2000-04-05 17:38:05 +02:00
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/* GNU/Linux on ARM target support.
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2003-01-05 00:38:46 +01:00
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Copyright 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
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2000-04-05 17:38:05 +02:00
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include "defs.h"
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2000-04-05 19:24:08 +02:00
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#include "target.h"
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#include "value.h"
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2000-04-05 17:38:05 +02:00
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#include "gdbtypes.h"
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2000-04-08 00:26:11 +02:00
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#include "floatformat.h"
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2000-09-06 02:39:11 +02:00
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#include "gdbcore.h"
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#include "frame.h"
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2001-03-01 02:39:22 +01:00
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#include "regcache.h"
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* defs.h (HOST_FLOAT_FORMAT, HOST_DOUBLE_FORMAT)
(HOST_FLOAT_FORMAT, HOST_DOUBLE_FORMAT)
(HOST_LONG_DOUBLE_FORMAT, DOUBLEST)
(floatformat_to_doublest, floatformat_from_doublest)
(floatformat_is_negative, floatformat_is_nan)
(floatformat_mantissa, store_floating)
(extract_floating): Move declaration from here.
* doublest.h: To here. New file.
* utils.c (get_field, floatformat_to_doublest, put_field)
(ldfrexp, floatformat_from_doublest, floatformat_is_negative)
(floatformat_is_nan, floatformat_mantissa)
(FLOATFORMAT_CHAR_BIT): Move from here.
* doublest.c: To here. New file.
* findvar.c (store_floating, extract_floating): Move from here.
* doublest.c: To here.
* Makefile.in (SFILES): Add doublest.c.
(COMMON_OBS): Add doublest.o.
(doublest.o): Specify dependencies.
(doublest_h): Define.
* config/m88k/tm-m88k.h: Include "doublest.h".
* config/i960/tm-i960.h: Ditto.
* config/i386/tm-symmetry.h: Ditto.
* rs6000-tdep.c, valarith.c: Ditto.
* valprint.c, stabsread.c, sh-tdep.c: Ditto.
* ia64-tdep.c, i387-tdep.c, i386-tdep.c: Ditto.
* values.c, arm-tdep.c, arm-linux-tdep.c: Ditto.
* alpha-tdep.c, ax.h, expression.h: Ditto.
* sh-tdep.c, parse.c, top.c, value.h: Ditto.
* Makefile.in (arm-tdep.o): Add $(doublest_h).
(i386-tdep.o, i387-tdep.o, ia64-tdep.o): Ditto.
(rs6000-tdep.o, stabsread.o, valarith.o): Ditto.
(values.o, valprint.o, arm-linux-tdep.o): Ditto.
(alpha-tdep.o, ax_h, parse.o, top.o, value_h): Ditto.
(parser_defs_h): Ditto.
(expression_h): Add $(doublest_h) and $(symtab_h).
2001-08-01 20:39:27 +02:00
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#include "doublest.h"
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2003-01-05 00:38:46 +01:00
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#include "osabi.h"
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2000-04-05 17:38:05 +02:00
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* arm-tdep.h: New file.
* arm-tdep.c: Include arm-tdep.h.
(arm_addr_bits_remove, arm_smash_text_address, arm_saved_pc_after_call)
(arm_skip_prologue, arm_call_dummy_words, arm_fix_call_dummy)
(arm_print_float_info, arm_register_type, convert_to_extended)
(arm_elf_make_msymbols_special, arm_coff_make_msymbol_special)
(arm_extract_return_value, arm_register_name): Make static.
(arm_software_single_step): Similarly. Fix types in declaration.
(arm_register_byte, arm_register_raw_size, arm_register_virtual_size)
(arm_store_return_value, arm_store_struct_return): New functions.
(arm_gdbarch_init): Register the above functions. Also register
call_dummy_start_offset, sizeof_call_dummy_words,
function_start_offset, inner_than, decr_pc_after_break, fp_regnum,
sp_regnum, pc_regnum, register_bytes, num_regs, max_register_raw_size,
max_register_virtual_size, register_size. Set up
prologue_cache.saved_regs here, rather than ...
(_initialize_arm_tdep): ... here.
* config/arm/tm-arm.h (struct type, struct value): Delete forward
declarations.
(arm_addr_bits_remove, arm_smash_text_address, arm_saved_pc_after_call)
(arm_skip_prologue, arm_call_dummy_words, arm_fix_call_dummy)
(arm_print_float_info, arm_register_type, convert_to_extended)
(arm_elf_make_msymbols_special, arm_coff_make_msymbol_special)
(arm_extract_return_value, arm_register_name): Delete declarations.
(SMASH_TEXT_ADDRESS, ADDR_BITS_REMOVE, FUNCTION_START_OFFSET)
(SKIP_PROLOGUE, SAVED_PC_AFTER_CALL, INNER_THAN, BREAKPOINT_FROM_PC)
(DECR_PC_AFTER_BREAK, PRINT_FLOAT_INFO, REGISTER_SIZE, NUM_REGS)
(REGISTER_NAME, REGISTER_BYTES, REGISTER_BYTE, REGISTER_RAW_SIZE)
(REGISTER_VIRTUAL_SIZE, MAX_REGISTER_RAW_SIZE)
(MAX_REGISTER_VIRTUAL_SIZE, REGISTER_VIRTUAL_TYPE, STORE_STRUCT_RETURN)
(EXTRACT_RETURN_VALUE, STORE_RETURN_VALUE, CALL_DUMMY_WORDS)
(SIZEOF_CALL_DUMMY_WORDS, CALL_DUMMY_START_OFFSET, FIX_CALL_DUMMY)
(SOFTWARE_SINGLE_STEP_P, SOFTWARE_SINGLE_STEP)
(ELF_MAKE_MSYMBOL_SPECIAL, COFF_MAKE_MSYMBOL_SPECIAL) Delete.
(arm_pc_is_thumb, arm_pc_is_thumb_dummy, thumb_get_next_pc)
(arm_get_next_pc): No-longer static -- these are needed by the RDI
interface.
* arm-linux-nat.c arm-linux-tdep.c armnbsd-nat.c: Include arm-tdep.h.
* remote-rdi.c remote-rdp.c: Likewise.
* Makefile.in (arm-linux-nat.o, arm-linux-tdep.o arm-tdep.o)
(armnbsd-nat.o, remote-rdi.o, remote_rdp.o): Update dependencies.
* config/arm/tm-nbsd.h (SOFTWARE_SINGLE_STEP_P): Delete bogus
definition.
* arm-tdep.h (ARM_A1_REGNUM, ARM_A4_REGNUM, ARM_AP_REGNUM)
(ARM_SP_REGNUM, ARM_LR_REGNUM, ARM_PC_REGNUM, ARM_F0_REGNUM)
(ARM_F3_REGNUM, ARM_F7_REGNUM, ARM_FPS_REGNUM, ARM_PS_REGNUM): Renamed
from non-ARM_ prefixed definitions.
