/* Target-dependent code for GNU/Linux i386. Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2009 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 . */ #include "defs.h" #include "gdbcore.h" #include "frame.h" #include "value.h" #include "regcache.h" #include "inferior.h" #include "osabi.h" #include "reggroups.h" #include "dwarf2-frame.h" #include "gdb_string.h" #include "i386-tdep.h" #include "i386-linux-tdep.h" #include "linux-tdep.h" #include "glibc-tdep.h" #include "solib-svr4.h" #include "symtab.h" #include "arch-utils.h" #include "regset.h" #include "record.h" #include "linux-record.h" #include /* Supported register note sections. */ static struct core_regset_section i386_linux_regset_sections[] = { { ".reg", 144 }, { ".reg2", 108 }, { ".reg-xfp", 512 }, { NULL, 0 } }; /* Return the name of register REG. */ static const char * i386_linux_register_name (struct gdbarch *gdbarch, int reg) { /* Deal with the extra "orig_eax" pseudo register. */ if (reg == I386_LINUX_ORIG_EAX_REGNUM) return "orig_eax"; return i386_register_name (gdbarch, reg); } /* Return non-zero, when the register is in the corresponding register group. Put the LINUX_ORIG_EAX register in the system group. */ static int i386_linux_register_reggroup_p (struct gdbarch *gdbarch, int regnum, struct reggroup *group) { if (regnum == I386_LINUX_ORIG_EAX_REGNUM) return (group == system_reggroup || group == save_reggroup || group == restore_reggroup); return i386_register_reggroup_p (gdbarch, regnum, group); } /* Recognizing signal handler frames. */ /* GNU/Linux has two flavors of signals. Normal signal handlers, and "realtime" (RT) signals. The RT signals can provide additional information to the signal handler if the SA_SIGINFO flag is set when establishing a signal handler using `sigaction'. It is not unlikely that future versions of GNU/Linux will support SA_SIGINFO for normal signals too. */ /* When the i386 Linux kernel calls a signal handler and the SA_RESTORER flag isn't set, the return address points to a bit of code on the stack. This function returns whether the PC appears to be within this bit of code. The instruction sequence for normal signals is pop %eax mov $0x77, %eax int $0x80 or 0x58 0xb8 0x77 0x00 0x00 0x00 0xcd 0x80. Checking for the code sequence should be somewhat reliable, because the effect is to call the system call sigreturn. This is unlikely to occur anywhere other than in a signal trampoline. It kind of sucks that we have to read memory from the process in order to identify a signal trampoline, but there doesn't seem to be any other way. Therefore we only do the memory reads if no function name could be identified, which should be the case since the code is on the stack. Detection of signal trampolines for handlers that set the SA_RESTORER flag is in general not possible. Unfortunately this is what the GNU C Library has been doing for quite some time now. However, as of version 2.1.2, the GNU C Library uses signal trampolines (named __restore and __restore_rt) that are identical to the ones used by the kernel. Therefore, these trampolines are supported too. */ #define LINUX_SIGTRAMP_INSN0 0x58 /* pop %eax */ #define LINUX_SIGTRAMP_OFFSET0 0 #define LINUX_SIGTRAMP_INSN1 0xb8 /* mov $NNNN, %eax */ #define LINUX_SIGTRAMP_OFFSET1 1 #define LINUX_SIGTRAMP_INSN2 0xcd /* int */ #define LINUX_SIGTRAMP_OFFSET2 6 static const gdb_byte linux_sigtramp_code[] = { LINUX_SIGTRAMP_INSN0, /* pop %eax */ LINUX_SIGTRAMP_INSN1, 0x77, 0x00, 0x00, 0x00, /* mov $0x77, %eax */ LINUX_SIGTRAMP_INSN2, 0x80 /* int $0x80 */ }; #define LINUX_SIGTRAMP_LEN (sizeof linux_sigtramp_code) /* If THIS_FRAME is a sigtramp routine, return the address of the start of the routine. Otherwise, return 0. */ static CORE_ADDR i386_linux_sigtramp_start (struct frame_info *this_frame) { CORE_ADDR pc = get_frame_pc (this_frame); gdb_byte buf[LINUX_SIGTRAMP_LEN]; /* We only recognize a signal