/* Target-dependent code for GNU/Linux i386.
- Copyright (C) 2000-2014 Free Software Foundation, Inc.
+ Copyright (C) 2000-2016 Free Software Foundation, Inc.
This file is part of GDB.
#include "i386-tdep.h"
#include "i386-linux-tdep.h"
#include "linux-tdep.h"
+#include "utils.h"
#include "glibc-tdep.h"
#include "solib-svr4.h"
#include "symtab.h"
#include "xml-syscall.h"
#include "i387-tdep.h"
-#include "i386-xstate.h"
+#include "x86-xstate.h"
/* The syscall's XML filename for i386. */
#define XML_SYSCALL_FILENAME_I386 "syscalls/i386-linux.xml"
#include "record-full.h"
#include "linux-record.h"
-#include <stdint.h>
-
#include "features/i386/i386-linux.c"
#include "features/i386/i386-mmx-linux.c"
#include "features/i386/i386-mpx-linux.c"
#include "features/i386/i386-avx-linux.c"
#include "features/i386/i386-avx512-linux.c"
-/* Supported register note sections. */
-static struct core_regset_section i386_linux_regset_sections[] =
-{
- { ".reg", 68, "general-purpose" },
- { ".reg2", 108, "floating-point" },
- { NULL, 0 }
-};
-
-static struct core_regset_section i386_linux_sse_regset_sections[] =
-{
- { ".reg", 68, "general-purpose" },
- { ".reg-xfp", 512, "extended floating-point" },
- { NULL, 0 }
-};
-
-static struct core_regset_section i386_linux_avx_regset_sections[] =
-{
- { ".reg", 68, "general-purpose" },
- { ".reg-xstate", I386_XSTATE_MAX_SIZE, "XSAVE extended state" },
- { NULL, 0 }
-};
-
/* Return non-zero, when the register is in the corresponding register
group. Put the LINUX_ORIG_EAX register in the system group. */
static int
enum { i386_syscall_max = 499 };
if (syscall <= i386_syscall_max)
- return syscall;
+ return (enum gdb_syscall) syscall;
else
- return -1;
+ return gdb_sys_no_syscall;
+}
+
+/* Value of the sigcode in case of a boundary fault. */
+
+#define SIG_CODE_BONDARY_FAULT 3
+
+/* i386 GNU/Linux implementation of the handle_segmentation_fault
+ gdbarch hook. Displays information related to MPX bound
+ violations. */
+void
+i386_linux_handle_segmentation_fault (struct gdbarch *gdbarch,
+ struct ui_out *uiout)
+{
+ /* -Wmaybe-uninitialized */
+ CORE_ADDR lower_bound = 0, upper_bound = 0, access = 0;
+ int is_upper;
+ long sig_code = 0;
+
+ if (!i386_mpx_enabled ())
+ return;
+
+ TRY
+ {
+ /* 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");
+ }
+ CATCH (exception, RETURN_MASK_ALL)
+ {
+ return;
+ }
+ END_CATCH
+
+ /* If this is not a boundary violation just return. */
+ if (sig_code != SIG_CODE_BONDARY_FAULT)
+ return;
+
+ is_upper = (access > upper_bound ? 1 : 0);
+
+ ui_out_text (uiout, "\n");
+ if (is_upper)
+ ui_out_field_string (uiout, "sigcode-meaning",
+ _("Upper bound violation"));
+ else
+ ui_out_field_string (uiout, "sigcode-meaning",
+ _("Lower bound violation"));
+