* arm-tdep.c armnbsd-nat.c arm-linux-nat.c arm-linux-tdep.c: Update
all uses of above.
* remote-rdi.c remote-rdp.c: Likewise.
* arm-linux-nat.c (ARM_CPSR_REGNUM): Renamed from CPSR_REGNUM.
2002-02-11 19:34:12 +01:00
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#include "arm-tdep.h"
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2002-02-23 23:17:12 +01:00
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/* For shared library handling. */
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2000-05-25 20:24:33 +02:00
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#include "symtab.h"
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#include "symfile.h"
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#include "objfiles.h"
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2002-02-19 15:29:00 +01:00
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/* Under ARM GNU/Linux the traditional way of performing a breakpoint
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is to execute a particular software interrupt, rather than use a
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particular undefined instruction to provoke a trap. Upon exection
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of the software interrupt the kernel stops the inferior with a
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SIGTRAP, and wakes the debugger. Since ARM GNU/Linux is little
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endian, and doesn't support Thumb at the moment we only override
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the ARM little-endian breakpoint. */
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2002-02-15 17:12:24 +01:00
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static const char arm_linux_arm_le_breakpoint[] = {0x01,0x00,0x9f,0xef};
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2002-01-30 17:35:51 +01:00
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/* CALL_DUMMY_WORDS:
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This sequence of words is the instructions
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mov lr, pc
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mov pc, r4
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swi bkpt_swi
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Note this is 12 bytes. */
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LONGEST arm_linux_call_dummy_words[] =
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{
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0xe1a0e00f, 0xe1a0f004, 0xef9f001
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};
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2002-02-18 14:35:31 +01:00
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/* Description of the longjmp buffer. */
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2002-05-15 14:29:41 +02:00
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#define ARM_LINUX_JB_ELEMENT_SIZE INT_REGISTER_RAW_SIZE
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#define ARM_LINUX_JB_PC 21
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2000-04-05 17:38:05 +02:00
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/* Extract from an array REGBUF containing the (raw) register state
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a function return value of type TYPE, and copy that, in virtual format,
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into VALBUF. */
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2002-02-23 18:07:57 +01:00
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/* FIXME rearnsha/2002-02-23: This function shouldn't be necessary.
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The ARM generic one should be able to handle the model used by
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linux and the low-level formatting of the registers should be
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hidden behind the regcache abstraction. */
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static void
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2000-04-05 17:38:05 +02:00
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arm_linux_extract_return_value (struct type *type,
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char regbuf[REGISTER_BYTES],
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char *valbuf)
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{
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/* ScottB: This needs to be looked at to handle the different
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2002-02-19 15:29:00 +01:00
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floating point emulators on ARM GNU/Linux. Right now the code
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2000-04-05 17:38:05 +02:00
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assumes that fetch inferior registers does the right thing for
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GDB. I suspect this won't handle NWFPE registers correctly, nor
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will the default ARM version (arm_extract_return_value()). */
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* arm-tdep.h: New file.
* arm-tdep.c: Include arm-tdep.h.
(arm_addr_bits_remove, arm_smash_text_address, arm_saved_pc_after_call)
(arm_skip_prologue, arm_call_dummy_words, arm_fix_call_dummy)
(arm_print_float_info, arm_register_type, convert_to_extended)
(arm_elf_make_msymbols_special, arm_coff_make_msymbol_special)
(arm_extract_return_value, arm_register_name): Make static.
(arm_software_single_step): Similarly. Fix types in declaration.
(arm_register_byte, arm_register_raw_size, arm_register_virtual_size)
(arm_store_return_value, arm_store_struct_return): New functions.
(arm_gdbarch_init): Register the above functions. Also register
call_dummy_start_offset, sizeof_call_dummy_words,
function_start_offset, inner_than, decr_pc_after_break, fp_regnum,
sp_regnum, pc_regnum, register_bytes, num_regs, max_register_raw_size,
max_register_virtual_size, register_size. Set up
prologue_cache.saved_regs here, rather than ...
(_initialize_arm_tdep): ... here.
* config/arm/tm-arm.h (struct type, struct value): Delete forward
declarations.
(arm_addr_bits_remove, arm_smash_text_address, arm_saved_pc_after_call)
(arm_skip_prologue, arm_call_dummy_words, arm_fix_call_dummy)
(arm_print_float_info, arm_register_type, convert_to_extended)
(arm_elf_make_msymbols_special, arm_coff_make_msymbol_special)
(arm_extract_return_value, arm_register_name): Delete declarations.
(SMASH_TEXT_ADDRESS, ADDR_BITS_REMOVE, FUNCTION_START_OFFSET)
(SKIP_PROLOGUE, SAVED_PC_AFTER_CALL, INNER_THAN, BREAKPOINT_FROM_PC)
(DECR_PC_AFTER_BREAK, PRINT_FLOAT_INFO, REGISTER_SIZE, NUM_REGS)
(REGISTER_NAME, REGISTER_BYTES, REGISTER_BYTE, REGISTER_RAW_SIZE)
(REGISTER_VIRTUAL_SIZE, MAX_REGISTER_RAW_SIZE)
(MAX_REGISTER_VIRTUAL_SIZE, REGISTER_VIRTUAL_TYPE, STORE_STRUCT_RETURN)
(EXTRACT_RETURN_VALUE, STORE_RETURN_VALUE, CALL_DUMMY_WORDS)
(SIZEOF_CALL_DUMMY_WORDS, CALL_DUMMY_START_OFFSET, FIX_CALL_DUMMY)
(SOFTWARE_SINGLE_STEP_P, SOFTWARE_SINGLE_STEP)
(ELF_MAKE_MSYMBOL_SPECIAL, COFF_MAKE_MSYMBOL_SPECIAL) Delete.
(arm_pc_is_thumb, arm_pc_is_thumb_dummy, thumb_get_next_pc)
(arm_get_next_pc): No-longer static -- these are needed by the RDI
interface.
* arm-linux-nat.c arm-linux-tdep.c armnbsd-nat.c: Include arm-tdep.h.
* remote-rdi.c remote-rdp.c: Likewise.
* Makefile.in (arm-linux-nat.o, arm-linux-tdep.o arm-tdep.o)
(armnbsd-nat.o, remote-rdi.o, remote_rdp.o): Update dependencies.
* config/arm/tm-nbsd.h (SOFTWARE_SINGLE_STEP_P): Delete bogus
definition.
