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- /* none on ARM target support.
- Copyright (C) 2020-2022 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 3 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, see <http://www.gnu.org/licenses/>. */
- #include "defs.h"
- #include "arm-tdep.h"
- #include "arch-utils.h"
- #include "regcache.h"
- #include "elf-bfd.h"
- #include "regset.h"
- #include "user-regs.h"
- #ifdef HAVE_ELF
- #include "elf-none-tdep.h"
- #endif
- /* Core file and register set support. */
- #define ARM_NONE_SIZEOF_GREGSET (18 * ARM_INT_REGISTER_SIZE)
- /* Support VFP register format. */
- #define ARM_NONE_SIZEOF_VFP (32 * 8 + 4)
- /* The index to access CPSR in user_regs as defined in GLIBC. */
- #define ARM_NONE_CPSR_GREGNUM 16
- /* Supply register REGNUM from buffer GREGS_BUF (length LEN bytes) into
- REGCACHE. If REGNUM is -1 then supply all registers. The set of
- registers that this function will supply is limited to the general
- purpose registers.
- The layout of the registers here is based on the ARM GNU/Linux
- layout. */
- static void
- arm_none_supply_gregset (const struct regset *regset,
- struct regcache *regcache,
- int regnum, const void *gregs_buf, size_t len)
- {
- struct gdbarch *gdbarch = regcache->arch ();
- enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
- const gdb_byte *gregs = (const gdb_byte *) gregs_buf;
- for (int regno = ARM_A1_REGNUM; regno < ARM_PC_REGNUM; regno++)
- if (regnum == -1 || regnum == regno)
- regcache->raw_supply (regno, gregs + ARM_INT_REGISTER_SIZE * regno);
- if (regnum == ARM_PS_REGNUM || regnum == -1)
- {
- if (arm_apcs_32)
- regcache->raw_supply (ARM_PS_REGNUM,
- gregs + ARM_INT_REGISTER_SIZE
- * ARM_NONE_CPSR_GREGNUM);
- else
- regcache->raw_supply (ARM_PS_REGNUM,
- gregs + ARM_INT_REGISTER_SIZE * ARM_PC_REGNUM);
- }
- if (regnum == ARM_PC_REGNUM || regnum == -1)
- {
- gdb_byte pc_buf[ARM_INT_REGISTER_SIZE];
- CORE_ADDR reg_pc
- = extract_unsigned_integer (gregs + ARM_INT_REGISTER_SIZE
- * ARM_PC_REGNUM,
- ARM_INT_REGISTER_SIZE, byte_order);
- reg_pc = gdbarch_addr_bits_remove (gdbarch, reg_pc);
- store_unsigned_integer (pc_buf, ARM_INT_REGISTER_SIZE, byte_order,
- reg_pc);
- regcache->raw_supply (ARM_PC_REGNUM, pc_buf);
- }
- }
- /* Collect register REGNUM from REGCACHE and place it into buffer GREGS_BUF
- (length LEN bytes). If REGNUM is -1 then collect all registers. The
- set of registers that this function will collect is limited to the
- general purpose registers.
- The layout of the registers here is based on the ARM GNU/Linux
- layout. */
- static void
- arm_none_collect_gregset (const struct regset *regset,
- const struct regcache *regcache,
- int regnum, void *gregs_buf, size_t len)
- {
- gdb_byte *gregs = (gdb_byte *) gregs_buf;
- for (int regno = ARM_A1_REGNUM; regno < ARM_PC_REGNUM; regno++)
- if (regnum == -1 || regnum == regno)
- regcache->raw_collect (regno,
- gregs + ARM_INT_REGISTER_SIZE * regno);
- if (regnum == ARM_PS_REGNUM || regnum == -1)
- {
- if (arm_apcs_32)
- regcache->raw_collect (ARM_PS_REGNUM,
- gregs + ARM_INT_REGISTER_SIZE
- * ARM_NONE_CPSR_GREGNUM);
- else
- regcache->raw_collect (ARM_PS_REGNUM,
- gregs + ARM_INT_REGISTER_SIZE * ARM_PC_REGNUM);
- }
- if (regnum == ARM_PC_REGNUM || regnum == -1)
- regcache->raw_collect (ARM_PC_REGNUM,
- gregs + ARM_INT_REGISTER_SIZE * ARM_PC_REGNUM);
- }
- /* Supply VFP registers from REGS_BUF into REGCACHE. */
- static void
- arm_none_supply_vfp (const struct regset *regset,
- struct regcache *regcache,
- int regnum, const void *regs_buf, size_t len)
- {
- const gdb_byte *regs = (const gdb_byte *) regs_buf;
- if (regnum == ARM_FPSCR_REGNUM || regnum == -1)
- regcache->raw_supply (ARM_FPSCR_REGNUM, regs + 32 * 8);
- for (int regno = ARM_D0_REGNUM; regno <= ARM_D31_REGNUM; regno++)
- if (regnum == -1 || regnum == regno)
- regcache->raw_supply (regno, regs + (regno - ARM_D0_REGNUM) * 8);
- }
- /* Collect VFP registers from REGCACHE into REGS_BUF. */
- static void
- arm_none_collect_vfp (const struct regset *regset,
- const struct regcache *regcache,
- int regnum, void *regs_buf, size_t len)
- {
- gdb_byte *regs = (gdb_byte *) regs_buf;
- if (regnum == ARM_FPSCR_REGNUM || regnum == -1)
- regcache->raw_collect (ARM_FPSCR_REGNUM, regs + 32 * 8);
- for (int regno = ARM_D0_REGNUM; regno <= ARM_D31_REGNUM; regno++)
- if (regnum == -1 || regnum == regno)
- regcache->raw_collect (regno, regs + (regno - ARM_D0_REGNUM) * 8);
- }
- /* The general purpose register set. */
- static const struct regset arm_none_gregset =
- {
- nullptr, arm_none_supply_gregset, arm_none_collect_gregset
- };
- /* The VFP register set. */
- static const struct regset arm_none_vfpregset =
- {
- nullptr, arm_none_supply_vfp, arm_none_collect_vfp
- };
- /* Iterate over core file register note sections. */
- static void
- arm_none_iterate_over_regset_sections (struct gdbarch *gdbarch,
- iterate_over_regset_sections_cb *cb,
- void *cb_data,
- const struct regcache *regcache)
- {
- arm_gdbarch_tdep *tdep = (arm_gdbarch_tdep *) gdbarch_tdep (gdbarch);
- cb (".reg", ARM_NONE_SIZEOF_GREGSET, ARM_NONE_SIZEOF_GREGSET,
- &arm_none_gregset, nullptr, cb_data);
- if (tdep->vfp_register_count > 0)
- cb (".reg-arm-vfp", ARM_NONE_SIZEOF_VFP, ARM_NONE_SIZEOF_VFP,
- &arm_none_vfpregset, "VFP floating-point", cb_data);
- }
- /* Initialize ARM bare-metal ABI info. */
- static void
- arm_none_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
- {
- #ifdef HAVE_ELF
- elf_none_init_abi (gdbarch);
- #endif
- /* Iterate over registers for reading and writing bare metal ARM core
- files. */
- set_gdbarch_iterate_over_regset_sections
- (gdbarch, arm_none_iterate_over_regset_sections);
- }
- /* Initialize ARM bare-metal target support. */
- void _initialize_arm_none_tdep ();
- void
- _initialize_arm_none_tdep ()
- {
- gdbarch_register_osabi (bfd_arch_arm, 0, GDB_OSABI_NONE,
- arm_none_init_abi);
- }
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