142 lines
6 KiB
C
142 lines
6 KiB
C
/* Target definitions for GNU/Linux on ARM, for GDB.
|
|
Copyright 1999, 2000 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
|
|
|
|
#ifdef GDBSERVER
|
|
#define ARM_GNULINUX_TARGET
|
|
#endif
|
|
|
|
/* Include the common ARM target definitions. */
|
|
#include "arm/tm-arm.h"
|
|
|
|
#include "tm-linux.h"
|
|
|
|
/* Use target-specific function to define link map offsets. */
|
|
extern struct link_map_offsets *arm_linux_svr4_fetch_link_map_offsets (void);
|
|
#define SVR4_FETCH_LINK_MAP_OFFSETS() arm_linux_svr4_fetch_link_map_offsets ()
|
|
|
|
#undef CALL_DUMMY_WORDS
|
|
#define CALL_DUMMY_WORDS arm_linux_call_dummy_words
|
|
extern LONGEST arm_linux_call_dummy_words[];
|
|
|
|
/* 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. */
|
|
struct type;
|
|
struct value;
|
|
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))
|
|
|
|
/* Things needed for making the inferior call functions.
|
|
|
|
FIXME: This and arm_push_arguments should be merged. However this
|
|
function breaks on a little endian host, big endian target
|
|
using the COFF file format. ELF is ok.
|
|
|
|
ScottB. */
|
|
|
|
#undef PUSH_ARGUMENTS
|
|
#define PUSH_ARGUMENTS(nargs, args, sp, struct_return, struct_addr) \
|
|
sp = arm_linux_push_arguments ((nargs), (args), (sp), (struct_return), \
|
|
(struct_addr))
|
|
extern CORE_ADDR arm_linux_push_arguments (int, struct value **, CORE_ADDR,
|
|
int, CORE_ADDR);
|
|
|
|
/* The first page is not writeable in ARM GNU/Linux. */
|
|
#undef LOWEST_PC
|
|
#define LOWEST_PC 0x8000
|
|
|
|
/* Define NO_SINGLE_STEP if ptrace(PT_STEP,...) fails to function
|
|
correctly on ARM Linux kernel. 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)
|
|
|
|
/* On ARM GNU/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 GNU/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_linux_skip_solib_resolver (CORE_ADDR pc);
|
|
#define SKIP_SOLIB_RESOLVER arm_linux_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
|
|
|
|
/* When the ARM Linux kernel invokes a signal handler, the return
|
|
address points at a special instruction which'll trap back into
|
|
the kernel. These definitions are used to identify this bit of
|
|
code as a signal trampoline in order to support backtracing
|
|
through calls to signal handlers. */
|
|
|
|
int arm_linux_in_sigtramp (CORE_ADDR pc, char *name);
|
|
#define IN_SIGTRAMP(pc, name) arm_linux_in_sigtramp (pc, name)
|
|
|
|
/* Each OS has different mechanisms for accessing the various
|
|
registers stored in the sigcontext structure. These definitions
|
|
provide a mechanism by which the generic code in arm-tdep.c can
|
|
find the addresses at which various registers are saved at in the
|
|
sigcontext structure. If SIGCONTEXT_REGISTER_ADDRESS is not
|
|
defined, arm-tdep.c will define it to be 0. (See ia64-tdep.c and
|
|
ia64-linux-tdep.c to see what a similar mechanism looks like when
|
|
multi-arched.) */
|
|
|
|
extern CORE_ADDR arm_linux_sigcontext_register_address (CORE_ADDR, CORE_ADDR,
|
|
int);
|
|
#define SIGCONTEXT_REGISTER_ADDRESS arm_linux_sigcontext_register_address
|
|
|
|
#endif /* TM_ARMLINUX_H */
|