* arm-tdep.h (ARM_A1_REGNUM, ARM_A4_REGNUM, ARM_AP_REGNUM)
(ARM_SP_REGNUM, ARM_LR_REGNUM, ARM_PC_REGNUM, ARM_F0_REGNUM)
(ARM_F3_REGNUM, ARM_F7_REGNUM, ARM_FPS_REGNUM, ARM_PS_REGNUM): Renamed
from non-ARM_ prefixed definitions.
* arm-tdep.c armnbsd-nat.c arm-linux-nat.c arm-linux-tdep.c: Update
all uses of above.
* remote-rdi.c remote-rdp.c: Likewise.
* arm-linux-nat.c (ARM_CPSR_REGNUM): Renamed from CPSR_REGNUM.
2002-02-11 19:34:12 +01:00
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int regnum = ((TYPE_CODE_FLT == TYPE_CODE (type))
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? ARM_F0_REGNUM : ARM_A1_REGNUM);
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2000-04-05 17:38:05 +02:00
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memcpy (valbuf, ®buf[REGISTER_BYTE (regnum)], TYPE_LENGTH (type));
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}
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2000-04-08 00:26:11 +02:00
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/* Note: ScottB
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This function does not support passing parameters using the FPA
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variant of the APCS. It passes any floating point arguments in the
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general registers and/or on the stack.
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FIXME: This and arm_push_arguments should be merged. However this
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function breaks on a little endian host, big endian target
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using the COFF file format. ELF is ok.
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ScottB. */
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/* Addresses for calling Thumb functions have the bit 0 set.
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Here are some macros to test, set, or clear bit 0 of addresses. */
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#define IS_THUMB_ADDR(addr) ((addr) & 1)
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#define MAKE_THUMB_ADDR(addr) ((addr) | 1)
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#define UNMAKE_THUMB_ADDR(addr) ((addr) & ~1)
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2002-02-23 18:07:57 +01:00
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static CORE_ADDR
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2001-07-15 22:10:02 +02:00
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arm_linux_push_arguments (int nargs, struct value **args, CORE_ADDR sp,
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2000-04-08 00:26:11 +02:00
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int struct_return, CORE_ADDR struct_addr)
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{
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char *fp;
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int argnum, argreg, nstack_size;
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/* Walk through the list of args and determine how large a temporary
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stack is required. Need to take care here as structs may be
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passed on the stack, and we have to to push them. */
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nstack_size = -4 * REGISTER_SIZE; /* Some arguments go into A1-A4. */
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if (struct_return) /* The struct address goes in A1. */
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nstack_size += REGISTER_SIZE;
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/* Walk through the arguments and add their size to nstack_size. */
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for (argnum = 0; argnum < nargs; argnum++)
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{
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int len;
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struct type *arg_type;
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arg_type = check_typedef (VALUE_TYPE (args[argnum]));
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len = TYPE_LENGTH (arg_type);
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/* ANSI C code passes float arguments as integers, K&R code
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passes float arguments as doubles. Correct for this here. */
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if (TYPE_CODE_FLT == TYPE_CODE (arg_type) && REGISTER_SIZE == len)
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nstack_size += FP_REGISTER_VIRTUAL_SIZE;
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else
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nstack_size += len;
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}
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/* Allocate room on the stack, and initialize our stack frame
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pointer. */
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fp = NULL;
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if (nstack_size > 0)
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{
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sp -= nstack_size;
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fp = (char *) sp;
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}
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/* Initialize the integer argument register pointer. */
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* arm-tdep.h: New file.
* arm-tdep.c: Include arm-tdep.h.
(arm_addr_bits_remove, arm_smash_text_address, arm_saved_pc_after_call)
(arm_skip_prologue, arm_call_dummy_words, arm_fix_call_dummy)
(arm_print_float_info, arm_register_type, convert_to_extended)
(arm_elf_make_msymbols_special, arm_coff_make_msymbol_special)
(arm_extract_return_value, arm_register_name): Make static.
(arm_software_single_step): Similarly. Fix types in declaration.
(arm_register_byte, arm_register_raw_size, arm_register_virtual_size)
(arm_store_return_value, arm_store_struct_return): New functions.
(arm_gdbarch_init): Register the above functions. Also register
call_dummy_start_offset, sizeof_call_dummy_words,
function_start_offset, inner_than, decr_pc_after_break, fp_regnum,
sp_regnum, pc_regnum, register_bytes, num_regs, max_register_raw_size,
max_register_virtual_size, register_size. Set up
prologue_cache.saved_regs here, rather than ...
(_initialize_arm_tdep): ... here.
* config/arm/tm-arm.h (struct type, struct value): Delete forward
declarations.
(arm_addr_bits_remove, arm_smash_text_address, arm_saved_pc_after_call)
(arm_skip_prologue, arm_call_dummy_words, arm_fix_call_dummy)
(arm_print_float_info, arm_register_type, convert_to_extended)
(arm_elf_make_msymbols_special, arm_coff_make_msymbol_special)
(arm_extract_return_value, arm_register_name): Delete declarations.
(SMASH_TEXT_ADDRESS, ADDR_BITS_REMOVE, FUNCTION_START_OFFSET)
(SKIP_PROLOGUE, SAVED_PC_AFTER_CALL, INNER_THAN, BREAKPOINT_FROM_PC)
(DECR_PC_AFTER_BREAK, PRINT_FLOAT_INFO, REGISTER_SIZE, NUM_REGS)
(REGISTER_NAME, REGISTER_BYTES, REGISTER_BYTE, REGISTER_RAW_SIZE)
(REGISTER_VIRTUAL_SIZE, MAX_REGISTER_RAW_SIZE)
(MAX_REGISTER_VIRTUAL_SIZE, REGISTER_VIRTUAL_TYPE, STORE_STRUCT_RETURN)
(EXTRACT_RETURN_VALUE, STORE_RETURN_VALUE, CALL_DUMMY_WORDS)
(SIZEOF_CALL_DUMMY_WORDS, CALL_DUMMY_START_OFFSET, FIX_CALL_DUMMY)
(SOFTWARE_SINGLE_STEP_P, SOFTWARE_SINGLE_STEP)
(ELF_MAKE_MSYMBOL_SPECIAL, COFF_MAKE_MSYMBOL_SPECIAL) Delete.
(arm_pc_is_thumb, arm_pc_is_thumb_dummy, thumb_get_next_pc)
(arm_get_next_pc): No-longer static -- these are needed by the RDI
interface.
* arm-linux-nat.c arm-linux-tdep.c armnbsd-nat.c: Include arm-tdep.h.
* remote-rdi.c remote-rdp.c: Likewise.
* Makefile.in (arm-linux-nat.o, arm-linux-tdep.o arm-tdep.o)
(armnbsd-nat.o, remote-rdi.o, remote_rdp.o): Update dependencies.
* config/arm/tm-nbsd.h (SOFTWARE_SINGLE_STEP_P): Delete bogus
definition.
