11da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#ifndef _M68K_USER_H 21da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define _M68K_USER_H 31da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 41da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* Core file format: The core file is written in such a way that gdb 51da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds can understand it and provide useful information to the user (under 61da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds linux we use the 'trad-core' bfd). There are quite a number of 71da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds obstacles to being able to view the contents of the floating point 81da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds registers, and until these are solved you will not be able to view the 91da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds contents of them. Actually, you can read in the core file and look at 101da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds the contents of the user struct to find out what the floating point 111da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds registers contain. 121da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds The actual file contents are as follows: 131da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds UPAGE: 1 page consisting of a user struct that tells gdb what is present 141da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds in the file. Directly after this is a copy of the task_struct, which 151da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds is currently not used by gdb, but it may come in useful at some point. 161da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds All of the registers are stored as part of the upage. The upage should 171da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds always be only one page. 181da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds DATA: The data area is stored. We use current->end_text to 191da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds current->brk to pick up all of the user variables, plus any memory 201da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds that may have been malloced. No attempt is made to determine if a page 211da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds is demand-zero or if a page is totally unused, we just cover the entire 221da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds range. All of the addresses are rounded in such a way that an integral 231da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds number of pages is written. 241da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds STACK: We need the stack information in order to get a meaningful 251da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds backtrace. We need to write the data from (esp) to 261da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds current->start_stack, so we round each of these off in order to be able 271da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds to write an integer number of pages. 281da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds The minimum core file size is 3 pages, or 12288 bytes. 291da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds*/ 301da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 311da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct user_m68kfp_struct { 321da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long fpregs[8*3]; /* fp0-fp7 registers */ 331da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long fpcntl[3]; /* fp control regs */ 341da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 351da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 361da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* This is the old layout of "struct pt_regs" as of Linux 1.x, and 371da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds is still the layout used by user (the new pt_regs doesn't have 381da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds all registers). */ 391da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct user_regs_struct { 401da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds long d1,d2,d3,d4,d5,d6,d7; 411da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds long a0,a1,a2,a3,a4,a5,a6; 421da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds long d0; 431da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds long usp; 441da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds long orig_d0; 451da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds short stkadj; 461da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds short sr; 471da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds long pc; 481da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds short fmtvec; 491da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds short __fill; 501da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 511da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 521da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 531da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* When the kernel dumps core, it starts by dumping the user struct - 541da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds this will be used by gdb to figure out where the data and stack segments 551da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds are within the file, and what virtual addresses to use. */ 561da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvaldsstruct user{ 571da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* We start with the registers, to mimic the way that "memory" is returned 581da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds from the ptrace(3,...) function. */ 591da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct user_regs_struct regs; /* Where the registers are actually stored */ 601da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* ptrace does not yet supply these. Someday.... */ 611da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int u_fpvalid; /* True if math co-processor being used. */ 621da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* for this mess. Not yet used. */ 631da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct user_m68kfp_struct m68kfp; /* Math Co-processor registers. */ 641da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds/* The rest of this junk is to help gdb figure out what goes where */ 651da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long int u_tsize; /* Text segment size (pages). */ 661da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long int u_dsize; /* Data segment size (pages). */ 671da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long int u_ssize; /* Stack segment size (pages). */ 681da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long start_code; /* Starting virtual address of text. */ 691da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long start_stack; /* Starting virtual address of stack area. 701da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds This is actually the bottom of the stack, 711da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds the top of the stack is always found in the 721da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds esp register. */ 731da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds long int signal; /* Signal that caused the core dump. */ 741da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds int reserved; /* No longer used */ 756e16d89bcd668a95eb22add24c02d80890232b66H. Peter Anvin unsigned long u_ar0; /* Used by gdb to help find the values for */ 761da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds /* the registers. */ 771da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds struct user_m68kfp_struct* u_fpstate; /* Math Co-processor pointer. */ 781da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds unsigned long magic; /* To uniquely identify a core file */ 791da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds char u_comm[32]; /* User command that was responsible */ 801da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds}; 815e7c4ea83efa9d6269bcbf17611f83aeef71c096Roman Zippel#define NBPG 4096 821da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define UPAGES 1 831da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define HOST_TEXT_START_ADDR (u.start_code) 841da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#define HOST_STACK_END_ADDR (u.start_stack + u.u_ssize * NBPG) 851da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds 861da177e4c3f41524e886b7f1b8a0c1fc7321cacLinus Torvalds#endif 87