1*b2441318SGreg Kroah-Hartman /* SPDX-License-Identifier: GPL-2.0 */ 2f15cbe6fSPaul Mundt #ifndef __ASM_SH_USER_H 3f15cbe6fSPaul Mundt #define __ASM_SH_USER_H 4f15cbe6fSPaul Mundt 5f15cbe6fSPaul Mundt #include <asm/ptrace.h> 6f15cbe6fSPaul Mundt #include <asm/page.h> 7f15cbe6fSPaul Mundt 8f15cbe6fSPaul Mundt /* 9f15cbe6fSPaul Mundt * Core file format: The core file is written in such a way that gdb 10f15cbe6fSPaul Mundt * can understand it and provide useful information to the user (under 11f15cbe6fSPaul Mundt * linux we use the `trad-core' bfd). The file contents are as follows: 12f15cbe6fSPaul Mundt * 13f15cbe6fSPaul Mundt * upage: 1 page consisting of a user struct that tells gdb 14f15cbe6fSPaul Mundt * what is present in the file. Directly after this is a 15f15cbe6fSPaul Mundt * copy of the task_struct, which is currently not used by gdb, 16f15cbe6fSPaul Mundt * but it may come in handy at some point. All of the registers 17f15cbe6fSPaul Mundt * are stored as part of the upage. The upage should always be 18f15cbe6fSPaul Mundt * only one page long. 19f15cbe6fSPaul Mundt * data: The data segment follows next. We use current->end_text to 20f15cbe6fSPaul Mundt * current->brk to pick up all of the user variables, plus any memory 21f15cbe6fSPaul Mundt * that may have been sbrk'ed. No attempt is made to determine if a 22f15cbe6fSPaul Mundt * page is demand-zero or if a page is totally unused, we just cover 23f15cbe6fSPaul Mundt * the entire range. All of the addresses are rounded in such a way 24f15cbe6fSPaul Mundt * that an integral number of pages is written. 25f15cbe6fSPaul Mundt * stack: We need the stack information in order to get a meaningful 26f15cbe6fSPaul Mundt * backtrace. We need to write the data from usp to 27f15cbe6fSPaul Mundt * current->start_stack, so we round each of these in order to be able 28f15cbe6fSPaul Mundt * to write an integer number of pages. 29f15cbe6fSPaul Mundt */ 30f15cbe6fSPaul Mundt 31f15cbe6fSPaul Mundt struct user_fpu_struct { 32f15cbe6fSPaul Mundt unsigned long fp_regs[16]; 33f15cbe6fSPaul Mundt unsigned long xfp_regs[16]; 34f15cbe6fSPaul Mundt unsigned long fpscr; 35f15cbe6fSPaul Mundt unsigned long fpul; 36f15cbe6fSPaul Mundt }; 37f15cbe6fSPaul Mundt 38f15cbe6fSPaul Mundt struct user { 39f15cbe6fSPaul Mundt struct pt_regs regs; /* entire machine state */ 40f15cbe6fSPaul Mundt struct user_fpu_struct fpu; /* Math Co-processor registers */ 41f15cbe6fSPaul Mundt int u_fpvalid; /* True if math co-processor being used */ 42f15cbe6fSPaul Mundt size_t u_tsize; /* text size (pages) */ 43f15cbe6fSPaul Mundt size_t u_dsize; /* data size (pages) */ 44f15cbe6fSPaul Mundt size_t u_ssize; /* stack size (pages) */ 45f15cbe6fSPaul Mundt unsigned long start_code; /* text starting address */ 46f15cbe6fSPaul Mundt unsigned long start_data; /* data starting address */ 47f15cbe6fSPaul Mundt unsigned long start_stack; /* stack starting address */ 48f15cbe6fSPaul Mundt long int signal; /* signal causing core dump */ 49f15cbe6fSPaul Mundt unsigned long u_ar0; /* help gdb find registers */ 50f15cbe6fSPaul Mundt struct user_fpu_struct* u_fpstate; /* Math Co-processor pointer */ 51f15cbe6fSPaul Mundt unsigned long magic; /* identifies a core file */ 52f15cbe6fSPaul Mundt char u_comm[32]; /* user command name */ 53f15cbe6fSPaul Mundt }; 54f15cbe6fSPaul Mundt 55f15cbe6fSPaul Mundt #endif /* __ASM_SH_USER_H */ 56