aboutsummaryrefslogtreecommitdiff
path: root/gdb
diff options
context:
space:
mode:
Diffstat (limited to 'gdb')
-rw-r--r--gdb/ChangeLog10
-rw-r--r--gdb/Makefile.in2
-rw-r--r--gdb/config/m68k/linux.mt2
-rw-r--r--gdb/m68klinux-nat.c97
-rw-r--r--gdb/m68klinux-tdep.c124
5 files changed, 137 insertions, 98 deletions
diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index fd0b462..0029b7a 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,13 @@
+2002-11-19 Andreas Schwab <schwab@suse.de>
+
+ * m68klinux-nat.c (IS_SIGTRAMP, IS_RT_SIGTRAMP)
+ (m68k_linux_in_sigtramp, SIGCONTEXT_PC_OFFSET)
+ (UCONTEXT_PC_OFFSET, m68k_linux_sigtramp_saved_pc)
+ (m68k_linux_frame_saved_pc): Move to ...
+ * m68klinux-tdep.c: ... here. New file.
+ * Makefile.in (m68klinux-tdep.o): Add dependencies.
+ * config/m68k/linux.mt (TDEPFILES): Add m68klinux-tdep.o.
+
2002-11-19 Adam Fedor <fedor@gnu.org>
* objc-exp.y: Revert to old skip_quoted usage.
diff --git a/gdb/Makefile.in b/gdb/Makefile.in
index 6fa9d9b..81d8cd3 100644
--- a/gdb/Makefile.in
+++ b/gdb/Makefile.in
@@ -1896,6 +1896,8 @@ m68k-tdep.o: m68k-tdep.c $(defs_h) $(frame_h) $(symtab_h) $(gdbcore_h) \
m68klinux-nat.o: m68klinux-nat.c $(defs_h) $(frame_h) $(inferior_h) \
$(language_h) $(gdbcore_h) $(regcache_h) $(gdb_stat_h) \
$(floatformat_h) $(target_h) $(gregset_h)
+m68klinux-tdep.o: m68klinux-tdep.c $(defs_h) $(gdbcore_h) $(frame_h) \
+ $(target_h)
m68knbsd-nat.o: m68knbsd-nat.c $(defs_h) $(inferior_h) $(gdbcore_h) \
$(regcache_h)
m68knbsd-tdep.o: m68knbsd-tdep.c $(defs_h) $(gdbtypes_h) $(regcache_h)
diff --git a/gdb/config/m68k/linux.mt b/gdb/config/m68k/linux.mt
index 7598fc5..4217133 100644
--- a/gdb/config/m68k/linux.mt
+++ b/gdb/config/m68k/linux.mt
@@ -1,3 +1,3 @@
# Target: Motorola m68k with a.out and ELF
-TDEPFILES= m68k-tdep.o solib.o solib-svr4.o solib-legacy.o
+TDEPFILES= m68k-tdep.o m68klinux-tdep.o solib.o solib-svr4.o solib-legacy.o
TM_FILE= tm-linux.h
diff --git a/gdb/m68klinux-nat.c b/gdb/m68klinux-nat.c
index b2d3a6f..b206852 100644
--- a/gdb/m68klinux-nat.c
+++ b/gdb/m68klinux-nat.c
@@ -594,103 +594,6 @@ kernel_u_size (void)
return (sizeof (struct user));
}
-/* Check whether insn1 and insn2 are parts of a signal trampoline. */
-
-#define IS_SIGTRAMP(insn1, insn2) \
- (/* addaw #20,sp; moveq #119,d0; trap #0 */ \
- (insn1 == 0xdefc0014 && insn2 == 0x70774e40) \
- /* moveq #119,d0; trap #0 */ \
- || insn1 == 0x70774e40)
-
-#define IS_RT_SIGTRAMP(insn1, insn2) \
- (/* movel #173,d0; trap #0 */ \
- (insn1 == 0x203c0000 && insn2 == 0x00ad4e40) \
- /* moveq #82,d0; notb d0; trap #0 */ \
- || (insn1 == 0x70524600 && (insn2 >> 16) == 0x4e40))
-
-/* Return non-zero if PC points into the signal trampoline. For the sake
