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[PATCH RFC] arm-tdep.c: Define SVR4 link map offset fetcher
- From: Kevin Buettner <kevinb at redhat dot com>
- To: gdb-patches at sources dot redhat dot com
- Date: Tue, 27 Nov 2001 14:43:11 -0700
- Subject: [PATCH RFC] arm-tdep.c: Define SVR4 link map offset fetcher
The patch below adds shared library support for non-native ARM linux
targets. I'll wait a few days for comments before committing it.
Kevin
From Louis Hamilton <hamilton@redhat.com>:
* arm-tdep.c (solib-svr4.h): Include.
(arm_linux_svr4_fetch_link_map_offsets): New function.
* config/arm/tm-linux.h (SVR4_FETCH_LINK_MAP_OFFSETS): Define.
(arm_linux_svr4_fetch_link_map_offsets): Declare.
Index: arm-tdep.c
===================================================================
RCS file: /cvs/cvsfiles/devo/gdb/arm-tdep.c,v
retrieving revision 1.65.8.1.2.1
diff -u -p -r1.65.8.1.2.1 arm-tdep.c
--- arm-tdep.c 2001/10/02 15:53:35 1.65.8.1.2.1
+++ arm-tdep.c 2001/11/27 18:42:10
@@ -31,6 +31,7 @@
#include <ctype.h> /* for isupper () */
#include "regcache.h"
#include "doublest.h"
+#include "solib-svr4.h"
/* Each OS has a different mechanism for accessing the various
registers stored in the sigcontext structure.
@@ -2094,6 +2101,49 @@ arm_othernames (char *names, int n)
disassembly_flavor = valid_flavors[current_option];
set_disassembly_flavor ();
+}
+
+/* Fetch, and possibly build, an appropriate link_map_offsets structure
+ for ARM linux targets using the struct offsets defined in <link.h>.
+ Note, however, that link.h is not actually referred to in this file.
+ Instead, the relevant structs offsets were obtained from examining
+ link.h. (We can't refer to link.h from this file because the host
+ system won't necessarily have it, or if it does, the structs which
+ it defines will refer to the host system, not the target. */
+
+struct link_map_offsets *
+arm_linux_svr4_fetch_link_map_offsets (void)
+{
+ static struct link_map_offsets lmo;
+ static struct link_map_offsets *lmp = 0;
+
+ if (lmp == 0)
+ {
+ lmp = &lmo;
+
+ lmo.r_debug_size = 8; /* Actual size is 20, but this is all we
+ need. */
+
+ lmo.r_map_offset = 4;
+ lmo.r_map_size = 4;
+
+ lmo.link_map_size = 20; /* Actual size is 552, 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;
}
void
Index: config/arm/tm-linux.h
===================================================================
RCS file: /cvs/cvsfiles/devo/gdb/config/arm/tm-linux.h,v
retrieving revision 1.5
diff -u -p -r1.5 tm-linux.h
--- config/arm/tm-linux.h 2000/09/07 12:34:17 1.5
+++ config/arm/tm-linux.h 2001/11/27 18:42:11
@@ -26,6 +26,10 @@
#include "tm-linux.h"
+/* Use target-specific function to define link map offsets. */
+extern struct link_map_offsets *arm_linux_svr4_fetch_link_map_offsets (void);
+#define SVR4_FETCH_LINK_MAP_OFFSETS() arm_linux_svr4_fetch_link_map_offsets ()
+
/* Target byte order on ARM Linux is little endian and not selectable. */
#undef TARGET_BYTE_ORDER_SELECTABLE_P
#define TARGET_BYTE_ORDER_SELECTABLE_P 0