diff options
Diffstat (limited to 'gdb/i386-linux-tdep.c')
| -rw-r--r-- | gdb/i386-linux-tdep.c | 271 |
1 files changed, 127 insertions, 144 deletions
diff --git a/gdb/i386-linux-tdep.c b/gdb/i386-linux-tdep.c index ad0377d..1963c8a 100644 --- a/gdb/i386-linux-tdep.c +++ b/gdb/i386-linux-tdep.c @@ -57,13 +57,11 @@ i386_linux_register_reggroup_p (struct gdbarch *gdbarch, int regnum, const struct reggroup *group) { if (regnum == I386_LINUX_ORIG_EAX_REGNUM) - return (group == system_reggroup - || group == save_reggroup + 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 @@ -102,18 +100,17 @@ i386_linux_register_reggroup_p (struct gdbarch *gdbarch, int regnum, 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_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) @@ -173,15 +170,14 @@ i386_linux_sigtramp_start (frame_info_ptr this_frame) 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 +#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 */ +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 $0x80 */ }; #define LINUX_RT_SIGTRAMP_LEN (sizeof linux_rt_sigtramp_code) @@ -212,8 +208,7 @@ i386_linux_rt_sigtramp_start (frame_info_ptr this_frame) pc -= LINUX_RT_SIGTRAMP_OFFSET1; - if (!safe_frame_unwind_memory (this_frame, pc, - buf)) + if (!safe_frame_unwind_memory (this_frame, pc, buf)) return 0; } @@ -261,8 +256,9 @@ i386_linux_dwarf_signal_frame_p (struct gdbarch *gdbarch, /* If a vsyscall DSO is in use, the signal trampolines may have these names. */ - if (name && (strcmp (name, "__kernel_sigreturn") == 0 - || strcmp (name, "__kernel_rt_sigreturn") == 0)) + if (name + && (strcmp (name, "__kernel_sigreturn") == 0 + || strcmp (name, "__kernel_rt_sigreturn") == 0)) return 1; return 0; @@ -313,7 +309,7 @@ i386_linux_sigcontext_addr (frame_info_ptr this_frame) return ucontext_addr + I386_LINUX_UCONTEXT_SIGCONTEXT_OFFSET; } - error (_("Couldn't recognize signal trampoline.")); + error (_ ("Couldn't recognize signal trampoline.")); return 0; } @@ -376,7 +372,10 @@ i386_all_but_ip_registers_record (struct regcache *regcache) static enum gdb_syscall i386_canonicalize_syscall (int syscall) { - enum { i386_syscall_max = 499 }; + enum + { + i386_syscall_max = 499 + }; if (syscall <= i386_syscall_max) return (enum gdb_syscall) syscall; @@ -408,12 +407,11 @@ i386_linux_report_signal_info (struct gdbarch *gdbarch, struct ui_out *uiout, /* Sigcode evaluates if the actual segfault is a boundary violation. */ sig_code = parse_and_eval_long ("$_siginfo.si_code\n"); - lower_bound - = parse_and_eval_long ("$_siginfo._sifields._sigfault._addr_bnd._lower"); - upper_bound - = parse_and_eval_long ("$_siginfo._sifields._sigfault._addr_bnd._upper"); - access - = parse_and_eval_long ("$_siginfo._sifields._sigfault.si_addr"); + lower_bound = parse_and_eval_long ( + "$_siginfo._sifields._sigfault._addr_bnd._lower"); + upper_bound = parse_and_eval_long ( + "$_siginfo._sifields._sigfault._addr_bnd._upper"); + access = parse_and_eval_long ("$_siginfo._sifields._sigfault.si_addr"); } catch (const gdb_exception &exception) { @@ -428,20 +426,20 @@ i386_linux_report_signal_info (struct gdbarch *gdbarch, struct ui_out *uiout, uiout->text ("\n"); if (is_upper) - uiout->field_string ("sigcode-meaning", _("Upper bound