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AC_CHECK_HEADERS(sys/select.h sys/timeb.h sys/time.h unistd.h utime.h \ | AC_CHECK_HEADERS(sys/select.h sys/timeb.h sys/time.h unistd.h utime.h \ |
linux/version.h sys/systeminfo.h termios.h limits.h string.h stdlib.h \ | linux/version.h sys/systeminfo.h termios.h limits.h string.h stdlib.h \ |
termcap.h stdio_ext.h fcntl.h term.h strings.h) | termcap.h stdio_ext.h fcntl.h term.h strings.h) |
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AC_MSG_CHECKING(if personality LINUX32 can be set) |
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AC_TRY_COMPILE([#include <sys/personality.h>], [personality (PER_LINUX32)], |
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emacs_cv_personality_linux32=yes, |
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emacs_cv_personality_linux32=no) |
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AC_MSG_RESULT($emacs_cv_personality_linux32) |
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if test $emacs_cv_personality_linux32 = yes; then |
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AC_DEFINE(HAVE_PERSONALITY_LINUX32, 1, |
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[Define to 1 if personality LINUX32 can be set.]) |
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fi |
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AC_HEADER_STDC | AC_HEADER_STDC |
AC_HEADER_TIME | AC_HEADER_TIME |
AC_DECL_SYS_SIGLIST | AC_DECL_SYS_SIGLIST |
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#undef HAVE_UALARM | #undef HAVE_UALARM |
#undef HAVE_SYS_WAIT_H | #undef HAVE_SYS_WAIT_H |
#undef HAVE_STRINGS_H | #undef HAVE_STRINGS_H |
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#undef HAVE_PERSONALITY_LINUX32 |
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#undef HAVE_LIBDNET | #undef HAVE_LIBDNET |
#undef HAVE_LIBPTHREADS | #undef HAVE_LIBPTHREADS |
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#include <sys/resource.h> | #include <sys/resource.h> |
#endif | #endif |
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#ifdef HAVE_PERSONALITY_LINUX32 |
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#include <sys/personality.h> |
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#endif |
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#ifndef O_RDWR | #ifndef O_RDWR |
#define O_RDWR 2 | #define O_RDWR 2 |
#endif | #endif |
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Tells GC how to save a copy of the stack. */ | Tells GC how to save a copy of the stack. */ |
char *stack_bottom; | char *stack_bottom; |
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/* The address where the heap starts (from the first sbrk (0) call). */ |
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static void *my_heap_start; |
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/* The gap between BSS end and heap start as far as we can tell. */ |
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static unsigned long heap_bss_diff; |
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/* If the gap between BSS end and heap start is larger than this we try to |
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work around it, and if that fails, output a warning in dump-emacs. */ |
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#define MAX_HEAP_BSS_DIFF (1024*1024) |
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#ifdef HAVE_WINDOW_SYSTEM | #ifdef HAVE_WINDOW_SYSTEM |
extern Lisp_Object Vwindow_system; | extern Lisp_Object Vwindow_system; |
#endif /* HAVE_WINDOW_SYSTEM */ | #endif /* HAVE_WINDOW_SYSTEM */ |
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free (malloc_state_ptr); | free (malloc_state_ptr); |
} | } |
else | else |
malloc_using_checking = getenv ("MALLOC_CHECK_") != NULL; |
{ |
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if (my_heap_start == 0) |
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my_heap_start = sbrk (0); |
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malloc_using_checking = getenv ("MALLOC_CHECK_") != NULL; |
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} |
} | } |
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void (*__malloc_initialize_hook) () = malloc_initialize_hook; | void (*__malloc_initialize_hook) () = malloc_initialize_hook; |
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stack_base = &dummy; | stack_base = &dummy; |
#endif | #endif |
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if (!initialized) |
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{ |
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extern char my_endbss[]; |
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extern char *my_endbss_static; |
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if (my_heap_start == 0) |
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my_heap_start = sbrk (0); |
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heap_bss_diff = (char *)my_heap_start |
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- (my_endbss > my_endbss_static ? my_endbss : my_endbss_static); |
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} |
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#ifdef LINUX_SBRK_BUG | #ifdef LINUX_SBRK_BUG |
__sbrk (1); | __sbrk (1); |
#endif | #endif |
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} | } |
} | } |
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#ifdef HAVE_PERSONALITY_LINUX32 |
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/* See if there is a gap between the end of BSS and the heap. |
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In that case, set personality and exec ourself again. */ |
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if (!initialized |
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&& (strcmp (argv[argc-1], "dump") == 0 |
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|| strcmp (argv[argc-1], "bootstrap") == 0) |
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&& heap_bss_diff > MAX_HEAP_BSS_DIFF) |
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{ |
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if (! getenv ("EMACS_HEAP_EXEC")) |
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{ |
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/* Set this so we only do this once. */ |
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putenv("EMACS_HEAP_EXEC=true"); |
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/* A flag to turn off address randomization which is introduced |
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in linux kernel shipped with fedora core 4 */ |
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#define ADD_NO_RANDOMIZE 0x0040000 |
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personality (PER_LINUX32 | ADD_NO_RANDOMIZE); |
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#undef ADD_NO_RANDOMIZE |
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execvp (argv[0], argv); |
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/* If the exec fails, try to dump anyway. */ |
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perror ("execvp"); |
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} |
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} |
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#endif /* HAVE_PERSONALITY_LINUX32 */ |
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/* Map in shared memory, if we are using that. */ | /* Map in shared memory, if we are using that. */ |
#ifdef HAVE_SHM | #ifdef HAVE_SHM |
if (argmatch (argv, argc, "-nl", "--no-shared-memory", 6, NULL, &skip_args)) | if (argmatch (argv, argc, "-nl", "--no-shared-memory", 6, NULL, &skip_args)) |
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char my_edata[] = "End of Emacs initialized data"; | char my_edata[] = "End of Emacs initialized data"; |
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#ifdef WINDOWSNT |
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/* Help unexec locate the end of the .bss area used by Emacs (which | /* Help unexec locate the end of the .bss area used by Emacs (which |
isn't always a separate section in NT executables). */ | isn't always a separate section in NT executables). */ |
char my_endbss[1]; | char my_endbss[1]; |
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of the bss area used by Emacs. */ | of the bss area used by Emacs. */ |
static char _my_endbss[1]; | static char _my_endbss[1]; |
char * my_endbss_static = _my_endbss; | char * my_endbss_static = _my_endbss; |
#endif |
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