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authorMark Kettenis <kettenis@gnu.org>2002-07-04 15:13:28 +0000
committerMark Kettenis <kettenis@gnu.org>2002-07-04 15:13:28 +0000
commitbaadce09a627f7c55659c59a1009a8812111c42a (patch)
tree1c4590a3474d29164c08610a6b892d861cc7c8f9 /gdb
parent2404952e63ce440e3b9896f20256887d9d888c63 (diff)
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* i386bsd-tdep.c (i386nbsd_sigtramp_start, i386nbsd_sigtramp_end):
New variables. (i386nbsd_init_abi): Use these to initialize tdep->sigtramp_start and tdep->sigtramp_end. * i386obsd-nat.c: New file. * config/i386/obsd.mh (NATDEPFILES): Add i386obsd-nat.o.
Diffstat (limited to 'gdb')
-rw-r--r--gdb/ChangeLog7
-rw-r--r--gdb/config/i386/obsd.mh2
-rw-r--r--gdb/i386bsd-tdep.c7
-rw-r--r--gdb/i386obsd-nat.c60
4 files changed, 73 insertions, 3 deletions
diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index d8fab79..f1b38ee 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,5 +1,12 @@
2002-07-04 Mark Kettenis <kettenis@gnu.org>
+ * i386bsd-tdep.c (i386nbsd_sigtramp_start, i386nbsd_sigtramp_end):
+ New variables.
+ (i386nbsd_init_abi): Use these to initialize tdep->sigtramp_start
+ and tdep->sigtramp_end.
+ * i386obsd-nat.c: New file.
+ * config/i386/obsd.mh (NATDEPFILES): Add i386obsd-nat.o.
+
* dwarf2cfi.c (cfi_pop_frame): Use alloca() for regbuf.
Don't call get_current_frame().
diff --git a/gdb/config/i386/obsd.mh b/gdb/config/i386/obsd.mh
index 8a40001..ec22fcb 100644
--- a/gdb/config/i386/obsd.mh
+++ b/gdb/config/i386/obsd.mh
@@ -3,7 +3,7 @@
XM_FILE= xm-i386.h
NAT_FILE= nm-obsd.h
-NATDEPFILES= fork-child.o infptrace.o inftarg.o i386bsd-nat.o \
+NATDEPFILES= fork-child.o infptrace.o inftarg.o i386bsd-nat.o i386obsd-nat.o \
solib.o solib-sunos.o
# The OpenBSD yacc generates yyname and yyrule tables that conflict at
diff --git a/gdb/i386bsd-tdep.c b/gdb/i386bsd-tdep.c
index 61213ff..ea96ee4 100644
--- a/gdb/i386bsd-tdep.c
+++ b/gdb/i386bsd-tdep.c
@@ -113,6 +113,9 @@ i386bsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
/* NetBSD 1.0 or later. */
+CORE_ADDR i386nbsd_sigtramp_start = 0xbfbfdf20;
+CORE_ADDR i386nbsd_sigtramp_end = 0xbfbfdff0;
+
/* From <machine/signal.h>. */
int i386nbsd_sc_pc_offset = 44;
int i386nbsd_sc_sp_offset = 56;
@@ -129,8 +132,8 @@ i386nbsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
tdep->struct_return = reg_struct_return;
/* NetBSD uses a different memory layout. */
- tdep->sigtramp_start = 0xbfbfdf20;
- tdep->sigtramp_end = 0xbfbfdff0;
+ tdep->sigtramp_start = i386nbsd_sigtramp_start;
+ tdep->sigtramp_end = i386nbsd_sigtramp_end;
/* NetBSD has a `struct sigcontext' that's different from the
origional 4.3 BSD. */
diff --git a/gdb/i386obsd-nat.c b/gdb/i386obsd-nat.c
new file mode 100644
index 0000000..01a2bbe
--- /dev/null
+++ b/gdb/i386obsd-nat.c
@@ -0,0 +1,60 @@
+/* Native-dependent code for OpenBSD/i386.
+ Copyright 2002 Free Software Foundation, Inc.
+
+ This file is part of GDB.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+#include "defs.h"
+
+#include <sys/param.h>
+#include <sys/sysctl.h>
+
+/* Prevent warning from -Wmissing-prototypes. */
+void _initialize_i386fbsd_nat (void);
+
+void
+_initialize_i386obsd_nat (void)
+{
+ /* OpenBSD provides a vm.psstrings sysctl that we can use to locate
+ the sigtramp. That way we can still recognize a sigtramp if its
+ location is changed in a new kernel. This is especially
+ important for OpenBSD, since it uses a different memory layout
+ than NetBSD, yet we cannot distinguish between the two.
+
+ Of course this is still based on the assumption that the sigtramp
+ is placed directly under the location where the program arguments
+ and environment can be found. */
+#ifdef VM_PSSTRINGS
+ {
+ struct _ps_strings _ps;
+ int mib[2];
+ size_t len;
+
+ extern CORE_ADDR i386nbsd_sigtramp_start;
+ extern CORE_ADDR i386nbsd_sigtramp_end;
+
+ mib[0] = CTL_VM;
+ mib[1] = VM_PSSTRINGS;
+ len = sizeof (_ps);
+ if (sysctl (mib, 2, &_ps, &len, NULL, 0) == 0)
+ {
+ i386nbsd_sigtramp_start = (CORE_ADDR)_ps.val - 128;
+ i386nbsd_sigtramp_end = (CORE_ADDR)_ps.val;
+ }
+ }
+#endif
+}