* arm-tdep.h (ARM_A1_REGNUM, ARM_A4_REGNUM, ARM_AP_REGNUM)
(ARM_SP_REGNUM, ARM_LR_REGNUM, ARM_PC_REGNUM, ARM_F0_REGNUM)
(ARM_F3_REGNUM, ARM_F7_REGNUM, ARM_FPS_REGNUM, ARM_PS_REGNUM): Renamed
from non-ARM_ prefixed definitions.
* arm-tdep.c armnbsd-nat.c arm-linux-nat.c arm-linux-tdep.c: Update
all uses of above.
* remote-rdi.c remote-rdp.c: Likewise.
* arm-linux-nat.c (ARM_CPSR_REGNUM): Renamed from CPSR_REGNUM.
2002-02-11 19:34:12 +01:00
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argreg = ARM_A1_REGNUM;
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2000-04-08 00:26:11 +02:00
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|
|
/* The struct_return pointer occupies the first parameter passing
|
|
|
|
register. */
|
|
|
|
if (struct_return)
|
|
|
|
write_register (argreg++, struct_addr);
|
|
|
|
|
|
|
|
/* Process arguments from left to right. Store as many as allowed
|
|
|
|
in the parameter passing registers (A1-A4), and save the rest on
|
|
|
|
the temporary stack. */
|
|
|
|
for (argnum = 0; argnum < nargs; argnum++)
|
|
|
|
{
|
|
|
|
int len;
|
|
|
|
char *val;
|
|
|
|
CORE_ADDR regval;
|
|
|
|
enum type_code typecode;
|
|
|
|
struct type *arg_type, *target_type;
|
|
|
|
|
|
|
|
arg_type = check_typedef (VALUE_TYPE (args[argnum]));
|
|
|
|
target_type = TYPE_TARGET_TYPE (arg_type);
|
|
|
|
len = TYPE_LENGTH (arg_type);
|
|
|
|
typecode = TYPE_CODE (arg_type);
|
|
|
|
val = (char *) VALUE_CONTENTS (args[argnum]);
|
|
|
|
|
|
|
|
/* ANSI C code passes float arguments as integers, K&R code
|
|
|
|
passes float arguments as doubles. The .stabs record for
|
|
|
|
for ANSI prototype floating point arguments records the
|
|
|
|
type as FP_INTEGER, while a K&R style (no prototype)
|
|
|
|
.stabs records the type as FP_FLOAT. In this latter case
|
|
|
|
the compiler converts the float arguments to double before
|
|
|
|
calling the function. */
|
|
|
|
if (TYPE_CODE_FLT == typecode && REGISTER_SIZE == len)
|
|
|
|
{
|
|
|
|
DOUBLEST dblval;
|
2001-08-21 06:31:32 +02:00
|
|
|
dblval = extract_floating (val, len);
|
2000-04-08 00:26:11 +02:00
|
|
|
len = TARGET_DOUBLE_BIT / TARGET_CHAR_BIT;
|
2001-08-21 06:31:32 +02:00
|
|
|
val = alloca (len);
|
|
|
|
store_floating (val, len, dblval);
|
2000-04-08 00:26:11 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
/* If the argument is a pointer to a function, and it is a Thumb
|
|
|
|
function, set the low bit of the pointer. */
|
|
|
|
if (TYPE_CODE_PTR == typecode
|
|
|
|
&& NULL != target_type
|
|
|
|
&& TYPE_CODE_FUNC == TYPE_CODE (target_type))
|
|
|
|
{
|
|
|
|
CORE_ADDR regval = extract_address (val, len);
|
|
|
|
if (arm_pc_is_thumb (regval))
|
|
|
|
store_address (val, len, MAKE_THUMB_ADDR (regval));
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Copy the argument to general registers or the stack in
|
|
|
|
register-sized pieces. Large arguments are split between
|
|
|
|
registers and stack. */
|
|
|
|
while (len > 0)
|
|
|
|
{
|
|
|
|
int partial_len = len < REGISTER_SIZE ? len : REGISTER_SIZE;
|
|
|
|
|
|
|
|
if (argreg <= ARM_LAST_ARG_REGNUM)
|
|
|
|
{
|
|
|
|
/* It's an argument being passed in a general register. */
|
|
|
|
regval = extract_address (val, partial_len);
|
|
|
|
write_register (argreg++, regval);
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
/* Push the arguments onto the stack. */
|
|
|
|
write_memory ((CORE_ADDR) fp, val, REGISTER_SIZE);
|
|
|
|
fp += REGISTER_SIZE;
|
|
|
|
}
|
|
|
|
|
|
|
|
len -= partial_len;
|
|
|
|
val += partial_len;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Return adjusted stack pointer. */
|
|
|
|
return sp;
|
|
|
|
}
|
|
|
|
|
2000-04-10 23:02:33 +02:00
|
|
|
/*
|
2002-02-19 15:29:00 +01:00
|
|
|
Dynamic Linking on ARM GNU/Linux
|
|
|
|
--------------------------------
|
2000-04-10 23:02:33 +02:00
|
|
|
|
|
|
|
Note: PLT = procedure linkage table
|
|
|
|
GOT = global offset table
|
|
|
|
|
|
|
|
As much as possible, ELF dynamic linking defers the resolution of
|
|
|
|
jump/call addresses until the last minute. The technique used is
|
|
|
|
inspired by the i386 ELF design, and is based on the following
|
|
|
|
constraints.
|
|
|
|
|
|
|
|
1) The calling technique should not force a change in the assembly
|
|
|
|
code produced for apps; it MAY cause changes in the way assembly
|
|
|
|
code is produced for position independent code (i.e. shared
|
|
|
|
libraries).
|
|
|
|
|
|
|
|
2) The technique must be such that all executable areas must not be
|
|
|
|
modified; and any modified areas must not be executed.
|
|
|
|
|
|
|
|
To do this, there are three steps involved in a typical jump:
|
|
|
|
|
|
|
|
1) in the code
|
|
|
|
2) through the PLT
|
|
|
|
3) using a pointer from the GOT
|
|
|
|
|
|
|
|
When the executable or library is first loaded, each GOT entry is
|
|
|
|
initialized to point to the code which implements dynamic name
|
|
|
|
resolution and code finding. This is normally a function in the
|
2002-02-19 15:29:00 +01:00
|
|
|
program interpreter (on ARM GNU/Linux this is usually
|
|
|
|
ld-linux.so.2, but it does not have to be). On the first
|
|
|
|
invocation, the function is located and the GOT entry is replaced
|
|
|
|
with the real function address. Subsequent calls go through steps
|
|
|
|
1, 2 and 3 and end up calling the real code.