violation")); + uiout->field_string ("sigcode-meaning", _ ("Upper bound violation")); else - uiout->field_string ("sigcode-meaning", _("Lower bound violation")); + uiout->field_string ("sigcode-meaning", _ ("Lower bound violation")); - uiout->text (_(" while accessing address ")); + uiout->text (_ (" while accessing address ")); uiout->field_core_addr ("bound-access", gdbarch, access); - uiout->text (_("\nBounds: [lower = ")); + uiout->text (_ ("\nBounds: [lower = ")); uiout->field_core_addr ("lower-bound", gdbarch, lower_bound); - uiout->text (_(", upper = ")); + uiout->text (_ (", upper = ")); uiout->field_core_addr ("upper-bound", gdbarch, upper_bound); - uiout->text (_("]")); + uiout->text (_ ("]")); } /* Parse the arguments of current system call instruction and record @@ -467,19 +465,18 @@ i386_linux_intx80_sysenter_syscall_record (struct regcache *regcache) if (syscall_gdb < 0) { gdb_printf (gdb_stderr, - _("Process record and replay target doesn't " - "support syscall number %s\n"), + _ ("Process record and replay target doesn't " + "support syscall number %s\n"), plongest (syscall_native)); return -1; } - if (syscall_gdb == gdb_sys_sigreturn - || syscall_gdb == gdb_sys_rt_sigreturn) - { - if (i386_all_but_ip_registers_record (regcache)) - return -1; - return 0; - } + if (syscall_gdb == gdb_sys_sigreturn || syscall_gdb == gdb_sys_rt_sigreturn) + { + if (i386_all_but_ip_registers_record (regcache)) + return -1; + return 0; + } ret = record_linux_system_call (syscall_gdb, regcache, &i386_linux_record_tdep); @@ -493,12 +490,11 @@ i386_linux_intx80_sysenter_syscall_record (struct regcache *regcache) return 0; } -#define I386_LINUX_xstate 270 -#define I386_LINUX_frame_size 732 +#define I386_LINUX_xstate 270 +#define I386_LINUX_frame_size 732 static int -i386_linux_record_signal (struct gdbarch *gdbarch, - struct regcache *regcache, +i386_linux_record_signal (struct gdbarch *gdbarch, struct regcache *regcache, enum gdb_signal signal) { ULONGEST esp; @@ -517,8 +513,8 @@ i386_linux_record_signal (struct gdbarch *gdbarch, /* This is for frame_size. sp -= sizeof (struct rt_sigframe); */ esp -= I386_LINUX_frame_size; - if (record_full_arch_list_add_mem (esp, - I386_LINUX_xstate + I386_LINUX_frame_size)) + if (record_full_arch_list_add_mem (esp, I386_LINUX_xstate + + I386_LINUX_frame_size)) return -1; if (record_full_arch_list_add_end ()) @@ -526,7 +522,6 @@ i386_linux_record_signal (struct gdbarch *gdbarch, return 0; } - /* Core of the implementation for gdbarch get_syscall_number. Get pending syscall number from REGCACHE. If there is no pending syscall -1 will be @@ -559,8 +554,7 @@ i386_linux_get_syscall_number_from_regcache (struct regcache *regcache) compatible with gdbarch get_syscall_number method prototype. */ static LONGEST -i386_linux_get_syscall_number (struct gdbarch *gdbarch, - thread_info *thread) +i386_linux_get_syscall_number (struct gdbarch *gdbarch, thread_info *thread) { struct regcache *regcache = get_thread_regcache (thread); @@ -583,59 +577,54 @@ i386_linux_get_syscall_number (struct gdbarch *gdbarch, format and GDB's register cache layout. */ /* From <sys/reg.h>. */ -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, - -1, -1, -1, -1, -1, -1, -1, -1, - -1, -1, -1, -1, /* MPX registers BND0 ... BND3. */ - -1, -1, /* MPX registers BNDCFGU, BNDSTATUS. */ - -1, -1, -1, -1, -1, -1, -1, -1, /* k0 ... k7 (AVX512) */ - -1, -1, -1, -1, -1, -1, -1, -1, /* zmm0 ... zmm7 (AVX512) */ - -1, /* PKRU register */ - 11 * 4, /* "orig_eax" */ +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, -1, + -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* MPX registers BND0 ... BND3. */ + -1, -1, /* MPX registers BNDCFGU, BNDSTATUS. */ + -1, -1, -1, -1, -1, -1, -1, -1, /* k0 ... k7 (AVX512) */ + -1, -1, -1, -1, -1, -1, -1, -1, /* zmm0 ... zmm7 (AVX512) */ + -1, /* PKRU register */ + 11 * 4, /* "orig_eax" */ }; /* Mapping between the general-purpose registers in `struct sigcontext' format and GDB's register cache layout. */ /* From <asm/sigcontext.h>. */ -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 */ +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 */ }; /* Get XSAVE extended state xcr0 from core dump. */ @@ -657,12 +646,11 @@ i386_linux_core_read_xcr0 (bfd *abfd) { char contents[8]; - if (! bfd_get_section_contents (abfd, xstate, contents, - I386_LINUX_XSAVE_XCR0_OFFSET, - 8)) + if (!bfd_get_section_contents (abfd, xstate, contents, + I386_LINUX_XSAVE_XCR0_OFFSET, 8)) { - warning (_("Couldn't read `xcr0' bytes from " - "`.reg-xstate' section in core file.")); + warning (_ ("Couldn't read `xcr0' bytes from " + "`.reg-xstate' section in core file.")); return 0; } @@ -683,16 +671,17 @@ i386_linux_read_description (uint64_t xcr0) if (xcr0 == 0) return NULL; - static struct target_desc *i386_linux_tdescs \ - [2/*X87*/][2/*SSE*/][2/*AVX*/][2/*MPX*/][2/*AVX512*/][2/*PKRU*/] = {}; + static struct target_desc + *i386_linux_tdescs[2 /*X87*/][2 /*SSE*/][2 /*AVX*/][2 /*MPX*/] + [2 /*AVX512*/][2 /*PKRU*/] + = {}; struct target_desc **tdesc; - tdesc = &i386_linux_tdescs[(xcr0 & X86_XSTATE_X87) ? 1 : 0] - [(xcr0 & X86_XSTATE_SSE) ? 1 : 0] - [(xcr0 & X86_XSTATE_AVX) ? 1 : 0] - [(xcr0 & X86_XSTATE_MPX) ? 1 : 0] - [(xcr0 & X86_XSTATE_AVX512) ? 1 : 0] - [(xcr0 & X86_XSTATE_PKRU) ? 1 : 0]; + tdesc + = &i386_linux_tdescs + [(xcr0 & X86_XSTATE_X87) ? 1 : 0][(xcr0 & X86_XSTATE_SSE) ? 1 : 0] + [(xcr0 & X86_XSTATE_AVX) ? 1 : 0][(xcr0 & X86_XSTATE_MPX) ? 1 : 0] + [(xcr0 & X86_XSTATE_AVX512) ? 1 : 0][(xcr0 & X86_XSTATE_PKRU) ? 1 : 0]; if (*tdesc == NULL) *tdesc = i386_create_target_description (xcr0, true, false); @@ -704,8 +693,7 @@ i386_linux_read_description (uint64_t xcr0) static const struct target_desc * i386_linux_core_read_description (struct gdbarch *gdbarch, - struct target_ops *target, - bfd *abfd) + struct target_ops *target, bfd *abfd) { /* Linux/i386. */ uint64_t xcr0 = i386_linux_core_read_xcr0 (abfd); @@ -733,27 +721,24 @@ i386_linux_supply_xstateregset (const struct regset *regset, struct type * x86_linux_get_siginfo_type (struct gdbarch *gdbarch) { - return linux_get_siginfo_type_with_fields (gdbarch, LINUX_SIGINFO_FIELD_ADDR_BND); + return linux_get_siginfo_type_with_fields (gdbarch, + LINUX_SIGINFO_FIELD_ADDR_BND); } /* Similar to i386_collect_fpregset, but use XSAVE extended state. */ static void i386_linux_collect_xstateregset (const struct regset *regset, - const struct regcache *regcache, - int regnum, void *xstateregs, size_t len) + const struct regcache *regcache, int regnum, + void *xstateregs, size_t