X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=gdb%2Farm-linux-tdep.c;h=b3ad8686e4852099bdcb4f508153b323a0eb5a45;hb=c6ef89f56b506f7279d98fad13360bce30c06022;hp=ac4860c3dbd1c58dbc6809d0fabaa0bce4176f4c;hpb=0b30217134add051e159a192066a1e568ebd837f;p=deliverable%2Fbinutils-gdb.git diff --git a/gdb/arm-linux-tdep.c b/gdb/arm-linux-tdep.c index ac4860c3db..b3ad8686e4 100644 --- a/gdb/arm-linux-tdep.c +++ b/gdb/arm-linux-tdep.c @@ -1,6 +1,6 @@ /* GNU/Linux on ARM target support. - Copyright (C) 1999-2012 Free Software Foundation, Inc. + Copyright (C) 1999-2015 Free Software Foundation, Inc. This file is part of GDB. @@ -33,6 +33,7 @@ #include "tramp-frame.h" #include "breakpoint.h" #include "auxv.h" +#include "xml-syscall.h" #include "arm-tdep.h" #include "arm-linux-tdep.h" @@ -40,14 +41,19 @@ #include "glibc-tdep.h" #include "arch-utils.h" #include "inferior.h" +#include "infrun.h" #include "gdbthread.h" #include "symfile.h" -#include "gdb_string.h" - -/* This is defined in on ARM GNU/Linux systems. */ -#define AT_HWCAP 16 +#include "record-full.h" +#include "linux-record.h" +#include "cli/cli-utils.h" +#include "stap-probe.h" +#include "parser-defs.h" +#include "user-regs.h" +#include +#include "elf/common.h" extern int arm_apcs_32; /* Under ARM GNU/Linux the traditional way of performing a breakpoint @@ -56,9 +62,9 @@ extern int arm_apcs_32; of the software interrupt the kernel stops the inferior with a SIGTRAP, and wakes the debugger. */ -static const char arm_linux_arm_le_breakpoint[] = { 0x01, 0x00, 0x9f, 0xef }; +static const gdb_byte arm_linux_arm_le_breakpoint[] = { 0x01, 0x00, 0x9f, 0xef }; -static const char arm_linux_arm_be_breakpoint[] = { 0xef, 0x9f, 0x00, 0x01 }; +static const gdb_byte arm_linux_arm_be_breakpoint[] = { 0xef, 0x9f, 0x00, 0x01 }; /* However, the EABI syscall interface (new in Nov. 2005) does not look at the operand of the swi if old-ABI compatibility is disabled. Therefore, @@ -66,24 +72,24 @@ static const char arm_linux_arm_be_breakpoint[] = { 0xef, 0x9f, 0x00, 0x01 }; version 2.5.70 (May 2003), so should be a safe assumption for EABI binaries. */ -static const char eabi_linux_arm_le_breakpoint[] = { 0xf0, 0x01, 0xf0, 0xe7 }; +static const gdb_byte eabi_linux_arm_le_breakpoint[] = { 0xf0, 0x01, 0xf0, 0xe7 }; -static const char eabi_linux_arm_be_breakpoint[] = { 0xe7, 0xf0, 0x01, 0xf0 }; +static const gdb_byte eabi_linux_arm_be_breakpoint[] = { 0xe7, 0xf0, 0x01, 0xf0 }; /* All the kernels which support Thumb support using a specific undefined instruction for the Thumb breakpoint. */ -static const char arm_linux_thumb_be_breakpoint[] = {0xde, 0x01}; +static const gdb_byte arm_linux_thumb_be_breakpoint[] = {0xde, 0x01}; -static const char arm_linux_thumb_le_breakpoint[] = {0x01, 0xde}; +static const gdb_byte arm_linux_thumb_le_breakpoint[] = {0x01, 0xde}; /* Because the 16-bit Thumb breakpoint is affected by Thumb-2 IT blocks, we must use a length-appropriate breakpoint for 32-bit Thumb instructions. See also thumb_get_next_pc. */ -static const char arm_linux_thumb2_be_breakpoint[] = { 0xf7, 0xf0, 0xa0, 0x00 }; +static const gdb_byte arm_linux_thumb2_be_breakpoint[] = { 0xf7, 0xf0, 0xa0, 0x00 }; -static const char arm_linux_thumb2_le_breakpoint[] = { 0xf0, 0xf7, 0x00, 0xa0 }; +static const gdb_byte arm_linux_thumb2_le_breakpoint[] = { 0xf0, 0xf7, 0x00, 0xa0 }; /* Description of the longjmp buffer. The buffer is treated as an array of elements of size ARM_LINUX_JB_ELEMENT_SIZE. @@ -238,6 +244,13 @@ static const char arm_linux_thumb2_le_breakpoint[] = { 0xf0, 0xf7, 0x00, 0xa0 }; #define ARM_SET_R7_RT_SIGRETURN 0xe3a070ad #define