+ ui_out_text (uiout, _(" while accessing address "));
+ ui_out_field_fmt (uiout, "bound-access", "%s",
+ paddress (gdbarch, access));
+
+ ui_out_text (uiout, _("\nBounds: [lower = "));
+ ui_out_field_fmt (uiout, "lower-bound", "%s",
+ paddress (gdbarch, lower_bound));
+
+ ui_out_text (uiout, _(", upper = "));
+ ui_out_field_fmt (uiout, "upper-bound", "%s",
+ paddress (gdbarch, upper_bound));
+
+ ui_out_text (uiout, _("]"));
}
/* Parse the arguments of current system call instruction and record
size_t size = bfd_section_size (abfd, xstate);
/* Check extended state size. */
- if (size < I386_XSTATE_AVX_SIZE)
- xcr0 = I386_XSTATE_SSE_MASK;
+ if (size < X86_XSTATE_AVX_SIZE)
+ xcr0 = X86_XSTATE_SSE_MASK;
else
{
char contents[8];
/* Linux/i386. */
uint64_t xcr0 = i386_linux_core_read_xcr0 (abfd);
- switch ((xcr0 & I386_XSTATE_ALL_MASK))
+ switch ((xcr0 & X86_XSTATE_ALL_MASK))
{
- case I386_XSTATE_MPX_AVX512_MASK:
- case I386_XSTATE_AVX512_MASK:
+ case X86_XSTATE_MPX_AVX512_MASK:
+ case X86_XSTATE_AVX512_MASK:
return tdesc_i386_avx512_linux;
- case I386_XSTATE_MPX_MASK:
+ case X86_XSTATE_MPX_MASK:
return tdesc_i386_mpx_linux;
- case I386_XSTATE_AVX_MASK:
+ case X86_XSTATE_AVX_MASK:
return tdesc_i386_avx_linux;
- case I386_XSTATE_SSE_MASK:
+ case X86_XSTATE_SSE_MASK:
return tdesc_i386_linux;
- case I386_XSTATE_X87_MASK:
+ case X86_XSTATE_X87_MASK:
return tdesc_i386_mmx_linux;
default:
break;
return tdesc_i386_mmx_linux;
}
+/* Similar to i386_supply_fpregset, but use XSAVE extended state. */
+
+static void
+i386_linux_supply_xstateregset (const struct regset *regset,
+ struct regcache *regcache, int regnum,
+ const void *xstateregs, size_t len)
+{
+ i387_supply_xsave (regcache, regnum, xstateregs);
+}
+
+struct type *
+x86_linux_get_siginfo_type (struct gdbarch *gdbarch)
+{
+ 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)
+{
+ 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
+ };
+
+/* Iterate over core file register note sections. */
+
+static void
+i386_linux_iterate_over_regset_sections (struct gdbarch *gdbarch,
+ iterate_over_regset_sections_cb *cb,
+ void *cb_data,
+ const struct regcache *regcache)
+{
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+
+ cb (".reg", 68, &i386_gregset, NULL, cb_data);
+
+ if (tdep->xcr0 & X86_XSTATE_AVX)
+ cb (".reg-xstate", X86_XSTATE_SIZE (tdep->xcr0),
+ &i386_linux_xstateregset, "XSAVE extended state", cb_data);
+ else if (tdep->xcr0 & X86_XSTATE_SSE)
+ cb (".reg-xfp", 512, &i386_fpregset, "extended floating-point",
+ cb_data);
+ else
+ cb (".reg2", 108, &i386_fpregset, NULL, cb_data);
+}
+
/* Linux kernel shows PC value after the 'int $0x80' instruction even if
inferior is still inside the syscall. On next PTRACE_SINGLESTEP it will
finish the syscall but PC will not change.