len) { i387_collect_xsave (regcache, regnum, xstateregs, 1); } /* Register set definitions. */ -static const struct regset i386_linux_xstateregset = - { - NULL, - i386_linux_supply_xstateregset, - i386_linux_collect_xstateregset - }; +static const struct regset i386_linux_xstateregset + = { NULL, i386_linux_supply_xstateregset, i386_linux_collect_xstateregset }; /* Iterate over core file register note sections. */ @@ -801,12 +786,11 @@ i386_linux_iterate_over_regset_sections (struct gdbarch *gdbarch, there instead. */ static displaced_step_copy_insn_closure_up -i386_linux_displaced_step_copy_insn (struct gdbarch *gdbarch, - CORE_ADDR from, CORE_ADDR to, - struct regcache *regs) +i386_linux_displaced_step_copy_insn (struct gdbarch *gdbarch, CORE_ADDR from, + CORE_ADDR to, struct regcache *regs) { displaced_step_copy_insn_closure_up closure_ - = i386_displaced_step_copy_insn (gdbarch, from, to, regs); + = i386_displaced_step_copy_insn (gdbarch, from, to, regs); if (i386_linux_get_syscall_number_from_regcache (regs) != -1) { @@ -841,7 +825,7 @@ i386_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) /* Reserve a number for orig_eax. */ set_gdbarch_num_regs (gdbarch, I386_LINUX_NUM_REGS); - if (! tdesc_has_registers (tdesc)) + if (!tdesc_has_registers (tdesc)) tdesc = i386_linux_read_description (X86_XSTATE_SSE_MASK); tdep->tdesc = tdesc; @@ -850,8 +834,7 @@ i386_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) return; valid_p = tdesc_numbered_register (feature, tdesc_data, - I386_LINUX_ORIG_EAX_REGNUM, - "orig_eax"); + I386_LINUX_ORIG_EAX_REGNUM, "orig_eax"); if (!valid_p) return; @@ -864,7 +847,7 @@ i386_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) tdep->gregset_num_regs = ARRAY_SIZE (i386_linux_gregset_reg_offset); tdep->sizeof_gregset = 17 * 4; - tdep->jb_pc_offset = 20; /* From <bits/setjmp.h>. */ + tdep->jb_pc_offset = 20; /* From <bits/setjmp.h>. */ tdep->sigtramp_p = i386_linux_sigtramp_p; tdep->sigcontext_addr = i386_linux_sigcontext_addr; @@ -1044,8 +1027,8 @@ i386_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) /* 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, linux_ilp32_fetch_link_map_offsets); + set_solib_svr4_fetch_link_map_offsets (gdbarch, + linux_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); @@ -1057,8 +1040,8 @@ i386_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) svr4_fetch_objfile_link_map); /* Core file support. */ - set_gdbarch_iterate_over_regset_sections - (gdbarch, i386_linux_iterate_over_regset_sections); + set_gdbarch_iterate_over_regset_sections ( + gdbarch, i386_linux_iterate_over_regset_sections); set_gdbarch_core_read_description (gdbarch, i386_linux_core_read_description); @@ -1069,14 +1052,14 @@ i386_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) /* Functions for 'catch syscall'. */ set_xml_syscall_file_name (gdbarch, XML_SYSCALL_FILENAME_I386); - set_gdbarch_get_syscall_number (gdbarch, - i386_linux_get_syscall_number); + set_gdbarch_get_syscall_number (gdbarch, i386_linux_get_syscall_number); set_gdbarch_get_siginfo_type (gdbarch, x86_linux_get_siginfo_type); set_gdbarch_report_signal_info (gdbarch, i386_linux_report_signal_info); } void _initialize_i386_linux_tdep (); + void _initialize_i386_linux_tdep () { |