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kgdb support for gdb: patch 1
- From: "Amit S. Kale" <amitkale at linsyssoft dot com>
- To: GDB discussions <gdb at sources dot redhat dot com>
- Date: Thu, 21 Oct 2004 18:21:08 +0530
- Subject: kgdb support for gdb: patch 1
- Organization: LinSysSoft Technologies Pvt Ltd
Hi,
I have been working on the changes suggested by Mark K and Andrew C. Here is
the first patch. This adds support for a new osabi for linux kernel.
I haven't added any support for detecting kernel osabi automatically.
Detecting it with present kernel binary structure is rather shaky. It's safer
to let users run the command "set osabi Linux-kernel".
I'll be later sending more patches.
Please review it and let me know if it's ok for inclusion in gdb.
Thanks.
-Amit
Index: gdb/gdb/i386-linux-tdep.c
===================================================================
--- gdb.orig/gdb/i386-linux-tdep.c 2004-08-07 02:28:28.000000000 +0530
+++ gdb/gdb/i386-linux-tdep.c 2004-10-21 18:18:18.000000000 +0530
@@ -27,6 +27,7 @@
#include "inferior.h"
#include "osabi.h"
#include "reggroups.h"
+#include "elf-bfd.h"
#include "gdb_string.h"
@@ -416,6 +417,26 @@
set_gdbarch_skip_solib_resolver (gdbarch, glibc_skip_solib_resolver);
}
+static void
+i386_linuxkernel_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
+{
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+
+ /* Linux Kernel uses ELF format for vmlinux file. */
+ i386_elf_init_abi (info, gdbarch);
+
+ set_gdbarch_num_regs (gdbarch, I386_LINUX_NUM_REGS);
+ set_gdbarch_register_name (gdbarch, i386_linux_register_name);
+ set_gdbarch_register_reggroup_p (gdbarch, i386_linux_register_reggroup_p);
+
+ tdep->gregset_reg_offset = i386_linux_gregset_reg_offset;
+ tdep->gregset_num_regs = ARRAY_SIZE (i386_linux_gregset_reg_offset);
+ tdep->sizeof_gregset = 17 * 4;
+
+ tdep->jb_pc_offset = 20; /* From <bits/setjmp.h>. */
+
+}
+
/* Provide a prototype to silence -Wmissing-prototypes. */
extern void _initialize_i386_linux_tdep (void);
@@ -424,4 +445,6 @@
{
gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_LINUX,
i386_linux_init_abi);
+ gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_LINUXKERNEL,
+ i386_linuxkernel_init_abi);
}
Index: gdb/gdb/defs.h
===================================================================
--- gdb.orig/gdb/defs.h 2004-10-12 15:36:14.000000000 +0530
+++ gdb/gdb/defs.h 2004-10-21 18:14:02.000000000 +0530
@@ -1031,6 +1031,7 @@
GDB_OSABI_SOLARIS,
GDB_OSABI_OSF1,
GDB_OSABI_LINUX,
+ GDB_OSABI_LINUX_KERNEL,
GDB_OSABI_FREEBSD_AOUT,
GDB_OSABI_FREEBSD_ELF,
GDB_OSABI_NETBSD_AOUT,
Index: gdb/gdb/osabi.c
===================================================================
--- gdb.orig/gdb/osabi.c 2004-07-03 02:57:17.000000000 +0530
+++ gdb/gdb/osabi.c 2004-10-21 18:14:02.000000000 +0530
@@ -57,6 +57,7 @@
"Solaris",
"OSF/1",
"GNU/Linux",
+ "Linux-kernel",
"FreeBSD a.out",
"FreeBSD ELF",
"NetBSD a.out",