|
2000-04-10 23:02:33 +02:00
|
|
|
|
|
|
|
1) In the code:
|
|
|
|
|
|
|
|
b function_call
|
|
|
|
bl function_call
|
|
|
|
|
|
|
|
This is typical ARM code using the 26 bit relative branch or branch
|
|
|
|
and link instructions. The target of the instruction
|
|
|
|
(function_call is usually the address of the function to be called.
|
|
|
|
In position independent code, the target of the instruction is
|
|
|
|
actually an entry in the PLT when calling functions in a shared
|
|
|
|
library. Note that this call is identical to a normal function
|
|
|
|
call, only the target differs.
|
|
|
|
|
|
|
|
2) In the PLT:
|
|
|
|
|
|
|
|
The PLT is a synthetic area, created by the linker. It exists in
|
|
|
|
both executables and libraries. It is an array of stubs, one per
|
|
|
|
imported function call. It looks like this:
|
|
|
|
|
|
|
|
PLT[0]:
|
|
|
|
str lr, [sp, #-4]! @push the return address (lr)
|
|
|
|
ldr lr, [pc, #16] @load from 6 words ahead
|
|
|
|
add lr, pc, lr @form an address for GOT[0]
|
|
|
|
ldr pc, [lr, #8]! @jump to the contents of that addr
|
|
|
|
|
|
|
|
The return address (lr) is pushed on the stack and used for
|
|
|
|
calculations. The load on the second line loads the lr with
|
|
|
|
&GOT[3] - . - 20. The addition on the third leaves:
|
|
|
|
|
|
|
|
lr = (&GOT[3] - . - 20) + (. + 8)
|
|
|
|
lr = (&GOT[3] - 12)
|
|
|
|
lr = &GOT[0]
|
|
|
|
|
|
|
|
On the fourth line, the pc and lr are both updated, so that:
|
|
|
|
|
|
|
|
pc = GOT[2]
|
|
|
|
lr = &GOT[0] + 8
|
|
|
|
= &GOT[2]
|
|
|
|
|
|
|
|
NOTE: PLT[0] borrows an offset .word from PLT[1]. This is a little
|
|
|
|
"tight", but allows us to keep all the PLT entries the same size.
|
|
|
|
|
|
|
|
PLT[n+1]:
|
|
|
|
ldr ip, [pc, #4] @load offset from gotoff
|
|
|
|
add ip, pc, ip @add the offset to the pc
|
|
|
|
ldr pc, [ip] @jump to that address
|
|
|
|
gotoff: .word GOT[n+3] - .
|
|
|
|
|
|
|
|
The load on the first line, gets an offset from the fourth word of
|
|
|
|
the PLT entry. The add on the second line makes ip = &GOT[n+3],
|
|
|
|
which contains either a pointer to PLT[0] (the fixup trampoline) or
|
|
|
|
a pointer to the actual code.
|
|
|
|
|
|
|
|
3) In the GOT:
|
|
|
|
|
|
|
|
The GOT contains helper pointers for both code (PLT) fixups and
|
|
|
|
data fixups. The first 3 entries of the GOT are special. The next
|
|
|
|
M entries (where M is the number of entries in the PLT) belong to
|
|
|
|
the PLT fixups. The next D (all remaining) entries belong to
|
|
|
|
various data fixups. The actual size of the GOT is 3 + M + D.
|
|
|
|
|
|
|
|
The GOT is also a synthetic area, created by the linker. It exists
|
|
|
|
in both executables and libraries. When the GOT is first
|
|
|
|
initialized , all the GOT entries relating to PLT fixups are
|
|
|
|
pointing to code back at PLT[0].
|
|
|
|
|
|
|
|
The special entries in the GOT are:
|
|
|
|
|
|
|
|
GOT[0] = linked list pointer used by the dynamic loader
|
|
|
|
GOT[1] = pointer to the reloc table for this module
|
|
|
|
GOT[2] = pointer to the fixup/resolver code
|
|
|
|
|
|
|
|
The first invocation of function call comes through and uses the
|
|
|
|
fixup/resolver code. On the entry to the fixup/resolver code:
|
|
|
|
|
|
|
|
ip = &GOT[n+3]
|
|
|
|
lr = &GOT[2]
|
|
|
|
stack[0] = return address (lr) of the function call
|
|
|
|
[r0, r1, r2, r3] are still the arguments to the function call
|
|
|
|
|
|
|
|
This is enough information for the fixup/resolver code to work
|
|
|
|
with. Before the fixup/resolver code returns, it actually calls
|
|
|
|
the requested function and repairs &GOT[n+3]. */
|
|
|
|
|
2000-05-25 20:24:33 +02:00
|
|
|
/* Find the minimal symbol named NAME, and return both the minsym
|
|
|
|
struct and its objfile. This probably ought to be in minsym.c, but
|
|
|
|
everything there is trying to deal with things like C++ and
|
|
|
|
SOFUN_ADDRESS_MAYBE_TURQUOISE, ... Since this is so simple, it may
|
|
|
|
be considered too special-purpose for general consumption. */
|
|
|
|
|
|
|
|
static struct minimal_symbol *
|
|
|
|
find_minsym_and_objfile (char *name, struct objfile **objfile_p)
|
|
|
|
{
|
|
|
|
struct objfile *objfile;
|
|
|
|
|
|
|
|
ALL_OBJFILES (objfile)
|
|
|
|
{
|
|
|
|
struct minimal_symbol *msym;
|
|
|
|
|
|
|
|
ALL_OBJFILE_MSYMBOLS (objfile, msym)
|
|
|
|
{
|
2003-02-25 David Carlton <carlton@math.stanford.edu>
* symtab.h (SYMBOL_NATURAL_NAME): New macro.
(SYMBOL_LINKAGE_NAME): Ditto.
(SYMBOL_PRINT_NAME): Use SYMBOL_NATURAL_NAME and
SYMBOL_LINKAGE_NAME.
(struct general_symbol_info): Expand comment.
(DEPRECATED_SYMBOL_NAME): Rename from SYMBOL_NAME.
(SYMBOL_MATCHES_NAME): Use DEPRECATED_SYMBOL_NAME.
(SYMBOL_MATCHES_REGEXP): Ditto.
* symtab.c (symbol_natural_name): New function.
* objfiles.h: Replace all uses of SYMBOL_NAME by
DEPRECATED_SYMBOL_NAME.
* xcoffread.c, valops.c, typeprint.c, tracepoint.c: Ditto.
* symtab.c, symmisc.c, symfile.c, stack.c, stabsread.c: Ditto.
* somsolib.c, sol-thread.c, rs6000-tdep.c, p-valprint.c: Ditto.
* printcmd.c, objfiles.c, objc-lang.c, mipsread.c: Ditto.
* minsyms.c, mdebugread.c, linespec.c, jv-lang.c: Ditto.
* i386-tdep.c, i386-linux-tdep.c, hpread.c, hppa-tdep.c: Ditto.
