From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail-ww0-f41.google.com ([74.125.82.41]) by canuck.infradead.org with esmtps (Exim 4.72 #1 (Red Hat Linux)) id 1PvHUe-0003bQ-1x for barebox@lists.infradead.org; Thu, 03 Mar 2011 22:59:43 +0000 Received: by wwb29 with SMTP id 29so491962wwb.0 for ; Thu, 03 Mar 2011 14:59:33 -0800 (PST) From: franck.jullien@gmail.com Date: Thu, 3 Mar 2011 23:59:08 +0100 Message-Id: <4d701d55.9009d80a.2cd3.5ead@mx.google.com> In-Reply-To: References: List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: barebox-bounces@lists.infradead.org Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [PATCH 54/54] Add arch/nios2/include/asm/user.h To: barebox@lists.infradead.org From: Franck JULLIEN Add arch/nios2/include/asm/user.h --- arch/nios2/include/asm/user.h | 136 +++++++++++++++++++++++++++++++++++++++++ 1 files changed, 136 insertions(+), 0 deletions(-) create mode 100644 arch/nios2/include/asm/user.h diff --git a/arch/nios2/include/asm/user.h b/arch/nios2/include/asm/user.h new file mode 100644 index 0000000..61586f5 --- /dev/null +++ b/arch/nios2/include/asm/user.h @@ -0,0 +1,136 @@ +#ifndef _ASM_NIOS2_USER_H +#define _ASM_NIOS2_USER_H + +/*-------------------------------------------------------------------- + * + * include/asm-nios2/user.h + * + * Derived from M68knommu + * + * Copyright (C) 2004 Microtronix Datacom Ltd + * + * 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; either version 2 of the License, or + * (at your option) any later version. + * + * 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. See the + * GNU General Public License for more details. + * + * + * Jan/20/2004 dgt NiosII + * + ---------------------------------------------------------------------*/ + + +#include + +/* Core file format: The core file is written in such a way that gdb + can understand it and provide useful information to the user (under + linux we use the 'trad-core' bfd). There are quite a number of + obstacles to being able to view the contents of the floating point + registers, and until these are solved you will not be able to view the + contents of them. Actually, you can read in the core file and look at + the contents of the user struct to find out what the floating point + registers contain. + The actual file contents are as follows: + UPAGE: 1 page consisting of a user struct that tells gdb what is present + in the file. Directly after this is a copy of the task_struct, which + is currently not used by gdb, but it may come in useful at some point. + All of the registers are stored as part of the upage. The upage should + always be only one page. + DATA: The data area is stored. We use current->end_text to + current->brk to pick up all of the user variables, plus any memory + that may have been malloced. No attempt is made to determine if a page + is demand-zero or if a page is totally unused, we just cover the entire + range. All of the addresses are rounded in such a way that an integral + number of pages is written. + STACK: We need the stack information in order to get a meaningful + backtrace. We need to write the data from (esp) to + current->start_stack, so we round each of these off in order to be able + to write an integer number of pages. + The minimum core file size is 3 pages, or 12288 bytes. +*/ + +struct user_m68kfp_struct { + unsigned long fpregs[8*3]; /* fp0-fp7 registers */ + unsigned long fpcntl[3]; /* fp control regs */ +}; + +/* This is needs more work, probably should look like gdb useage */ +struct user_regs_struct { + unsigned long r8; /* r8-r15 Caller-saved GP registers */ + unsigned long r9; + unsigned long r10; + unsigned long r11; + unsigned long r12; + unsigned long r13; + unsigned long r14; + unsigned long r15; + unsigned long r1; /* Assembler temporary */ + unsigned long r2; /* Retval LS 32bits */ + unsigned long r3; /* Retval MS 32bits */ + unsigned long r4; /* r4-r7 Register arguments */ + unsigned long r5; + unsigned long r6; + unsigned long r7; + unsigned long orig_r2; /* Copy of r2 ?? */ + unsigned long ra; /* Return address */ + unsigned long fp; /* Frame pointer */ + unsigned long sp; /* Stack pointer */ + unsigned long gp; /* Global pointer */ + unsigned long estatus; + unsigned long ea; /* Exception return address (pc) */ + unsigned long orig_r7; + + unsigned long r16; /* r16-r23 Callee-saved GP registers */ + unsigned long r17; + unsigned long r18; + unsigned long r19; + unsigned long r20; + unsigned long r21; + unsigned long r22; + unsigned long r23; + unsigned long sw_fp; + unsigned long sw_gp; + unsigned long sw_ra; +}; + + +/* When the kernel dumps core, it starts by dumping the user struct - + this will be used by gdb to figure out where the data and stack segments + are within the file, and what virtual addresses to use. */ +struct user{ +/* We start with the registers, to mimic the way that "memory" is returned + from the ptrace(3,...) function. */ + struct user_regs_struct regs; /* Where the registers are actually stored */ +/* ptrace does not yet supply these. Someday.... */ + int u_fpvalid; /* True if math co-processor being used. */ + /* for this mess. Not yet used. */ + struct user_m68kfp_struct m68kfp; /* Math Co-processor registers. */ +/* The rest of this junk is to help gdb figure out what goes where */ + unsigned long int u_tsize; /* Text segment size (pages). */ + unsigned long int u_dsize; /* Data segment size (pages). */ + unsigned long int u_ssize; /* Stack segment size (pages). */ + unsigned long start_code; /* Starting virtual address of text. */ + unsigned long start_stack; /* Starting virtual address of stack area. + This is actually the bottom of the stack, + the top of the stack is always found in the + esp register. */ + long int signal; /* Signal that caused the core dump. */ + int reserved; /* No longer used */ + unsigned long u_ar0; + /* Used by gdb to help find the values for */ + /* the registers. */ + struct user_m68kfp_struct* u_fpstate; /* Math Co-processor pointer. */ + unsigned long magic; /* To uniquely identify a core file */ + char u_comm[32]; /* User command that was responsible */ +}; +#define NBPG PAGE_SIZE +#define UPAGES 1 +#define HOST_TEXT_START_ADDR (u.start_code) +#define HOST_STACK_END_ADDR (u.start_stack + u.u_ssize * NBPG) + +#endif /* _ASM_NIOS2_USER_H */ -- 1.7.3.4 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox