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Re: New gdb 31 & 64 bit patches for S/390
- To: Andrew Cagney <ac131313 at cygnus dot com>
- Subject: Re: New gdb 31 & 64 bit patches for S/390
- From: DJBARROW at de dot ibm dot com
- Date: Mon, 18 Jun 2001 12:31:07 +0200
- cc: gdb-patches at sourceware dot cygnus dot com
Hi Andrew,
It is a 31 bit architecture owing to an addressing mode limitation ( it
never was known as a 32 bit arch though all the registers are 32 bit ).
The 370 was 24 bit & a beautiful design decision was made to signify a 31
bit address to use the hi bit of a 32 bit address.
After recognising their mistake the zSeries is 64 bit clean.
D.J. Barrow Gnu/Linux for S/390 kernel developer
eMail: djbarrow@de.ibm.com,barrow_dj@yahoo.com
Phone: +49-(0)7031-16-2583
IBM Germany Lab, Schönaicherstr. 220, 71032 Böblingen
Andrew Cagney <ac131313@cygnus.com> on 15.06.2001 18:52:52
Please respond to Andrew Cagney <ac131313@cygnus.com>
To: Denis Joseph Barrow/Germany/Contr/IBM@IBMDE
cc: gdb-patches@sourceware.cygnus.com, s390-patches@gnu.org, Martin
Schwidefsky/Germany/IBM@IBMDE, Christoph Arenz/Germany/IBM@IBMDE
Subject: Re: New gdb 31 & 64 bit patches for S/390
Hello,
I intend checking in the attatched (diff) patch. Before doing it
though, is the s390 really a 31 bit architecture?
For reference I've also included the original diff and ChangeLog.
Andrew
2001-06-15 Andrew Cagney <ac131313@redhat.com>
From 2001-02-26 D.J. Barrow <djbarrow@de.ibm.com>:
* configure.tgt: Add S/390 31 & 64 bit target configuration.
* configure.host: Ditto for host.
Index: configure.host
===================================================================
RCS file: /cvs/src/src/gdb/configure.host,v
retrieving revision 1.21
diff -p -r1.21 configure.host
*** configure.host 2001/06/07 15:57:57 1.21
--- configure.host 2001/06/15 16:46:05
*************** m68*) gdb_host_cpu=m68k ;;
*** 18,23 ****
--- 18,24 ----
m88*) gdb_host_cpu=m88k ;;
powerpc*) gdb_host_cpu=powerpc ;;
sparc64) gdb_host_cpu=sparc ;;
+ s390*) gdb_host_cpu=s390 ;;
*) gdb_host_cpu=$host_cpu ;;
esac
*************** powerpc-*-netbsd*) gdb_host=nbsd ;;
*** 138,143 ****
--- 139,146 ----
rs6000-*-lynxos*) gdb_host=rs6000lynx ;;
rs6000-*-aix4*) gdb_host=aix4 ;;
rs6000-*-*) gdb_host=rs6000 ;;
+
+ s390*-*-*) gdb_host=s390 ;;
sparc-*-linux*) gdb_host=linux ;;
sparc-*-lynxos*) gdb_host=sparclynx ;;
Index: configure.tgt
===================================================================
RCS file: /cvs/src/src/gdb/configure.tgt,v
retrieving revision 1.29
diff -p -r1.29 configure.tgt
*** configure.tgt 2001/06/07 15:57:57 1.29
--- configure.tgt 2001/06/15 16:46:05
*************** mips*) gdb_target_cpu=mips ;;
*** 23,28 ****
--- 23,29 ----
powerpc*) gdb_target_cpu=powerpc ;;
sparc*) gdb_target_cpu=sparc ;;
thumb*) gdb_target_cpu=arm ;;
+ s390*) gdb_target_cpu=s390 ;;
strongarm*) gdb_target_cpu=arm ;;
xscale*) gdb_target_cpu=arm ;;
v850*) gdb_target_cpu=v850 ;;
*************** rs6000-*-lynxos*) gdb_target=rs6000lynx
*** 255,260 ****
--- 256,264 ----
configdirs="${configdirs} gdbserver" ;;
rs6000-*-aix4*) gdb_target=aix4 ;;
rs6000-*-*) gdb_target=rs6000 ;;
+
+ s390-*-*) gdb_target=s390 ;;
+ s390x-*-*) gdb_target=s390x ;;
sh*-*-pe) gdb_target=wince ;;
sh-*-hms) gdb_target=embed ;;
2001-02-26 D.J. Barrow <djbarrow@de.ibm.com,barrow_dj@yahoo.com>
* s390-nat.c New file Added for S/390 31 & 64 bit target.
* s390-tdep.c Likewise.
* config/s390/nm-linux.h Likewise.
* config/s390/s390x.mt Likewise.
* config/s390/tm-linux.h Likewise.
* config/s390/xm-linux.h Likewise
* config/s390/s390.mh Likewise.
* config/s390/s390.mt Likewise.
* config/s390/tm-s390.h Likewise.
* config.in Added definitions for S/390 31 & 64 bit target.
* configure.host Likewise.
* configure.in Likewise.
* configure.tgt Likewise.
* gdbarch.sh Added 2 definitions to the input table
allow_null_function, this definition is set to an
non empty string if it is okay for the gdbarch function
to be null.
null_function_default_retval, this definiton is the
default return value for a undefined function
(i.e. allow_null_function is defined ).
Added new macros required for S/390
INIT_FRAME_PC_FIRST
CANNOT_STORE_REGISTER
CANNOT_FETCH_REGISTER
ADDR_BITS_REMOVE
EXTRACT_STRUCT_VALUE_ADDRESS_P
Improved the behaviour of the following macros.
PUSH_RETURN_ADDRESS
added allow null function so default behaviour would be correct.
EXTRACT_STRUCT_VALUE_ADDRESS
added check for EXTRACT_STRUCT_VALUE_ADDRESS_P
CALL_DUMMY_BREAKPOINT_OFFSET
* core-aout.c added check for CANNOT_FETCH_REGISTER
in fetch_core_registers.
* arch-utils.c added check for BFD_ENDIAN_UNKNOWN
in set_endian_from_file.
--- src.orig/config.sub Sat Feb 10 01:55:46 2001
+++ src.new/config.sub Mon Feb 26 17:57:37 2001
@@ -740,6 +740,12 @@
rtpc | rtpc-*)
basic_machine=romp-ibm
;;
+ s390 | s390-* )
+ basic_machine=s390-ibm
+ ;;
+ s390x | s390x-* )
+ basic_machine=s390x-ibm
+ ;;
sa29200)
basic_machine=a29k-amd
os=-udi
--- src.orig/gdb/configure.host Thu Feb 8 07:30:23 2001
+++ src.new/gdb/configure.host Mon Feb 26 17:57:37 2001
@@ -18,6 +18,7 @@
m88*) gdb_host_cpu=m88k ;;
powerpc*) gdb_host_cpu=powerpc ;;
sparc64) gdb_host_cpu=sparc ;;
+s390*) gdb_host_cpu=s390 ;;
*) gdb_host_cpu=$host_cpu ;;
esac
@@ -158,5 +159,10 @@
vax-*-bsd*) gdb_host=vaxbsd ;;
vax-*-ultrix2*) gdb_host=vaxult2 ;;
vax-*-ultrix*) gdb_host=vaxult ;;
-
+s390*-*-*) gdb_host=s390 ;;
esac
+
+
+
+
+
--- src.orig/gdb/configure.tgt Thu Feb 8 07:30:23 2001
+++ src.new/gdb/configure.tgt Mon Feb 26 17:57:37 2001
@@ -26,6 +26,7 @@
strongarm*) gdb_target_cpu=arm ;;
xscale*) gdb_target_cpu=arm ;;
v850*) gdb_target_cpu=v850 ;;
+s390*) gdb_target_cpu=s390 ;;
*) gdb_target_cpu=$target_cpu ;;
esac
@@ -305,6 +306,8 @@
z8k-*-coff*) gdb_target=z8k ;;
+s390-*-*) gdb_target=s390 ;;
+s390x-*-*) gdb_target=s390x ;;
esac