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- /* Target-dependent code for GNU/Linux on s390.
- Copyright (C) 2001-2022 Free Software Foundation, Inc.
- Contributed by D.J. Barrow (djbarrow@de.ibm.com,barrow_dj@yahoo.com)
- for IBM Deutschland Entwicklung GmbH, IBM Corporation.
- This file is part of GDB.
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 3 of the License, or
- (at your option) any later version.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>. */
- #include "defs.h"
- #include "auxv.h"
- #include "elf/common.h"
- #include "frame-base.h"
- #include "frame-unwind.h"
- #include "gdbarch.h"
- #include "gdbcore.h"
- #include "linux-record.h"
- #include "linux-tdep.h"
- #include "objfiles.h"
- #include "osabi.h"
- #include "regcache.h"
- #include "record-full.h"
- #include "regset.h"
- #include "s390-tdep.h"
- #include "s390-linux-tdep.h"
- #include "solib-svr4.h"
- #include "target.h"
- #include "trad-frame.h"
- #include "xml-syscall.h"
- #include "features/s390-linux32v1.c"
- #include "features/s390-linux32v2.c"
- #include "features/s390-linux64.c"
- #include "features/s390-linux64v1.c"
- #include "features/s390-linux64v2.c"
- #include "features/s390-te-linux64.c"
- #include "features/s390-vx-linux64.c"
- #include "features/s390-tevx-linux64.c"
- #include "features/s390-gs-linux64.c"
- #include "features/s390x-linux64v1.c"
- #include "features/s390x-linux64v2.c"
- #include "features/s390x-te-linux64.c"
- #include "features/s390x-vx-linux64.c"
- #include "features/s390x-tevx-linux64.c"
- #include "features/s390x-gs-linux64.c"
- #define XML_SYSCALL_FILENAME_S390 "syscalls/s390-linux.xml"
- #define XML_SYSCALL_FILENAME_S390X "syscalls/s390x-linux.xml"
- /* Register handling. */
- /* Implement cannot_store_register gdbarch method. */
- static int
- s390_cannot_store_register (struct gdbarch *gdbarch, int regnum)
- {
- /* The last-break address is read-only. */
- return regnum == S390_LAST_BREAK_REGNUM;
- }
- /* Implement write_pc gdbarch method. */
- static void
- s390_write_pc (struct regcache *regcache, CORE_ADDR pc)
- {
- struct gdbarch *gdbarch = regcache->arch ();
- s390_gdbarch_tdep *tdep = (s390_gdbarch_tdep *) gdbarch_tdep (gdbarch);
- regcache_cooked_write_unsigned (regcache, tdep->pc_regnum, pc);
- /* Set special SYSTEM_CALL register to 0 to prevent the kernel from
- messing with the PC we just installed, if we happen to be within
- an interrupted system call that the kernel wants to restart.
- Note that after we return from the dummy call, the SYSTEM_CALL and
- ORIG_R2 registers will be automatically restored, and the kernel
- continues to restart the system call at this point. */
- if (register_size (gdbarch, S390_SYSTEM_CALL_REGNUM) > 0)
- regcache_cooked_write_unsigned (regcache, S390_SYSTEM_CALL_REGNUM, 0);
- }
- /* Maps for register sets. */
- static const struct regcache_map_entry s390_gregmap[] =
- {
- { 1, S390_PSWM_REGNUM },
- { 1, S390_PSWA_REGNUM },
- { 16, S390_R0_REGNUM },
- { 16, S390_A0_REGNUM },
- { 1, S390_ORIG_R2_REGNUM },
- { 0 }
- };
- static const struct regcache_map_entry s390_fpregmap[] =
- {
- { 1, S390_FPC_REGNUM, 8 },
- { 16, S390_F0_REGNUM, 8 },
- { 0 }
- };
- static const struct regcache_map_entry s390_regmap_upper[] =
- {
- { 16, S390_R0_UPPER_REGNUM, 4 },
- { 0 }
- };
- static const struct regcache_map_entry s390_regmap_last_break[] =
