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- /* Target-dependent code for GNU/Linux on CSKY.
- Copyright (C) 2012-2022 Free Software Foundation, Inc.
- Contributed by C-SKY Microsystems and Mentor Graphics.
- 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 "osabi.h"
- #include "glibc-tdep.h"
- #include "linux-tdep.h"
- #include "gdbarch.h"
- #include "solib-svr4.h"
- #include "regset.h"
- #include "trad-frame.h"
- #include "tramp-frame.h"
- #include "csky-tdep.h"
- /* Functions, definitions, and data structures for C-Sky core file debug. */
- /* General regset pc, r1, r0, psr, r2-r31 for CK810. */
- #define SIZEOF_CSKY_GREGSET 34*4
- /* Float regset fesr fsr fr0-fr31 for CK810. */
- #define SIZEOF_CSKY_FREGSET 34*4
- /* Offset mapping table from core_section to regcache of general
- registers for ck810. */
- static const int csky_gregset_offset[] =
- {
- 72, 1, 0, 89, 2, /* pc, r1, r0, psr, r2. */
- 3, 4, 5, 6, 7, /* r3 ~ r32. */
- 8, 9, 10, 11, 12,
- 13, 14, 15, 16, 17,
- 18, 19, 20, 21, 22,
- 23, 24, 25, 26, 27,
- 28, 29, 30, 31
- };
- /* Offset mapping table from core_section to regcache of float
- registers for ck810. */
- static const int csky_fregset_offset[] =
- {
- 122, 123, 40, 41, 42, /* fcr, fesr, fr0 ~ fr2. */
- 43, 44, 45, 46, 47, /* fr3 ~ fr15. */
- 48, 49, 50, 51, 52,
- 53, 54, 55
- };
- /* Implement the supply_regset hook for GP registers in core files. */
- static void
- csky_supply_gregset (const struct regset *regset,
- struct regcache *regcache, int regnum,
- const void *regs, size_t len)
- {
- int i, gregset_num;
- const gdb_byte *gregs = (const gdb_byte *) regs ;
- gdb_assert (len >= SIZEOF_CSKY_GREGSET);
- gregset_num = ARRAY_SIZE (csky_gregset_offset);
- for (i = 0; i < gregset_num; i++)
- {
- if ((regnum == csky_gregset_offset[i] || regnum == -1)
- && csky_gregset_offset[i] != -1)
- regcache->raw_supply (csky_gregset_offset[i], gregs + 4 * i);
- }
- }
- /* Implement the collect_regset hook for GP registers in core files. */
- static void
- csky_collect_gregset (const struct regset *regset,
- const struct regcache *regcache,
- int regnum, void *gregs_buf, size_t len)
- {
- int regno, gregset_num;
- gdb_byte *gregs = (gdb_byte *) gregs_buf ;
- gdb_assert (len >= SIZEOF_CSKY_GREGSET);
- gregset_num = ARRAY_SIZE (csky_gregset_offset);
- for (regno = 0; regno < gregset_num; regno++)
- {
- if ((regnum == csky_gregset_offset[regno] || regnum == -1)
- && csky_gregset_offset[regno] != -1)
- regcache->raw_collect (regno,
- gregs + 4 + csky_gregset_offset[regno]);
- }
- }
- /* Implement the supply_regset hook for FP registers in core files. */
- static void
- csky_supply_fregset (const struct regset *regset,
- struct regcache *regcache, int regnum,
- const void *regs, size_t len)
- {
- int i;
- int offset = 0;
- struct gdbarch *gdbarch = regcache->arch ();
- const gdb_byte *fregs = (const gdb_byte *) regs;
- int fregset_num = ARRAY_SIZE (csky_fregset_offset);
- gdb_assert (len >= SIZEOF_CSKY_FREGSET);
- for (i = 0; i < fregset_num; i++)
- {
- if ((regnum == csky_fregset_offset[i] || regnum == -1)
- && csky_fregset_offset[i] != -1)
- {
- int num = csky_fregset_offset[i];
- offset += register_size (gdbarch, num);
- regcache->raw_supply (csky_fregset_offset[i], fregs + offset);
- }
- }
- }
- /* Implement the collect_regset hook for FP registers in core files. */
- static void
- csky_collect_fregset (const struct regset *regset,
- const struct regcache *regcache,
