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The M7 processor supports an Application Data Integrity (ADI) feature that detects invalid data accesses. When software allocates data, it chooses a 4-bit version number, sets the version in the upper 4 bits of the 64-bit pointer to that data, and stores the 4-bit version in every cacheline of the object. Hardware saves the latter in spare bits in the cache and memory hierarchy. On each load and store, the processor compares the upper 4 VA (virtual address) bits to the cacheline's version. If there is a mismatch, the processor generates a version mismatch trap which can be either precise or disrupting. The trap is an error condition which the kernel delivers to the process as a SIGSEGV signal. The upper 4 bits of the VA represent a version and are not part of the true address. The processor clears these bits and sign extends bit 59 to generate the true address. Note that 32-bit applications cannot use ADI. This patch adds ADI support in gdb which allows the user to examine current version tags and assign new version tags in the program. It also catches and reports precise or disrupting memory corruption traps. gdb/ChangeLog: 2017-08-07 Weimin Pan <weimin.pan@oracle.com> * sparc64-tdep.h: (adi_normalize_address): New export. * sparc-nat.h: (open_adi_tag_fd): New export. * sparc64-linux-nat.c: (open_adi_tag_fd): New function. * sparc64-linux-tdep.c: (SEGV_ACCADI, SEGV_ADIDERR, SEGV_ADIPERR) New defines. (sparc64_linux_handle_segmentation_fault): New function. (sparc64_linux_init_abi): Register sparc64_linux_handle_segmentation_fault * sparc64-tdep.c: Include cli-utils.h,gdbcmd.h,auxv.h. (sparc64_addr_bits_remove): New function. (sparc64_init_abi): Register sparc64_addr_bits_remove. (MAX_PROC_NAME_SIZE): New macro. (AT_ADI_BLKSZ, AT_ADI_NBITS, AT_ADI_UEONADI) New defines. (sparc64adilist): New variable. (adi_proc_list): New variable. (find_adi_info): New function. (add_adi_info): New function. (get_adi_info_proc): New function. (get_adi_info): New function. (info_adi_command): New function. (read_maps_entry): New function. (adi_available): New function. (adi_normalize_address): New function. (adi_align_address): New function. (adi_convert_byte_count): New function. (adi_tag_fd): New function. (adi_is_addr_mapped): New function. (adi_read_versions): New function. (adi_write_versions): New function. (adi_print_versions): New function. (do_examine): New function. (do_assign): New function. (adi_examine_command): New function. (adi_assign_command): New function. (_initialize_sparc64_adi_tdep): New function. gdb/doc/ChangeLog: 2017-08-07 Weimin Pan <weimin.pan@oracle.com> * gdb.texinfo (Architectures): Add new Sparc64 section to document ADI support. * NEWS: Add "adi examine" and "adi assign" commands. gdb/testsuite/ChangeLog: 2017-08-07 Weimin Pan <weimin.pan@oracle.com> * gdb.arch/sparc64-adi.exp: New file. * gdb.arch/sparc64-adi.c: New file.
144 lines
4.4 KiB
C
144 lines
4.4 KiB
C
/* Target-dependent code for UltraSPARC.
