}
+/* Implement elf_backend_grok_prstatus:
+ Support for core dump NOTE sections. */
+static bfd_boolean
+or1k_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
+{
+ int offset;
+ size_t size;
+
+ switch (note->descsz)
+ {
+ default:
+ return FALSE;
+
+ case 212: /* Linux/OpenRISC */
+ /* pr_cursig */
+ elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
+
+ /* pr_pid */
+ elf_tdata (abfd)->core->pid = bfd_get_32 (abfd, note->descdata + 24);
+
+ /* pr_reg */
+ offset = 72;
+ size = 132;
+
+ break;
+ }
+
+ /* Make a ".reg/999" section. */
+ return _bfd_elfcore_make_pseudosection (abfd, ".reg",
+ size, note->descpos + offset);
+}
+
+/* Implement elf_backend_grok_psinfo. */
+static bfd_boolean
+or1k_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
+{
+ switch (note->descsz)
+ {
+ default:
+ return FALSE;
+
+ case 128: /* Linux/OpenRISC elf_prpsinfo */
+ elf_tdata (abfd)->core->program
+ = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
+ elf_tdata (abfd)->core->command
+ = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
+ }
+
+ return TRUE;
+}
+
+
#define ELF_ARCH bfd_arch_or1k
#define ELF_MACHINE_CODE EM_OR1K
#define ELF_TARGET_ID OR1K_ELF_DATA
#define elf_backend_adjust_dynamic_symbol or1k_elf_adjust_dynamic_symbol
#define elf_backend_finish_dynamic_symbol or1k_elf_finish_dynamic_symbol
+#define elf_backend_grok_prstatus or1k_grok_prstatus
+#define elf_backend_grok_psinfo or1k_grok_psinfo
+
#include "elf32-target.h"
--- /dev/null
+/* Target-dependent code for GNU/Linux on OpenRISC processors.
+ Copyright (C) 2018 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 "or1k-tdep.h"
+#include "osabi.h"
+#include "glibc-tdep.h"
+#include "linux-tdep.h"
+#include "solib-svr4.h"
+#include "regset.h"
+#include "tramp-frame.h"
+#include "trad-frame.h"
+
+/* Define the general register mapping. The kernel puts the PC at offset 0,
+ gdb puts it at offset 32. Register x0 is always 0 and can be ignored.
+ Registers x1 to x31 are in the same place. */
+
+static const struct regcache_map_entry or1k_linux_gregmap[] =
+{
+ { 32, OR1K_ZERO_REGNUM, 4 }, /* r0 to r31 */
+ { 1, OR1K_NPC_REGNUM, 4 },
+ { 0 }
+};
+
+/* Define the general register regset. */
+
+static const struct regset or1k_linux_gregset =
+{
+ or1k_linux_gregmap, regcache_supply_regset, regcache_collect_regset
+};
+
+/* Define hook for core file support. */
+
+static void
+or1k_linux_iterate_over_regset_sections (struct gdbarch *gdbarch,
+ iterate_over_regset_sections_cb *cb,
+ void *cb_data,
+ const struct regcache *regcache)
+{
+ cb (".reg", (33 * 4), (33 * 4), &or1k_linux_gregset, NULL, cb_data);
+}
+
+/* Signal trampoline support. */
+
+static void or1k_linux_sigframe_init (const struct tramp_frame *self,
+ struct frame_info *this_frame,
+ struct trad_frame_cache *this_cache,
+ CORE_ADDR func);
+
+#define OR1K_RT_SIGRETURN 139
+
+#define OR1K_INST_L_ORI_R11_R0_IMM 0xa9600000
+#define OR1K_INST_L_SYS_1 0x20000001
+#define OR1K_INST_L_NOP 0x15000000
+
+static const struct tramp_frame or1k_linux_sigframe = {
+ SIGTRAMP_FRAME,
+ 4,
+ {
+ { OR1K_INST_L_ORI_R11_R0_IMM | OR1K_RT_SIGRETURN, ULONGEST_MAX },
+ { OR1K_INST_L_SYS_1, ULONGEST_MAX },
+ { OR1K_INST_L_NOP, ULONGEST_MAX },
+ { TRAMP_SENTINEL_INSN }
+ },
+ or1k_linux_sigframe_init,
+ NULL
+};
+
+/* Runtime signal frames look like this:
+ struct rt_sigframe {
+ struct siginfo info;
+ struct ucontext uc;
+ unsigned char retcode[16];
+ };
+
+ struct ucontext {
+ unsigned long uc_flags; - 4
+ struct ucontext *uc_link; - 4
+ stack_t uc_stack; - 4 * 3
+ struct sigcontext uc_mcontext;
+ sigset_t uc_sigmask;
+ };
+
+ struct sigcontext {
+ struct user_regs_struct regs;
+ unsigned long oldmask;
+ };
+
+ struct user_regs_struct {
+ unsigned long gpr[32];
+ unsigned long pc;
+ unsigned long sr;
+ }; */
+
+#define SIGFRAME_SIGINFO_SIZE 128
+#define UCONTEXT_MCONTEXT_OFFSET 20
+
+static void
+or1k_linux_sigframe_init (const struct tramp_frame *self,
+ struct frame_info *this_frame,
+ struct trad_frame_cache *this_cache,
+ CORE_ADDR func)
+{
+ CORE_ADDR frame_sp = get_frame_sp (this_frame);
+ CORE_ADDR mcontext_base;
+ CORE_ADDR regs_base;
+
+ mcontext_base = frame_sp + SIGFRAME_SIGINFO_SIZE + UCONTEXT_MCONTEXT_OFFSET;
+
+ /* Handle the general registers 0-31 followed by the PC. */
+ regs_base = mcontext_base;
+ for (int i = 0; i < 32; i++)
+ trad_frame_set_reg_addr (this_cache, OR1K_ZERO_REGNUM + i,
+ regs_base + (i * 4));
+ trad_frame_set_reg_addr (this_cache, OR1K_NPC_REGNUM, regs_base + (32 * 4));
+ trad_frame_set_reg_addr (this_cache, OR1K_SR_REGNUM, regs_base + (33 * 4));
+
+ /* Choice of the bottom of the sigframe is somewhat arbitrary. */
+ trad_frame_set_id (this_cache, frame_id_build (frame_sp, func));
+}
+
+/* Initialize OpenRISC Linux ABI info. */
+
+static void
+or1k_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
+{
+ linux_init_abi (info, gdbarch);
+
+ set_solib_svr4_fetch_link_map_offsets (gdbarch,
+ svr4_ilp32_fetch_link_map_offsets);
+
+ /* GNU/Linux uses SVR4-style shared libraries. */
+ set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
+
+ /* GNU/Linux uses the dynamic linker included in the GNU C Library. */
+ set_gdbarch_skip_solib_resolver (gdbarch, glibc_skip_solib_resolver);
+
+ /* Enable TLS support. */
+ set_gdbarch_fetch_tls_load_module_address (gdbarch,
+ svr4_fetch_objfile_link_map);
+
+ set_gdbarch_iterate_over_regset_sections
+ (gdbarch, or1k_linux_iterate_over_regset_sections);
+
+ tramp_frame_prepend_unwinder (gdbarch, &or1k_linux_sigframe);
+}
+
+/* Initialize OpenRISC Linux target support. */
+
+void
+_initialize_or1k_linux_tdep (void)
+{
+ gdbarch_register_osabi (bfd_arch_or1k, 0, GDB_OSABI_LINUX,
+ or1k_linux_init_abi);
+}
projects / binutils-gdb.git / commitdiff