This is the mail archive of the gdb-patches@sources.redhat.com mailing list for the GDB project.
Index Nav:	[Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav:	[Date Prev] [Date Next]	[Thread Prev] [Thread Next]
Other format:	[Raw text]
[PATCH] Define SVR4 link map offset fetcher for Linux/PPC

From: Kevin Buettner <kevinb at redhat dot com>
To: gdb-patches at sources dot redhat dot com
Date: Fri, 30 Nov 2001 17:34:04 -0700
Subject: [PATCH] Define SVR4 link map offset fetcher for Linux/PPC
I've just committed the patch below.  It adds cross platform SVR4 shared
library support for Linux/PPC.  Note that all PowerPC targets are affected
due to the multiarched nature of this support.

I've tested this patch on AIX (to make sure I didn't break the build
or cause any regressions) and also in a Linux/x86 cross Linux/PPC test
environment.

	* ppc-linux-tdep.c (solib-svr4.h): Include.
	(ppc_linux_svr4_fetch_link_map_offsets): New function.
	* ppc-tdep.h (ppc_linux_svr4_fetch_link_map_offsets): Declare.
	* rs6000-tdep.c (solib-svr4.h): Include.
	(rs6000_gdbarch_init): Set up ppc_linux_svr4_fetch_link_map_offsets()
	as the link map offsets fetcher.

	* config/powerpc/aix.mt (TDEPFILES): Add solib-svr4.o.
	* config/powerpc/macos.mt (TDEPFILES): Likewise.
	* config/powerpc/nbsd.mt (TDEPFILES): Likewise.
	* config/powerpc/ppc-eabi.mt (TDEPFILES): Likewise.
	* config/powerpc/ppc-sim.mt (TDEPFILES): Likewise.
	* config/powerpc/ppcle-eabi.mt (TDEPFILES): Likewise.
	* config/powerpc/ppcle-sim.mt (TDEPFILES): Likewise.
	* config/powerpc/vxworks.mt (TDEPFILES): Likewise.
	* config/rs6000/aix4.mt (TDEPFILES): Likewise.
	* config/rs6000/rs6000.mt (TDEPFILES): Likewise.
	* config/rs6000/rs6000lynx.mt (TDEPFILES): Likewise.

Index: ppc-linux-tdep.c
===================================================================
RCS file: /cvs/src/src/gdb/ppc-linux-tdep.c,v
retrieving revision 1.10
diff -u -p -r1.10 ppc-linux-tdep.c
--- ppc-linux-tdep.c	2001/10/21 17:19:37	1.10
+++ ppc-linux-tdep.c	2001/12/01 00:20:03
@@ -32,6 +32,7 @@
 #include "regcache.h"
 #include "value.h"
 
+#include "solib-svr4.h"
 #include "ppc-tdep.h"
 
 /* The following two instructions are used in the signal trampoline
@@ -762,4 +763,44 @@ ppc_linux_memory_remove_breakpoint (CORE
     val = target_write_memory (addr, contents_cache, bplen);
 
   return val;
+}
+
+/* Fetch (and possibly build) an appropriate link_map_offsets
+   structure for Linux/PPC targets using the struct offsets
+   defined in link.h (but without actual reference to that file).
+
+   This makes it possible to access Linux/PPC shared libraries from a
+   GDB that was not built on an Linux/PPC host (for cross debugging).  */
+
+struct link_map_offsets *
+ppc_linux_svr4_fetch_link_map_offsets (void)
+{
+  static struct link_map_offsets lmo;
+  static struct link_map_offsets *lmp = NULL;
+
+  if (lmp == NULL)
+    {
+      lmp = &lmo;
+
+      lmo.r_debug_size = 8;	/* The actual size is 20 bytes, but
+				   this is all we need.  */
+      lmo.r_map_offset = 4;
+      lmo.r_map_size   = 4;
+
+      lmo.link_map_size = 20;	/* The actual size is 560 bytes, but
+				   this is all we need.  */
+      lmo.l_addr_offset = 0;
+      lmo.l_addr_size   = 4;
+
+      lmo.l_name_offset = 4;
+      lmo.l_name_size   = 4;
+
+      lmo.l_next_offset = 12;
+      lmo.l_next_size   = 4;
+
+      lmo.l_prev_offset = 16;
+      lmo.l_prev_size   = 4;
+    }
+
+  return lmp;
 }
Index: ppc-tdep.h
===================================================================
RCS file: /cvs/src/src/gdb/ppc-tdep.h,v
retrieving revision 1.3
diff -u -p -r1.3 ppc-tdep.h
--- ppc-tdep.h	2001/11/30 02:14:08	1.3
+++ ppc-tdep.h	2001/12/01 00:20:03
@@ -34,6 +34,7 @@ CORE_ADDR ppc_linux_frame_chain (struct 
 CORE_ADDR ppc_sysv_abi_push_arguments (int, struct value **, CORE_ADDR, int,
 				       CORE_ADDR);
 int ppc_linux_memory_remove_breakpoint (CORE_ADDR addr, char *contents_cache);
+struct link_map_offsets *ppc_linux_svr4_fetch_link_map_offsets (void);
 
