From: "Mark E." <snowball3 AT bigfoot DOT com>
To: djgpp-workers AT delorie DOT com
Date: Sat, 23 Jun 2001 20:42:58 -0400
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Subject: v2loadimage and long cmd lines
Message-ID: <3B34FF52.30589.23972E@localhost>
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Reply-To: djgpp-workers AT delorie DOT com

I've tired of being unable to pass long command lines to a debugee. So I've 
written a patch to help fix that. It uses the CMDLINE method because it can 
be done with few changes unlike the proxy way. Thoughts?

Index: v2load.c
===================================================================
RCS file: /cvs/djgpp/djgpp/src/debug/common/v2load.c,v
retrieving revision 1.6
diff -c -p -r1.6 v2load.c
*** v2load.c	2001/06/21 17:13:50	1.6
--- v2load.c	2001/06/24 00:29:33
***************
*** 24,29 ****
--- 24,31 ----
  
  #define __tb_size _go32_info_block.size_of_transfer_buffer
  
+ #define MAX_CMDLINE_LEN 4096
+ 
  AREAS areas[MAX_AREA];
  
  extern char **environ;
*************** int v2loadimage(const char *program, con
*** 66,71 ****
--- 68,75 ----
    __dpmi_meminfo memblock;
    unsigned new_env_selector;
    char true_name[FILENAME_MAX];
+   char use_long_cmdline;
+   int cmdline_len;
  
    _truename(program, true_name);
  
*************** int v2loadimage(const char *program, con
*** 137,142 ****
--- 141,154 ----
    si.initial_size += 0xffff;
    si.initial_size &= 0xffff0000U;
  
+   cmdline_len = strlen(cmdline);
+   if (cmdline_len > 127 && cmdline_len < MAX_CMDLINE_LEN)
+   {
+     /* Dump long command line into CMDLINE environment variable.  */
+     setenv("CMDLINE", cmdline, 1);
+     use_long_cmdline = 1;
+   }
+ 
    si.env_size = 0;
    for (i=0; environ[i]; i++)
      si.env_size += strlen(environ[i])+1;
*************** int v2loadimage(const char *program, con
*** 257,263 ****
    _farpokew(si.psp_selector, 0x2c, new_env_selector);
  
    /* copy command arguments into debug process */
!   movedata(my_ds, (unsigned)cmdline, si.psp_selector, 128, 128);
    /* copy si we built into debug process */
    movedata(my_ds, (unsigned)&si, si.ds_selector, 0, sizeof(si));
    load_state->__ds = client_ds;
--- 269,281 ----
    _farpokew(si.psp_selector, 0x2c, new_env_selector);
  
    /* copy command arguments into debug process */
!   if (!use_long_cmdline)
!     movedata(my_ds, (unsigned)cmdline, si.psp_selector, 128, 128);
!   else
!     /* Don't copy the command line. Instead poke 0x7f to signal
!        that CMDLINE has the real command line.  */
!     _farpokeb(si.psp_selector, 128, 0x7f);
! 
    /* copy si we built into debug process */
    movedata(my_ds, (unsigned)&si, si.ds_selector, 0, sizeof(si));
    load_state->__ds = client_ds;