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Copyright (C) 2003-2017 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#ifndef SPARC64_TDEP_H
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#define SPARC64_TDEP_H 1
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struct frame_info;
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struct gdbarch;
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struct regcache;
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struct sparc_gregmap;
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struct trad_frame_saved_reg;
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#include "sparc-tdep.h"
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/* The stack pointer is offset from the stack frame by a BIAS of 2047
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(0x7ff) for 64-bit code. BIAS is likely to be defined on SPARC
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hosts, so undefine it first. */
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#undef BIAS
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#define BIAS 2047
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/* Register offsets for the general-purpose register set. */
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/* UltraSPARC doesn't have %psr. */
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#define r_tstate_offset r_psr_offset
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/* UltraSPARC doesn't have %wim either. */
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#define r_fprs_offset r_wim_offset
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/* Register numbers of various important registers. */
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enum sparc64_regnum
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{
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SPARC64_F32_REGNUM /* %f32 */
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= SPARC_F0_REGNUM + 32,
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SPARC64_F62_REGNUM /* %f62 */
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= SPARC64_F32_REGNUM + 15,
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SPARC64_PC_REGNUM, /* %pc */
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SPARC64_NPC_REGNUM, /* %npc */
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SPARC64_STATE_REGNUM,
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SPARC64_FSR_REGNUM, /* %fsr */
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SPARC64_FPRS_REGNUM, /* %fprs */
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SPARC64_Y_REGNUM, /* %y */
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};
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/* Pseudo registers. */
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enum sparc64_pseudo_regnum
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{
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SPARC64_CWP_REGNUM = 0, /* %cwp */
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SPARC64_PSTATE_REGNUM, /* %pstate */
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SPARC64_ASI_REGNUM, /* %asi */
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SPARC64_CCR_REGNUM, /* %ccr */
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SPARC64_D0_REGNUM, /* %d0 */
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SPARC64_D10_REGNUM /* %d10 */
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= SPARC64_D0_REGNUM + 5,
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SPARC64_D30_REGNUM /* %d30 */
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= SPARC64_D0_REGNUM + 15,
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SPARC64_D32_REGNUM /* %d32 */
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= SPARC64_D0_REGNUM + 16,
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SPARC64_D62_REGNUM /* %d62 */
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= SPARC64_D0_REGNUM + 31,
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SPARC64_Q0_REGNUM, /* %q0 */
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SPARC64_Q8_REGNUM /* %q8 */
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= SPARC64_Q0_REGNUM + 2,
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SPARC64_Q28_REGNUM /* %q28 */
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= SPARC64_Q0_REGNUM + 7,
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SPARC64_Q32_REGNUM /* %q32 */
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= SPARC64_Q0_REGNUM + 8,
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SPARC64_Q60_REGNUM /* %q60 */
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= SPARC64_Q0_REGNUM + 15
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};
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/* Processor state bits. */
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#define SPARC64_PSTATE_AG 0x001
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#define SPARC64_PSTATE_IE 0x002
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#define SPARC64_PSTATE_PRIV 0x004
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#define SPARC64_PSTATE_AM 0x008
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#define SPARC64_PSTATE_PEF 0x010
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#define SPARC64_PSTATE_RED 0x020
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#define SPARC64_PSTATE_TLE 0x100
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#define SPARC64_PSTATE_CLE 0x200
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#define SPARC64_PSTATE_PID0 0x400
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#define SPARC64_PSTATE_PID1 0x800
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extern void sparc64_init_abi (struct gdbarch_info info,
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struct gdbarch *gdbarch);
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extern void sparc64_supply_gregset (const struct sparc_gregmap *gregmap,
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struct regcache *regcache,
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int regnum, const void *gregs);
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extern void sparc64_collect_gregset (const struct sparc_gregmap *gregmap,
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const struct regcache *regcache,
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int regnum, void *gregs);
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extern void sparc64_supply_fpregset (const struct sparc_fpregmap *fpregmap,
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struct regcache *regcache,
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int regnum, const void *fpregs);
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extern void sparc64_collect_fpregset (const struct sparc_fpregmap *fpregmap,
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const struct regcache *regcache,
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int regnum, void *fpregs);
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/* Functions and variables exported from sparc64-sol2-tdep.c. */
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/* Register offsets for Solaris 2. */
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extern const struct sparc_gregmap sparc64_sol2_gregmap;
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extern const struct sparc_fpregmap sparc64_sol2_fpregmap;
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extern void sparc64_sol2_init_abi (struct gdbarch_info info,
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struct gdbarch *gdbarch);
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/* Variables exported from sparc64-fbsd-tdep.c. */
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/* Register offsets for FreeBSD/sparc64. */
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extern const struct sparc_gregmap sparc64fbsd_gregmap;
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/* Functions and variables exported from sparc64-nbsd-tdep.c. */
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/* Register offsets for NetBSD/sparc64. */
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extern const struct sparc_gregmap sparc64nbsd_gregmap;
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extern struct trad_frame_saved_reg *
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sparc64nbsd_sigcontext_saved_regs (CORE_ADDR sigcontext_addr,
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struct frame_info *next_frame);
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extern const struct sparc_fpregmap sparc64_bsd_fpregmap;
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extern void sparc64_forget_process (pid_t pid);
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#endif /* sparc64-tdep.h */
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