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
const struct target_desc *tdesc = info.target_desc;
- struct tdesc_arch_data *tdesc_data = (void *) info.tdep_info;
+ struct tdesc_arch_data *tdesc_data
+ = (struct tdesc_arch_data *) info.tdep_info;
const struct tdesc_feature *feature;
int valid_p;
i386_linux_record_tdep.size_flock = 16;
i386_linux_record_tdep.size_oldold_utsname = 45;
i386_linux_record_tdep.size_ustat = 20;
- i386_linux_record_tdep.size_old_sigaction = 140;
- i386_linux_record_tdep.size_old_sigset_t = 128;
+ i386_linux_record_tdep.size_old_sigaction = 16;
+ i386_linux_record_tdep.size_old_sigset_t = 4;
i386_linux_record_tdep.size_rlimit = 8;
i386_linux_record_tdep.size_rusage = 72;
i386_linux_record_tdep.size_timeval = 8;
i386_linux_record_tdep.size_old_gid_t = 2;
i386_linux_record_tdep.size_old_uid_t = 2;
i386_linux_record_tdep.size_fd_set = 128;
- i386_linux_record_tdep.size_dirent = 268;
- i386_linux_record_tdep.size_dirent64 = 276;
+ i386_linux_record_tdep.size_old_dirent = 268;
i386_linux_record_tdep.size_statfs = 64;
i386_linux_record_tdep.size_statfs64 = 84;
i386_linux_record_tdep.size_sockaddr = 16;
i386_linux_record_tdep.size_NFS_FHSIZE = 32;
i386_linux_record_tdep.size_knfsd_fh = 132;
i386_linux_record_tdep.size_TASK_COMM_LEN = 16;
- i386_linux_record_tdep.size_sigaction = 140;
+ i386_linux_record_tdep.size_sigaction = 20;
i386_linux_record_tdep.size_sigset_t = 8;
i386_linux_record_tdep.size_siginfo_t = 128;
i386_linux_record_tdep.size_cap_user_data_t = 12;
i386_linux_record_tdep.size_stack_t = 12;
i386_linux_record_tdep.size_off_t = i386_linux_record_tdep.size_long;
i386_linux_record_tdep.size_stat64 = 96;
- i386_linux_record_tdep.size_gid_t = 2;
- i386_linux_record_tdep.size_uid_t = 2;
+ i386_linux_record_tdep.size_gid_t = 4;
+ i386_linux_record_tdep.size_uid_t = 4;
i386_linux_record_tdep.size_PAGE_SIZE = 4096;
i386_linux_record_tdep.size_flock64 = 24;
i386_linux_record_tdep.size_user_desc = 16;
i386_linux_record_tdep.size_itimerspec
= i386_linux_record_tdep.size_timespec * 2;
i386_linux_record_tdep.size_mq_attr = 32;
- i386_linux_record_tdep.size_siginfo = 128;
i386_linux_record_tdep.size_termios = 36;
i386_linux_record_tdep.size_termios2 = 44;
i386_linux_record_tdep.size_pid_t = 4;
i386_linux_record_tdep.size_hayes_esp_config = 12;
i386_linux_record_tdep.size_size_t = 4;
i386_linux_record_tdep.size_iovec = 8;
+ i386_linux_record_tdep.size_time_t = 4;
/* These values are the second argument of system call "sys_ioctl".
They are obtained from Linux Kernel source. */
set_gdbarch_fetch_tls_load_module_address (gdbarch,
svr4_fetch_objfile_link_map);
- /* Install supported register note sections. */
- if (tdesc_find_feature (tdesc, "org.gnu.gdb.i386.avx512")
- || tdesc_find_feature (tdesc, "org.gnu.gdb.i386.avx"))
- set_gdbarch_core_regset_sections (gdbarch, i386_linux_avx_regset_sections);
- else if (tdesc_find_feature (tdesc, "org.gnu.gdb.i386.sse"))
- set_gdbarch_core_regset_sections (gdbarch, i386_linux_sse_regset_sections);
- else
- set_gdbarch_core_regset_sections (gdbarch, i386_linux_regset_sections);
-
+ /* Core file support. */
+ set_gdbarch_iterate_over_regset_sections
+ (gdbarch, i386_linux_iterate_over_regset_sections);
set_gdbarch_core_read_description (gdbarch,
i386_linux_core_read_description);
set_gdbarch_displaced_step_free_closure (gdbarch,
simple_displaced_step_free_closure);
set_gdbarch_displaced_step_location (gdbarch,
- displaced_step_at_entry_point);
+ linux_displaced_step_location);
/* Functions for 'catch syscall'. */
- set_xml_syscall_file_name (XML_SYSCALL_FILENAME_I386);
+ set_xml_syscall_file_name (gdbarch, XML_SYSCALL_FILENAME_I386);
set_gdbarch_get_syscall_number (gdbarch,
i386_linux_get_syscall_number);
- set_gdbarch_get_siginfo_type (gdbarch, linux_get_siginfo_type);
+ set_gdbarch_get_siginfo_type (gdbarch, x86_linux_get_siginfo_type);
+ set_gdbarch_handle_segmentation_fault (gdbarch,
+ i386_linux_handle_segmentation_fault);
}
/* Provide a prototype to silence -Wmissing-prototypes. */