2006-07-16 23:29:09 +08:00
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/* Target-dependent code for OpenBSD/arm.
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2019-01-01 14:01:51 +08:00
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Copyright (C) 2006-2019 Free Software Foundation, Inc.
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2006-07-16 23:29:09 +08:00
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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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2007-08-24 02:08:50 +08:00
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the Free Software Foundation; either version 3 of the License, or
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2006-07-16 23:29:09 +08:00
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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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2007-08-24 02:08:50 +08:00
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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2006-07-16 23:29:09 +08:00
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#include "defs.h"
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2019-04-03 10:04:24 +08:00
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#include "osabi.h"
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#include "trad-frame.h"
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#include "tramp-frame.h"
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2006-07-16 23:29:09 +08:00
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2019-04-07 03:38:10 +08:00
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#include "obsd-tdep.h"
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#include "arm-tdep.h"
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#include "solib-svr4.h"
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2006-07-19 05:10:28 +08:00
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/* Signal trampolines. */
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static void
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armobsd_sigframe_init (const struct tramp_frame *self,
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2008-05-01 05:23:45 +08:00
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struct frame_info *this_frame,
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2006-07-19 05:10:28 +08:00
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struct trad_frame_cache *cache,
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CORE_ADDR func)
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{
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CORE_ADDR sp, sigcontext_addr, addr;
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int regnum;
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/* We find the appropriate instance of `struct sigcontext' at a
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fixed offset in the signal frame. */
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2008-05-01 05:23:45 +08:00
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sp = get_frame_register_signed (this_frame, ARM_SP_REGNUM);
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2006-07-19 05:10:28 +08:00
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sigcontext_addr = sp + 16;
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/* PC. */
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trad_frame_set_reg_addr (cache, ARM_PC_REGNUM, sigcontext_addr + 76);
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/* GPRs. */
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for (regnum = ARM_A1_REGNUM, addr = sigcontext_addr + 12;
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regnum <= ARM_LR_REGNUM; regnum++, addr += 4)
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trad_frame_set_reg_addr (cache, regnum, addr);
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trad_frame_set_id (cache, frame_id_build (sp, func));
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}
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static const struct tramp_frame armobsd_sigframe =
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{
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SIGTRAMP_FRAME,
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4,
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{
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2018-08-08 03:04:05 +08:00
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{ 0xe28d0010, ULONGEST_MAX }, /* add r0, sp, #16 */
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{ 0xef000067, ULONGEST_MAX }, /* swi SYS_sigreturn */
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{ 0xef000001, ULONGEST_MAX }, /* swi SYS_exit */
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{ 0xeafffffc, ULONGEST_MAX }, /* b . - 8 */
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{ TRAMP_SENTINEL_INSN, ULONGEST_MAX }
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2006-07-19 05:10:28 +08:00
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},
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armobsd_sigframe_init
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};
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2007-05-16 23:31:12 +08:00
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/* Override default thumb breakpoints. */
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-Wpointer-sign: char -> gdb_byte.
-Wpointer-sign catches all these cases across the codebase that should
be using gdb_byte for raw target bytes. I think these are all
obvious, hence I've collapsed into a single patch.
gdb/
2013-04-19 Pedro Alves <palves@redhat.com>
* aarch64-tdep.c (aarch64_default_breakpoint): Change type to
gdb_byte[].
(aarch64_breakpoint_from_pc): Change return type to gdb_byte *.
* ada-lang.c (ada_value_assign): Use gdb_byte.
* alphanbsd-tdep.c (sigtramp_retcode): Change type to gdb_byte[].
(alphanbsd_sigtramp_offset): Use gdb_byte.
* arm-linux-tdep.c (arm_linux_arm_le_breakpoint)
(arm_linux_arm_be_breakpoint, eabi_linux_arm_le_breakpoint)
(eabi_linux_arm_be_breakpoint, arm_linux_thumb_be_breakpoint)
(arm_linux_thumb_le_breakpoint, arm_linux_thumb2_be_breakpoint)
(arm_linux_thumb2_le_breakpoint): Change type to gdb_byte[].
* arm-tdep.c (arm_stub_unwind_sniffer)
(arm_displaced_init_closure): Use gdb_byte.
