X-Git-Url: https://code.delx.au/gnu-emacs/blobdiff_plain/89117df0bb1c0803d1091873a330780ce8941543..463d631919baa394ee73a46843b2006aac9fdd4e:/src/unexhp9k800.c diff --git a/src/unexhp9k800.c b/src/unexhp9k800.c index 495094029d..ce65faffd4 100644 --- a/src/unexhp9k800.c +++ b/src/unexhp9k800.c @@ -49,19 +49,14 @@ sigsetreturn (_sigreturn); */ -#ifdef emacs #include -#endif +#include "unexec.h" #include #include #include - #include - -#ifdef HPUX_USE_SHLIBS #include -#endif /* brk value to restore, stored as a global. This is really used only if we used shared libraries. */ @@ -69,8 +64,7 @@ static long brk_on_dump = 0; /* Called from main, if we use shared libraries. */ int -run_time_remap (ignored) - char *ignored; +run_time_remap (char *ignored) { brk ((char *) brk_on_dump); } @@ -79,78 +73,11 @@ run_time_remap (ignored) #define roundup(x,n) (((x) + ((n) - 1)) & ~((n) - 1)) /* n is power of 2 */ #define min(x,y) (((x) < (y)) ? (x) : (y)) - -/* Create a new a.out file, same as old but with current data space */ - -unexec (new_name, old_name, new_end_of_text, dummy1, dummy2) - char new_name[]; /* name of the new a.out file to be created */ - char old_name[]; /* name of the old a.out file */ - char *new_end_of_text; /* ptr to new edata/etext; NOT USED YET */ - int dummy1, dummy2; /* not used by emacs */ -{ - int old, new; - int old_size, new_size; - struct header hdr; - struct som_exec_auxhdr auxhdr; - long i; - - /* For the greatest flexibility, should create a temporary file in - the same directory as the new file. When everything is complete, - rename the temp file to the new name. - This way, a program could update its own a.out file even while - it is still executing. If problems occur, everything is still - intact. NOT implemented. */ - - /* Open the input and output a.out files */ - old = open (old_name, O_RDONLY); - if (old < 0) - { perror (old_name); exit (1); } - new = open (new_name, O_CREAT|O_RDWR|O_TRUNC, 0777); - if (new < 0) - { perror (new_name); exit (1); } - - /* Read the old headers */ - read_header (old, &hdr, &auxhdr); - - brk_on_dump = (long) sbrk (0); - - /* Decide how large the new and old data areas are */ - old_size = auxhdr.exec_dsize; - /* I suspect these two statements are separate - to avoid a compiler bug in hpux version 8. */ - i = (long) sbrk (0); - new_size = i - auxhdr.exec_dmem; - - /* Copy the old file to the new, up to the data space */ - lseek (old, 0, 0); - copy_file (old, new, auxhdr.exec_dfile); - - /* Skip the old data segment and write a new one */ - lseek (old, old_size, 1); - save_data_space (new, &hdr, &auxhdr, new_size); - - /* Copy the rest of the file */ - copy_rest (old, new); - - /* Update file pointers since we probably changed size of data area */ - update_file_ptrs (new, &hdr, &auxhdr, auxhdr.exec_dfile, new_size-old_size); - - /* Save the modified header */ - write_header (new, &hdr, &auxhdr); - - /* Close the binary file */ - close (old); - close (new); - return 0; -} - /* Save current data space in the file, update header. */ -save_data_space (file, hdr, auxhdr, size) - int file; - struct header *hdr; - struct som_exec_auxhdr *auxhdr; - int size; +static void +save_data_space (int file, struct header *hdr, struct som_exec_auxhdr *auxhdr, + int size) { /* Write the entire data space out to the file */ if (write (file, auxhdr->exec_dmem, size) != size) @@ -163,12 +90,9 @@ save_data_space (file, hdr, auxhdr, size) /* Update the values of file pointers when something is inserted. */ -update_file_ptrs (file, hdr, auxhdr, location, offset) - int file; - struct header *hdr; - struct som_exec_auxhdr *auxhdr; - unsigned int location; - int offset; +static void +update_file_ptrs (int file, struct header *hdr, struct som_exec_auxhdr *auxhdr, + unsigned int location, int offset) { struct subspace_dictionary_record subspace; int i; @@ -214,10 +138,8 @@ update_file_ptrs (file, hdr, auxhdr, location, offset) /* Read in the