ARM_EABI_SYSCALL 0xef000000 +/* Equivalent patterns for Thumb2. */ +#define THUMB2_SET_R7_SIGRETURN1 0xf04f +#define THUMB2_SET_R7_SIGRETURN2 0x0777 +#define THUMB2_SET_R7_RT_SIGRETURN1 0xf04f +#define THUMB2_SET_R7_RT_SIGRETURN2 0x07ad +#define THUMB2_EABI_SYSCALL 0xdf00 + /* OABI syscall restart trampoline, used for EABI executables too whenever OABI support has been enabled in the kernel. */ #define ARM_OABI_SYSCALL_RESTART_SYSCALL 0xef900000 @@ -436,6 +449,30 @@ static struct tramp_frame arm_eabi_linux_rt_sigreturn_tramp_frame = { arm_linux_rt_sigreturn_init }; +static struct tramp_frame thumb2_eabi_linux_sigreturn_tramp_frame = { + SIGTRAMP_FRAME, + 2, + { + { THUMB2_SET_R7_SIGRETURN1, -1 }, + { THUMB2_SET_R7_SIGRETURN2, -1 }, + { THUMB2_EABI_SYSCALL, -1 }, + { TRAMP_SENTINEL_INSN } + }, + arm_linux_sigreturn_init +}; + +static struct tramp_frame thumb2_eabi_linux_rt_sigreturn_tramp_frame = { + SIGTRAMP_FRAME, + 2, + { + { THUMB2_SET_R7_RT_SIGRETURN1, -1 }, + { THUMB2_SET_R7_RT_SIGRETURN2, -1 }, + { THUMB2_EABI_SYSCALL, -1 }, + { TRAMP_SENTINEL_INSN } + }, + arm_linux_rt_sigreturn_init +}; + static struct tramp_frame arm_linux_restart_syscall_tramp_frame = { NORMAL_FRAME, 4, @@ -679,60 +716,40 @@ arm_linux_collect_vfp (const struct regset *regset, regs + (regno - ARM_D0_REGNUM) * 8); } -/* Return the appropriate register set for the core section identified - by SECT_NAME and SECT_SIZE. */ - -static const struct regset * -arm_linux_regset_from_core_section (struct gdbarch *gdbarch, - const char *sect_name, size_t sect_size) -{ - struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); - - if (strcmp (sect_name, ".reg") == 0 - && sect_size == ARM_LINUX_SIZEOF_GREGSET) - { - if (tdep->gregset == NULL) - tdep->gregset = regset_alloc (gdbarch, arm_linux_supply_gregset, - arm_linux_collect_gregset); - return tdep->gregset; - } - - if (strcmp (sect_name, ".reg2") == 0 - && sect_size == ARM_LINUX_SIZEOF_NWFPE) - { - if (tdep->fpregset == NULL) - tdep->fpregset = regset_alloc (gdbarch, arm_linux_supply_nwfpe, - arm_linux_collect_nwfpe); - return tdep->fpregset; - } +static const struct regset arm_linux_gregset = + { + NULL, arm_linux_supply_gregset, arm_linux_collect_gregset + }; - if (strcmp (sect_name, ".reg-arm-vfp") == 0 - && sect_size == ARM_LINUX_SIZEOF_VFP) - { - if (tdep->vfpregset == NULL) - tdep->vfpregset = regset_alloc (gdbarch, arm_linux_supply_vfp, - arm_linux_collect_vfp); - return tdep->vfpregset; - } +static const struct regset arm_linux_fpregset = + { + NULL, arm_linux_supply_nwfpe, arm_linux_collect_nwfpe + }; - return NULL; -} +static const struct regset arm_linux_vfpregset = + { + NULL, arm_linux_supply_vfp, arm_linux_collect_vfp + }; -/* Core file register set sections. */ +/* Iterate over core file register note sections. */ -static struct core_regset_section arm_linux_fpa_regset_sections[] = +static void +arm_linux_iterate_over_regset_sections (struct gdbarch *gdbarch, + iterate_over_regset_sections_cb *cb, + void *cb_data, + const struct regcache *regcache) { - { ".reg", ARM_LINUX_SIZEOF_GREGSET, "general-purpose" }, - { ".reg2", ARM_LINUX_SIZEOF_NWFPE, "FPA floating-point" }, - { NULL, 0} -}; + struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); -static struct core_regset_section arm_linux_vfp_regset_sections[] = -{ - { ".reg", ARM_LINUX_SIZEOF_GREGSET, "general-purpose" }, - { ".reg-arm-vfp", ARM_LINUX_SIZEOF_VFP, "VFP floating-point" }, - { NULL, 0} -}; + cb (".reg", ARM_LINUX_SIZEOF_GREGSET, &arm_linux_gregset, NULL, cb_data); + + if (tdep->vfp_register_count > 0) + cb (".reg-arm-vfp", ARM_LINUX_SIZEOF_VFP, &arm_linux_vfpregset, + "VFP