(arm_default_arm_le_breakpoint, arm_default_arm_be_breakpoint)
(arm_default_thumb_le_breakpoint)
(arm_default_thumb_be_breakpoint): Change type to gdb_byte[].
* arm-tdep.h (struct gdbarch_tdep) <arm_breakpoint,
thumb_breakpoint, thumb2_breakpoint>: Change type to gdb_byte *.
* arm-wince-tdep.c (arm_wince_le_breakpoint)
(arm_wince_thumb_le_breakpoint): Change type to gdb_byte[].
* armnbsd-tdep.c (arm_nbsd_arm_le_breakpoint)
(arm_nbsd_arm_be_breakpoint, arm_nbsd_thumb_le_breakpoint)
(arm_nbsd_thumb_be_breakpoint): Change type to gdb_byte[].
* armobsd-tdep.c (arm_obsd_thumb_le_breakpoint)
(arm_obsd_thumb_be_breakpoint): Change type to gdb_byte[].
* cris-tdep.c (push_stack_item, cris_push_dummy_call)
(cris_store_return_value, cris_extract_return_value): Use
gdb_byte.
(constraint): Change type of parameter to char * from signed
char*. Use gdb_byte.
* dwarf2loc.c (read_pieced_value, write_pieced_value): Change type
of local buffer to gdb_byte *.
* dwarf2read.c (read_index_from_section): Use gdb_byte.
(create_dwp_hash_table): Change type of locals to gdb_byte *.
(add_address_entry): Change type of local buffer to gdb_byte[].
* frv-tdep.c (frv_adjust_breakpoint_address, find_func_descr)
(frv_push_dummy_call): Use gdb_byte.
* hppa-hpux-tdep.c (hppa_hpux_push_dummy_code)
(hppa_hpux_supply_ss_fpblock, hppa_hpux_supply_ss_wide)
(hppa_hpux_supply_save_state): Use gdb_byte.
* hppa-tdep.c (hppa32_push_dummy_call)
(hppa64_convert_code_addr_to_fptr): Use gdb_byte.
* ia64-tdep.c (extract_bit_field, replace_bit_field)
(slotN_contents, replace_slotN_contents): Change type of parameter
to gdb_byte *.
(fetch_instruction, ia64_pseudo_register_write)
(ia64_register_to_value, ia64_value_to_register)
(ia64_extract_return_value, ia64_store_return_value)
(ia64_push_dummy_call): Use gdb_byte.
* m32c-tdep.c (m32c_return_value): Remove cast.
* m68hc11-tdep.c (m68hc11_pseudo_register_write)
(m68hc11_push_dummy_call, m68hc11_store_return_value): Use
gdb_byte.
* mipsnbsd-tdep.c (mipsnbsd_get_longjmp_target): Use gdb_byte.
* mn10300-tdep.c (mn10300_store_return_value)
(mn10300_breakpoint_from_pc, mn10300_push_dummy_call): Use
gdb_byte.
* moxie-tdep.c (moxie_process_readu): Use gdb_byte.
(moxie_process_record): Remove casts.
* ppc-ravenscar-thread.c (supply_register_at_address)
(ppc_ravenscar_generic_store_registers): Use gdb_byte.
* ravenscar-thread.c (get_running_thread_id): Use gdb_byte.
* remote-m32r-sdi.c (m32r_fetch_register): Use gdb_byte.
* remote-mips.c (mips_xfer_memory): Use gdb_byte.
* remote.c (compare_sections_command): Use gdb_byte.
* score-tdep.c (score7_free_memblock): Change type of parameter to
gdb_byte *.
* sh-tdep.c (sh_justify_value_in_reg): Change return type to
gdb_byte *. Use gdb_byte.
(sh_push_dummy_call_fpu): Use gdb_byte.
(sh_extract_return_value_nofpu, sh_extract_return_value_fpu)
(sh_store_return_value_nofpu, sh_store_return_value_fpu)
(sh_register_convert_to_virtual, sh_register_convert_to_raw):
Change parameter type to 'gdb_byte *'. Use gdb_byte.
(sh_pseudo_register_read, sh_pseudo_register_write): Use gdb_byte.
* sh64-tdep.c (sh64_push_dummy_call): Use gdb_byte.
(sh64_store_return_value, sh64_register_convert_to_virtual):
Change parameter type to 'gdb_byte *'. Use gdb_byte.
