From bd287517b6b4d8ab4f24edd5d9c4e8e9e43b58a3 Mon Sep 17 00:00:00 2001
From: Chris Hanson <org/chris-hanson/cph>
Date: Mon, 4 Mar 1996 20:41:28 +0000
Subject: [PATCH] Changes to allow microcode to be compiled by the Linux ELF
 gcc.

---
 v7/src/microcode/s/linux.h | 20 +++---------
 v7/src/microcode/uxtop.c   | 64 ++------------------------------------
 2 files changed, 7 insertions(+), 77 deletions(-)

diff --git a/v7/src/microcode/s/linux.h b/v7/src/microcode/s/linux.h
index 8b21543ad..97f6e33a6 100644
--- a/v7/src/microcode/s/linux.h
+++ b/v7/src/microcode/s/linux.h
@@ -1,9 +1,9 @@
 /* -*-C-*-
    System file for Linux
 
-$Id: linux.h,v 1.6 1995/10/06 06:45:24 cph Exp $
+$Id: linux.h,v 1.7 1996/03/04 20:38:54 cph Exp $
 
-Copyright (c) 1995 Massachusetts Institute of Technology
+Copyright (c) 1995-96 Massachusetts Institute of Technology
 
 This material was developed by the Scheme project at the Massachusetts
 Institute of Technology, Department of Electrical Engineering and
@@ -35,8 +35,6 @@ MIT in each case. */
 
 #define LIBX11_MACHINE -L/usr/X11/lib
 
-#define LIBS_TERMCAP -ltermcap
-
 #define LIB_DEBUG
 
 #define ALTERNATE_M4 s/ultrix.m4
@@ -55,20 +53,12 @@ MIT in each case. */
    patch, because one of these days a.out won't be supported, but
    hopefully by then we'll know how to fix this correctly.  */
 
-#if 0
 #ifdef __ELF__
-#define C_SWITCH_SYSTEM -D_LINUX_ELF
 #define M4_SWITCH_SYSTEM -P "define(LINUX_ELF,1)"
+#define LD_SWITCH_SYSTEM -T s/linuxelf.lds
+#define LIBS_TERMCAP -lncurses
 #else
-#define C_SWITCH_SYSTEM
 #define M4_SWITCH_SYSTEM
-#endif
-#endif
-
-#ifdef __ELF__
-#define C_SWITCH_SYSTEM -b i486-linuxaout
-#define LD_SWITCH_SYSTEM -b i486-linuxaout
-#else
-#define C_SWITCH_SYSTEM
 #define LD_SWITCH_SYSTEM
+#define LIBS_TERMCAP -ltermcap
 #endif
diff --git a/v7/src/microcode/uxtop.c b/v7/src/microcode/uxtop.c
index b553230fc..4ece1f0cb 100644
--- a/v7/src/microcode/uxtop.c
+++ b/v7/src/microcode/uxtop.c
@@ -1,8 +1,8 @@
 /* -*-C-*-
 
-$Id: uxtop.c,v 1.17 1995/10/05 03:34:14 cph Exp $
+$Id: uxtop.c,v 1.18 1996/03/04 20:41:28 cph Exp $
 
-Copyright (c) 1990-95 Massachusetts Institute of Technology
+Copyright (c) 1990-96 Massachusetts Institute of Technology
 
 This material was developed by the Scheme project at the Massachusetts
 Institute of Technology, Department of Electrical Engineering and
@@ -41,12 +41,6 @@ MIT in each case. */
 #include "config.h"
 #include "extern.h"
 
-#ifdef _LINUX_ELF
-#include <linux/ldt.h>
-#include <linux/unistd.h>
-static void EXFUN (initialize_linux_elf_segments, (void));
-#endif
-
 extern void EXFUN (UX_initialize_channels, (void));
 extern void EXFUN (UX_initialize_ctty, (int interactive));
 extern void EXFUN (UX_initialize_directory_reader, (void));
@@ -117,9 +111,6 @@ DEFUN_VOID (OS_initialize)
 #ifdef _SUNOS
   vadvise (VA_ANOM);		/* Anomolous paging, don't try to guess. */
 #endif
-#ifdef _LINUX_ELF
-  initialize_linux_elf_segments ();
-#endif
 }
 
 void
@@ -431,54 +422,3 @@ OS_syserr_names (unsigned int * length, unsigned char *** names)
   (*length) = ((sizeof (syserr_names_table)) / (sizeof (char *)));
   (*names) = ((unsigned char **) syserr_names_table);
 }
-
-/* Special hacking for Linux ELF memory management.  */
-
-#ifdef _LINUX_ELF
-
-extern unsigned short Scheme_Code_Segment_Selector;
-extern unsigned short Scheme_Data_Segment_Selector;
-extern unsigned short Scheme_Stack_Segment_Selector;
-
-static _syscall3 (int, modify_ldt, int, func, void *, buffer, unsigned long, nbytes)
-
-static void
-DEFUN_VOID (initialize_linux_elf_segments)
-{
-  struct modify_ldt_ldt_s mldt;
-
-  (mldt . entry_number) = 1;
-  (mldt . base_addr) = LINUX_ELF_DATA_SEGMENT_START;
-  (mldt . limit) = LINUX_ELF_DATA_SEGMENT_LIMIT;
-  (mldt . seg_32bit) = 1;
-  (mldt . contents) = MODIFY_LDT_CONTENTS_CODE;
-  (mldt . read_exec_only) = 1;
-  (mldt . limit_in_pages) = 1;
-  (mldt . seg_not_present) = 0;
-  if ((modify_ldt (1, (&mldt), (sizeof (mldt)))) != 0)
-    {
-      outf_fatal ("\n%s: unable to allocate code segment descriptor\n",
-	       scheme_program_name);
-      Microcode_Termination (TERM_EXIT);
-    }
-  Scheme_Code_Segment_Selector = (((mldt . entry_number) << 3) | 0x7);
-    
-  (mldt . entry_number) = 2;
-  (mldt . base_addr) = LINUX_ELF_DATA_SEGMENT_START;
-  (mldt . limit) = LINUX_ELF_DATA_SEGMENT_LIMIT;
-  (mldt . seg_32bit) = 1;
-  (mldt . contents) = MODIFY_LDT_CONTENTS_DATA;
-  (mldt . read_exec_only) = 0;
-  (mldt . limit_in_pages) = 1;
-  (mldt . seg_not_present) = 0;
-  if ((modify_ldt (1, (&mldt), (sizeof (mldt)))) != 0)
-    {
-      outf_fatal ("\n%s: unable to allocate data segment descriptor\n",
-	       scheme_program_name);
-      Microcode_Termination (TERM_EXIT);
-    }
-  Scheme_Data_Segment_Selector = (((mldt . entry_number) << 3) | 0x7);
-  Scheme_Stack_Segment_Selector = Scheme_Data_Segment_Selector;
-}
-
-#endif /* _LINUX_ELF */
-- 
2.25.1