/* Target-dependent code for GNU/Linux x86-64.
- Copyright (C) 2001-2015 Free Software Foundation, Inc.
+ Copyright (C) 2001-2020 Free Software Foundation, Inc.
Contributed by Jiri Smid, SuSE Labs.
This file is part of GDB.
#include "defs.h"
#include "arch-utils.h"
+#include "displaced-stepping.h"
#include "frame.h"
+#include "gdbarch.h"
#include "gdbcore.h"
#include "regcache.h"
#include "osabi.h"
#include "amd64-linux-tdep.h"
#include "i386-linux-tdep.h"
#include "linux-tdep.h"
-#include "x86-xstate.h"
+#include "gdbsupport/x86-xstate.h"
+#include "inferior.h"
#include "amd64-tdep.h"
#include "solib-svr4.h"
#include "xml-syscall.h"
#include "glibc-tdep.h"
-
-#include "features/i386/amd64-linux.c"
-#include "features/i386/amd64-avx-linux.c"
-#include "features/i386/amd64-mpx-linux.c"
-#include "features/i386/amd64-avx512-linux.c"
-
-#include "features/i386/x32-linux.c"
-#include "features/i386/x32-avx-linux.c"
-#include "features/i386/x32-avx512-linux.c"
+#include "arch/amd64.h"
+#include "target-descriptions.h"
+#include "observable.h"
/* The syscall's XML filename for i386. */
#define XML_SYSCALL_FILENAME_AMD64 "syscalls/amd64-linux.xml"
-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, /* PKEYS register pkru */
+
+ /* End of hardware registers */
+ 21 * 8, 22 * 8, /* fs_base and gs_base. */
15 * 8 /* "orig_rax" */
};
\f
static LONGEST
amd64_linux_get_syscall_number (struct gdbarch *gdbarch,
- ptid_t ptid)
+ thread_info *thread)
{
- struct regcache *regcache = get_thread_regcache (ptid);
+ struct regcache *regcache = get_thread_regcache (thread);
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
/* The content of a register. */
gdb_byte buf[8];
/* Getting the system call number from the register.
When dealing with x86_64 architecture, this information
is stored at %rax register. */
- regcache_cooked_read (regcache, AMD64_LINUX_ORIG_RAX_REGNUM, buf);
+ regcache->cooked_read (AMD64_LINUX_ORIG_RAX_REGNUM, buf);
ret = extract_signed_integer (buf, 8, byte_order);
amd64_linux_register_reggroup_p (struct gdbarch *gdbarch, int regnum,
struct reggroup *group)
{
- if (regnum == AMD64_LINUX_ORIG_RAX_REGNUM)
+ if (regnum == AMD64_LINUX_ORIG_RAX_REGNUM
+ || regnum == AMD64_FSBASE_REGNUM
+ || regnum == AMD64_GSBASE_REGNUM)
return (group == system_reggroup
|| group == save_reggroup
|| group == restore_reggroup);
static enum gdb_syscall
amd64_canonicalize_syscall (enum amd64_syscall syscall_number)
{
+ DIAGNOSTIC_PUSH
+ DIAGNOSTIC_IGNORE_SWITCH_DIFFERENT_ENUM_TYPES
+
switch (syscall_number) {
case amd64_sys_read:
case amd64_x32_sys_read:
default:
return gdb_sys_no_syscall;
}
+
+ DIAGNOSTIC_POP
}
/* Parse the arguments of current system call instruction and record
return 0;
}
+const target_desc *
+amd64_linux_read_description (uint64_t xcr0_features_bit, bool is_x32)
+{
+ static target_desc *amd64_linux_tdescs \
+ [2/*AVX*/][2/*MPX*/][2/*AVX512*/][2/*PKRU*/] = {};
+ static target_desc *x32_linux_tdescs[2/*AVX*/][2/*AVX512*/] = {};
+
+ target_desc **tdesc;
+
+ if (is_x32)
+ {
+ tdesc = &x32_linux_tdescs[(xcr0_features_bit & X86_XSTATE_AVX) ? 1 : 0 ]
+ [(xcr0_features_bit & X86_XSTATE_AVX512) ? 1 : 0];
+ }
+ else
+ {
+ tdesc = &amd64_linux_tdescs[(xcr0_features_bit & X86_XSTATE_AVX) ? 1 : 0]
+ [(xcr0_features_bit & X86_XSTATE_MPX) ? 1 : 0]
+ [(xcr0_features_bit & X86_XSTATE_AVX512) ? 1 : 0]
+ [(xcr0_features_bit & X86_XSTATE_PKRU) ? 1 : 0];
+ }
+
+ if (*tdesc == NULL)
+ *tdesc = amd64_create_target_description (xcr0_features_bit, is_x32,
+ true, true);
+
+ return *tdesc;
+}
+
