63843c265f
Dump core after a panic. This will provide better debugging information than is currently available. Signed-off-by: Jeff Dike <jdike@linux.intel.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
128 lines
2.5 KiB
C
128 lines
2.5 KiB
C
/*
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* Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
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* Licensed under the GPL
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <limits.h>
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#include <sys/mman.h>
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#include <sys/stat.h>
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#include <sys/utsname.h>
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#include <sys/param.h>
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#include <sys/time.h>
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#include "asm/types.h"
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#include <ctype.h>
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#include <signal.h>
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#include <wait.h>
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#include <errno.h>
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#include <stdarg.h>
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#include <sched.h>
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#include <termios.h>
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#include <string.h>
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#include "kern_util.h"
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#include "user.h"
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#include "mem_user.h"
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#include "init.h"
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#include "ptrace_user.h"
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#include "uml-config.h"
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#include "os.h"
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#include "longjmp.h"
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#include "kern_constants.h"
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void stack_protections(unsigned long address)
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{
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int prot = PROT_READ | PROT_WRITE | PROT_EXEC;
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if(mprotect((void *) address, UM_KERN_PAGE_SIZE, prot) < 0)
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panic("protecting stack failed, errno = %d", errno);
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}
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void task_protections(unsigned long address)
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{
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unsigned long guard = address + UM_KERN_PAGE_SIZE;
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unsigned long stack = guard + UM_KERN_PAGE_SIZE;
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int prot = 0, pages;
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#ifdef notdef
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if(mprotect((void *) stack, UM_KERN_PAGE_SIZE, prot) < 0)
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panic("protecting guard page failed, errno = %d", errno);
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#endif
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pages = (1 << UML_CONFIG_KERNEL_STACK_ORDER) - 2;
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prot = PROT_READ | PROT_WRITE | PROT_EXEC;
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if(mprotect((void *) stack, pages * UM_KERN_PAGE_SIZE, prot) < 0)
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panic("protecting stack failed, errno = %d", errno);
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}
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int raw(int fd)
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{
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struct termios tt;
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int err;
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CATCH_EINTR(err = tcgetattr(fd, &tt));
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if(err < 0)
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return -errno;
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cfmakeraw(&tt);
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CATCH_EINTR(err = tcsetattr(fd, TCSADRAIN, &tt));
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if(err < 0)
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return -errno;
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/* XXX tcsetattr could have applied only some changes
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* (and cfmakeraw() is a set of changes) */
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return(0);
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}
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void setup_machinename(char *machine_out)
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{
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struct utsname host;
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uname(&host);
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#ifdef UML_CONFIG_UML_X86
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# ifndef UML_CONFIG_64BIT
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if (!strcmp(host.machine, "x86_64")) {
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strcpy(machine_out, "i686");
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return;
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}
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# else
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if (!strcmp(host.machine, "i686")) {
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strcpy(machine_out, "x86_64");
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return;
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}
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# endif
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#endif
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strcpy(machine_out, host.machine);
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}
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void setup_hostinfo(char *buf, int len)
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{
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struct utsname host;
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uname(&host);
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snprintf(buf, len, "%s %s %s %s %s", host.sysname, host.nodename,
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host.release, host.version, host.machine);
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}
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int setjmp_wrapper(void (*proc)(void *, void *), ...)
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{
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va_list args;
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jmp_buf buf;
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int n;
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n = UML_SETJMP(&buf);
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if(n == 0){
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va_start(args, proc);
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(*proc)(&buf, &args);
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}
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va_end(args);
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return n;
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}
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void os_dump_core(void)
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{
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signal(SIGSEGV, SIG_DFL);
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abort();
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}
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