1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef __ASM_CRIS_USER_H 3 #define __ASM_CRIS_USER_H 4 5 #include <linux/types.h> 6 #include <asm/ptrace.h> 7 #include <asm/page.h> 8 #include <arch/user.h> 9 10 /* 11 * Core file format: The core file is written in such a way that gdb 12 * can understand it and provide useful information to the user (under 13 * linux we use the `trad-core' bfd). The file contents are as follows: 14 * 15 * upage: 1 page consisting of a user struct that tells gdb 16 * what is present in the file. Directly after this is a 17 * copy of the task_struct, which is currently not used by gdb, 18 * but it may come in handy at some point. All of the registers 19 * are stored as part of the upage. The upage should always be 20 * only one page long. 21 * data: The data segment follows next. We use current->end_text to 22 * current->brk to pick up all of the user variables, plus any memory 23 * that may have been sbrk'ed. No attempt is made to determine if a 24 * page is demand-zero or if a page is totally unused, we just cover 25 * the entire range. All of the addresses are rounded in such a way 26 * that an integral number of pages is written. 27 * stack: We need the stack information in order to get a meaningful 28 * backtrace. We need to write the data from usp to 29 * current->start_stack, so we round each of these in order to be able 30 * to write an integer number of pages. 31 */ 32 33 struct user { 34 struct user_regs_struct regs; /* entire machine state */ 35 size_t u_tsize; /* text size (pages) */ 36 size_t u_dsize; /* data size (pages) */ 37 size_t u_ssize; /* stack size (pages) */ 38 unsigned long start_code; /* text starting address */ 39 unsigned long start_data; /* data starting address */ 40 unsigned long start_stack; /* stack starting address */ 41 long int signal; /* signal causing core dump */ 42 unsigned long u_ar0; /* help gdb find registers */ 43 unsigned long magic; /* identifies a core file */ 44 char u_comm[32]; /* user command name */ 45 }; 46 47 #define NBPG PAGE_SIZE 48 #define UPAGES 1 49 #define HOST_TEXT_START_ADDR (u.start_code) 50 #define HOST_DATA_START_ADDR (u.start_data) 51 #define HOST_STACK_END_ADDR (u.start_stack + u.u_ssize * NBPG) 52 53 #endif /* __ASM_CRIS_USER_H */ 54