* gnu-v2-abi.c, f-valprint.c, findvar.c, expprint.c: Ditto.
* dwarfread.c, dwarf2read.c, dbxread.c, c-valprint.c: Ditto.
* cp-valprint.c, coffread.c, buildsym.c, breakpoint.c: Ditto.
* blockframe.c, ax-gdb.c, arm-linux-tdep.c, ada-lang.c: Ditto.
* ada-exp.y: Ditto.
* ada-exp.y: Update copyright.
* sol-thread.c, mipsread.c, jv-lang.c, f-valprint.c: Ditto.
* cp-valprint.c: Ditto.
2003-02-25 David Carlton <carlton@math.stanford.edu>
* generic/gdbtk.h: Replace all instances of SYMBOL_NAME by
DEPRECATED_SYMBOL_NAME.
* generic/gdbtk-stack.c, generic/gdbtk-cmds.c: Ditto.
* generic/gdbtk-stack.c, generic/gdbtk-cmds.c: Update copyright.
2003-02-25 David Carlton <carlton@math.stanford.edu>
* mi-cmd-stack.c: Replace all instances of SYMBOL_NAME with
DEPRECATED_SYMBOL_NAME. Update copyright.
2003-02-25 22:36:23 +01:00
|
|
|
if (DEPRECATED_SYMBOL_NAME (msym)
|
|
|
|
&& strcmp (DEPRECATED_SYMBOL_NAME (msym), name) == 0)
|
2000-05-25 20:24:33 +02:00
|
|
|
{
|
|
|
|
*objfile_p = objfile;
|
|
|
|
return msym;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
static CORE_ADDR
|
|
|
|
skip_hurd_resolver (CORE_ADDR pc)
|
|
|
|
{
|
|
|
|
/* The HURD dynamic linker is part of the GNU C library, so many
|
|
|
|
GNU/Linux distributions use it. (All ELF versions, as far as I
|
|
|
|
know.) An unresolved PLT entry points to "_dl_runtime_resolve",
|
|
|
|
which calls "fixup" to patch the PLT, and then passes control to
|
|
|
|
the function.
|
|
|
|
|
|
|
|
We look for the symbol `_dl_runtime_resolve', and find `fixup' in
|
|
|
|
the same objfile. If we are at the entry point of `fixup', then
|
|
|
|
we set a breakpoint at the return address (at the top of the
|
|
|
|
stack), and continue.
|
|
|
|
|
|
|
|
It's kind of gross to do all these checks every time we're
|
|
|
|
called, since they don't change once the executable has gotten
|
|
|
|
started. But this is only a temporary hack --- upcoming versions
|
2002-02-19 15:29:00 +01:00
|
|
|
of GNU/Linux will provide a portable, efficient interface for
|
2000-05-25 20:24:33 +02:00
|
|
|
debugging programs that use shared libraries. */
|
|
|
|
|
|
|
|
struct objfile *objfile;
|
|
|
|
struct minimal_symbol *resolver
|
|
|
|
= find_minsym_and_objfile ("_dl_runtime_resolve", &objfile);
|
|
|
|
|
|
|
|
if (resolver)
|
|
|
|
{
|
|
|
|
struct minimal_symbol *fixup
|
2001-12-10 23:04:10 +01:00
|
|
|
= lookup_minimal_symbol ("fixup", NULL, objfile);
|
2000-05-25 20:24:33 +02:00
|
|
|
|
|
|
|
if (fixup && SYMBOL_VALUE_ADDRESS (fixup) == pc)
|
|
|
|
return (SAVED_PC_AFTER_CALL (get_current_frame ()));
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* See the comments for SKIP_SOLIB_RESOLVER at the top of infrun.c.
|
|
|
|
This function:
|
|
|
|
1) decides whether a PLT has sent us into the linker to resolve
|
|
|
|
a function reference, and
|
|
|
|
2) if so, tells us where to set a temporary breakpoint that will
|
|
|
|
trigger when the dynamic linker is done. */
|
|
|
|
|
2000-04-10 23:02:33 +02:00
|
|
|
CORE_ADDR
|
2000-05-25 20:24:33 +02:00
|
|
|
arm_linux_skip_solib_resolver (CORE_ADDR pc)
|
2000-04-10 23:02:33 +02:00
|
|
|
{
|
2000-05-25 20:24:33 +02:00
|
|
|
CORE_ADDR result;
|
|
|
|
|
|
|
|
/* Plug in functions for other kinds of resolvers here. */
|
|
|
|
result = skip_hurd_resolver (pc);
|
2000-09-06 20:43:49 +02:00
|
|
|
|
2000-05-25 20:24:33 +02:00
|
|
|
if (result)
|
|
|
|
return result;
|
|
|
|
|
2000-04-10 23:02:33 +02:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2000-09-06 02:39:11 +02:00
|
|
|
/* The constants below were determined by examining the following files
|
|
|
|
in the linux kernel sources:
|
|
|
|
|
|
|
|
arch/arm/kernel/signal.c
|
|
|
|
- see SWI_SYS_SIGRETURN and SWI_SYS_RT_SIGRETURN
|
|
|
|
include/asm-arm/unistd.h
|
|
|
|
- see __NR_sigreturn, __NR_rt_sigreturn, and __NR_SYSCALL_BASE */
|
|
|
|
|
|
|
|
#define ARM_LINUX_SIGRETURN_INSTR 0xef900077
|
|
|
|
#define ARM_LINUX_RT_SIGRETURN_INSTR 0xef9000ad
|
|
|
|
|
|
|
|
/* arm_linux_in_sigtramp determines if PC points at one of the
|
|
|
|
instructions which cause control to return to the Linux kernel upon
|
|
|
|
return from a signal handler. FUNC_NAME is unused. */
|
|
|
|
|
|
|
|
int
|
|
|
|
arm_linux_in_sigtramp (CORE_ADDR pc, char *func_name)
|
|
|
|
{
|
|
|
|
unsigned long inst;
|
|
|
|
|
|
|
|
inst = read_memory_integer (pc, 4);
|
|
|
|
|
|
|
|
return (inst == ARM_LINUX_SIGRETURN_INSTR
|
|
|
|
|| inst == ARM_LINUX_RT_SIGRETURN_INSTR);
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
/* arm_linux_sigcontext_register_address returns the address in the
|
|
|
|
sigcontext of register REGNO given a stack pointer value SP and
|
|
|
|
program counter value PC. The value 0 is returned if PC is not
|
|
|
|
pointing at one of the signal return instructions or if REGNO is
|
|
|
|
not saved in the sigcontext struct. */
|
|
|
|
|
|
|
|
CORE_ADDR
|
|
|
|
arm_linux_sigcontext_register_address (CORE_ADDR sp, CORE_ADDR pc, int regno)
|
|
|
|
{
|
|
|
|
unsigned long inst;
|
|
|
|
CORE_ADDR reg_addr = 0;
|
|
|
|
|
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|
inst = read_memory_integer (pc, 4);
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|
2002-02-19 15:29:00 +01:00
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|
if (inst == ARM_LINUX_SIGRETURN_INSTR
|
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|
|| inst == ARM_LINUX_RT_SIGRETURN_INSTR)
|
2000-09-06 02:39:11 +02:00
|
|
|
{
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|
CORE_ADDR sigcontext_addr;
|
|
|
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|
/* The sigcontext structure is at different places for the two
|
|
|
|
signal return instructions. For ARM_LINUX_SIGRETURN_INSTR,
|
|
|
|
it starts at the SP value. For ARM_LINUX_RT_SIGRETURN_INSTR,
|
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|
it is at SP+8. For the latter instruction, it may also be
|
|
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|
the case that the address of this structure may be determined
|
|
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|
by reading the 4 bytes at SP, but I'm not convinced this is
|
|
|
|
reliable.