trampoline if PC is at the start of one of the three instructions. We optimize for finding the PC at the start, as will be the case when the trampoline is not the first frame on the stack. We assume that in the case where the PC is not at the start of the instruction sequence, there will be a few trailing readable bytes on the stack. */ if (!safe_frame_unwind_memory (this_frame, pc, buf, LINUX_SIGTRAMP_LEN)) return 0; if (buf[0] != LINUX_SIGTRAMP_INSN0) { int adjust; switch (buf[0]) { case LINUX_SIGTRAMP_INSN1: adjust = LINUX_SIGTRAMP_OFFSET1; break; case LINUX_SIGTRAMP_INSN2: adjust = LINUX_SIGTRAMP_OFFSET2; break; default: return 0; } pc -= adjust; if (!safe_frame_unwind_memory (this_frame, pc, buf, LINUX_SIGTRAMP_LEN)) return 0; } if (memcmp (buf, linux_sigtramp_code, LINUX_SIGTRAMP_LEN) != 0) return 0; return pc; } /* This function does the same for RT signals. Here the instruction sequence is mov $0xad, %eax int $0x80 or 0xb8 0xad 0x00 0x00 0x00 0xcd 0x80. The effect is to call the system call rt_sigreturn. */ #define LINUX_RT_SIGTRAMP_INSN0 0xb8 /* mov $NNNN, %eax */ #define LINUX_RT_SIGTRAMP_OFFSET0 0 #define LINUX_RT_SIGTRAMP_INSN1 0xcd /* int */ #define LINUX_RT_SIGTRAMP_OFFSET1 5 static const gdb_byte linux_rt_sigtramp_code[] = { LINUX_RT_SIGTRAMP_INSN0, 0xad, 0x00, 0x00, 0x00, /* mov $0xad, %eax */ LINUX_RT_SIGTRAMP_INSN1, 0x80 /* int $0x80 */ }; #define LINUX_RT_SIGTRAMP_LEN (sizeof linux_rt_sigtramp_code) /* If THIS_FRAME is an RT sigtramp routine, return the address of the start of the routine. Otherwise, return 0. */ static CORE_ADDR i386_linux_rt_sigtramp_start (struct frame_info *this_frame) { CORE_ADDR pc = get_frame_pc (this_frame); gdb_byte buf[LINUX_RT_SIGTRAMP_LEN]; /* We only recognize a signal trampoline if PC is at the start of one of the two instructions. We optimize for finding the PC at the start, as will be the case when the trampoline is not the first frame on the stack. We assume that in the case where the PC is not at the start of the instruction sequence, there will be a few trailing readable bytes on the stack. */ if (!safe_frame_unwind_memory (this_frame, pc, buf, LINUX_RT_SIGTRAMP_LEN)) return 0; if (buf[0] != LINUX_RT_SIGTRAMP_INSN0) { if (buf[0] != LINUX_RT_SIGTRAMP_INSN1) return 0; pc -= LINUX_RT_SIGTRAMP_OFFSET1; if (!safe_frame_unwind_memory (this_frame, pc, buf, LINUX_RT_SIGTRAMP_LEN)) return 0; } if (memcmp (buf, linux_rt_sigtramp_code, LINUX_RT_SIGTRAMP_LEN) != 0) return 0; return pc; } /* Return whether THIS_FRAME corresponds to a GNU/Linux sigtramp routine. */ static int i386_linux_sigtramp_p (struct frame_info *this_frame) { CORE_ADDR pc = get_frame_pc (this_frame); char *name; find_pc_partial_function (pc, &name, NULL, NULL); /* If we have NAME, we can optimize the search. The trampolines are named __restore and __restore_rt. However, they aren't dynamically exported from the shared C library, so the trampoline may appear to be part of the preceding function. This should always be sigaction, __sigaction, or __libc_sigaction (all aliases to the same function). */ if (name == NULL || strstr (name, "sigaction") != NULL) return (i386_linux_sigtramp_start (this_frame) != 0 || i386_linux_rt_sigtramp_start (this_frame) != 0); return (strcmp ("__restore", name) == 0 || strcmp ("__restore_rt", name) == 0); } /* Return one if the PC of THIS_FRAME is in a signal trampoline which may have DWARF-2 CFI. */ static int i386_linux_dwarf_signal_frame_p (struct gdbarch *gdbarch, struct frame_info *this_frame) { CORE_ADDR pc = get_frame_pc (this_frame); char *name; find_pc_partial_function (pc, &name, NULL, NULL); /* If a vsyscall DSO is in use, the signal trampolines may have these names. */ if (name && (strcmp (name, "__kernel_sigreturn") == 0 || strcmp (name, "__kernel_rt_sigreturn") == 0)) return 1; return 0; } /* Offset to struct sigcontext in ucontext, from . */ #define I386_LINUX_UCONTEXT_SIGCONTEXT_OFFSET 20 /* Assuming THIS_FRAME is a GNU/Linux sigtramp routine, return the address of the associated sigcontext structure. */ static CORE_ADDR i386_linux_sigcontext_addr (struct frame_info *this_frame) { CORE_ADDR pc; CORE_ADDR sp; gdb_byte buf[4]; get_frame_register (this_frame, I386_ESP_REGNUM, buf); sp = extract_unsigned_integer (buf, 4); pc = i386_linux_sigtramp_start (this_frame); if (pc) { /* The sigcontext structure lives on the stack, right after the signum argument. We determine the address of the sigcontext structure by looking at the frame's stack pointer. Keep in mind that the first instruction of the sigtramp code is "pop %eax". If the PC is after this instruction, adjust the returned value accordingly. */ if (pc == get_frame_pc (this_frame)) return sp + 4; return sp; } pc = i386_linux_rt_sigtramp_start (this_frame); if (pc) { CORE_ADDR ucontext_addr; /* The sigcontext structure is part of the user context. A pointer to the user context is passed as the third argument to the signal handler. */ read_memory (sp + 8, buf, 4); ucontext_addr = extract_unsigned_integer (buf, 4); return ucontext_addr + I386_LINUX_UCONTEXT_SIGCONTEXT_OFFSET; } error (_("Couldn't recognize signal trampoline.")); return 0; } /* Set the program counter for process PTID to PC. */ static void i386_linux_write_pc (struct regcache *regcache, CORE_ADDR pc) { regcache_cooked_write_unsigned (regcache, I386_EIP_REGNUM, pc); /* We must be careful with modifying the program counter. If we just interrupted a system call, the kernel might try to restart it when we resume the inferior. On restarting the system call, the kernel will try backing up the program counter even though it no longer points at the system call. This typically results in a SIGSEGV or SIGILL. We can prevent this by writing `-1' in the "orig_eax" pseudo-register. Note that "orig_eax" is saved when setting up a dummy call frame. This means that it is properly restored when that frame is popped, and that the interrupted system call will be restarted when we resume the inferior on return from a function call from within GDB. In all other cases the system call will not be restarted. */ regcache_cooked_write_unsigned (regcache, I386_LINUX_ORIG_EAX_REGNUM, -1); } /* Parse the arguments of current system call instruction and record the values of the registers and memory that will be changed into "record_arch_list". This instruction is "int 0x80" (Linux Kernel2.4) or "sysenter" (Linux Kernel 2.6). Return -1 if something wrong. */ static struct linux_record_tdep i386_linux_record_tdep; static int i386_linux_intx80_sysenter_record (struct regcache *regcache) { int ret; uint32_t tmpu32; regcache_raw_read (regcache, I386_EAX_REGNUM, (gdb_byte *)&tmpu32); ret = record_linux_system_call (tmpu32, regcache, &i386_linux_record_tdep); if (ret) return ret; /* Record the return value of the system call. */ if (record_arch_list_add_reg (regcache, I386_EAX_REGNUM)) return -1; return 0; } /* The register sets used in GNU/Linux ELF core-dumps are identical to the register sets in `struct user' that are used for a.out core-dumps. These are also used by ptrace(2). The corresponding types are `elf_gregset_t' for the general-purpose registers (with `elf_greg_t' the type of a single GP register) and `elf_fpregset_t' for the floating-point registers. Those types used to be available under the names `gregset_t' and `fpregset_t' too, and GDB used those names in the past. But those names are now used for the register sets used in the `mcontext_t' type, which have a different size and layout. */ /* Mapping between the general-purpose registers in `struct user' format and GDB's register cache layout. */ /* From . */ static int i386_linux_gregset_reg_offset[] = { 6 * 4, /* %eax */ 1 * 4, /* %ecx */ 2 * 4, /* %edx */ 0 * 4, /* %ebx */ 15 * 4, /* %esp */ 5 * 4, /* %ebp */ 3 * 4, /* %esi */ 4 * 4, /* %edi */ 12 * 4, /* %eip */ 14 * 4, /* %eflags */ 13 * 