From 0a595803234985c4e8386306f21c2f2720d2e8c7 Mon Sep 17 00:00:00 2001 From: Andreas Schwab Date: Tue, 19 Nov 2002 23:14:45 +0000 Subject: [PATCH] * 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. --- gdb/ChangeLog | 10 ++++ gdb/Makefile.in | 2 + gdb/config/m68k/linux.mt | 2 +- gdb/m68klinux-nat.c | 97 ------------------------------ gdb/m68klinux-tdep.c | 124 +++++++++++++++++++++++++++++++++++++++ 5 files changed, 137 insertions(+), 98 deletions(-) create mode 100644 gdb/m68klinux-tdep.c diff --git a/gdb/ChangeLog b/gdb/ChangeLog index fd0b4623ca..0029b7a66e 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,3 +1,13 @@ +2002-11-19 Andreas Schwab + + * 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 * objc-exp.y: Revert to old skip_quoted usage. diff --git a/gdb/Makefile.in b/gdb/Makefile.in index 6fa9d9bb21..81d8cd335c 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 7598fc5331..42171335aa 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 b2d3a6faa9..b206852677 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 . */ -#define SIGCONTEXT_PC_OFFSET 26 - -/* Offset to saved PC in ucontext, from . */ -#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 0000000000..c4ae867f17 --- /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 . */ +#define SIGCONTEXT_PC_OFFSET 26 + +/* Offset to saved PC in ucontext, from . */ +#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); +} -- 2.34.1