- of m68k_linux_frame_saved_pc we also distinguish between non-RT and RT
- signal trampolines. */
-
-int
-m68k_linux_in_sigtramp (CORE_ADDR pc)
-{
- CORE_ADDR sp;
- char buf[12];
- unsigned long insn0, insn1, insn2;
-
- if (read_memory_nobpt (pc - 4, buf, sizeof (buf)))
- return 0;
- insn1 = extract_unsigned_integer (buf + 4, 4);
- insn2 = extract_unsigned_integer (buf + 8, 4);
- if (IS_SIGTRAMP (insn1, insn2))
- return 1;
- if (IS_RT_SIGTRAMP (insn1, insn2))
- return 2;
-
- insn0 = extract_unsigned_integer (buf, 4);
- if (IS_SIGTRAMP (insn0, insn1))
- return 1;
- if (IS_RT_SIGTRAMP (insn0, insn1))
- return 2;
-
- insn0 = (insn0 << 16) | (insn1 >> 16);
- insn1 = (insn1 << 16) | (insn2 >> 16);
- if (IS_SIGTRAMP (insn0, insn1))
- return 1;
- if (IS_RT_SIGTRAMP (insn0, insn1))
- return 2;
-
- return 0;
-}
-
-/* Offset to saved PC in sigcontext, from <asm/sigcontext.h>. */
-#define SIGCONTEXT_PC_OFFSET 26
-
-/* Offset to saved PC in ucontext, from <asm/ucontext.h>. */
-#define UCONTEXT_PC_OFFSET 88
-
-/* Get saved user PC for sigtramp from sigcontext or ucontext. */
-
-static CORE_ADDR
-m68k_linux_sigtramp_saved_pc (struct frame_info *frame)
-{
- CORE_ADDR sigcontext_addr;
- char buf[TARGET_PTR_BIT / TARGET_CHAR_BIT];
- int ptrbytes = TARGET_PTR_BIT / TARGET_CHAR_BIT;
- int sigcontext_offs = (2 * TARGET_INT_BIT) / TARGET_CHAR_BIT;
-
- /* Get sigcontext address, it is the third parameter on the stack. */
- if (frame->next)
- sigcontext_addr = read_memory_integer (FRAME_ARGS_ADDRESS (frame->next)
- + FRAME_ARGS_SKIP
- + sigcontext_offs,
- ptrbytes);
- else
- sigcontext_addr = read_memory_integer (read_register (SP_REGNUM)
- + sigcontext_offs,
- ptrbytes);
-
- /* Don't cause a memory_error when accessing sigcontext in case the
- stack layout has changed or the stack is corrupt. */
- if (m68k_linux_in_sigtramp (frame->pc) == 2)
- target_read_memory (sigcontext_addr + UCONTEXT_PC_OFFSET, buf, ptrbytes);
- else
- target_read_memory (sigcontext_addr + SIGCONTEXT_PC_OFFSET, buf, ptrbytes);
- return extract_unsigned_integer (buf, ptrbytes);
-}
-
-/* Return the saved program counter for FRAME. */
-
-CORE_ADDR
-m68k_linux_frame_saved_pc (struct frame_info *frame)
-{
- if ((get_frame_type (frame) == SIGTRAMP_FRAME))
- return m68k_linux_sigtramp_saved_pc (frame);
-
- return read_memory_integer (frame->frame + 4, 4);
-}
-
/* Register that we are able to handle GNU/Linux ELF core file
formats. */
diff --git a/gdb/m68klinux-tdep.c b/gdb/m68klinux-tdep.c
new file mode 100644
index 0000000..c4ae867
--- /dev/null
+++ b/gdb/m68klinux-tdep.c
@@ -0,0 +1,124 @@
+/* Motorola m68k target-dependent support for GNU/Linux.
