user.h
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上传日期:2013-02-24
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文件大小:2k
- /*
- * BK Id: SCCS/s.user.h 1.5 05/17/01 18:14:26 cort
- */
- #ifdef __KERNEL__
- #ifndef _PPC_USER_H
- #define _PPC_USER_H
- /* Adapted from <asm-alpha/user.h> */
- #include <linux/ptrace.h>
- #include <asm/page.h>
- /*
- * Core file format: The core file is written in such a way that gdb
- * can understand it and provide useful information to the user (under
- * linux we use the `trad-core' bfd, NOT the osf-core). The file contents
- * are as follows:
- *
- * upage: 1 page consisting of a user struct that tells gdb
- * what is present in the file. Directly after this is a
- * copy of the task_struct, which is currently not used by gdb,
- * but it may come in handy at some point. All of the registers
- * are stored as part of the upage. The upage should always be
- * only one page long.
- * data: The data segment follows next. We use current->end_text to
- * current->brk to pick up all of the user variables, plus any memory
- * that may have been sbrk'ed. No attempt is made to determine if a
- * page is demand-zero or if a page is totally unused, we just cover
- * the entire range. All of the addresses are rounded in such a way
- * that an integral number of pages is written.
- * stack: We need the stack information in order to get a meaningful
- * backtrace. We need to write the data from usp to
- * current->start_stack, so we round each of these in order to be able
- * to write an integer number of pages.
- */
- struct user {
- struct pt_regs regs; /* entire machine state */
- size_t u_tsize; /* text size (pages) */
- size_t u_dsize; /* data size (pages) */
- size_t u_ssize; /* stack size (pages) */
- unsigned long start_code; /* text starting address */
- unsigned long start_data; /* data starting address */
- unsigned long start_stack; /* stack starting address */
- long int signal; /* signal causing core dump */
- struct regs * u_ar0; /* help gdb find registers */
- unsigned long magic; /* identifies a core file */
- char u_comm[32]; /* user command name */
- };
- #define NBPG PAGE_SIZE
- #define UPAGES 1
- #define HOST_TEXT_START_ADDR (u.start_code)
- #define HOST_DATA_START_ADDR (u.start_data)
- #define HOST_STACK_END_ADDR (u.start_stack + u.u_ssize * NBPG)
- #endif /* _PPC_USER_H */
- #endif /* __KERNEL__ */