4, /* %cs */ 16 * 4, /* %ss */ 7 * 4, /* %ds */ 8 * 4, /* %es */ 9 * 4, /* %fs */ 10 * 4, /* %gs */ -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 11 * 4 /* "orig_eax" */ }; /* Mapping between the general-purpose registers in `struct sigcontext' format and GDB's register cache layout. */ /* From . */ static int i386_linux_sc_reg_offset[] = { 11 * 4, /* %eax */ 10 * 4, /* %ecx */ 9 * 4, /* %edx */ 8 * 4, /* %ebx */ 7 * 4, /* %esp */ 6 * 4, /* %ebp */ 5 * 4, /* %esi */ 4 * 4, /* %edi */ 14 * 4, /* %eip */ 16 * 4, /* %eflags */ 15 * 4, /* %cs */ 18 * 4, /* %ss */ 3 * 4, /* %ds */ 2 * 4, /* %es */ 1 * 4, /* %fs */ 0 * 4 /* %gs */ }; /* These macros are the size of the type that will be used in a system call. The values of these macros were obtained from Linux Kernel source. */ #define I386_LINUX_RECORD_SIZE__old_kernel_stat 32 #define I386_LINUX_RECORD_SIZE_tms 16 #define I386_LINUX_RECORD_SIZE_loff_t 8 #define I386_LINUX_RECORD_SIZE_flock 16 #define I386_LINUX_RECORD_SIZE_oldold_utsname 45 #define I386_LINUX_RECORD_SIZE_ustat 20 #define I386_LINUX_RECORD_SIZE_old_sigaction 140 #define I386_LINUX_RECORD_SIZE_old_sigset_t 128 #define I386_LINUX_RECORD_SIZE_rlimit 8 #define I386_LINUX_RECORD_SIZE_rusage 72 #define I386_LINUX_RECORD_SIZE_timeval 8 #define I386_LINUX_RECORD_SIZE_timezone 8 #define I386_LINUX_RECORD_SIZE_old_gid_t 2 #define I386_LINUX_RECORD_SIZE_old_uid_t 2 #define I386_LINUX_RECORD_SIZE_fd_set 128 #define I386_LINUX_RECORD_SIZE_dirent 268 #define I386_LINUX_RECORD_SIZE_dirent64 276 #define I386_LINUX_RECORD_SIZE_statfs 64 #define I386_LINUX_RECORD_SIZE_statfs64 84 #define I386_LINUX_RECORD_SIZE_sockaddr 16 #define I386_LINUX_RECORD_SIZE_int 4 #define I386_LINUX_RECORD_SIZE_long 4 #define I386_LINUX_RECORD_SIZE_ulong 4 #define I386_LINUX_RECORD_SIZE_msghdr 28 #define I386_LINUX_RECORD_SIZE_itimerval 16 #define I386_LINUX_RECORD_SIZE_stat 88 #define I386_LINUX_RECORD_SIZE_old_utsname 325 #define I386_LINUX_RECORD_SIZE_sysinfo 64 #define I386_LINUX_RECORD_SIZE_msqid_ds 88 #define I386_LINUX_RECORD_SIZE_shmid_ds 84 #define I386_LINUX_RECORD_SIZE_new_utsname 390 #define I386_LINUX_RECORD_SIZE_timex 128 #define I386_LINUX_RECORD_SIZE_mem_dqinfo 24 #define I386_LINUX_RECORD_SIZE_if_dqblk 68 #define I386_LINUX_RECORD_SIZE_fs_quota_stat 68 #define I386_LINUX_RECORD_SIZE_timespec 8 #define I386_LINUX_RECORD_SIZE_pollfd 8 #define I386_LINUX_RECORD_SIZE_NFS_FHSIZE 32 #define I386_LINUX_RECORD_SIZE_knfsd_fh 132 #define I386_LINUX_RECORD_SIZE_TASK_COMM_LEN 16 #define I386_LINUX_RECORD_SIZE_sigaction 140 #define I386_LINUX_RECORD_SIZE_sigset_t 8 #define I386_LINUX_RECORD_SIZE_siginfo_t 128 #define I386_LINUX_RECORD_SIZE_cap_user_data_t 12 #define I386_LINUX_RECORD_SIZE_stack_t 12 #define I386_LINUX_RECORD_SIZE_off_t I386_LINUX_RECORD_SIZE_long #define I386_LINUX_RECORD_SIZE_stat64 96 #define I386_LINUX_RECORD_SIZE_gid_t 2 #define I386_LINUX_RECORD_SIZE_uid_t 2 #define I386_LINUX_RECORD_SIZE_PAGE_SIZE 4096 #define I386_LINUX_RECORD_SIZE_flock64 24 #define I386_LINUX_RECORD_SIZE_user_desc 16 #define I386_LINUX_RECORD_SIZE_io_event 32 #define I386_LINUX_RECORD_SIZE_iocb 64 #define I386_LINUX_RECORD_SIZE_epoll_event 12 #define I386_LINUX_RECORD_SIZE_itimerspec (I386_LINUX_RECORD_SIZE_timespec * 2) #define I386_LINUX_RECORD_SIZE_mq_attr 32 #define I386_LINUX_RECORD_SIZE_siginfo 128 #define I386_LINUX_RECORD_SIZE_termios 36 #define I386_LINUX_RECORD_SIZE_termios2 44 #define I386_LINUX_RECORD_SIZE_pid_t 4 #define I386_LINUX_RECORD_SIZE_winsize 8 #define I386_LINUX_RECORD_SIZE_char 8 #define I386_LINUX_RECORD_SIZE_serial_struct 60 #define I386_LINUX_RECORD_SIZE_serial_icounter_struct 80 #define I386_LINUX_RECORD_SIZE_hayes_esp_config 12 /* These macros are the values of the second argument of system call "sys_ioctl". The values of these macros were obtained from Linux Kernel source. */ #define I386_LINUX_RECORD_IOCTL_TCGETS 0x5401 #define