diff options
author | Mark Kettenis <kettenis@gnu.org> | 2002-07-04 15:13:28 +0000 |
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committer | Mark Kettenis <kettenis@gnu.org> | 2002-07-04 15:13:28 +0000 |
commit | baadce09a627f7c55659c59a1009a8812111c42a (patch) | |
tree | 1c4590a3474d29164c08610a6b892d861cc7c8f9 /gdb | |
parent | 2404952e63ce440e3b9896f20256887d9d888c63 (diff) | |
download | gdb-baadce09a627f7c55659c59a1009a8812111c42a.zip gdb-baadce09a627f7c55659c59a1009a8812111c42a.tar.gz gdb-baadce09a627f7c55659c59a1009a8812111c42a.tar.bz2 |
* 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/ChangeLog | 7 | ||||
-rw-r--r-- | gdb/config/i386/obsd.mh | 2 | ||||
-rw-r--r-- | gdb/i386bsd-tdep.c | 7 | ||||
-rw-r--r-- | gdb/i386obsd-nat.c | 60 |
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 +} |