/* Get Linux/x86 target description from core dump. */
static const struct target_desc *
/* Linux/x86-64. */
uint64_t xcr0 = i386_linux_core_read_xcr0 (abfd);
- switch (xcr0 & X86_XSTATE_ALL_MASK)
- {
- case X86_XSTATE_MPX_AVX512_MASK:
- case X86_XSTATE_AVX512_MASK:
- if (gdbarch_ptr_bit (gdbarch) == 32)
- return tdesc_x32_avx512_linux;
- else
- return tdesc_amd64_avx512_linux;
- case X86_XSTATE_MPX_MASK:
- if (gdbarch_ptr_bit (gdbarch) == 32)
- return tdesc_x32_avx_linux; /* No x32 MPX falling back to AVX. */
- else
- return tdesc_amd64_mpx_linux;
- case X86_XSTATE_AVX_MASK:
- if (gdbarch_ptr_bit (gdbarch) == 32)
- return tdesc_x32_avx_linux;
- else
- return tdesc_amd64_avx_linux;
- default:
- if (gdbarch_ptr_bit (gdbarch) == 32)
- return tdesc_x32_linux;
- else
- return tdesc_amd64_linux;
- }
+ return amd64_linux_read_description (xcr0 & X86_XSTATE_ALL_MASK,
+ gdbarch_ptr_bit (gdbarch) == 32);
}
/* Similar to amd64_supply_fpregset, but use XSAVE extended state. */
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
- cb (".reg", 27 * 8, &i386_gregset, NULL, cb_data);
- cb (".reg2", 512, &amd64_fpregset, NULL, cb_data);
- cb (".reg-xstate", X86_XSTATE_SIZE (tdep->xcr0),
+ cb (".reg", 27 * 8, 27 * 8, &i386_gregset, NULL, cb_data);
+ cb (".reg2", 512, 512, &amd64_fpregset, NULL, cb_data);
+ cb (".reg-xstate", X86_XSTATE_SIZE (tdep->xcr0), X86_XSTATE_SIZE (tdep->xcr0),
&amd64_linux_xstateregset, "XSAVE extended state", cb_data);
}
static void
amd64_dtrace_parse_probe_argument (struct gdbarch *gdbarch,
- struct parser_state *pstate,
+ struct expr_builder *builder,
int narg)
{
- enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
- struct frame_info *this_frame = get_selected_frame (NULL);
struct stoken str;
/* DTrace probe arguments can be found on the ABI-defined places for
int regno = arg_reg_map[narg];
const char *regname = user_reg_map_regnum_to_name (gdbarch, regno);
- write_exp_elt_opcode (pstate, OP_REGISTER);
+ write_exp_elt_opcode (builder, OP_REGISTER);
str.ptr = regname;
str.length = strlen (regname);
- write_exp_string (pstate, str);
- write_exp_elt_opcode (pstate, OP_REGISTER);
+ write_exp_string (builder, str);
+ write_exp_elt_opcode (builder, OP_REGISTER);
}
else
{
/* Additional arguments are passed on the stack. */
- CORE_ADDR sp;
const char *regname = user_reg_map_regnum_to_name (gdbarch, AMD64_RSP_REGNUM);
/* Displacement. */
- write_exp_elt_opcode (pstate, OP_LONG);
- write_exp_elt_type (pstate, builtin_type (gdbarch)->builtin_long);
- write_exp_elt_longcst (pstate, narg - 6);
- write_exp_elt_opcode (pstate, OP_LONG);
+ write_exp_elt_opcode (builder, OP_LONG);
+ write_exp_elt_type (builder, builtin_type (gdbarch)->builtin_long);
+ write_exp_elt_longcst (builder, narg - 6);
+ write_exp_elt_opcode (builder, OP_LONG);
/* Register: SP. */
- write_exp_elt_opcode (pstate, OP_REGISTER);
+ write_exp_elt_opcode (builder, OP_REGISTER);
str.ptr = regname;
str.length = strlen (regname);
- write_exp_string (pstate, str);
- write_exp_elt_opcode (pstate, OP_REGISTER);
+ write_exp_string (builder, str);
+ write_exp_elt_opcode (builder, OP_REGISTER);
- write_exp_elt_opcode (pstate, BINOP_ADD);
+ write_exp_elt_opcode (builder, BINOP_ADD);
/* Cast to long. */
- write_exp_elt_opcode (pstate, UNOP_CAST);
- write_exp_elt_type (pstate,
+ write_exp_elt_opcode (builder, UNOP_CAST);
+ write_exp_elt_type (builder,
lookup_pointer_type (builtin_type (gdbarch)->builtin_long));
- write_exp_elt_opcode (pstate, UNOP_CAST);
+ write_exp_elt_opcode (builder, UNOP_CAST);
- write_exp_elt_opcode (pstate, UNOP_IND);