(sh64_pseudo_register_write): Use gdb_byte.
* solib-darwin.c (darwin_current_sos): Add casts to 'gdb_byte *'.
* solib-irix.c (fetch_lm_info): Likewise. Use gdb_byte for byte
buffer.
(irix_current_sos): Use gdb_byte.
* solib-som.c (som_current_sos): Use gdb_byte.
* sparc-ravenscar-thread.c (supply_register_at_address)
(sparc_ravenscar_generic_store_registers): Use gdb_byte.
* spu-multiarch.c (spu_xfer_partial): Add cast to 'char *'.
* spu-tdep.c (spu_get_overlay_table): Use gdb_byte.
* tic6x-tdep.c (tic6x_breakpoint_from_pc): Change return type to
'gdb_byte *'.
* tic6x-tdep.h (struct gdbarch_tdep) <breakpoint>: Change type to
'gdb_byte *'.
* tracepoint.c (tfile_fetch_registers): Use gdb_byte.
* xstormy16-tdep.c (xstormy16_extract_return_value)
(xstormy16_store_return_value): Change parameter type to
'gdb_byte *'. Adjust.
(xstormy16_push_dummy_call): Use gdb_byte.
* xtensa-tdep.c (xtensa_scan_prologue, call0_ret)
(call0_analyze_prologue, execute_code): Use gdb_byte.
2013-04-19 23:09:46 +08:00
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static const gdb_byte arm_obsd_thumb_le_breakpoint[] = {0xfe, 0xdf};
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static const gdb_byte arm_obsd_thumb_be_breakpoint[] = {0xdf, 0xfe};
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2007-05-16 23:31:12 +08:00
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2006-07-16 23:29:09 +08:00
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static void
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armobsd_init_abi (struct gdbarch_info info,
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struct gdbarch *gdbarch)
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{
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struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
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if (tdep->fp_model == ARM_FLOAT_AUTO)
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tdep->fp_model = ARM_FLOAT_SOFT_VFP;
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2006-07-19 05:10:28 +08:00
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tramp_frame_prepend_unwinder (gdbarch, &armobsd_sigframe);
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2006-07-16 23:29:09 +08:00
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/* OpenBSD/arm uses SVR4-style shared libraries. */
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set_solib_svr4_fetch_link_map_offsets
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(gdbarch, svr4_ilp32_fetch_link_map_offsets);
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2006-07-18 03:34:57 +08:00
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set_gdbarch_skip_solib_resolver (gdbarch, obsd_skip_solib_resolver);
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2006-07-16 23:29:09 +08:00
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tdep->jb_pc = 24;
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tdep->jb_elt_size = 4;
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2006-08-02 02:27:52 +08:00
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2014-03-29 17:12:57 +08:00
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set_gdbarch_iterate_over_regset_sections
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(gdbarch, armbsd_iterate_over_regset_sections);
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2006-08-03 05:32:37 +08:00
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2006-08-02 02:27:52 +08:00
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/* OpenBSD/arm uses -fpcc-struct-return by default. */
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tdep->struct_return = pcc_struct_return;
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2007-05-16 23:31:12 +08:00
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/* Single stepping. */
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set_gdbarch_software_single_step (gdbarch, arm_software_single_step);
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/* Breakpoints. */
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switch (info.byte_order)
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{
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case BFD_ENDIAN_BIG:
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tdep->thumb_breakpoint = arm_obsd_thumb_be_breakpoint;
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tdep->thumb_breakpoint_size = sizeof (arm_obsd_thumb_be_breakpoint);
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break;
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case BFD_ENDIAN_LITTLE:
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tdep->thumb_breakpoint = arm_obsd_thumb_le_breakpoint;
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tdep->thumb_breakpoint_size = sizeof (arm_obsd_thumb_le_breakpoint);
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break;
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}
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2006-07-16 23:29:09 +08:00
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}
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2009-02-22 09:02:20 +08:00
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2006-07-16 23:29:09 +08:00
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void
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_initialize_armobsd_tdep (void)
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{
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2016-12-10 00:08:49 +08:00
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gdbarch_register_osabi (bfd_arch_arm, 0, GDB_OSABI_OPENBSD,
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2006-07-16 23:29:09 +08:00
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armobsd_init_abi);
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}
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