned(rp); + val_lo = get_unaligned(rp+1); + + /* Crack the address out */ + addr = ((val_hi & 0xffff) << 16) + (val_lo & 0xffff); + } else { + /* Get the address straight out */ + addr = get_unaligned(rp); + } + + return addr; +} + +/* + * Insert an address into the symbol reference at rp. rp is potentially + * unaligned. + */ + +static inline void +flat_put_addr_at_rp(unsigned long *rp, unsigned long addr, unsigned long relval) +{ + /* Is this a split 64/32 reloc? */ + if (relval & 0x80000000) { + /* Get the two "halves" */ + unsigned long val_hi = get_unaligned(rp); + unsigned long val_lo = get_unaligned(rp + 1); + + /* insert the address */ + val_hi = (val_hi & 0xffff0000) | addr >> 16; + val_lo = (val_lo & 0xffff0000) | (addr & 0xffff); + + /* store the two halves back into memory */ + put_unaligned(val_hi, rp); + put_unaligned(val_lo, rp+1); + } else { + /* Put it straight in, no messing around */ + put_unaligned(addr, rp); + } +} + +#define flat_get_relocate_addr(rel) (rel & 0x7fffffff) + +#endif /* _ASM_MICROBLAZE_FLAT_H */ -- 1.5.5.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/