floating-point", cb_data); + else if (tdep->have_fpa_registers) + cb (".reg2", ARM_LINUX_SIZEOF_NWFPE, &arm_linux_fpregset, + "FPA floating-point", cb_data); +} /* Determine target description from core file. */ @@ -788,6 +805,59 @@ arm_linux_sigreturn_return_addr (struct frame_info *frame, return 0; } +/* At a ptrace syscall-stop, return the syscall number. This either + comes from the SWI instruction (OABI) or from r7 (EABI). + + When the function fails, it should return -1. */ + +static LONGEST +arm_linux_get_syscall_number (struct gdbarch *gdbarch, + ptid_t ptid) +{ + struct regcache *regs = get_thread_regcache (ptid); + struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); + + ULONGEST pc; + ULONGEST cpsr; + ULONGEST t_bit = arm_psr_thumb_bit (gdbarch); + int is_thumb; + ULONGEST svc_number = -1; + + regcache_cooked_read_unsigned (regs, ARM_PC_REGNUM, &pc); + regcache_cooked_read_unsigned (regs, ARM_PS_REGNUM, &cpsr); + is_thumb = (cpsr & t_bit) != 0; + + if (is_thumb) + { + regcache_cooked_read_unsigned (regs, 7, &svc_number); + } + else + { + enum bfd_endian byte_order_for_code = + gdbarch_byte_order_for_code (gdbarch); + + /* PC gets incremented before the syscall-stop, so read the + previous instruction. */ + unsigned long this_instr = + read_memory_unsigned_integer (pc - 4, 4, byte_order_for_code); + + unsigned long svc_operand = (0x00ffffff & this_instr); + + if (svc_operand) + { + /* OABI */ + svc_number = svc_operand - 0x900000; + } + else + { + /* EABI */ + regcache_cooked_read_unsigned (regs, 7, &svc_number); + } + } + + return svc_number; +} + /* When FRAME is at a syscall instruction, return the PC of the next instruction to be executed. */ @@ -869,7 +939,6 @@ arm_linux_cleanup_svc (struct gdbarch *gdbarch, struct regcache *regs, struct displaced_step_closure *dsc) { - CORE_ADDR from = dsc->insn_addr; ULONGEST apparent_pc; int within_scratch; @@ -890,7 +959,8 @@ arm_linux_cleanup_svc (struct gdbarch *gdbarch, } if (within_scratch) - displaced_write_reg (regs, dsc, ARM_PC_REGNUM, from + 4, BRANCH_WRITE_PC); + displaced_write_reg (regs, dsc, ARM_PC_REGNUM, + dsc->insn_addr + dsc->insn_size, BRANCH_WRITE_PC); } static int @@ -910,51 +980,54 @@ arm_linux_copy_svc (struct gdbarch *gdbarch, struct regcache *regs, &return_to, &is_thumb); if (is_sigreturn) { - struct symtab_and_line sal; - - if (debug_displaced) - fprintf_unfiltered (gdb_stdlog, "displaced: found " - "sigreturn/rt_sigreturn SVC call. PC in frame = %lx\n", - (unsigned long) get_frame_pc (frame)); - - if (debug_displaced) - fprintf_unfiltered (gdb_stdlog, "displaced: unwind pc = %lx. " - "Setting momentary breakpoint.\n", (unsigned long) return_to); - - gdb_assert (inferior_thread ()->control.step_resume_breakpoint - == NULL); - - sal = find_pc_line (return_to, 0); - sal.pc = return_to; - sal.section = find_pc_overlay (return_to); - sal.explicit_pc = 1; - - frame = get_prev_frame (frame); - - if (frame) - { - inferior_thread ()->control.step_resume_breakpoint - = set_momentary_breakpoint (gdbarch, sal, get_frame_id (frame), - bp_step_resume); - - /* We need to make sure we actually insert the momentary - breakpoint set above. */ - insert_breakpoints (); - } - else if (debug_displaced) - fprintf_unfiltered (gdb_stderr, "displaced: couldn't find previous " - "frame to set momentary breakpoint for " - "sigreturn/rt_sigreturn\n"); + struct symtab_and_line sal; + + if (debug_displaced) + fprintf_unfiltered (gdb_stdlog, "displaced: found " + "sigreturn/rt_sigreturn SVC call. PC in " + "frame = %lx\n", + (unsigned long) get_frame_pc (frame)); + + if (debug_displaced) + fprintf_unfiltered (gdb_stdlog, "displaced: unwind pc = %lx. " + "Setting momentary breakpoint.