diff options
Diffstat (limited to 'src/unexec.c')
| -rw-r--r-- | src/unexec.c | 88 |
1 files changed, 0 insertions, 88 deletions
diff --git a/src/unexec.c b/src/unexec.c index 8edd9e22b96..f7f93b066de 100644 --- a/src/unexec.c +++ b/src/unexec.c @@ -48,8 +48,6 @@ along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ * * Specifying zero for data_start means the boundary between text and data * should not be the same as when the program was loaded. - * If NO_REMAP is defined, the argument data_start is ignored and the - * segment boundaries are never changed. * * Bss_start indicates how much of the data segment is to be saved in the * a.out file and restored when the program is executed. It gives the lowest @@ -69,56 +67,6 @@ along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ * of Dell Computer Corporation. james@bigtex.cactus.org. */ -/* There are several compilation parameters affecting unexec: - -* COFF - -Define this if your system uses COFF for executables. - -* NO_REMAP - -Define this if you do not want to try to save Emacs's pure data areas -as part of the text segment. - -Saving them as text is good because it allows users to share more. - -However, on machines that locate the text area far from the data area, -the boundary cannot feasibly be moved. Such machines require -NO_REMAP. - -Also, remapping can cause trouble with the built-in startup routine -/lib/crt0.o, which defines `environ' as an initialized variable. -Dumping `environ' as pure does not work! So, to use remapping, -you must write a startup routine for your machine in Emacs's crt0.c. -If NO_REMAP is defined, Emacs uses the system's crt0.o. - -* SECTION_ALIGNMENT - -Some machines that use COFF executables require that each section -start on a certain boundary *in the COFF file*. Such machines should -define SECTION_ALIGNMENT to a mask of the low-order bits that must be -zero on such a boundary. This mask is used to control padding between -segments in the COFF file. - -If SECTION_ALIGNMENT is not defined, the segments are written -consecutively with no attempt at alignment. This is right for -unmodified system V. - -* SEGMENT_MASK - -Some machines require that the beginnings and ends of segments -*in core* be on certain boundaries. For most machines, a page -boundary is sufficient. That is the default. When a larger -boundary is needed, define SEGMENT_MASK to a mask of -the bits that must be zero on such a boundary. - -* ADJUST_EXEC_HEADER - -This macro can be used to generate statements to adjust or -initialize nonstandard fields in the file header - -*/ - #ifndef emacs #define PERROR(arg) perror (arg); return -1 #else @@ -264,19 +212,9 @@ make_hdr (new, a_out, data_start, bss_start, entry_address, a_name, new_name) pagemask = getpagesize () - 1; /* Adjust text/data boundary. */ -#ifdef NO_REMAP data_start = (int) start_of_data (); -#else /* not NO_REMAP */ - if (!data_start) - data_start = (int) start_of_data (); -#endif /* not NO_REMAP */ data_start = ADDR_CORRECT (data_start); - -#ifdef SEGMENT_MASK - data_start = data_start & ~SEGMENT_MASK; /* (Down) to segment boundary. */ -#else data_start = data_start & ~pagemask; /* (Down) to page boundary. */ -#endif bss_end = ADDR_CORRECT (sbrk (0)) + pagemask; bss_end &= ~ pagemask; @@ -374,42 +312,20 @@ make_hdr (new, a_out, data_start, bss_start, entry_address, a_name, new_name) to correspond to what we want to dump. */ f_hdr.f_flags |= (F_RELFLG | F_EXEC); -#ifndef NO_REMAP f_ohdr.text_start = (long) start_of_text (); f_ohdr.tsize = data_start - f_ohdr.text_start; f_ohdr.data_start = data_start; -#endif /* NO_REMAP */ f_ohdr.dsize = bss_start - f_ohdr.data_start; f_ohdr.bsize = bss_end - bss_start; - /* On some machines, the old values are right. - ??? Maybe on all machines with NO_REMAP. */ f_thdr.s_size = f_ohdr.tsize; f_thdr.s_scnptr = sizeof (f_hdr) + sizeof (f_ohdr); f_thdr.s_scnptr += (f_hdr.f_nscns) * (sizeof (f_thdr)); lnnoptr = f_thdr.s_lnnoptr; -#ifdef SECTION_ALIGNMENT - /* Some systems require special alignment - of the sections in the file itself. */ - f_thdr.s_scnptr - = (f_thdr.s_scnptr + SECTION_ALIGNMENT) & ~SECTION_ALIGNMENT; -#endif /* SECTION_ALIGNMENT */ text_scnptr = f_thdr.s_scnptr; f_dhdr.s_paddr = f_ohdr.data_start; f_dhdr.s_vaddr = f_ohdr.data_start; f_dhdr.s_size = f_ohdr.dsize; f_dhdr.s_scnptr = f_thdr.s_scnptr + f_thdr.s_size; -#ifdef SECTION_ALIGNMENT - /* Some systems require special alignment - of the sections in the file itself. */ - f_dhdr.s_scnptr - = (f_dhdr.s_scnptr + SECTION_ALIGNMENT) & ~SECTION_ALIGNMENT; -#endif /* SECTION_ALIGNMENT */ -#ifdef DATA_SECTION_ALIGNMENT - /* Some systems require special alignment - of the data section only. */ - f_dhdr.s_scnptr - = (f_dhdr.s_scnptr + DATA_SECTION_ALIGNMENT) & ~DATA_SECTION_ALIGNMENT; -#endif /* DATA_SECTION_ALIGNMENT */ data_scnptr = f_dhdr.s_scnptr; f_bhdr.s_paddr = f_ohdr.data_start + f_ohdr.dsize; f_bhdr.s_vaddr = f_ohdr.data_start + f_ohdr.dsize; @@ -427,10 +343,6 @@ make_hdr (new, a_out, data_start, bss_start, entry_address, a_name, new_name) f_thdr.s_lnnoptr += bias; } -#ifdef ADJUST_EXEC_HEADER - ADJUST_EXEC_HEADER; -#endif /* ADJUST_EXEC_HEADER */ - if (write (new, &f_hdr, sizeof (f_hdr)) != sizeof (f_hdr)) { PERROR (new_name); |