|
|
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|
In any event, these magic constants (0 and 8) may be
|
|
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|
determined by examining struct sigframe and struct
|
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|
rt_sigframe in arch/arm/kernel/signal.c in the Linux kernel
|
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sources. */
|
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|
if (inst == ARM_LINUX_RT_SIGRETURN_INSTR)
|
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|
sigcontext_addr = sp + 8;
|
|
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|
else /* inst == ARM_LINUX_SIGRETURN_INSTR */
|
|
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|
sigcontext_addr = sp + 0;
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|
/* The layout of the sigcontext structure for ARM GNU/Linux is
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|
in include/asm-arm/sigcontext.h in the Linux kernel sources.
|
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|
There are three 4-byte fields which precede the saved r0
|
|
|
|
field. (This accounts for the 12 in the code below.) The
|
|
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|
sixteen registers (4 bytes per field) follow in order. The
|
|
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|
PSR value follows the sixteen registers which accounts for
|
|
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|
the constant 19 below. */
|
|
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|
* arm-tdep.h: New file.
* arm-tdep.c: Include arm-tdep.h.
(arm_addr_bits_remove, arm_smash_text_address, arm_saved_pc_after_call)
(arm_skip_prologue, arm_call_dummy_words, arm_fix_call_dummy)
(arm_print_float_info, arm_register_type, convert_to_extended)
(arm_elf_make_msymbols_special, arm_coff_make_msymbol_special)
(arm_extract_return_value, arm_register_name): Make static.
(arm_software_single_step): Similarly. Fix types in declaration.
(arm_register_byte, arm_register_raw_size, arm_register_virtual_size)
(arm_store_return_value, arm_store_struct_return): New functions.
(arm_gdbarch_init): Register the above functions. Also register
call_dummy_start_offset, sizeof_call_dummy_words,
function_start_offset, inner_than, decr_pc_after_break, fp_regnum,
sp_regnum, pc_regnum, register_bytes, num_regs, max_register_raw_size,
max_register_virtual_size, register_size. Set up
prologue_cache.saved_regs here, rather than ...
(_initialize_arm_tdep): ... here.
* config/arm/tm-arm.h (struct type, struct value): Delete forward
declarations.
(arm_addr_bits_remove, arm_smash_text_address, arm_saved_pc_after_call)
(arm_skip_prologue, arm_call_dummy_words, arm_fix_call_dummy)
(arm_print_float_info, arm_register_type, convert_to_extended)
(arm_elf_make_msymbols_special, arm_coff_make_msymbol_special)
(arm_extract_return_value, arm_register_name): Delete declarations.
(SMASH_TEXT_ADDRESS, ADDR_BITS_REMOVE, FUNCTION_START_OFFSET)
(SKIP_PROLOGUE, SAVED_PC_AFTER_CALL, INNER_THAN, BREAKPOINT_FROM_PC)
(DECR_PC_AFTER_BREAK, PRINT_FLOAT_INFO, REGISTER_SIZE, NUM_REGS)
(REGISTER_NAME, REGISTER_BYTES, REGISTER_BYTE, REGISTER_RAW_SIZE)
(REGISTER_VIRTUAL_SIZE, MAX_REGISTER_RAW_SIZE)
(MAX_REGISTER_VIRTUAL_SIZE, REGISTER_VIRTUAL_TYPE, STORE_STRUCT_RETURN)
(EXTRACT_RETURN_VALUE, STORE_RETURN_VALUE, CALL_DUMMY_WORDS)
(SIZEOF_CALL_DUMMY_WORDS, CALL_DUMMY_START_OFFSET, FIX_CALL_DUMMY)
(SOFTWARE_SINGLE_STEP_P, SOFTWARE_SINGLE_STEP)
(ELF_MAKE_MSYMBOL_SPECIAL, COFF_MAKE_MSYMBOL_SPECIAL) Delete.
(arm_pc_is_thumb, arm_pc_is_thumb_dummy, thumb_get_next_pc)
(arm_get_next_pc): No-longer static -- these are needed by the RDI
interface.
* arm-linux-nat.c arm-linux-tdep.c armnbsd-nat.c: Include arm-tdep.h.
* remote-rdi.c remote-rdp.c: Likewise.
* Makefile.in (arm-linux-nat.o, arm-linux-tdep.o arm-tdep.o)
(armnbsd-nat.o, remote-rdi.o, remote_rdp.o): Update dependencies.
* config/arm/tm-nbsd.h (SOFTWARE_SINGLE_STEP_P): Delete bogus
definition.
* arm-tdep.h (ARM_A1_REGNUM, ARM_A4_REGNUM, ARM_AP_REGNUM)
(ARM_SP_REGNUM, ARM_LR_REGNUM, ARM_PC_REGNUM, ARM_F0_REGNUM)
(ARM_F3_REGNUM, ARM_F7_REGNUM, ARM_FPS_REGNUM, ARM_PS_REGNUM): Renamed
from non-ARM_ prefixed definitions.
* arm-tdep.c armnbsd-nat.c arm-linux-nat.c arm-linux-tdep.c: Update
all uses of above.
* remote-rdi.c remote-rdp.c: Likewise.
* arm-linux-nat.c (ARM_CPSR_REGNUM): Renamed from CPSR_REGNUM.
2002-02-11 19:34:12 +01:00
|
|
|
if (0 <= regno && regno <= ARM_PC_REGNUM)
|
2000-09-06 02:39:11 +02:00
|
|
|
reg_addr = sigcontext_addr + 12 + (4 * regno);
|
* arm-tdep.h: New file.
* arm-tdep.c: Include arm-tdep.h.
