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Diffstat (limited to 'gdb/config/arm/tm-linux.h')
| -rw-r--r-- | gdb/config/arm/tm-linux.h | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/gdb/config/arm/tm-linux.h b/gdb/config/arm/tm-linux.h new file mode 100644 index 0000000..27cc0d1 --- /dev/null +++ b/gdb/config/arm/tm-linux.h @@ -0,0 +1,122 @@ +/* Target definitions for GNU/Linux on ARM, for GDB. + Copyright 1999 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. */ + +#ifndef TM_ARMLINUX_H +#define TM_ARMLINUX_H + +/* Include the common ARM target definitions. */ +#include "arm/tm-arm.h" + +#include "tm-linux.h" + +/* Target byte order on ARM Linux is not selectable. */ +#undef TARGET_BYTE_ORDER_SELECTABLE_P +#define TARGET_BYTE_ORDER_SELECTABLE_P 0 + +/* Under ARM Linux the traditional way of performing a breakpoint is to + execute a particular software interrupt, rather than use a particular + undefined instruction to provoke a trap. Upon exection of the software + interrupt the kernel stops the inferior with a SIGTRAP, and wakes the + debugger. Since ARM Linux is little endian, and doesn't support Thumb + at the moment we redefined ARM_LE_BREAKPOINT to use the correct software + interrupt. */ +#undef ARM_LE_BREAKPOINT +#define ARM_LE_BREAKPOINT {0x01,0x00,0x9f,0xef} + +/* This sequence of words used in the CALL_DUMMY are the following + instructions: + + mov lr, pc + mov pc, r4 + swi bkpt_swi + + Note this is 12 bytes. */ + +#undef CALL_DUMMY +#define CALL_DUMMY {0xe1a0e00f, 0xe1a0f004, 0xef9f001} + +/* Extract from an array REGBUF containing the (raw) register state + a function return value of type TYPE, and copy that, in virtual format, + into VALBUF. */ +extern void arm_linux_extract_return_value (struct type *, char[], char *); +#undef EXTRACT_RETURN_VALUE +#define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \ + arm_linux_extract_return_value ((TYPE), (REGBUF), (VALBUF)) + +/* The first page is not writeable in ARM Linux. */ +#define LOWEST_PC 0x8000 + +/* Define NO_SINGLE_STEP if ptrace(PT_STEP,...) fails to function correctly + on ARM Linux. This is the case on 2.0.x kernels, 2.1.x kernels and some + 2.2.x kernels. This will include the implementation of single_step() + in armlinux-tdep.c. See armlinux-ss.c for more details. */ +/* #define NO_SINGLE_STEP 1 */ + +/* Offset to saved PC in sigcontext structure, from <asm/sigcontext.h> */ +#define SIGCONTEXT_PC_OFFSET (sizeof(unsigned long) * 18) + +/* Figure out where the longjmp will land. The code expects that longjmp + has just been entered and the code had not altered the registers, so + the arguments are are still in r0-r1. r0 points at the jmp_buf structure + from which the target pc (JB_PC) is extracted. This pc value is copied + into ADDR. This routine returns true on success */ +extern int arm_get_longjmp_target (CORE_ADDR *); +#define GET_LONGJMP_TARGET(addr) arm_get_longjmp_target (addr) + +/* On ARM Linux, each call to a library routine goes through a small piece + of trampoline code in the ".plt" section. The wait_for_inferior() + routine uses this macro to detect when we have stepped into one of + these fragments. We do not use lookup_solib_trampoline_symbol_by_pc, + because we cannot always find the shared library trampoline symbols. */ +extern int in_plt_section (CORE_ADDR, char *); +#define IN_SOLIB_CALL_TRAMPOLINE(pc, name) in_plt_section((pc), (name)) + +/* On ARM Linux, a call to a library routine does not have to go through + any trampoline code. */ +#define IN_SOLIB_RETURN_TRAMPOLINE(pc, name) 0 + +/* If PC is in a shared library trampoline code, return the PC + where the function itself actually starts. If not, return 0. */ +extern CORE_ADDR find_solib_trampoline_target (CORE_ADDR pc); +#define SKIP_TRAMPOLINE_CODE(pc) find_solib_trampoline_target (pc) + +/* When we call a function in a shared library, and the PLT sends us + into the dynamic linker to find the function's real address, we + need to skip over the dynamic linker call. This function decides + when to skip, and where to skip to. See the comments for + SKIP_SOLIB_RESOLVER at the top of infrun.c. */ +extern CORE_ADDR arm_skip_solib_resolver (CORE_ADDR pc); +#define SKIP_SOLIB_RESOLVER arm_skip_solib_resolver + +/* When we call a function in a shared library, and the PLT sends us + into the dynamic linker to find the function's real address, we + need to skip over the dynamic linker call. This function decides + when to skip, and where to skip to. See the comments for + SKIP_SOLIB_RESOLVER at the top of infrun.c. */ +#if 0 +#undef IN_SOLIB_DYNSYM_RESOLVE_CODE +extern CORE_ADDR arm_in_solib_dynsym_resolve_code (CORE_ADDR pc, char *name); +#define IN_SOLIB_DYNSYM_RESOLVE_CODE arm_in_solib_dynsym_resolve_code +/* ScottB: Current definition is +extern CORE_ADDR in_svr4_dynsym_resolve_code (CORE_ADDR pc, char *name); +#define IN_SOLIB_DYNSYM_RESOLVE_CODE in_svr4_dynsym_resolve_code */ +#endif + +#endif /* TM_ARMLINUX_H */ |