Date:	Wed, 11 Jun 1997 17:23:33 -0700
From:	Bill Currie <billc AT blackmagic DOT tait DOT co DOT nz>
Subject:	more patches for minkeep issures
To:	djgpp-workers AT delorie DOT com
Reply-to:	billc AT blackmagic DOT tait DOT co DOT nz
Message-id:	<339F4185.4F94@blackmagic.tait.co.nz>
Organization:	Tait Electronics NZ
MIME-version:	1.0

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Ok, here are some more patchs for my translation of stubinfo.minkeep. 
The patches to go32.h and crt1.h (relative to my previous patches) allow
the transfer buffer to be >=64k without causing any problems to the rest
of libc.  The addition buffer size can be use by application code for,
say, a separate transfer buffer. Also, the tb is forced to have a sector
aligned size.

Unfortunatly, the tb has to be >63.5k for there to be any free space for
application code.

The patch for v2load.c allows the debuggers to work correctly with the
new stubinfo format.

Heck, I hope that's it (other than the expected critisizms:).

Bill
-- 
Leave others their otherness.

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*** crt1.c.~~	Wed Jun 11 17:09:02 1997
--- crt1.c	Wed Jun 11 16:37:16 1997
***************
*** 84,94 ****
      _go32_info_block.stubinfo_version+=(_stubinfo->magic[11]-'0')*0x1000;
    }
    __tb = _stubinfo->ds_segment * 16;
!   _go32_info_block.size_of_transfer_buffer = _stubinfo->minkeep;
    if (_go32_info_block.stubinfo_version>=0x0201)
    {
      /* convert from paragraphs to bytes */
!     _go32_info_block.size_of_transfer_buffer<<=4;
    }
    _go32_info_block.pid = _stubinfo->psp_selector;
    _go32_info_block.master_interrupt_controller_base = ver.master_pic;
--- 84,109 ----
      _go32_info_block.stubinfo_version+=(_stubinfo->magic[11]-'0')*0x1000;
    }
    __tb = _stubinfo->ds_segment * 16;
!   _go32_info_block.true_size_of_transfer_buffer = _stubinfo->minkeep;
    if (_go32_info_block.stubinfo_version>=0x0201)
    {
      /* convert from paragraphs to bytes */
!     _go32_info_block.true_size_of_transfer_buffer<<=4;
!   }
!   if (_go32_info_block.true_size_of_transfer_buffer>65024) /* 63.5k */
!   {
! 	/* the maximum dos-usable transfer buffer size is 63.5k as that is the
! 	 * largest sector aligned size below 64k (dos cannot read more than
! 	 * 65535 (64k-1) bytes at a time).
! 	 */
! 	_go32_info_block.size_of_transfer_buffer=65024;
!   } else {
! 	/* force the effective transfer buffer size to be a multiple of 512
! 	 * (sector aligned) so that large transfers are always the fastest
! 	 * possible.
! 	 */
! 	_go32_info_block.size_of_transfer_buffer=
! 		_go32_info_block.true_size_of_transfer_buffer&~511;
    }
    _go32_info_block.pid = _stubinfo->psp_selector;
    _go32_info_block.master_interrupt_controller_base = ver.master_pic;

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*** go32.h.~~	Wed Jun 11 17:13:12 1997
--- go32.h	Wed Jun 11 16:26:30 1997
***************
*** 33,38 ****
--- 33,39 ----
    unsigned short run_mode;
    unsigned short run_mode_info;
    unsigned short stubinfo_version;
+   unsigned long true_size_of_transfer_buffer;
  } __Go32_Info_Block;
  
  extern __Go32_Info_Block _go32_info_block;

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*** src/debug.old/common/v2load.c	Tue Jul 23 22:57:48 1996
--- src/debug/common/v2load.c	Wed Jun 11 17:02:16 1997
***************
*** 18,23 ****
--- 18,24 ----
  #include <debug/v2load.h>
  #include <libc/farptrgs.h>
  #include <sys/stat.h>
+ #include <ctype.h>
  #define SIMAGIC "go32stub"
  
  AREAS areas[MAX_AREA];
***************
*** 61,66 ****
--- 62,69 ----
    __dpmi_meminfo memblock;
    unsigned new_env_selector;
    char true_name[FILENAME_MAX];
+   unsigned short stubinfo_version;
+   unsigned long minkeep;
  
    _truename(program, true_name);
  
***************
*** 91,96 ****
--- 94,106 ----
      si.minkeep = 16384;			/* transfer buffer size */
      memset(&si.basename, 0, 24);	/* Asciiz strings */
    }
+   stubinfo_version=(si.magic[12]-'0')*0x0100+
+ 		   (si.magic[14]-'0')*0x0010+
+ 		   (si.magic[15]-'0')*0x0001;
+   if (isdigit(si.magic[11]))
+   {
+     stubinfo_version+=(si.magic[11]-'0')*0x1000;
+   }
    if (header[0] != 0x014c) {		/* COFF? */
      close(pf);
      return -1;				/* Not V2 image, show failure */
***************
*** 152,158 ****
  
    /* Allocate the dos memory for the transfer buffer.  This nukes si.cs_selector,
     but that's OK since we set it next. */
!   i = __dpmi_allocate_dos_memory((si.minkeep + 256) / 16, (int *)&si.psp_selector);
    if(i == -1)
      return -1;
    si.ds_segment = i + (256/16);
--- 162,171 ----
  
    /* Allocate the dos memory for the transfer buffer.  This nukes si.cs_selector,
     but that's OK since we set it next. */
!   minkeep=si.minkeep;
!   if (stubinfo_version>=0x201)
!     minkeep<<=4;
!   i = __dpmi_allocate_dos_memory((minkeep + 256) / 16, (int *)&si.psp_selector);
    if(i == -1)
      return -1;
    si.ds_segment = i + (256/16);

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