header records from an a.out file. */ -read_header (file, hdr, auxhdr) - int file; - struct header *hdr; - struct som_exec_auxhdr *auxhdr; +static void +read_header (int file, struct header *hdr, struct som_exec_auxhdr *auxhdr) { /* Read the header in */ @@ -228,7 +150,7 @@ read_header (file, hdr, auxhdr) if (hdr->a_magic != EXEC_MAGIC && hdr->a_magic != SHARE_MAGIC && hdr->a_magic != DEMAND_MAGIC) { - fprintf (stderr, "a.out file doesn't have legal magic number\n"); + fprintf (stderr, "a.out file doesn't have valid magic number\n"); exit (1); } @@ -242,10 +164,8 @@ read_header (file, hdr, auxhdr) /* Write out the header records into an a.out file. */ -write_header (file, hdr, auxhdr) - int file; - struct header *hdr; - struct som_exec_auxhdr *auxhdr; +static void +write_header (int file, struct header *hdr, struct som_exec_auxhdr *auxhdr) { /* Update the checksum */ hdr->checksum = calculate_checksum (hdr); @@ -261,8 +181,8 @@ write_header (file, hdr, auxhdr) /* Calculate the checksum of a SOM header record. */ -calculate_checksum (hdr) - struct header *hdr; +static int +calculate_checksum (struct header *hdr) { int checksum, i, *ptr; @@ -276,9 +196,8 @@ calculate_checksum (hdr) /* Copy size bytes from the old file to the new one. */ -copy_file (old, new, size) - int new, old; - int size; +static void +copy_file (int old, int new, int size) { int len; int buffer[8192]; /* word aligned will be faster */ @@ -295,8 +214,8 @@ copy_file (old, new, size) /* Copy the rest of the file, up to EOF. */ -copy_rest (old, new) - int new, old; +static void +copy_rest (int old, int new) { int buffer[4096]; int len; @@ -310,9 +229,8 @@ copy_rest (old, new) } #ifdef DEBUG -display_header (hdr, auxhdr) - struct header *hdr; - struct som_exec_auxhdr *auxhdr; +static void +display_header (struct header *hdr, struct som_exec_auxhdr *auxhdr) { /* Display the header information (debug) */ printf ("\n\nFILE HEADER\n"); @@ -330,5 +248,63 @@ display_header (hdr, auxhdr) } #endif /* DEBUG */ -/* arch-tag: d55a09ac-9427-4ec4-8496-cb9d7710774f - (do not change this comment) */ + +/* Create a new a.out file, same as old but with current data space */ +void +unexec (const char *new_name, /* name of the new a.out file to be created */ + const char *old_name) /* name of the old a.out file */ +{ + int old, new; + int old_size, new_size; + struct header hdr; + struct som_exec_auxhdr auxhdr; + long i; + + /* For the greatest flexibility, should create a temporary file in + the same directory as the new file. When everything is complete, + rename the temp file to the new name. + This way, a program could update its own a.out file even while + it is still executing. If problems occur, everything is still + intact. NOT implemented. */ + + /* Open the input and output a.out files */ + old = open (old_name, O_RDONLY); + if (old < 0) + { perror (old_name); exit (1); } + new = open (new_name, O_CREAT|O_RDWR|O_TRUNC, 0777); + if (new < 0) + { perror (new_name); exit (1); } + + /* Read the old headers */ + read_header (old, &hdr, &auxhdr); + + brk_on_dump = (long) sbrk (0); + + /* Decide how large the new and old data areas are */ + old_size = auxhdr.exec_dsize; + /* I suspect these two statements are separate + to avoid a compiler bug in hpux version 8. */ + i = (long) sbrk (0); + new_size = i - auxhdr.exec_dmem; + + /* Copy the old file to the new, up to the data space */ + lseek (old, 0, 0); + copy_file (old, new, auxhdr.exec_dfile); + + /* Skip the old data segment and write a new one */ + lseek (old, old_size, 1); + save_data_space (new, &hdr, &auxhdr, new_size); + + /* Copy the rest of the file */ + copy_rest (old, new); + + /* Update file pointers since we probably changed size of data area */ + update_file_ptrs (new, &hdr, &auxhdr, auxhdr.exec_dfile, new_size-old_size); + + /* Save the modified header */ + write_header (new, &hdr, &auxhdr); + + /* Close the binary file */ + close (old); + close (new); +}