X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=gdb%2Fi386bsd-tdep.c;h=1816e12f6b70933f1a5737769079f079a9129d3f;hb=8ea5bce59057ef1906bf1180843c0900b191dcab;hp=a01ed6b89e6fe4faa61bbd9107da18f27dfbdbad;hpb=b724791951f3af34758ac7ea521f5967b3f5e0d8;p=binutils-gdb.git
diff --git a/gdb/i386bsd-tdep.c b/gdb/i386bsd-tdep.c
index a01ed6b89e6..1816e12f6b7 100644
--- a/gdb/i386bsd-tdep.c
+++ b/gdb/i386bsd-tdep.c
@@ -1,11 +1,13 @@
/* Target-dependent code for i386 BSD's.
- Copyright 2001 Free Software Foundation, Inc.
+
+ Copyright (C) 2001, 2002, 2003, 2004, 2007, 2008, 2009, 2010
+ 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
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
@@ -14,71 +16,111 @@
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. */
+ along with this program. If not, see . */
#include "defs.h"
+#include "arch-utils.h"
#include "frame.h"
#include "gdbcore.h"
#include "regcache.h"
+#include "osabi.h"
-/* Support for signal handlers. */
+#include "gdb_string.h"
-/* Range in which to find the signaltramp routine, traditionally found
- on the use stack, just below the user area. Initialized to values
- that work for NetBSD and FreeBSD. */
+#include "i386-tdep.h"
-CORE_ADDR i386bsd_sigtramp_start = 0xbfbfdf20;
-CORE_ADDR i386bsd_sigtramp_end = 0xbfbfdff0;
+/* Support for signal handlers. */
-/* Return whether PC is in a BSD sigtramp routine. */
+/* Assuming THIS_FRAME is for a BSD sigtramp routine, return the
+ address of the associated sigcontext structure. */
-int
-i386bsd_in_sigtramp (CORE_ADDR pc, char *name)
+static CORE_ADDR
+i386bsd_sigcontext_addr (struct frame_info *this_frame)
{
- return (pc >= i386bsd_sigtramp_start && pc < i386bsd_sigtramp_end);
+ struct gdbarch *gdbarch = get_frame_arch (this_frame);
+ enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+ gdb_byte buf[4];
+ CORE_ADDR sp;
+
+ get_frame_register (this_frame, I386_ESP_REGNUM, buf);
+ sp = extract_unsigned_integer (buf, 4, byte_order);
+
+ return read_memory_unsigned_integer (sp + 8, 4, byte_order);
}
+
-/* Offset in the sigcontext structure of the program counter.
- Initialized to the value from 4.4 BSD Lite. */
-int i386bsd_sigcontext_pc_offset = 20;
+/* Support for shared libraries. */
-/* Assuming FRAME is for a BSD sigtramp routine, return the address of
- the associated sigcontext structure. */
+/* Traditional BSD (4.3 BSD, still used for BSDI and 386BSD). */
-static CORE_ADDR
-i386bsd_sigcontext_addr (struct frame_info *frame)
+/* From . */
+int i386bsd_sc_reg_offset[] =
+{
+ -1, /* %eax */
+ -1, /* %ecx */
+ -1, /* %edx */
+ -1, /* %ebx */
+ 8 + 0 * 4, /* %esp */
+ 8 + 1 * 4, /* %ebp */
+ -1, /* %esi */
+ -1, /* %edi */
+ 8 + 3 * 4, /* %eip */
+ 8 + 4 * 4, /* %eflags */
+ -1, /* %cs */
+ -1, /* %ss */
+ -1, /* %ds */
+ -1, /* %es */
+ -1, /* %fs */
+ -1 /* %gs */
+};
+
+void
+i386bsd_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
- if (frame->next)
- /* If this isn't the top frame, the next frame must be for the
- signal handler itself. A pointer to the sigcontext structure
- is passed as the third argument to the signal handler. */
- return read_memory_unsigned_integer (frame->next->frame + 16, 4);
-
- /* This is the top frame. We'll have to find the address of the
- sigcontext structure by looking at the stack pointer. */
- return read_memory_unsigned_integer (read_register (SP_REGNUM) + 8, 4);
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+
+ tdep->jb_pc_offset = 0;
+
+ tdep->sigtramp_start = 0xfdbfdfc0;
+ tdep->sigtramp_end = 0xfdbfe000;
+ tdep->sigcontext_addr = i386bsd_sigcontext_addr;
+ tdep->sc_reg_offset = i386bsd_sc_reg_offset;
+ tdep->sc_num_regs = ARRAY_SIZE (i386bsd_sc_reg_offset);
}
-/* Assuming FRAME is for a BSD sigtramp routine, return the saved
- program counter. */
+
+static enum gdb_osabi
+i386bsd_aout_osabi_sniffer (bfd *abfd)
+{
+ if (strcmp (bfd_get_target (abfd), "a.out-i386-netbsd") == 0)
+ return GDB_OSABI_NETBSD_AOUT;
-static CORE_ADDR
-i386bsd_sigtramp_saved_pc (struct frame_info *frame)
+ if (strcmp (bfd_get_target (abfd), "a.out-i386-freebsd") == 0)
+ return GDB_OSABI_FREEBSD_AOUT;
+
+ return GDB_OSABI_UNKNOWN;
+}
+
+static enum gdb_osabi
+i386bsd_core_osabi_sniffer (bfd *abfd)
{
- CORE_ADDR addr;
- addr = i386bsd_sigcontext_addr (frame);
- return read_memory_unsigned_integer (addr + i386bsd_sigcontext_pc_offset, 4);
+ if (strcmp (bfd_get_target (abfd), "netbsd-core") == 0)
+ return GDB_OSABI_NETBSD_AOUT;
+
+ return GDB_OSABI_UNKNOWN;
}
-/* Return the saved program counter for FRAME. */
+
+/* Provide a prototype to silence -Wmissing-prototypes. */
+void _initialize_i386bsd_tdep (void);
-CORE_ADDR
-i386bsd_frame_saved_pc (struct frame_info *frame)
+void
+_initialize_i386bsd_tdep (void)
{
- if (frame->signal_handler_caller)
- return i386bsd_sigtramp_saved_pc (frame);
+ gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_aout_flavour,
+ i386bsd_aout_osabi_sniffer);
- return read_memory_unsigned_integer (frame->frame + 4, 4);
+ /* BFD doesn't set a flavour for NetBSD style a.out core files. */
+ gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_unknown_flavour,
+ i386bsd_core_osabi_sniffer);
}