/* Target-dependent code for GNU/Linux, architecture independent. Copyright (C) 2009, 2010, 2011 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 "gdbtypes.h" #include "linux-tdep.h" #include "auxv.h" #include "target.h" #include "elf/common.h" #include "inferior.h" static struct gdbarch_data *linux_gdbarch_data_handle; struct linux_gdbarch_data { struct type *siginfo_type; }; static void * init_linux_gdbarch_data (struct gdbarch *gdbarch) { return GDBARCH_OBSTACK_ZALLOC (gdbarch, struct linux_gdbarch_data); } static struct linux_gdbarch_data * get_linux_gdbarch_data (struct gdbarch *gdbarch) { return gdbarch_data (gdbarch, linux_gdbarch_data_handle); } /* This function is suitable for architectures that don't extend/override the standard siginfo structure. */ struct type * linux_get_siginfo_type (struct gdbarch *gdbarch) { struct linux_gdbarch_data *linux_gdbarch_data; struct type *int_type, *uint_type, *long_type, *void_ptr_type; struct type *uid_type, *pid_type; struct type *sigval_type, *clock_type; struct type *siginfo_type, *sifields_type; struct type *type; linux_gdbarch_data = get_linux_gdbarch_data (gdbarch); if (linux_gdbarch_data->siginfo_type != NULL) return linux_gdbarch_data->siginfo_type; int_type = arch_integer_type (gdbarch, gdbarch_int_bit (gdbarch), 0, "int"); uint_type = arch_integer_type (gdbarch, gdbarch_int_bit (gdbarch), 1, "unsigned int"); long_type = arch_integer_type (gdbarch, gdbarch_long_bit (gdbarch), 0, "long"); void_ptr_type = lookup_pointer_type (builtin_type (gdbarch)->builtin_void); /* sival_t */ sigval_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_UNION); TYPE_NAME (sigval_type) = xstrdup ("sigval_t"); append_composite_type_field (sigval_type, "sival_int", int_type); append_composite_type_field (sigval_type, "sival_ptr", void_ptr_type); /* __pid_t */ pid_type = arch_type (gdbarch, TYPE_CODE_TYPEDEF, TYPE_LENGTH (int_type), "__pid_t"); TYPE_TARGET_TYPE (pid_type) = int_type; TYPE_TARGET_STUB (pid_type) = 1; /* __uid_t */ uid_type = arch_type (gdbarch, TYPE_CODE_TYPEDEF, TYPE_LENGTH (uint_type), "__uid_t"); TYPE_TARGET_TYPE (uid_type) = uint_type; TYPE_TARGET_STUB (uid_type) = 1; /* __clock_t */ clock_type = arch_type (gdbarch, TYPE_CODE_TYPEDEF, TYPE_LENGTH (long_type), "__clock_t"); TYPE_TARGET_TYPE (clock_type) = long_type; TYPE_TARGET_STUB (clock_type) = 1; /* _sifields */ sifields_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_UNION); { const int si_max_size = 128; int si_pad_size; int size_of_int = gdbarch_int_bit (gdbarch) / HOST_CHAR_BIT; /* _pad */ if (gdbarch_ptr_bit (gdbarch) == 64) si_pad_size = (si_max_size / size_of_int) - 4; else si_pad_size = (si_max_size / size_of_int) - 3; append_composite_type_field (sifields_type, "_pad", init_vector_type (int_type, si_pad_size)); } /* _kill */ type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); append_composite_type_field (type, "si_pid", pid_type); append_composite_type_field (type, "si_uid", uid_type); append_composite_type_field (sifields_type, "_kill", type); /* _timer */ type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); append_composite_type_field (type, "si_tid", int_type); append_composite_type_field (type, "si_overrun", int_type); append_composite_type_field (type, "si_sigval", sigval_type); append_composite_type_field (sifields_type, "_timer", type); /* _rt */ type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); append_composite_type_field (type, "si_pid", pid_type); append_composite_type_field (type, "si_uid", uid_type); append_composite_type_field (type, "si_sigval", sigval_type); append_composite_type_field (sifields_type, "_rt", type); /* _sigchld */ type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); append_composite_type_field (type, "si_pid", pid_type); append_composite_type_field (type, "si_uid", uid_type); append_composite_type_field (type, "si_status", int_type); append_composite_type_field (type, "si_utime", clock_type); append_composite_type_field (type, "si_stime", clock_type); append_composite_type_field (sifields_type, "_sigchld", type); /* _sigfault */ type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); append_composite_type_field (type, "si_addr", void_ptr_type); append_composite_type_field (sifields_type, "_sigfault", type); /* _sigpoll */ type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); append_composite_type_field (type, "si_band", long_type); append_composite_type_field (type, "si_fd", int_type); append_composite_type_field (sifields_type, "_sigpoll", type); /* struct siginfo */ siginfo_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); TYPE_NAME (siginfo_type) = xstrdup ("siginfo"); append_composite_type_field (siginfo_type, "si_signo", int_type); append_composite_type_field (siginfo_type, "si_errno", int_type); append_composite_type_field (siginfo_type, "si_code", int_type); append_composite_type_field_aligned (siginfo_type, "_sifields", sifields_type, TYPE_LENGTH (long_type)); linux_gdbarch_data->siginfo_type = siginfo_type; return siginfo_type; } int linux_has_shared_address_space (void) { /* Determine whether we are running on uClinux or normal Linux kernel. */ CORE_ADDR dummy; int target_is_uclinux; target_is_uclinux = (target_auxv_search (¤t_target, AT_NULL, &dummy) > 0 && target_auxv_search (¤t_target, AT_PAGESZ, &dummy) == 0); return target_is_uclinux; } /* This is how we want PTIDs from core files to be printed. */ static char * linux_core_pid_to_str (struct gdbarch *gdbarch, ptid_t ptid) { static char buf[80]; if (ptid_get_lwp (ptid) != 0) { snprintf (buf, sizeof (buf), "LWP %ld", ptid_get_lwp (ptid)); return buf; } return normal_pid_to_str (ptid); } /* To be called from the various GDB_OSABI_LINUX handlers for the various GNU/Linux architectures and machine types. */ void linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) { set_gdbarch_core_pid_to_str (gdbarch, linux_core_pid_to_str); } void _initialize_linux_tdep (void) { linux_gdbarch_data_handle = gdbarch_data_register_post_init (init_linux_gdbarch_data); }