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52 lines
2.1 KiB
52 lines
2.1 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef _ASM_POWERPC_USER_H |
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#define _ASM_POWERPC_USER_H |
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#include <asm/ptrace.h> |
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#include <asm/page.h> |
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/* |
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* Adapted from <asm-alpha/user.h> |
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* |
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* Core file format: The core file is written in such a way that gdb |
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* can understand it and provide useful information to the user (under |
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* linux we use the `trad-core' bfd, NOT the osf-core). The file contents |
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* are as follows: |
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* |
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* upage: 1 page consisting of a user struct that tells gdb |
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* what is present in the file. Directly after this is a |
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* copy of the task_struct, which is currently not used by gdb, |
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* but it may come in handy at some point. All of the registers |
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* are stored as part of the upage. The upage should always be |
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* only one page long. |
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* data: The data segment follows next. We use current->end_text to |
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* current->brk to pick up all of the user variables, plus any memory |
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* that may have been sbrk'ed. No attempt is made to determine if a |
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* page is demand-zero or if a page is totally unused, we just cover |
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* the entire range. All of the addresses are rounded in such a way |
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* that an integral number of pages is written. |
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* stack: We need the stack information in order to get a meaningful |
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* backtrace. We need to write the data from usp to |
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* current->start_stack, so we round each of these in order to be able |
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* to write an integer number of pages. |
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*/ |
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struct user { |
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struct user_pt_regs regs; /* entire machine state */ |
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size_t u_tsize; /* text size (pages) */ |
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size_t u_dsize; /* data size (pages) */ |
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size_t u_ssize; /* stack size (pages) */ |
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unsigned long start_code; /* text starting address */ |
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unsigned long start_data; /* data starting address */ |
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unsigned long start_stack; /* stack starting address */ |
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long int signal; /* signal causing core dump */ |
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unsigned long u_ar0; /* help gdb find registers */ |
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unsigned long magic; /* identifies a core file */ |
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char u_comm[32]; /* user command name */ |
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}; |
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#define NBPG PAGE_SIZE |
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#define UPAGES 1 |
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#define HOST_TEXT_START_ADDR (u.start_code) |
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#define HOST_DATA_START_ADDR (u.start_data) |
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#define HOST_STACK_END_ADDR (u.start_stack + u.u_ssize * NBPG) |
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#endif /* _ASM_POWERPC_USER_H */
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