1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef __ASM_SH_USER_H 3 #define __ASM_SH_USER_H 4 5 #include <asm/ptrace.h> 6 #include <asm/page.h> 7 8 /* 9 * Core file format: The core file is written in such a way that gdb 10 * can understand it and provide useful information to the user (under 11 * linux we use the `trad-core' bfd). The file contents are as follows: 12 * 13 * upage: 1 page consisting of a user struct that tells gdb 14 * what is present in the file. Directly after this is a 15 * copy of the task_struct, which is currently not used by gdb, 16 * but it may come in handy at some point. All of the registers 17 * are stored as part of the upage. The upage should always be 18 * only one page long. 19 * data: The data segment follows next. We use current->end_text to 20 * current->brk to pick up all of the user variables, plus any memory 21 * that may have been sbrk'ed. No attempt is made to determine if a 22 * page is demand-zero or if a page is totally unused, we just cover 23 * the entire range. All of the addresses are rounded in such a way 24 * that an integral number of pages is written. 25 * stack: We need the stack information in order to get a meaningful 26 * backtrace. We need to write the data from usp to 27 * current->start_stack, so we round each of these in order to be able 28 * to write an integer number of pages. 29 */ 30 31 struct user_fpu_struct { 32 unsigned long fp_regs[16]; 33 unsigned long xfp_regs[16]; 34 unsigned long fpscr; 35 unsigned long fpul; 36 }; 37 38 struct user { 39 struct pt_regs regs; /* entire machine state */ 40 struct user_fpu_struct fpu; /* Math Co-processor registers */ 41 int u_fpvalid; /* True if math co-processor being used */ 42 size_t u_tsize; /* text size (pages) */ 43 size_t u_dsize; /* data size (pages) */ 44 size_t u_ssize; /* stack size (pages) */ 45 unsigned long start_code; /* text starting address */ 46 unsigned long start_data; /* data starting address */ 47 unsigned long start_stack; /* stack starting address */ 48 long int signal; /* signal causing core dump */ 49 unsigned long u_ar0; /* help gdb find registers */ 50 struct user_fpu_struct* u_fpstate; /* Math Co-processor pointer */ 51 unsigned long magic; /* identifies a core file */ 52 char u_comm[32]; /* user command name */ 53 }; 54 55 #endif /* __ASM_SH_USER_H */ 56