 
 /* From rs6000-tdep.c... */
Index: rs6000-tdep.c
===================================================================
RCS file: /cvs/src/src/gdb/rs6000-tdep.c,v
retrieving revision 1.28
diff -u -p -r1.28 rs6000-tdep.c
--- rs6000-tdep.c	2001/10/21 17:19:37	1.28
+++ rs6000-tdep.c	2001/12/01 00:20:07
@@ -40,6 +40,7 @@
 
 #include "elf-bfd.h"
 
+#include "solib-svr4.h"
 #include "ppc-tdep.h"
 
 /* If the kernel has to deliver a signal, it pushes a sigcontext
@@ -2333,6 +2334,8 @@ rs6000_gdbarch_init (struct gdbarch_info
 
       set_gdbarch_memory_remove_breakpoint (gdbarch,
 	                                    ppc_linux_memory_remove_breakpoint);
+      set_solib_svr4_fetch_link_map_offsets 
+	(gdbarch, ppc_linux_svr4_fetch_link_map_offsets);
     }
   else
     {
Index: config/powerpc/aix.mt
===================================================================
RCS file: /cvs/src/src/gdb/config/powerpc/aix.mt,v
retrieving revision 1.3
diff -u -p -r1.3 aix.mt
--- aix.mt	2000/11/09 09:49:00	1.3
+++ aix.mt	2001/12/01 00:20:08
@@ -1,3 +1,3 @@
 # Target: PowerPC running AIX
-TDEPFILES= rs6000-tdep.o ppc-linux-tdep.o
+TDEPFILES= rs6000-tdep.o ppc-linux-tdep.o solib.o solib-svr4.o
 TM_FILE= tm-ppc-aix.h
Index: config/powerpc/macos.mt
===================================================================
RCS file: /cvs/src/src/gdb/config/powerpc/macos.mt,v
retrieving revision 1.2
diff -u -p -r1.2 macos.mt
--- macos.mt	2000/07/31 20:56:43	1.2
+++ macos.mt	2001/12/01 00:20:08
@@ -1,3 +1,3 @@
 # Target: PowerMac (PowerPC running MacOS)
-TDEPFILES= rs6000-tdep.o xcoffread.o ppc-linux-tdep.o
+TDEPFILES= rs6000-tdep.o xcoffread.o ppc-linux-tdep.o solib.o solib-svr4.o
 TM_FILE= tm-macos.h
Index: config/powerpc/nbsd.mt
===================================================================
RCS file: /cvs/src/src/gdb/config/powerpc/nbsd.mt,v
retrieving revision 1.6
diff -u -p -r1.6 nbsd.mt
--- nbsd.mt	2001/10/20 00:16:44	1.6
+++ nbsd.mt	2001/12/01 00:20:08
@@ -1,5 +1,5 @@
 # Target: PowerPC, running NetBSD
-TDEPFILES= rs6000-tdep.o ppc-linux-tdep.o
+TDEPFILES= rs6000-tdep.o ppc-linux-tdep.o solib.o solib-svr4.o
 TM_FILE= tm-nbsd.h
 
 GDBSERVER_DEPFILES= low-nbsd.o
Index: config/powerpc/ppc-eabi.mt
===================================================================
RCS file: /cvs/src/src/gdb/config/powerpc/ppc-eabi.mt,v
retrieving revision 1.3
diff -u -p -r1.3 ppc-eabi.mt
--- ppc-eabi.mt	2001/06/28 03:33:26	1.3
+++ ppc-eabi.mt	2001/12/01 00:20:08
@@ -1,3 +1,3 @@
 # Target: PowerPC running eabi
-TDEPFILES= rs6000-tdep.o monitor.o dsrec.o ppcbug-rom.o dink32-rom.o ppc-bdm.o ocd.o remote-sds.o ppc-linux-tdep.o
+TDEPFILES= rs6000-tdep.o monitor.o dsrec.o ppcbug-rom.o dink32-rom.o ppc-bdm.o ocd.o remote-sds.o ppc-linux-tdep.o solib.o solib-svr4.o
 TM_FILE= tm-ppc-eabi.h
Index: config/powerpc/ppc-sim.mt
===================================================================
RCS file: /cvs/src/src/gdb/config/powerpc/ppc-sim.mt,v
retrieving revision 1.3
diff -u -p -r1.3 ppc-sim.mt
--- ppc-sim.mt	2001/06/28 03:33:26	1.3
+++ ppc-sim.mt	2001/12/01 00:20:08
@@ -1,5 +1,5 @@
 # Target: PowerPC running eabi and including the simulator
-TDEPFILES= rs6000-tdep.o monitor.o dsrec.o ppcbug-rom.o dink32-rom.o ppc-bdm.o ocd.o remote-sds.o ppc-linux-tdep.o
+TDEPFILES= rs6000-tdep.o monitor.o dsrec.o ppcbug-rom.o dink32-rom.o ppc-bdm.o ocd.o remote-sds.o ppc-linux-tdep.o solib.o solib-svr4.o
 TM_FILE= tm-ppc-eabi.h
 