+ write_exp_elt_opcode (builder, UNOP_IND);
}
}
+struct amd64_linux_per_inferior
+{
+ amd64_linux_per_inferior (gdb::array_view<CORE_ADDR> disp_step_buffer_addrs)
+ : disp_step_buf_mgr (disp_step_buffer_addrs)
+ {}
+
+ multiple_displaced_buffer_manager disp_step_buf_mgr;
+};
+
+static const inferior_key<amd64_linux_per_inferior>
+ amd64_linux_per_inferior_data;
+
+/* Get the per-inferior AMD64/Linux data for INF. */
+
+static amd64_linux_per_inferior *
+get_amd64_linux_per_inferior (inferior *inf, gdbarch *arch)
+{
+ amd64_linux_per_inferior *per_inf = amd64_linux_per_inferior_data.get (inf);
+
+ if (per_inf == nullptr)
+ {
+ std::vector<CORE_ADDR> buffers;
+#if 0
+ /* Alternative implementation that maps some pages in the inferior,
+ allowing to have many buffers. */
+ CORE_ADDR displaced_step_mmap = gdbarch_infcall_mmap (arch, 16384, GDB_MMAP_PROT_READ | GDB_MMAP_PROT_EXEC);
+ gdb_assert (displaced_step_mmap != 0);
+
+ for (int i = 0; i < 1024; i++)
+ buffers.push_back (displaced_step_mmap + 16 * i);
+
+#else
+ /* Figure out where the displaced step buffers are. */
+ CORE_ADDR addr = linux_displaced_step_location (arch);
+ buffers.push_back (addr);
+ buffers.push_back (addr + gdbarch_max_insn_length (arch));
+#endif
+ per_inf = amd64_linux_per_inferior_data.emplace (inf, buffers);
+ }
+
+ CORE_ADDR addr = per_inf->disp_step_buf_mgr.first_buf_addr ();
+ CORE_ADDR cur_addr = linux_displaced_step_location (arch);
+ gdb_assert (addr == cur_addr);
+
+ return per_inf;
+}
+
+/* Implementation of the gdbarch_displaced_step_prepare method. */
+
+static displaced_step_prepare_status
+amd64_linux_displaced_step_prepare (gdbarch *arch, thread_info *thread)
+{
+ amd64_linux_per_inferior *per_inferior
+ = get_amd64_linux_per_inferior (thread->inf, arch);
+
+
+ return per_inferior->disp_step_buf_mgr.prepare (thread);
+}
+
+/* Implementation of the gdbarch_displaced_step_finish method. */
+
+static displaced_step_finish_status
+amd64_linux_displaced_step_finish (gdbarch *arch, thread_info *thread,
+ gdb_signal sig)
+{
+ amd64_linux_per_inferior *per_inferior
+ = get_amd64_linux_per_inferior (thread->inf, arch);
+
+ return per_inferior->disp_step_buf_mgr.finish (arch, thread, sig);
+}
+
static void
amd64_linux_init_abi_common(struct gdbarch_info info, struct gdbarch *gdbarch)
{
set_gdbarch_displaced_step_copy_insn (gdbarch,
amd64_displaced_step_copy_insn);
set_gdbarch_displaced_step_fixup (gdbarch, amd64_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_gdbarch_displaced_step_prepare (gdbarch, amd64_linux_displaced_step_prepare);
+ set_gdbarch_displaced_step_finish (gdbarch, amd64_linux_displaced_step_finish);
set_gdbarch_process_record (gdbarch, i386_process_record);
set_gdbarch_process_record_signal (gdbarch, amd64_linux_record_signal);
+
+ set_gdbarch_get_siginfo_type (gdbarch, x86_linux_get_siginfo_type);
+ set_gdbarch_handle_segmentation_fault (gdbarch,
+ i386_linux_handle_segmentation_fault);
}
static void
amd64_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
- const struct target_desc *tdesc = info.target_desc;
- struct tdesc_arch_data *tdesc_data
- = (struct tdesc_arch_data *) info.tdep_info;
+ struct tdesc_arch_data *tdesc_data = info.tdesc_data;
const struct tdesc_feature *feature;
int valid_p;
tdep->gregset_num_regs = ARRAY_SIZE (amd64_linux_gregset_reg_offset);
tdep->sizeof_gregset = 27 * 8;
- amd64_init_abi (info, gdbarch);
+ amd64_init_abi (info, gdbarch,
+ amd64_linux_read_description (X86_XSTATE_SSE_MASK, false));
+
+ const target_desc *tdesc = tdep->tdesc;
/* Reserve a number for orig_rax. */