\n", + (unsigned long) return_to); + + gdb_assert (inferior_thread ()->control.step_resume_breakpoint + == NULL); + + sal = find_pc_line (return_to, 0); + sal.pc = return_to; + sal.section = find_pc_overlay (return_to); + sal.explicit_pc = 1; + + frame = get_prev_frame (frame); + + if (frame) + { + inferior_thread ()->control.step_resume_breakpoint + = set_momentary_breakpoint (gdbarch, sal, get_frame_id (frame), + bp_step_resume); + + /* set_momentary_breakpoint invalidates FRAME. */ + frame = NULL; + + /* We need to make sure we actually insert the momentary + breakpoint set above. */ + insert_breakpoints (); } else if (debug_displaced) - fprintf_unfiltered (gdb_stdlog, "displaced: sigreturn/rt_sigreturn " - "SVC call not in signal trampoline frame\n"); - + fprintf_unfiltered (gdb_stderr, "displaced: couldn't find previous " + "frame to set momentary breakpoint for " + "sigreturn/rt_sigreturn\n"); + } + else if (debug_displaced) + fprintf_unfiltered (gdb_stdlog, "displaced: found SVC call\n"); /* Preparation: If we detect sigreturn, set momentary breakpoint at resume location, else nothing. Insn: unmodified svc. - Cleanup: if pc lands in scratch space, pc <- insn_addr + 4 + Cleanup: if pc lands in scratch space, pc <- insn_addr + insn_size else leave pc alone. */ @@ -1027,8 +1100,7 @@ arm_linux_displaced_step_copy_insn (struct gdbarch *gdbarch, CORE_ADDR from, CORE_ADDR to, struct regcache *regs) { - struct displaced_step_closure *dsc - = xmalloc (sizeof (struct displaced_step_closure)); + struct displaced_step_closure *dsc = XNEW (struct displaced_step_closure); /* Detect when we enter an (inaccessible by GDB) Linux kernel helper, and stop at the return location. */ @@ -1053,16 +1125,242 @@ arm_linux_displaced_step_copy_insn (struct gdbarch *gdbarch, return dsc; } +/* Implementation of `gdbarch_stap_is_single_operand', as defined in + gdbarch.h. */ + +static int +arm_stap_is_single_operand (struct gdbarch *gdbarch, const char *s) +{ + return (*s == '#' || *s == '$' || isdigit (*s) /* Literal number. */ + || *s == '[' /* Register indirection or + displacement. */ + || isalpha (*s)); /* Register value. */ +} + +/* This routine is used to parse a special token in ARM's assembly. + + The special tokens parsed by it are: + + - Register displacement (e.g, [fp, #-8]) + + It returns one if the special token has been parsed successfully, + or zero if the current token is not considered special. */ + +static int +arm_stap_parse_special_token (struct gdbarch *gdbarch, + struct stap_parse_info *p) +{ + if (*p->arg == '[') + { + /* Temporary holder for lookahead. */ + const char *tmp = p->arg; + char *endp; + /* Used to save the register name. */ + const char *start; + char *regname; + int len, offset; + int got_minus = 0; + long displacement; + struct stoken str; + + ++tmp; + start = tmp; + + /* Register name. */ + while (isalnum (*tmp)) + ++tmp; + + if (*tmp != ',') + return 0; + + len = tmp - start; + regname = alloca (len + 2); + + offset = 0; + if (isdigit (*start)) + { + /* If we are dealing with a register whose name begins with a + digit, it means we should prefix the name with the letter + `r', because GDB expects this name pattern. Otherwise (e.g., + we are dealing with the register `fp'), we don't need to + add such a prefix. */ + regname[0] = 'r'; + offset = 1; + } + + strncpy (regname + offset, start, len); + len += offset; + regname[len] = '\0'; + + if (user_reg_map_name_to_regnum (gdbarch, regname, len) == -1) + error (_("Invalid register name `%s' on expression `%s'."), + regname, p->saved_arg); + + ++tmp; + tmp = skip_spaces_const (tmp); + if (*tmp == '#' || *tmp == '$') + ++tmp; + + if (*tmp == '-') + { + ++tmp; + got_minus = 1; + } + + displacement = strtol (tmp, &endp, 10); + tmp = endp; + + /* Skipping last `]'. */ + if (*tmp++ != ']') + return 0; + + /* The displacement. */ + write_exp_elt_opcode (&p->pstate, OP_LONG); + write_exp_elt_type (&p->pstate, builtin_type (gdbarch)->builtin_long); + write_exp_elt_longcst (&p->pstate, displacement); + write_exp_elt_opcode (&p->pstate, OP_LONG); + if (got_minus) + write_exp_elt_opcode (&p->pstate, UNOP_NEG); + + /* The register name. */ + write_exp_elt_opcode (&p->pstate, OP_REGISTER); + str.ptr = regname; + str.length = len; + write_exp_string (&p->pstate, str); + write_exp_elt_opcode (&p->pstate, OP_REGISTER); + + write_exp_elt_opcode (&p->pstate, BINOP_ADD); + + /* Casting to the expected type. */ + write_exp_elt_opcode (&p->pstate, UNOP_CAST); + write_exp_elt_type (&p->pstate, lookup_pointer_type (p->arg_type)); + write_exp_elt_opcode (&p->pstate, UNOP_CAST); + + write_exp_elt_opcode (&p->pstate, UNOP_IND); + + p->arg = tmp; + } + else + return 0; + + return 1; +} + +/* ARM process record-replay constructs: syscall, signal etc. */ + +struct linux_record_tdep arm_linux_record_tdep; + +/* arm_canonicalize_syscall maps from the native arm Linux set + of syscall ids into a canonical set of syscall ids used by + process record. */ + +static enum gdb_syscall +arm_canonicalize_syscall (int syscall) +{ + enum { sys_process_vm_writev = 377 }; + + if (syscall <= gdb_sys_sched_getaffinity) + return syscall; + else if (syscall >= 243 && syscall <= 247) + return syscall + 2; + else if (syscall >= 248 && syscall <= 253) + return syscall + 4; + + return gdb_sys_no_syscall; +} + +/* Record all registers but PC register for process-record. */ + +static int +arm_all_but_pc_registers_record (struct regcache *regcache) +{ + int i; + + for (i = 0; i < ARM_PC_REGNUM; i++) + { + if (record_full_arch_list_add_reg (regcache, ARM_A1_REGNUM + i)) + return -1; + } + + if (record_full_arch_list_add_reg (regcache, ARM_PS_REGNUM)) + return -1; + + return 0; +} + +/* Handler for arm system call instruction recording. */ + +static int +arm_linux_syscall_record (struct regcache *regcache, unsigned long svc_number) +{ + int ret = 0; + enum gdb_syscall syscall_gdb; + + syscall_gdb = arm_canonicalize_syscall (svc_number); + + if (syscall_gdb == gdb_sys_no_syscall) + { + printf_unfiltered (_("Process record and replay target doesn't " + "support syscall number %s\n"), + plongest (svc_number)); + return -1; + } + + if (syscall_gdb == gdb_sys_sigreturn + || syscall_gdb == gdb_sys_rt_sigreturn) + { + if (arm_all_but_pc_registers_record (regcache)) + return -1; + return 0; + } + + ret = record_linux_system_call (syscall_gdb, regcache, + &arm_linux_record_tdep); + if (ret != 0) + return ret; + + /* Record the return value of the system call. */ + if (record_full_arch_list_add_reg (regcache, ARM_A1_REGNUM)) + return -1; + /* Record LR. */ + if (record_full_arch_list_add_reg (regcache, ARM_LR_REGNUM)) + return -1; + /* Record CPSR. */ + if (record_full_arch_list_add_reg (regcache, ARM_PS_REGNUM)) + return -1; + + return 0; +} + +/* Implement the skip_trampoline_code gdbarch method. */ + +static CORE_ADDR +arm_linux_skip_trampoline_code (struct frame_info *frame, CORE_ADDR pc) +{ + CORE_ADDR target_pc = arm_skip_stub (frame, pc); + + if (target_pc != 0) + return target_pc; + + return find_solib_trampoline_target (frame, pc); +} + static void arm_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) { + static