 SIM_OBS = remote-sim.o
Index: config/powerpc/ppcle-eabi.mt
===================================================================
RCS file: /cvs/src/src/gdb/config/powerpc/ppcle-eabi.mt,v
retrieving revision 1.3
diff -u -p -r1.3 ppcle-eabi.mt
--- ppcle-eabi.mt	2001/06/28 03:33:26	1.3
+++ ppcle-eabi.mt	2001/12/01 00:20:08
@@ -1,3 +1,3 @@
 # Target: PowerPC running eabi in little endian mode
-TDEPFILES= rs6000-tdep.o monitor.o dsrec.o ppcbug-rom.o ppc-bdm.o ocd.o ppc-linux-tdep.o
+TDEPFILES= rs6000-tdep.o monitor.o dsrec.o ppcbug-rom.o ppc-bdm.o ocd.o ppc-linux-tdep.o solib.o solib-svr4.o
 TM_FILE= tm-ppcle-eabi.h
Index: config/powerpc/ppcle-sim.mt
===================================================================
RCS file: /cvs/src/src/gdb/config/powerpc/ppcle-sim.mt,v
retrieving revision 1.3
diff -u -p -r1.3 ppcle-sim.mt
--- ppcle-sim.mt	2001/06/28 03:33:26	1.3
+++ ppcle-sim.mt	2001/12/01 00:20:08
@@ -1,5 +1,5 @@
 # Target: PowerPC running eabi in little endian mode under the simulator
-TDEPFILES= rs6000-tdep.o monitor.o dsrec.o ppcbug-rom.o ppc-bdm.o ocd.o ppc-linux-tdep.o
+TDEPFILES= rs6000-tdep.o monitor.o dsrec.o ppcbug-rom.o ppc-bdm.o ocd.o ppc-linux-tdep.o solib.o solib-svr4.o
 TM_FILE= tm-ppcle-eabi.h
 
 SIM_OBS = remote-sim.o
Index: config/powerpc/vxworks.mt
===================================================================
RCS file: /cvs/src/src/gdb/config/powerpc/vxworks.mt,v
retrieving revision 1.2
diff -u -p -r1.2 vxworks.mt
--- vxworks.mt	2000/07/31 20:56:43	1.2
+++ vxworks.mt	2001/12/01 00:20:08
@@ -1,3 +1,3 @@
 # Target: Powerpc running VxWorks
-TDEPFILES= rs6000-tdep.o ppc-linux-tdep.o
+TDEPFILES= rs6000-tdep.o ppc-linux-tdep.o solib.o solib-svr4.o
 TM_FILE= tm-vxworks.h
Index: config/rs6000/aix4.mt
===================================================================
RCS file: /cvs/src/src/gdb/config/rs6000/aix4.mt,v
retrieving revision 1.3
diff -u -p -r1.3 aix4.mt
--- aix4.mt	2000/11/09 09:49:00	1.3
+++ aix4.mt	2001/12/01 00:20:08
@@ -1,3 +1,3 @@
 # Target: IBM RS/6000 running AIX4
-TDEPFILES= rs6000-tdep.o xcoffread.o ppc-linux-tdep.o
+TDEPFILES= rs6000-tdep.o xcoffread.o ppc-linux-tdep.o solib.o solib-svr4.o
 TM_FILE= tm-rs6000-aix4.h
Index: config/rs6000/rs6000.mt
===================================================================
RCS file: /cvs/src/src/gdb/config/rs6000/rs6000.mt,v
retrieving revision 1.3
diff -u -p -r1.3 rs6000.mt
--- rs6000.mt	2000/11/09 09:49:00	1.3
+++ rs6000.mt	2001/12/01 00:20:08
@@ -1,3 +1,3 @@
 # Target: IBM RS/6000 running AIX
-TDEPFILES= rs6000-tdep.o xcoffread.o ppc-linux-tdep.o
+TDEPFILES= rs6000-tdep.o xcoffread.o ppc-linux-tdep.o solib.o solib-svr4.o
 TM_FILE= tm-rs6000.h
Index: config/rs6000/rs6000lynx.mt
===================================================================
RCS file: /cvs/src/src/gdb/config/rs6000/rs6000lynx.mt,v
retrieving revision 1.4
diff -u -p -r1.4 rs6000lynx.mt
--- rs6000lynx.mt	2000/10/25 20:48:59	1.4
+++ rs6000lynx.mt	2001/12/01 00:20:08
@@ -1,3 +1,3 @@
 # Target: IBM RS6000 running LynxOS
-TDEPFILES= coff-solib.o rs6000-tdep.o ppc-linux-tdep.o
+TDEPFILES= coff-solib.o rs6000-tdep.o ppc-linux-tdep.o solib.o solib-svr4.o
 TM_FILE= tm-rs6000ly.h
Index Nav:	[Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav:	[Date Prev] [Date Next]	[Thread Prev] [Thread Next]