1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ALPHA_USER_H 3 #define _ALPHA_USER_H 4 5 #include <linux/sched.h> 6 #include <linux/ptrace.h> 7 8 #include <asm/page.h> 9 #include <asm/reg.h> 10 11 /* 12 * Core file format: The core file is written in such a way that gdb 13 * can understand it and provide useful information to the user (under 14 * linux we use the `trad-core' bfd, NOT the osf-core). The file contents 15 * are as follows: 16 * 17 * upage: 1 page consisting of a user struct that tells gdb 18 * what is present in the file. Directly after this is a 19 * copy of the task_struct, which is currently not used by gdb, 20 * but it may come in handy at some point. All of the registers 21 * are stored as part of the upage. The upage should always be 22 * only one page long. 23 * data: The data segment follows next. We use current->end_text to 24 * current->brk to pick up all of the user variables, plus any memory 25 * that may have been sbrk'ed. No attempt is made to determine if a 26 * page is demand-zero or if a page is totally unused, we just cover 27 * the entire range. All of the addresses are rounded in such a way 28 * that an integral number of pages is written. 29 * stack: We need the stack information in order to get a meaningful 30 * backtrace. We need to write the data from usp to 31 * current->start_stack, so we round each of these in order to be able 32 * to write an integer number of pages. 33 */ 34 struct user { 35 unsigned long regs[EF_SIZE/8+32]; /* integer and fp regs */ 36 size_t u_tsize; /* text size (pages) */ 37 size_t u_dsize; /* data size (pages) */ 38 size_t u_ssize; /* stack size (pages) */ 39 unsigned long start_code; /* text starting address */ 40 unsigned long start_data; /* data starting address */ 41 unsigned long start_stack; /* stack starting address */ 42 long int signal; /* signal causing core dump */ 43 unsigned long u_ar0; /* help gdb find registers */ 44 unsigned long magic; /* identifies a core file */ 45 char u_comm[32]; /* user command name */ 46 }; 47 48 #define NBPG PAGE_SIZE 49 #define UPAGES 1 50 #define HOST_TEXT_START_ADDR (u.start_code) 51 #define HOST_DATA_START_ADDR (u.start_data) 52 #define HOST_STACK_END_ADDR (u.start_stack + u.u_ssize * NBPG) 53 54 #endif /* _ALPHA_USER_H */ 55