(arm_addr_bits_remove, arm_smash_text_address, arm_saved_pc_after_call)
(arm_skip_prologue, arm_call_dummy_words, arm_fix_call_dummy)
(arm_print_float_info, arm_register_type, convert_to_extended)
(arm_elf_make_msymbols_special, arm_coff_make_msymbol_special)
(arm_extract_return_value, arm_register_name): Make static.
(arm_software_single_step): Similarly. Fix types in declaration.
(arm_register_byte, arm_register_raw_size, arm_register_virtual_size)
(arm_store_return_value, arm_store_struct_return): New functions.
(arm_gdbarch_init): Register the above functions. Also register
call_dummy_start_offset, sizeof_call_dummy_words,
function_start_offset, inner_than, decr_pc_after_break, fp_regnum,
sp_regnum, pc_regnum, register_bytes, num_regs, max_register_raw_size,
max_register_virtual_size, register_size. Set up
prologue_cache.saved_regs here, rather than ...
(_initialize_arm_tdep): ... here.
* config/arm/tm-arm.h (struct type, struct value): Delete forward
declarations.
(arm_addr_bits_remove, arm_smash_text_address, arm_saved_pc_after_call)
(arm_skip_prologue, arm_call_dummy_words, arm_fix_call_dummy)
(arm_print_float_info, arm_register_type, convert_to_extended)
(arm_elf_make_msymbols_special, arm_coff_make_msymbol_special)
(arm_extract_return_value, arm_register_name): Delete declarations.
(SMASH_TEXT_ADDRESS, ADDR_BITS_REMOVE, FUNCTION_START_OFFSET)
(SKIP_PROLOGUE, SAVED_PC_AFTER_CALL, INNER_THAN, BREAKPOINT_FROM_PC)
(DECR_PC_AFTER_BREAK, PRINT_FLOAT_INFO, REGISTER_SIZE, NUM_REGS)
(REGISTER_NAME, REGISTER_BYTES, REGISTER_BYTE, REGISTER_RAW_SIZE)
(REGISTER_VIRTUAL_SIZE, MAX_REGISTER_RAW_SIZE)
(MAX_REGISTER_VIRTUAL_SIZE, REGISTER_VIRTUAL_TYPE, STORE_STRUCT_RETURN)
(EXTRACT_RETURN_VALUE, STORE_RETURN_VALUE, CALL_DUMMY_WORDS)
(SIZEOF_CALL_DUMMY_WORDS, CALL_DUMMY_START_OFFSET, FIX_CALL_DUMMY)
(SOFTWARE_SINGLE_STEP_P, SOFTWARE_SINGLE_STEP)
(ELF_MAKE_MSYMBOL_SPECIAL, COFF_MAKE_MSYMBOL_SPECIAL) Delete.
(arm_pc_is_thumb, arm_pc_is_thumb_dummy, thumb_get_next_pc)
(arm_get_next_pc): No-longer static -- these are needed by the RDI
interface.
* arm-linux-nat.c arm-linux-tdep.c armnbsd-nat.c: Include arm-tdep.h.
* remote-rdi.c remote-rdp.c: Likewise.
* Makefile.in (arm-linux-nat.o, arm-linux-tdep.o arm-tdep.o)
(armnbsd-nat.o, remote-rdi.o, remote_rdp.o): Update dependencies.
* config/arm/tm-nbsd.h (SOFTWARE_SINGLE_STEP_P): Delete bogus
definition.
* arm-tdep.h (ARM_A1_REGNUM, ARM_A4_REGNUM, ARM_AP_REGNUM)
(ARM_SP_REGNUM, ARM_LR_REGNUM, ARM_PC_REGNUM, ARM_F0_REGNUM)
(ARM_F3_REGNUM, ARM_F7_REGNUM, ARM_FPS_REGNUM, ARM_PS_REGNUM): Renamed
from non-ARM_ prefixed definitions.
* arm-tdep.c armnbsd-nat.c arm-linux-nat.c arm-linux-tdep.c: Update
all uses of above.
* remote-rdi.c remote-rdp.c: Likewise.
* arm-linux-nat.c (ARM_CPSR_REGNUM): Renamed from CPSR_REGNUM.
2002-02-11 19:34:12 +01:00
|
|
|
else if (regno == ARM_PS_REGNUM)
|
2000-09-06 02:39:11 +02:00
|
|
|
reg_addr = sigcontext_addr + 19 * 4;
|
|
|
|
}
|
|
|
|
|
|
|
|
return reg_addr;
|
|
|
|
}
|
|
|
|
|
2002-02-15 14:35:27 +01:00
|
|
|
static void
|
|
|
|
arm_linux_init_abi (struct gdbarch_info info,
|
|
|
|
struct gdbarch *gdbarch)
|
|
|
|
{
|
|
|
|
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
|
|
|
|
|
|
|
|
tdep->lowest_pc = 0x8000;
|
2002-02-15 17:12:24 +01:00
|
|
|
tdep->arm_breakpoint = arm_linux_arm_le_breakpoint;
|
|
|
|
tdep->arm_breakpoint_size = sizeof (arm_linux_arm_le_breakpoint);
|
2002-02-18 14:35:31 +01:00
|
|
|
|
2002-05-15 14:29:41 +02:00
|
|
|
tdep->jb_pc = ARM_LINUX_JB_PC;
|
|
|
|
tdep->jb_elt_size = ARM_LINUX_JB_ELEMENT_SIZE;
|
2002-02-23 18:07:57 +01:00
|
|
|
|
|
|
|
set_gdbarch_call_dummy_words (gdbarch, arm_linux_call_dummy_words);
|
|
|
|
set_gdbarch_sizeof_call_dummy_words (gdbarch,
|
|
|
|
sizeof (arm_linux_call_dummy_words));
|
|
|
|
|
|
|
|
/* The following two overrides shouldn't be needed. */
|
2002-06-15 00:55:51 +02:00
|
|
|
set_gdbarch_deprecated_extract_return_value (gdbarch, arm_linux_extract_return_value);
|
2002-02-23 18:07:57 +01:00
|
|
|
set_gdbarch_push_arguments (gdbarch, arm_linux_push_arguments);
|
2002-02-23 23:17:12 +01:00
|
|
|
|
|
|
|
/* Shared library handling. */
|
|
|
|
set_gdbarch_in_solib_call_trampoline (gdbarch, in_plt_section);
|
|
|
|
set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
|
2002-02-15 14:35:27 +01:00
|
|
|
}
|
|
|
|
|
2000-04-05 17:38:05 +02:00
|
|
|
void
|
|
|
|
_initialize_arm_linux_tdep (void)
|
|
|
|
{
|
2002-12-21 20:58:07 +01:00
|
|
|
gdbarch_register_osabi (bfd_arch_arm, 0, GDB_OSABI_LINUX,
|
|
|
|
arm_linux_init_abi);
|
2000-04-05 17:38:05 +02:00
|
|
|
}
|