+
+ Copyright 1996, 1998, 2000, 2001, 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 "gdbcore.h"
+#include "frame.h"
+#include "target.h"
+
+
+/* Check whether insn1 and insn2 are parts of a signal trampoline. */
+
+#define IS_SIGTRAMP(insn1, insn2) \
+ (/* addaw #20,sp; moveq #119,d0; trap #0 */ \
+ (insn1 == 0xdefc0014 && insn2 == 0x70774e40) \
+ /* moveq #119,d0; trap #0 */ \
+ || insn1 == 0x70774e40)
+
+#define IS_RT_SIGTRAMP(insn1, insn2) \
+ (/* movel #173,d0; trap #0 */ \
+ (insn1 == 0x203c0000 && insn2 == 0x00ad4e40) \
+ /* moveq #82,d0; notb d0; trap #0 */ \
+ || (insn1 == 0x70524600 && (insn2 >> 16) == 0x4e40))
+
+/* Return non-zero if PC points into the signal trampoline. For the sake
+ of m68k_linux_frame_saved_pc we also distinguish between non-RT and RT
+ signal trampolines. */
+
+int
+m68k_linux_in_sigtramp (CORE_ADDR pc)
+{
+ CORE_ADDR sp;
+ char buf[12];
+ unsigned long insn0, insn1, insn2;
+
+ if (read_memory_nobpt (pc - 4, buf, sizeof (buf)))
+ return 0;
+ insn1 = extract_unsigned_integer (buf + 4, 4);
+ insn2 = extract_unsigned_integer (buf + 8, 4);
+ if (IS_SIGTRAMP (insn1, insn2))
+ return 1;
+ if (IS_RT_SIGTRAMP (insn1, insn2))
+ return 2;
+
+ insn0 = extract_unsigned_integer (buf, 4);
+ if (IS_SIGTRAMP (insn0, insn1))
+ return 1;
+ if (IS_RT_SIGTRAMP (insn0, insn1))
+ return 2;
+
+ insn0 = (insn0 << 16) | (insn1 >> 16);
+ insn1 = (insn1 << 16) | (insn2 >> 16);
+ if (IS_SIGTRAMP (insn0, insn1))
+ return 1;
+ if (IS_RT_SIGTRAMP (insn0, insn1))
+ return 2;
+
+ return 0;
+}
+
+/* Offset to saved PC in sigcontext, from <asm/sigcontext.h>. */
+#define SIGCONTEXT_PC_OFFSET 26
+
+/* Offset to saved PC in ucontext, from <asm/ucontext.h>. */
+#define UCONTEXT_PC_OFFSET 88
+
+/* Get saved user PC for sigtramp from sigcontext or ucontext. */
+
+static CORE_ADDR
+m68k_linux_sigtramp_saved_pc (struct frame_info *frame)
+{
+ CORE_ADDR sigcontext_addr;
+ char buf[TARGET_PTR_BIT / TARGET_CHAR_BIT];
+ int ptrbytes = TARGET_PTR_BIT / TARGET_CHAR_BIT;
+ int sigcontext_offs = (2 * TARGET_INT_BIT) / TARGET_CHAR_BIT;
+
+ /* Get sigcontext address, it is the third parameter on the stack. */
+ if (frame->next)
+ sigcontext_addr = read_memory_integer (FRAME_ARGS_ADDRESS (frame->next)
+ + FRAME_ARGS_SKIP
+ + sigcontext_offs,
+ ptrbytes);
+ else
+ sigcontext_addr = read_memory_integer (read_register (SP_REGNUM)
+ + sigcontext_offs,
+ ptrbytes);
+
+ /* Don't cause a memory_error when accessing sigcontext in case the
+ stack layout has changed or the stack is corrupt. */
+ if (m68k_linux_in_sigtramp (frame->pc) == 2)
+ target_read_memory (sigcontext_addr + UCONTEXT_PC_OFFSET, buf, ptrbytes);
+ else
+ target_read_memory (sigcontext_addr + SIGCONTEXT_PC_OFFSET, buf, ptrbytes);
+ return extract_unsigned_integer (buf, ptrbytes);
+}
+
+/* Return the saved program counter for FRAME. */
+
+CORE_ADDR
+m68k_linux_frame_saved_pc (struct frame_info *frame)
+{
+ if (get_frame_type (frame) == SIGTRAMP_FRAME)
+ return m68k_linux_sigtramp_saved_pc (frame);
+
+ return read_memory_integer (frame->frame + 4, 4);
+}
generated by cgit v1.1 at 2024-12-24 12:25:36 +0000