const char *const stap_integer_prefixes[] = { "#", "$", "", NULL }; + static const char *const stap_register_prefixes[] = { "r", NULL }; + static const char *const stap_register_indirection_prefixes[] = { "[", + NULL }; + static const char *const stap_register_indirection_suffixes[] = { "]", + NULL }; struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); linux_init_abi (info, gdbarch); tdep->lowest_pc = 0x8000; - if (info.byte_order == BFD_ENDIAN_BIG) + if (info.byte_order_for_code == BFD_ENDIAN_BIG) { if (tdep->arm_abi == ARM_ABI_AAPCS) tdep->arm_breakpoint = eabi_linux_arm_be_breakpoint; @@ -1112,7 +1410,7 @@ arm_linux_init_abi (struct gdbarch_info info, set_gdbarch_software_single_step (gdbarch, arm_linux_software_single_step); /* Shared library handling. */ - set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target); + set_gdbarch_skip_trampoline_code (gdbarch, arm_linux_skip_trampoline_code); set_gdbarch_skip_solib_resolver (gdbarch, glibc_skip_solib_resolver); /* Enable TLS support. */ @@ -1127,33 +1425,208 @@ arm_linux_init_abi (struct gdbarch_info info, &arm_eabi_linux_sigreturn_tramp_frame); tramp_frame_prepend_unwinder (gdbarch, &arm_eabi_linux_rt_sigreturn_tramp_frame); + tramp_frame_prepend_unwinder (gdbarch, + &thumb2_eabi_linux_sigreturn_tramp_frame); + tramp_frame_prepend_unwinder (gdbarch, + &thumb2_eabi_linux_rt_sigreturn_tramp_frame); tramp_frame_prepend_unwinder (gdbarch, &arm_linux_restart_syscall_tramp_frame); tramp_frame_prepend_unwinder (gdbarch, &arm_kernel_linux_restart_syscall_tramp_frame); /* Core file support. */ - set_gdbarch_regset_from_core_section (gdbarch, - arm_linux_regset_from_core_section); + set_gdbarch_iterate_over_regset_sections + (gdbarch, arm_linux_iterate_over_regset_sections); set_gdbarch_core_read_description (gdbarch, arm_linux_core_read_description); - if (tdep->have_vfp_registers) - set_gdbarch_core_regset_sections (gdbarch, arm_linux_vfp_regset_sections); - else if (tdep->have_fpa_registers) - set_gdbarch_core_regset_sections (gdbarch, arm_linux_fpa_regset_sections); - - set_gdbarch_get_siginfo_type (gdbarch, linux_get_siginfo_type); - /* Displaced stepping. */ set_gdbarch_displaced_step_copy_insn (gdbarch, arm_linux_displaced_step_copy_insn); set_gdbarch_displaced_step_fixup (gdbarch, arm_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_displaced_step_location (gdbarch, linux_displaced_step_location); + + /* Reversible debugging, process record. */ + set_gdbarch_process_record (gdbarch, arm_process_record); + + /* SystemTap functions. */ + set_gdbarch_stap_integer_prefixes (gdbarch, stap_integer_prefixes); + set_gdbarch_stap_register_prefixes (gdbarch, stap_register_prefixes); + set_gdbarch_stap_register_indirection_prefixes (gdbarch, + stap_register_indirection_prefixes); + set_gdbarch_stap_register_indirection_suffixes (gdbarch, + stap_register_indirection_suffixes); + set_gdbarch_stap_gdb_register_prefix (gdbarch, "r"); + set_gdbarch_stap_is_single_operand (gdbarch, arm_stap_is_single_operand); + set_gdbarch_stap_parse_special_token (gdbarch, + arm_stap_parse_special_token); tdep->syscall_next_pc = arm_linux_syscall_next_pc; + + /* `catch syscall' */ + set_xml_syscall_file_name (gdbarch, "syscalls/arm-linux.xml"); + set_gdbarch_get_syscall_number (gdbarch, arm_linux_get_syscall_number); + + /* Syscall record. */ + tdep->arm_syscall_record = arm_linux_syscall_record; + + /* Initialize the arm_linux_record_tdep. */ + /* These values are the size of the type that will be used in a system + call. They are obtained from Linux Kernel source. */ + arm_linux_record_tdep.size_pointer + = gdbarch_ptr_bit (gdbarch) / TARGET_CHAR_BIT; + arm_linux_record_tdep.size__old_kernel_stat = 32; + arm_linux_record_tdep.size_tms = 16; + arm_linux_record_tdep.size_loff_t = 8; + arm_linux_record_tdep.size_flock = 16; + arm_linux_record_tdep.size_oldold_utsname = 45; + arm_linux_record_tdep.size_ustat = 20; + arm_linux_record_tdep.size_old_sigaction = 140; + arm_linux_record_tdep.size_old_sigset_t = 128; + arm_linux_record_tdep.size_rlimit = 8; + arm_linux_record_tdep.size_rusage = 72; + arm_linux_record_tdep.size_timeval = 8; + arm_linux_record_tdep.size_timezone = 8; + arm_linux_record_tdep.size_old_gid_t = 2; + arm_linux_record_tdep.size_old_uid_t = 2; + arm_linux_record_tdep.size_fd_set = 128; + arm_linux_record_tdep.size_dirent = 268; + arm_linux_record_tdep.size_dirent64 = 276; + arm_linux_record_tdep.size_statfs = 64; + arm_linux_record_tdep.size_statfs64 = 84; + arm_linux_record_tdep.size_sockaddr = 16; + arm_linux_record_tdep.size_int + = gdbarch_int_bit (gdbarch) / TARGET_CHAR_BIT; + arm_linux_record_tdep.size_long + = gdbarch_long_bit (gdbarch) / TARGET_CHAR_BIT; + arm_linux_record_tdep.size_ulong + = gdbarch_long_bit (gdbarch) / TARGET_CHAR_BIT; + arm_linux_record_tdep.size_msghdr = 28; + arm_linux_record_tdep.size_itimerval = 16; + arm_linux_record_tdep.size_stat = 88; + arm_linux_record_tdep.size_old_utsname = 325; + arm_linux_record_tdep.size_sysinfo = 64; + arm_linux_record_tdep.size_msqid_ds = 88; + arm_linux_record_tdep.size_shmid_ds = 84; + arm_linux_record_tdep.size_new_utsname = 390; + arm_linux_record_tdep.size_timex = 128; + arm_linux_record_tdep.size_mem_dqinfo = 24; + arm_linux_record_tdep.size_if_dqblk = 68; + arm_linux_record_tdep.size_fs_quota_stat = 68; + arm_linux_record_tdep.size_timespec = 8; + arm_linux_record_tdep.size_pollfd = 8; + arm_linux_record_tdep.size_NFS_FHSIZE = 32; + arm_linux_record_tdep.size_knfsd_fh = 132; + arm_linux_record_tdep.size_TASK_COMM_LEN = 16; + arm_linux_record_tdep.size_sigaction = 140; + arm_linux_record_tdep.size_sigset_t = 8; + arm_linux_record_tdep.size_siginfo_t = 128; + arm_linux_record_tdep.size_cap_user_data_t = 12; + arm_linux_record_tdep.size_stack_t = 12; + arm_linux_record_tdep.size_off_t = arm_linux_record_tdep.size_long; + arm_linux_record_tdep.size_stat64 = 96; + arm_linux_record_tdep.size_gid_t = 2; + arm_linux_record_tdep.size_uid_t = 2; + arm_linux_record_tdep.size_PAGE_SIZE = 4096; + arm_linux_record_tdep.size_flock64 = 24; + arm_linux_record_tdep.size_user_desc = 16; + arm_linux_record_tdep.size_io_event = 32; + arm_linux_record_tdep.size_iocb = 64; + arm_linux_record_tdep.size_epoll_event = 12; + arm_linux_record_tdep.size_itimerspec + = arm_linux_record_tdep.size_timespec * 2; + arm_linux_record_tdep.size_mq_attr = 32; + arm_linux_record_tdep.size_siginfo = 128; + arm_linux_record_tdep.size_termios = 36; + arm_linux_record_tdep.size_termios2 = 44; + arm_linux_record_tdep.size_pid_t = 4; + arm_linux_record_tdep.size_winsize = 8; + arm_linux_record_tdep.size_serial_struct = 60; + arm_linux_record_tdep.size_serial_icounter_struct = 80; + arm_linux_record_tdep.size_hayes_esp_config = 12; + arm_linux_record_tdep.size_size_t = 4; + arm_linux_record_tdep.size_iovec = 8; + + /* These values are the second argument of system call "sys_ioctl". + They are obtained from Linux Kernel source. */ + arm_linux_record_tdep.ioctl_TCGETS = 0x5401; + arm_linux_record_tdep.ioctl_TCSETS = 0x5402; + arm_linux_record_tdep.ioctl_TCSETSW = 0x5403; + arm_linux_record_tdep.ioctl_TCSETSF = 0x5404; + arm_linux_record_tdep.ioctl_TCGETA = 0x5405; + arm_linux_record_tdep.ioctl_TCSETA = 0x5406; + arm_linux_record_tdep.ioctl_TCSETAW = 0x5407; + arm_linux_record_tdep.ioctl_TCSETAF = 0x5408; + arm_linux_record_tdep.ioctl_TCSBRK = 0x5409; + arm_linux_record_tdep.ioctl_TCXONC = 0x540a; + arm_linux_record_tdep.ioctl_TCFLSH = 0x540b; + arm_linux_record_tdep.ioctl_TIOCEXCL = 0x540c; + arm_linux_record_tdep.ioctl_TIOCNXCL = 0x540d; + arm_linux_record_tdep.ioctl_TIOCSCTTY = 0x540e; + arm_linux_record_tdep.ioctl_TIOCGPGRP = 0x540f; + arm_linux_record_tdep.ioctl_TIOCSPGRP = 0x5410; + arm_linux_record_tdep.ioctl_TIOCOUTQ = 0x5411; + arm_linux_record_tdep.ioctl_TIOCSTI = 0x5412; + arm_linux_record_tdep.ioctl_TIOCGWINSZ = 0x5413; + arm_linux_record_tdep.ioctl_TIOCSWINSZ = 0x5414; + arm_linux_record_tdep.ioctl_TIOCMGET = 0x5415; + arm_linux_record_tdep.ioctl_TIOCMBIS = 0x5416; + arm_linux_record_tdep.ioctl_TIOCMBIC = 0x5417; + arm_linux_record_tdep.ioctl_TIOCMSET = 0x5418; + arm_linux_record_tdep.ioctl_TIOCGSOFTCAR = 0x5419; + arm_linux_record_tdep.ioctl_TIOCSSOFTCAR = 0x541a; + arm_linux_record_tdep.ioctl_FIONREAD = 0x541b; + arm_linux_record_tdep.ioctl_TIOCINQ = arm_linux_record_tdep.ioctl_FIONREAD; + arm_linux_record_tdep.ioctl_TIOCLINUX = 0x541c; + arm_linux_record_tdep.ioctl_TIOCCONS = 0x541d; + arm_linux_record_tdep.ioctl_TIOCGSERIAL = 0x541e; + arm_linux_record_tdep.ioctl_TIOCSSERIAL = 0x541f; + arm_linux_record_tdep.ioctl_TIOCPKT = 0x5420; + arm_linux_record_tdep.ioctl_FIONBIO = 0x5421; + arm_linux_record_tdep.ioctl_TIOCNOTTY = 0x5422; + arm_linux_record_tdep.ioctl_TIOCSETD = 0x5423; + arm_linux_record_tdep.ioctl_TIOCGETD = 0x5424; + arm_linux_record_tdep.ioctl_TCSBRKP = 0x5425; + arm_linux_record_tdep.ioctl_TIOCTTYGSTRUCT = 0x5426; + arm_linux_record_tdep.ioctl_TIOCSBRK = 0x5427; + arm_linux_record_tdep.ioctl_TIOCCBRK = 0x5428; + arm_linux_record_tdep.ioctl_TIOCGSID = 0x5429; + arm_linux_record_tdep.ioctl_TCGETS2 = 0x802c542a; + arm_linux_record_tdep.ioctl_TCSETS2 = 0x402c542b; + arm_linux_record_tdep.ioctl_TCSETSW2 = 0x402c542c; + arm_linux_record_tdep.ioctl_TCSETSF2 = 0x402c542d; + arm_linux_record_tdep.ioctl_TIOCGPTN = 0x80045430; + arm_linux_record_tdep.ioctl_TIOCSPTLCK = 0x40045431; + arm_linux_record_tdep.ioctl_FIONCLEX = 0x5450; + arm_linux_record_tdep.ioctl_FIOCLEX = 0x5451; + arm_linux_record_tdep.ioctl_FIOASYNC = 0x5452; + arm_linux_record_tdep.ioctl_TIOCSERCONFIG = 0x5453; + arm_linux_record_tdep.ioctl_TIOCSERGWILD = 0x5454; + arm_linux_record_tdep.ioctl_TIOCSERSWILD = 0x5455; + arm_linux_record_tdep.ioctl_TIOCGLCKTRMIOS = 0x5456; + arm_linux_record_tdep.ioctl_TIOCSLCKTRMIOS = 0x5457; + arm_linux_record_tdep.ioctl_TIOCSERGSTRUCT = 0x5458; + arm_linux_record_tdep.ioctl_TIOCSERGETLSR = 0x5459; + arm_linux_record_tdep.ioctl_TIOCSERGETMULTI = 0x545a; + arm_linux_record_tdep.ioctl_TIOCSERSETMULTI = 0x545b; + arm_linux_record_tdep.ioctl_TIOCMIWAIT = 0x545c; + arm_linux_record_tdep.ioctl_TIOCGICOUNT = 0x545d; + arm_linux_record_tdep.ioctl_TIOCGHAYESESP = 0x545e; + arm_linux_record_tdep.ioctl_TIOCSHAYESESP = 0x545f; + arm_linux_record_tdep.ioctl_FIOQSIZE = 0x5460; + + /* These values are the second argument of system call "sys_fcntl" + and "sys_fcntl64". They are obtained from Linux Kernel source. */ + arm_linux_record_tdep.fcntl_F_GETLK = 5; + arm_linux_record_tdep.fcntl_F_GETLK64 = 12; + arm_linux_record_tdep.fcntl_F_SETLK64 = 13; + arm_linux_record_tdep.fcntl_F_SETLKW64 = 14; + + arm_linux_record_tdep.arg1 = ARM_A1_REGNUM + 1; + arm_linux_record_tdep.arg2 = ARM_A1_REGNUM + 2; + arm_linux_record_tdep.arg3 = ARM_A1_REGNUM + 3; + arm_linux_record_tdep.arg4 = ARM_A1_REGNUM + 3; } /* Provide a prototype to silence -Wmissing-prototypes. */