I386_LINUX_RECORD_IOCTL_TCSETS 0x5402 #define I386_LINUX_RECORD_IOCTL_TCSETSW 0x5403 #define I386_LINUX_RECORD_IOCTL_TCSETSF 0x5404 #define I386_LINUX_RECORD_IOCTL_TCGETA 0x5405 #define I386_LINUX_RECORD_IOCTL_TCSETA 0x5406 #define I386_LINUX_RECORD_IOCTL_TCSETAW 0x5407 #define I386_LINUX_RECORD_IOCTL_TCSETAF 0x5408 #define I386_LINUX_RECORD_IOCTL_TCSBRK 0x5409 #define I386_LINUX_RECORD_IOCTL_TCXONC 0x540A #define I386_LINUX_RECORD_IOCTL_TCFLSH 0x540B #define I386_LINUX_RECORD_IOCTL_TIOCEXCL 0x540C #define I386_LINUX_RECORD_IOCTL_TIOCNXCL 0x540D #define I386_LINUX_RECORD_IOCTL_TIOCSCTTY 0x540E #define I386_LINUX_RECORD_IOCTL_TIOCGPGRP 0x540F #define I386_LINUX_RECORD_IOCTL_TIOCSPGRP 0x5410 #define I386_LINUX_RECORD_IOCTL_TIOCOUTQ 0x5411 #define I386_LINUX_RECORD_IOCTL_TIOCSTI 0x5412 #define I386_LINUX_RECORD_IOCTL_TIOCGWINSZ 0x5413 #define I386_LINUX_RECORD_IOCTL_TIOCSWINSZ 0x5414 #define I386_LINUX_RECORD_IOCTL_TIOCMGET 0x5415 #define I386_LINUX_RECORD_IOCTL_TIOCMBIS 0x5416 #define I386_LINUX_RECORD_IOCTL_TIOCMBIC 0x5417 #define I386_LINUX_RECORD_IOCTL_TIOCMSET 0x5418 #define I386_LINUX_RECORD_IOCTL_TIOCGSOFTCAR 0x5419 #define I386_LINUX_RECORD_IOCTL_TIOCSSOFTCAR 0x541A #define I386_LINUX_RECORD_IOCTL_FIONREAD 0x541B #define I386_LINUX_RECORD_IOCTL_TIOCINQ I386_LINUX_RECORD_IOCTL_FIONREAD #define I386_LINUX_RECORD_IOCTL_TIOCLINUX 0x541C #define I386_LINUX_RECORD_IOCTL_TIOCCONS 0x541D #define I386_LINUX_RECORD_IOCTL_TIOCGSERIAL 0x541E #define I386_LINUX_RECORD_IOCTL_TIOCSSERIAL 0x541F #define I386_LINUX_RECORD_IOCTL_TIOCPKT 0x5420 #define I386_LINUX_RECORD_IOCTL_FIONBIO 0x5421 #define I386_LINUX_RECORD_IOCTL_TIOCNOTTY 0x5422 #define I386_LINUX_RECORD_IOCTL_TIOCSETD 0x5423 #define I386_LINUX_RECORD_IOCTL_TIOCGETD 0x5424 #define I386_LINUX_RECORD_IOCTL_TCSBRKP 0x5425 #define I386_LINUX_RECORD_IOCTL_TIOCTTYGSTRUCT 0x5426 #define I386_LINUX_RECORD_IOCTL_TIOCSBRK 0x5427 #define I386_LINUX_RECORD_IOCTL_TIOCCBRK 0x5428 #define I386_LINUX_RECORD_IOCTL_TIOCGSID 0x5429 #define I386_LINUX_RECORD_IOCTL_TCGETS2 0x802c542a #define I386_LINUX_RECORD_IOCTL_TCSETS2 0x402c542b #define I386_LINUX_RECORD_IOCTL_TCSETSW2 0x402c542c #define I386_LINUX_RECORD_IOCTL_TCSETSF2 0x402c542d #define I386_LINUX_RECORD_IOCTL_TIOCGPTN 0x80045430 #define I386_LINUX_RECORD_IOCTL_TIOCSPTLCK 0x40045431 #define I386_LINUX_RECORD_IOCTL_FIONCLEX 0x5450 #define I386_LINUX_RECORD_IOCTL_FIOCLEX 0x5451 #define I386_LINUX_RECORD_IOCTL_FIOASYNC 0x5452 #define I386_LINUX_RECORD_IOCTL_TIOCSERCONFIG 0x5453 #define I386_LINUX_RECORD_IOCTL_TIOCSERGWILD 0x5454 #define I386_LINUX_RECORD_IOCTL_TIOCSERSWILD 0x5455 #define I386_LINUX_RECORD_IOCTL_TIOCGLCKTRMIOS 0x5456 #define I386_LINUX_RECORD_IOCTL_TIOCSLCKTRMIOS 0x5457 #define I386_LINUX_RECORD_IOCTL_TIOCSERGSTRUCT 0x5458 #define I386_LINUX_RECORD_IOCTL_TIOCSERGETLSR 0x5459 #define I386_LINUX_RECORD_IOCTL_TIOCSERGETMULTI 0x545A #define I386_LINUX_RECORD_IOCTL_TIOCSERSETMULTI 0x545B #define I386_LINUX_RECORD_IOCTL_TIOCMIWAIT 0x545C #define I386_LINUX_RECORD_IOCTL_TIOCGICOUNT 0x545D #define I386_LINUX_RECORD_IOCTL_TIOCGHAYESESP 0x545E #define I386_LINUX_RECORD_IOCTL_TIOCSHAYESESP 0x545F #define I386_LINUX_RECORD_IOCTL_FIOQSIZE 0x5460 static void i386_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) { struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); /* GNU/Linux uses ELF. */ i386_elf_init_abi (info, gdbarch); /* Since we have the extra "orig_eax" register on GNU/Linux, we have to adjust a few things. */ set_gdbarch_write_pc (gdbarch, i386_linux_write_pc); set_gdbarch_num_regs (gdbarch, I386_LINUX_NUM_REGS); set_gdbarch_register_name (gdbarch, i386_linux_register_name); set_gdbarch_register_reggroup_p (gdbarch, i386_linux_register_reggroup_p); tdep->gregset_reg_offset = i386_linux_gregset_reg_offset; tdep->gregset_num_regs = ARRAY_SIZE (i386_linux_gregset_reg_offset); tdep->sizeof_gregset = 17 * 4; tdep->jb_pc_offset = 20; /* From . */ tdep->sigtramp_p = i386_linux_sigtramp_p; tdep->sigcontext_addr = i386_linux_sigcontext_addr; tdep->sc_reg_offset = i386_linux_sc_reg_offset; tdep->sc_num_regs = ARRAY_SIZE (i386_linux_sc_reg_offset); /* Initialize the i386_linux_record_tdep. */ i386_linux_record_tdep.size__old_kernel_stat = I386_LINUX_RECORD_SIZE__old_kernel_stat; i386_linux_record_tdep.size_tms = I386_LINUX_RECORD_SIZE_tms; i386_linux_record_tdep.size_loff_t = I386_LINUX_RECORD_SIZE_loff_t; i386_linux_record_tdep.size_flock = I386_LINUX_RECORD_SIZE_flock; i386_linux_record_tdep.size_oldold_utsname = I386_LINUX_RECORD_SIZE_oldold_utsname; i386_linux_record_tdep.size_ustat = I386_LINUX_RECORD_SIZE_ustat; i386_linux_record_tdep.size_old_sigaction = I386_LINUX_RECORD_SIZE_old_sigaction; i386_linux_record_tdep.size_old_sigset_t = I386_LINUX_RECORD_SIZE_old_sigset_t; i386_linux_record_tdep.size_rlimit = I386_LINUX_RECORD_SIZE_rlimit; i386_linux_record_tdep.size_rusage = I386_LINUX_RECORD_SIZE_rusage; i386_linux_record_tdep.size_timeval = I386_LINUX_RECORD_SIZE_timeval; i386_linux_record_tdep.size_timezone = I386_LINUX_RECORD_SIZE_timezone; i386_linux_record_tdep.size_old_gid_t = I386_LINUX_RECORD_SIZE_old_gid_t; i386_linux_record_tdep.size_old_uid_t = I386_LINUX_RECORD_SIZE_old_uid_t; i386_linux_record_tdep.size_fd_set = I386_LINUX_RECORD_SIZE_fd_set; i386_linux_record_tdep.size_dirent = I386_LINUX_RECORD_SIZE_dirent; i386_linux_record_tdep.size_dirent64 = I386_LINUX_RECORD_SIZE_dirent64; i386_linux_record_tdep.size_statfs = I386_LINUX_RECORD_SIZE_statfs; i386_linux_record_tdep.size_statfs64 = I386_LINUX_RECORD_SIZE_statfs64; i386_linux_record_tdep.size_sockaddr = I386_LINUX_RECORD_SIZE_sockaddr; i386_linux_record_tdep.size_int = I386_LINUX_RECORD_SIZE_int; i386_linux_record_tdep.size_long = I386_LINUX_RECORD_SIZE_long; i386_linux_record_tdep.size_ulong = I386_LINUX_RECORD_SIZE_ulong; i386_linux_record_tdep.size_msghdr = I386_LINUX_RECORD_SIZE_msghdr; i386_linux_record_tdep.size_itimerval = I386_LINUX_RECORD_SIZE_itimerval; i386_linux_record_tdep.size_stat = I386_LINUX_RECORD_SIZE_stat; i386_linux_record_tdep.size_old_utsname = I386_LINUX_RECORD_SIZE_old_utsname; i386_linux_record_tdep.size_sysinfo = I386_LINUX_RECORD_SIZE_sysinfo; i386_linux_record_tdep.size_msqid_ds = I386_LINUX_RECORD_SIZE_msqid_ds; i386_linux_record_tdep.size_shmid_ds = I386_LINUX_RECORD_SIZE_shmid_ds; i386_linux_record_tdep.size_new_utsname = I386_LINUX_RECORD_SIZE_new_utsname; i386_linux_record_tdep.size_timex = I386_LINUX_RECORD_SIZE_timex; i386_linux_record_tdep.size_mem_dqinfo = I386_LINUX_RECORD_SIZE_mem_dqinfo; i386_linux_record_tdep.size_if_dqblk = I386_LINUX_RECORD_SIZE_if_dqblk; i386_linux_record_tdep.size_fs_quota_stat = I386_LINUX_RECORD_SIZE_fs_quota_stat; i386_linux_record_tdep.size_timespec = I386_LINUX_RECORD_SIZE_timespec; i386_linux_record_tdep.size_pollfd = I386_LINUX_RECORD_SIZE_pollfd; i386_linux_record_tdep.size_NFS_FHSIZE = I386_LINUX_RECORD_SIZE_NFS_FHSIZE; i386_linux_record_tdep.size_knfsd_fh = I386_LINUX_RECORD_SIZE_knfsd_fh; i386_linux_record_tdep.size_TASK_COMM_LEN = I386_LINUX_RECORD_SIZE_TASK_COMM_LEN; i386_linux_record_tdep.size_sigaction = I386_LINUX_RECORD_SIZE_sigaction; i386_linux_record_tdep.size_sigset_t = I386_LINUX_RECORD_SIZE_sigset_t; i386_linux_record_tdep.size_siginfo_t = I386_LINUX_RECORD_SIZE_siginfo_t; i386_linux_record_tdep.size_cap_user_data_t = I386_LINUX_RECORD_SIZE_cap_user_data_t; i386_linux_record_tdep.size_stack_t = I386_LINUX_RECORD_SIZE_stack_t; i386_linux_record_tdep.size_off_t = I386_LINUX_RECORD_SIZE_off_t; i386_linux_record_tdep.size_stat64 = I386_LINUX_RECORD_SIZE_stat64; i386_linux_record_tdep.size_gid_t = I386_LINUX_RECORD_SIZE_gid_t; i386_linux_record_tdep.size_uid_t = I386_LINUX_RECORD_SIZE_uid_t; i386_linux_record_tdep.size_PAGE_SIZE = I386_LINUX_RECORD_SIZE_PAGE_SIZE; i386_linux_record_tdep.size_flock64 = I386_LINUX_RECORD_SIZE_flock64; i386_linux_record_tdep.size_user_desc = I386_LINUX_RECORD_SIZE_user_desc; i386_linux_record_tdep.size_io_event = I386_LINUX_RECORD_SIZE_io_event; i386_linux_record_tdep.size_iocb = I386_LINUX_RECORD_SIZE_iocb; i386_linux_record_tdep.size_epoll_event = I386_LINUX_RECORD_SIZE_epoll_event; i386_linux_record_tdep.size_itimerspec = I386_LINUX_RECORD_SIZE_itimerspec; i386_linux_record_tdep.size_mq_attr = I386_LINUX_RECORD_SIZE_mq_attr; i386_linux_record_tdep.size_siginfo = I386_LINUX_RECORD_SIZE_siginfo; i386_linux_record_tdep.size_termios = I386_LINUX_RECORD_SIZE_termios; i386_linux_record_tdep.size_termios2 = I386_LINUX_RECORD_SIZE_termios2; i386_linux_record_tdep.size_pid_t = I386_LINUX_RECORD_SIZE_pid_t; i386_linux_record_tdep.size_winsize = I386_LINUX_RECORD_SIZE_winsize; i386_linux_record_tdep.size_char = I386_LINUX_RECORD_SIZE_char; i386_linux_record_tdep.size_serial_struct = I386_LINUX_RECORD_SIZE_serial_struct; i386_linux_record_tdep.size_serial_icounter_struct = I386_LINUX_RECORD_SIZE_serial_icounter_struct; i386_linux_record_tdep.size_hayes_esp_config = I386_LINUX_RECORD_SIZE_hayes_esp_config; i386_linux_record_tdep.ioctl_TCGETS = I386_LINUX_RECORD_IOCTL_TCGETS; i386_linux_record_tdep.ioctl_TCSETS = I386_LINUX_RECORD_IOCTL_TCSETS; i386_linux_record_tdep.ioctl_TCSETSW = I386_LINUX_RECORD_IOCTL_TCSETSW; i386_linux_record_tdep.ioctl_TCSETSF = I386_LINUX_RECORD_IOCTL_TCSETSF; i386_linux_record_tdep.ioctl_TCGETA = I386_LINUX_RECORD_IOCTL_TCGETA; i386_linux_record_tdep.ioctl_TCSETA = I386_LINUX_RECORD_IOCTL_TCSETA; i386_linux_record_tdep.ioctl_TCSETAW = I386_LINUX_RECORD_IOCTL_TCSETAW; i386_linux_record_tdep.ioctl_TCSETAF = I386_LINUX_RECORD_IOCTL_TCSETAF; i386_linux_record_tdep.ioctl_TCSBRK = I386_LINUX_RECORD_IOCTL_TCSBRK; i386_linux_record_tdep.ioctl_TCXONC = I386_LINUX_RECORD_IOCTL_TCXONC; i386_linux_record_tdep.ioctl_TCFLSH = I386_LINUX_RECORD_IOCTL_TCFLSH; i386_linux_record_tdep.ioctl_TIOCEXCL = I386_LINUX_RECORD_IOCTL_TIOCEXCL; i386_linux_record_tdep.ioctl_TIOCNXCL = I386_LINUX_RECORD_IOCTL_TIOCNXCL; i386_linux_record_tdep.ioctl_TIOCSCTTY = I386_LINUX_RECORD_IOCTL_TIOCSCTTY; i386_linux_record_tdep.ioctl_TIOCGPGRP = I386_LINUX_RECORD_IOCTL_TIOCGPGRP; i386_linux_record_tdep.ioctl_TIOCSPGRP = I386_LINUX_RECORD_IOCTL_TIOCSPGRP; i386_linux_record_tdep.ioctl_TIOCOUTQ = I386_LINUX_RECORD_IOCTL_TIOCOUTQ; i386_linux_record_tdep.ioctl_TIOCSTI = I386_LINUX_RECORD_IOCTL_TIOCSTI; i386_linux_record_tdep.ioctl_TIOCGWINSZ = I386_LINUX_RECORD_IOCTL_TIOCGWINSZ; i386_linux_record_tdep.ioctl_TIOCSWINSZ = I386_LINUX_RECORD_IOCTL_TIOCSWINSZ; i386_linux_record_tdep.ioctl_TIOCMGET = I386_LINUX_RECORD_IOCTL_TIOCMGET; i386_linux_record_tdep.ioctl_TIOCMBIS = I386_LINUX_RECORD_IOCTL_TIOCMBIS; i386_linux_record_tdep.ioctl_TIOCMBIC = I386_LINUX_RECORD_IOCTL_TIOCMBIC; i386_linux_record_tdep.ioctl_TIOCMSET = I386_LINUX_RECORD_IOCTL_TIOCMSET; i386_linux_record_tdep.ioctl_TIOCGSOFTCAR = I386_LINUX_RECORD_IOCTL_TIOCGSOFTCAR; i386_linux_record_tdep.ioctl_TIOCSSOFTCAR = I386_LINUX_RECORD_IOCTL_TIOCSSOFTCAR; i386_linux_record_tdep.ioctl_FIONREAD = I386_LINUX_RECORD_IOCTL_FIONREAD; i386_linux_record_tdep.ioctl_TIOCINQ = I386_LINUX_RECORD_IOCTL_TIOCINQ; i386_linux_record_tdep.ioctl_TIOCLINUX = I386_LINUX_RECORD_IOCTL_TIOCLINUX; i386_linux_record_tdep.ioctl_TIOCCONS = I386_LINUX_RECORD_IOCTL_TIOCCONS; i386_linux_record_tdep.ioctl_TIOCGSERIAL = I386_LINUX_RECORD_IOCTL_TIOCGSERIAL; i386_linux_record_tdep.ioctl_TIOCSSERIAL = I386_LINUX_RECORD_IOCTL_TIOCSSERIAL; i386_linux_record_tdep.ioctl_TIOCPKT = I386_LINUX_RECORD_IOCTL_TIOCPKT; i386_linux_record_tdep.ioctl_FIONBIO = I386_LINUX_RECORD_IOCTL_FIONBIO; i386_linux_record_tdep.ioctl_TIOCNOTTY = I386_LINUX_RECORD_IOCTL_TIOCNOTTY; i386_linux_record_tdep.ioctl_TIOCSETD = I386_LINUX_RECORD_IOCTL_TIOCSETD; i386_linux_record_tdep.ioctl_TIOCGETD = I386_LINUX_RECORD_IOCTL_TIOCGETD; i386_linux_record_tdep.ioctl_TCSBRKP = I386_LINUX_RECORD_IOCTL_TCSBRKP; i386_linux_record_tdep.ioctl_TIOCTTYGSTRUCT = I386_LINUX_RECORD_IOCTL_TIOCTTYGSTRUCT; i386_linux_record_tdep.ioctl_TIOCSBRK = I386_LINUX_RECORD_IOCTL_TIOCSBRK; i386_linux_record_tdep.ioctl_TIOCCBRK = I386_LINUX_RECORD_IOCTL_TIOCCBRK; i386_linux_record_tdep.ioctl_TIOCGSID = I386_LINUX_RECORD_IOCTL_TIOCGSID; i386_linux_record_tdep.ioctl_TCGETS2 = I386_LINUX_RECORD_IOCTL_TCGETS2; i386_linux_record_tdep.ioctl_TCSETS2 = I386_LINUX_RECORD_IOCTL_TCSETS2; i386_linux_record_tdep.ioctl_TCSETSW2 = I386_LINUX_RECORD_IOCTL_TCSETSW2; i386_linux_record_tdep.ioctl_TCSETSF2 = I386_LINUX_RECORD_IOCTL_TCSETSF2; i386_linux_record_tdep.ioctl_TIOCGPTN = I386_LINUX_RECORD_IOCTL_TIOCGPTN; i386_linux_record_tdep.ioctl_TIOCSPTLCK = I386_LINUX_RECORD_IOCTL_TIOCSPTLCK; i386_linux_record_tdep.ioctl_FIONCLEX = I386_LINUX_RECORD_IOCTL_FIONCLEX; i386_linux_record_tdep.ioctl_FIOCLEX = I386_LINUX_RECORD_IOCTL_FIOCLEX; i386_linux_record_tdep.ioctl_FIOASYNC = I386_LINUX_RECORD_IOCTL_FIOASYNC; i386_linux_record_tdep.ioctl_TIOCSERCONFIG = I386_LINUX_RECORD_IOCTL_TIOCSERCONFIG; i386_linux_record_tdep.ioctl_TIOCSERGWILD = I386_LINUX_RECORD_IOCTL_TIOCSERGWILD; i386_linux_record_tdep.ioctl_TIOCSERSWILD = I386_LINUX_RECORD_IOCTL_TIOCSERSWILD; i386_linux_record_tdep.ioctl_TIOCGLCKTRMIOS = I386_LINUX_RECORD_IOCTL_TIOCGLCKTRMIOS; i386_linux_record_tdep.ioctl_TIOCSLCKTRMIOS = I386_LINUX_RECORD_IOCTL_TIOCSLCKTRMIOS; i386_linux_record_tdep.ioctl_TIOCSERGSTRUCT = I386_LINUX_RECORD_IOCTL_TIOCSERGSTRUCT; i386_linux_record_tdep.ioctl_TIOCSERGETLSR = I386_LINUX_RECORD_IOCTL_TIOCSERGETLSR; i386_linux_record_tdep.ioctl_TIOCSERGETMULTI = I386_LINUX_RECORD_IOCTL_TIOCSERGETMULTI; i386_linux_record_tdep.ioctl_TIOCSERSETMULTI = I386_LINUX_RECORD_IOCTL_TIOCSERSETMULTI; i386_linux_record_tdep.ioctl_TIOCMIWAIT = I386_LINUX_RECORD_IOCTL_TIOCMIWAIT; i386_linux_record_tdep.ioctl_TIOCGICOUNT = I386_LINUX_RECORD_IOCTL_TIOCGICOUNT; i386_linux_record_tdep.ioctl_TIOCGHAYESESP = I386_LINUX_RECORD_IOCTL_TIOCGHAYESESP; i386_linux_record_tdep.ioctl_TIOCSHAYESESP = I386_LINUX_RECORD_IOCTL_TIOCSHAYESESP; i386_linux_record_tdep.ioctl_FIOQSIZE = I386_LINUX_RECORD_IOCTL_FIOQSIZE; i386_linux_record_tdep.arg1 = I386_EBX_REGNUM; i386_linux_record_tdep.arg2 = I386_ECX_REGNUM; i386_linux_record_tdep.arg3 = I386_EDX_REGNUM; i386_linux_record_tdep.arg4 = I386_ESI_REGNUM; i386_linux_record_tdep.arg5 = I386_EDI_REGNUM; tdep->i386_intx80_record = i386_linux_intx80_sysenter_record; tdep->i386_sysenter_record = i386_linux_intx80_sysenter_record; /* N_FUN symbols in shared libaries have 0 for their values and need to be relocated. */ set_gdbarch_sofun_address_maybe_missing (gdbarch, 1); /* GNU/Linux uses SVR4-style shared libraries. */ set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target); set_solib_svr4_fetch_link_map_offsets (gdbarch, svr4_ilp32_fetch_link_map_offsets); /* GNU/Linux uses the dynamic linker included in the GNU C Library. */ set_gdbarch_skip_solib_resolver (gdbarch, glibc_skip_solib_resolver); dwarf2_frame_set_signal_frame_p (gdbarch, i386_linux_dwarf_signal_frame_p); /* Enable TLS support. */ set_gdbarch_fetch_tls_load_module_address (gdbarch, svr4_fetch_objfile_link_map); /* Install supported register note sections. */ set_gdbarch_core_regset_sections (gdbarch, i386_linux_regset_sections); /* Displaced stepping. */ set_gdbarch_displaced_step_copy_insn (gdbarch, simple_displaced_step_copy_insn); set_gdbarch_displaced_step_fixup (gdbarch, i386_displaced_step_fixup); set_gdbarch_displaced_step_free_closure (gdbarch, simple_displaced_step_free_closure); set_gdbarch_displaced_step_location (gdbarch, displaced_step_at_entry_point); set_gdbarch_get_siginfo_type (gdbarch, linux_get_siginfo_type); } /* Provide a prototype to silence -Wmissing-prototypes. */ extern void _initialize_i386_linux_tdep (void); void _initialize_i386_linux_tdep (void) { gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_LINUX, i386_linux_init_abi); }