- int regnum, void *fregs_buf, size_t len)
- {
- int regno;
- struct gdbarch *gdbarch = regcache->arch ();
- gdb_byte *fregs = (gdb_byte *) fregs_buf ;
- int fregset_num = ARRAY_SIZE (csky_fregset_offset);
- int offset = 0;
- gdb_assert (len >= SIZEOF_CSKY_FREGSET);
- for (regno = 0; regno < fregset_num; regno++)
- {
- if ((regnum == csky_fregset_offset[regno] || regnum == -1)
- && csky_fregset_offset[regno] != -1)
- {
- offset += register_size (gdbarch, csky_fregset_offset[regno]);
- regcache->raw_collect (regno, fregs + offset);
- }
- }
- }
- static const struct regset csky_regset_general =
- {
- NULL,
- csky_supply_gregset,
- csky_collect_gregset
- };
- static const struct regset csky_regset_float =
- {
- NULL,
- csky_supply_fregset,
- csky_collect_fregset
- };
- /* Iterate over core file register note sections. */
- static void
- csky_linux_iterate_over_regset_sections (struct gdbarch *gdbarch,
- iterate_over_regset_sections_cb *cb,
- void *cb_data,
- const struct regcache *regcache)
- {
- cb (".reg", sizeof (csky_gregset_offset), sizeof (csky_gregset_offset),
- &csky_regset_general, NULL, cb_data);
- cb (".reg2", sizeof (csky_fregset_offset), sizeof (csky_fregset_offset),
- &csky_regset_float, NULL, cb_data);
- }
- static void
- csky_linux_rt_sigreturn_init (const struct tramp_frame *self,
- struct frame_info *this_frame,
- struct trad_frame_cache *this_cache,
- CORE_ADDR func)
- {
- int i;
- CORE_ADDR sp = get_frame_register_unsigned (this_frame, 14);
- CORE_ADDR base = sp + CSKY_SIGINFO_OFFSET + CSKY_SIGINFO_SIZE
- + CSKY_UCONTEXT_SIGCONTEXT
- + CSKY_SIGCONTEXT_SC_USP
- + CSKY_SIGCONTEXT_SC_A0;
- /* Set addrs of R0 ~ R13. */
- for (i = 0; i < 14; i++)
- trad_frame_set_reg_addr (this_cache, i, base + i * 4);
- /* Set addrs of SP(R14) and R15. */
- trad_frame_set_reg_addr (this_cache, 14, base - 4);
- trad_frame_set_reg_addr (this_cache, 15, base + 4 * 14);
- /* Set addrs of R16 ~ R31. */
- for (i = 15; i < 31; i++)
- trad_frame_set_reg_addr (this_cache, i, base + i * 4);
- /* Set addrs of PSR and PC. */
- trad_frame_set_reg_addr (this_cache, 89, base + 4 * 33);
- trad_frame_set_reg_addr (this_cache, 72, base + 4 * 34);
- trad_frame_set_id (this_cache, frame_id_build (sp, func));
- }
- static struct tramp_frame
- csky_linux_rt_sigreturn_tramp_frame = {
- SIGTRAMP_FRAME,
- 4,
- {
- { CSKY_MOVI_R7_173, ULONGEST_MAX },
- { CSKY_TRAP_0, ULONGEST_MAX },
- { TRAMP_SENTINEL_INSN }
- },
- csky_linux_rt_sigreturn_init
- };
- /* Hook function for gdbarch_register_osabi. */
- static void
- csky_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
- {
- linux_init_abi (info, gdbarch, 0);
- /* Shared library handling. */
- set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
- set_gdbarch_skip_solib_resolver (gdbarch, glibc_skip_solib_resolver);
- set_solib_svr4_fetch_link_map_offsets (gdbarch,
- linux_ilp32_fetch_link_map_offsets);
- /* Enable TLS support. */
- set_gdbarch_fetch_tls_load_module_address (gdbarch,
- svr4_fetch_objfile_link_map);
- /* Core file support. */
- set_gdbarch_iterate_over_regset_sections (
- gdbarch, csky_linux_iterate_over_regset_sections);
- /* Append tramp frame unwinder for SIGNAL. */
- tramp_frame_prepend_unwinder (gdbarch,
- &csky_linux_rt_sigreturn_tramp_frame);
- }
- void _initialize_csky_linux_tdep ();
- void
- _initialize_csky_linux_tdep ()
- {
- gdbarch_register_osabi (bfd_arch_csky, 0, GDB_OSABI_LINUX,
- csky_linux_init_abi);
- }
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