set_gdbarch_num_regs (gdbarch, AMD64_LINUX_NUM_REGS);
- if (! tdesc_has_registers (tdesc))
- tdesc = tdesc_amd64_linux;
- tdep->tdesc = tdesc;
-
feature = tdesc_find_feature (tdesc, "org.gnu.gdb.i386.linux");
if (feature == NULL)
return;
amd64_x32_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
- const struct target_desc *tdesc = info.target_desc;
- struct tdesc_arch_data *tdesc_data
- = (struct tdesc_arch_data *) info.tdep_info;
+ struct tdesc_arch_data *tdesc_data = info.tdesc_data;
const struct tdesc_feature *feature;
int valid_p;
tdep->gregset_num_regs = ARRAY_SIZE (amd64_linux_gregset_reg_offset);
tdep->sizeof_gregset = 27 * 8;
- amd64_x32_init_abi (info, gdbarch);
+ amd64_x32_init_abi (info, gdbarch,
+ amd64_linux_read_description (X86_XSTATE_SSE_MASK,
+ true));
/* Reserve a number for orig_rax. */
set_gdbarch_num_regs (gdbarch, AMD64_LINUX_NUM_REGS);
- if (! tdesc_has_registers (tdesc))
- tdesc = tdesc_x32_linux;
- tdep->tdesc = tdesc;
+ const target_desc *tdesc = tdep->tdesc;
feature = tdesc_find_feature (tdesc, "org.gnu.gdb.i386.linux");
if (feature == NULL)
= gdbarch_long_bit (gdbarch) / TARGET_CHAR_BIT;
amd64_x32_linux_record_tdep.size_ulong
= gdbarch_long_bit (gdbarch) / TARGET_CHAR_BIT;
- amd64_x32_linux_record_tdep.size_msghdr = 56;
+ amd64_x32_linux_record_tdep.size_msghdr = 28;
amd64_x32_linux_record_tdep.size_itimerval = 32;
amd64_x32_linux_record_tdep.size_stat = 144;
amd64_x32_linux_record_tdep.size_old_utsname = 325;
amd64_x32_linux_record_tdep.size_sigset_t = 8;
amd64_x32_linux_record_tdep.size_siginfo_t = 128;
amd64_x32_linux_record_tdep.size_cap_user_data_t = 8;
- amd64_x32_linux_record_tdep.size_stack_t = 24;
+ amd64_x32_linux_record_tdep.size_stack_t = 12;
amd64_x32_linux_record_tdep.size_off_t = 8;
amd64_x32_linux_record_tdep.size_stat64 = 144;
amd64_x32_linux_record_tdep.size_gid_t = 4;
amd64_x32_linux_record_tdep.size_serial_struct = 72;
amd64_x32_linux_record_tdep.size_serial_icounter_struct = 80;
amd64_x32_linux_record_tdep.size_hayes_esp_config = 12;
- amd64_x32_linux_record_tdep.size_size_t = 8;
- amd64_x32_linux_record_tdep.size_iovec = 16;
+ amd64_x32_linux_record_tdep.size_size_t = 4;
+ amd64_x32_linux_record_tdep.size_iovec = 8;
amd64_x32_linux_record_tdep.size_time_t = 8;
/* These values are the second argument of system call "sys_fcntl"
set_solib_svr4_fetch_link_map_offsets
(gdbarch, svr4_ilp32_fetch_link_map_offsets);
}
-\f
-/* Provide a prototype to silence -Wmissing-prototypes. */
-extern void _initialize_amd64_linux_tdep (void);
+static void
+amd64_linux_inferior_appeared (inferior *inf)
+{
+ amd64_linux_per_inferior_data.clear (inf);
+}
+
+static void
+amd64_linux_inferior_execd (inferior *inf)
+{
+ amd64_linux_per_inferior_data.clear (inf);
+}
+void _initialize_amd64_linux_tdep ();
void
-_initialize_amd64_linux_tdep (void)
+_initialize_amd64_linux_tdep ()
{
gdbarch_register_osabi (bfd_arch_i386, bfd_mach_x86_64,
GDB_OSABI_LINUX, amd64_linux_init_abi);
gdbarch_register_osabi (bfd_arch_i386, bfd_mach_x64_32,
GDB_OSABI_LINUX, amd64_x32_linux_init_abi);
- /* Initialize the Linux target description. */
- initialize_tdesc_amd64_linux ();
- initialize_tdesc_amd64_avx_linux ();
- initialize_tdesc_amd64_mpx_linux ();
- initialize_tdesc_amd64_avx512_linux ();
-
- initialize_tdesc_x32_linux ();
- initialize_tdesc_x32_avx_linux ();
- initialize_tdesc_x32_avx512_linux ();
+ gdb::observers::inferior_appeared.attach (amd64_linux_inferior_appeared);
+ gdb::observers::inferior_execd.attach (amd64_linux_inferior_execd);
}
projects / deliverable / binutils-gdb.git / blobdiff