/* Target-dependent code for GNU/Linux i386.
- Copyright (C) 2000-2015 Free Software Foundation, Inc.
+ Copyright (C) 2000-2017 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 "record-full.h"
#include "linux-record.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"
+
+#include "arch/i386.h"
+#include "target-descriptions.h"
/* Return non-zero, when the register is in the corresponding register
group. Put the LINUX_ORIG_EAX register in the system group. */
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);
+
+ uiout->text ("\n");
+ if (is_upper)
+ uiout->field_string ("sigcode-meaning", _("Upper bound violation"));
+ else
+ uiout->field_string ("sigcode-meaning", _("Lower bound violation"));
+
+ uiout->text (_(" while accessing address "));
+ uiout->field_fmt ("bound-access", "%s", paddress (gdbarch, access));
+
+ uiout->text (_("\nBounds: [lower = "));
+ uiout->field_fmt ("lower-bound", "%s", paddress (gdbarch, lower_bound));
+
+ uiout->text (_(", upper = "));
+ uiout->field_fmt ("upper-bound", "%s", paddress (gdbarch, upper_bound));
+
+ uiout->text (_("]"));
+}
+
/* 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
-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" */
};
return xcr0;
}
+/* See i386-linux-tdep.h. */
+
+const struct target_desc *
+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*/] = {};
+ 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];
+
+ if (*tdesc == NULL)
+ *tdesc = i386_create_target_description (xcr0);
+
+ return *tdesc;
+}
+
/* Get Linux/x86 target description from core dump. */
static const struct target_desc *
{
/* Linux/i386. */
uint64_t xcr0 = i386_linux_core_read_xcr0 (abfd);
+ const struct target_desc *tdesc = i386_linux_read_description (xcr0);
- switch ((xcr0 & X86_XSTATE_ALL_MASK))
- {
- case X86_XSTATE_MPX_AVX512_MASK:
- case X86_XSTATE_AVX512_MASK:
- return tdesc_i386_avx512_linux;
- case X86_XSTATE_MPX_MASK:
- return tdesc_i386_mpx_linux;
- case X86_XSTATE_AVX_MASK:
- return tdesc_i386_avx_linux;
- case X86_XSTATE_SSE_MASK:
- return tdesc_i386_linux;
- case X86_XSTATE_X87_MASK:
- return tdesc_i386_mmx_linux;
- default:
- break;
- }
+ if (tdesc != NULL)
+ return tdesc;
if (bfd_get_section_by_name (abfd, ".reg-xfp") != NULL)
- return tdesc_i386_linux;
+ return i386_linux_read_description (X86_XSTATE_SSE_MASK);
else
- return tdesc_i386_mmx_linux;
+ return i386_linux_read_description (X86_XSTATE_X87_MASK);
}
/* Similar to i386_supply_fpregset, but use XSAVE extended state. */
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
{
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 = info.tdesc_data;
const struct tdesc_feature *feature;
int valid_p;
set_gdbarch_num_regs (gdbarch, I386_LINUX_NUM_REGS);
if (! tdesc_has_registers (tdesc))
- tdesc = tdesc_i386_linux;
+ tdesc = i386_linux_read_description (X86_XSTATE_SSE_MASK);
tdep->tdesc = tdesc;
feature = tdesc_find_feature (tdesc, "org.gnu.gdb.i386.linux");
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_displaced_step_copy_insn (gdbarch,
i386_linux_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,
linux_displaced_step_location);
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, x86_linux_get_siginfo_type);
+ set_gdbarch_handle_segmentation_fault (gdbarch,
+ i386_linux_handle_segmentation_fault);
}
/* Provide a prototype to silence -Wmissing-prototypes. */
gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_LINUX,
i386_linux_init_abi);
- /* Initialize the Linux target description. */
- initialize_tdesc_i386_linux ();
- initialize_tdesc_i386_mmx_linux ();
- initialize_tdesc_i386_avx_linux ();
- initialize_tdesc_i386_mpx_linux ();
- initialize_tdesc_i386_avx512_linux ();
+#if GDB_SELF_TEST
+ struct
+ {
+ const char *xml;
+ uint64_t mask;
+ } xml_masks[] = {
+ { "i386/i386-linux.xml", X86_XSTATE_SSE_MASK },
+ { "i386/i386-mmx-linux.xml", X86_XSTATE_X87_MASK },
+ { "i386/i386-avx-linux.xml", X86_XSTATE_AVX_MASK },
+ { "i386/i386-mpx-linux.xml", X86_XSTATE_MPX_MASK },
+ { "i386/i386-avx-mpx-linux.xml", X86_XSTATE_AVX_MPX_MASK },
+ { "i386/i386-avx-avx512-linux.xml", X86_XSTATE_AVX_AVX512_MASK },
+ { "i386/i386-avx-mpx-avx512-pku-linux.xml",
+ X86_XSTATE_AVX_MPX_AVX512_PKU_MASK },
+ };
+
+ for (auto &a : xml_masks)
+ {
+ auto tdesc = i386_linux_read_description (a.mask);
+
+ selftests::record_xml_tdesc (a.xml, tdesc);
+ }
+#endif /* GDB_SELF_TEST */
}
projects / deliverable / binutils-gdb.git / blobdiff