- {
- { 1, REGCACHE_MAP_SKIP, 4 },
- { 1, S390_LAST_BREAK_REGNUM, 4 },
- { 0 }
- };
- static const struct regcache_map_entry s390x_regmap_last_break[] =
- {
- { 1, S390_LAST_BREAK_REGNUM, 8 },
- { 0 }
- };
- static const struct regcache_map_entry s390_regmap_system_call[] =
- {
- { 1, S390_SYSTEM_CALL_REGNUM, 4 },
- { 0 }
- };
- static const struct regcache_map_entry s390_regmap_tdb[] =
- {
- { 1, S390_TDB_DWORD0_REGNUM, 8 },
- { 1, S390_TDB_ABORT_CODE_REGNUM, 8 },
- { 1, S390_TDB_CONFLICT_TOKEN_REGNUM, 8 },
- { 1, S390_TDB_ATIA_REGNUM, 8 },
- { 12, REGCACHE_MAP_SKIP, 8 },
- { 16, S390_TDB_R0_REGNUM, 8 },
- { 0 }
- };
- static const struct regcache_map_entry s390_regmap_vxrs_low[] =
- {
- { 16, S390_V0_LOWER_REGNUM, 8 },
- { 0 }
- };
- static const struct regcache_map_entry s390_regmap_vxrs_high[] =
- {
- { 16, S390_V16_REGNUM, 16 },
- { 0 }
- };
- static const struct regcache_map_entry s390_regmap_gs[] =
- {
- { 1, REGCACHE_MAP_SKIP, 8 },
- { 1, S390_GSD_REGNUM, 8 },
- { 1, S390_GSSM_REGNUM, 8 },
- { 1, S390_GSEPLA_REGNUM, 8 },
- { 0 }
- };
- static const struct regcache_map_entry s390_regmap_gsbc[] =
- {
- { 1, REGCACHE_MAP_SKIP, 8 },
- { 1, S390_BC_GSD_REGNUM, 8 },
- { 1, S390_BC_GSSM_REGNUM, 8 },
- { 1, S390_BC_GSEPLA_REGNUM, 8 },
- { 0 }
- };
- /* Supply the TDB regset. Like regcache_supply_regset, but invalidate
- the TDB registers unless the TDB format field is valid. */
- static void
- s390_supply_tdb_regset (const struct regset *regset, struct regcache *regcache,
- int regnum, const void *regs, size_t len)
- {
- ULONGEST tdw;
- enum register_status ret;
- regcache_supply_regset (regset, regcache, regnum, regs, len);
- ret = regcache_cooked_read_unsigned (regcache, S390_TDB_DWORD0_REGNUM, &tdw);
- if (ret != REG_VALID || (tdw >> 56) != 1)
- regcache_supply_regset (regset, regcache, regnum, NULL, len);
- }
- const struct regset s390_gregset = {
- s390_gregmap,
- regcache_supply_regset,
- regcache_collect_regset
- };
- const struct regset s390_fpregset = {
- s390_fpregmap,
- regcache_supply_regset,
- regcache_collect_regset
- };
- static const struct regset s390_upper_regset = {
- s390_regmap_upper,
- regcache_supply_regset,
- regcache_collect_regset
- };
- const struct regset s390_last_break_regset = {
- s390_regmap_last_break,
- regcache_supply_regset,
- regcache_collect_regset
- };
- const struct regset s390x_last_break_regset = {
- s390x_regmap_last_break,
- regcache_supply_regset,
- regcache_collect_regset
- };
- const struct regset s390_system_call_regset = {
- s390_regmap_system_call,
- regcache_supply_regset,
- regcache_collect_regset
- };
- const struct regset s390_tdb_regset = {
- s390_regmap_tdb,
- s390_supply_tdb_regset,
- regcache_collect_regset
- };
- const struct regset s390_vxrs_low_regset = {
- s390_regmap_vxrs_low,
- regcache_supply_regset,
- regcache_collect_regset
- };
- const struct regset s390_vxrs_high_regset = {
- s390_regmap_vxrs_high,
- regcache_supply_regset,
- regcache_collect_regset
- };
- const struct regset s390_gs_regset = {
- s390_regmap_gs,
- regcache_supply_regset,
- regcache_collect_regset
- };
- const struct regset s390_gsbc_regset = {
- s390_regmap_gsbc,
- regcache_supply_regset,
- regcache_collect_regset
- };
- /* Iterate over supported core file register note sections. */
- static void
- s390_iterate_over_regset_sections (struct gdbarch *gdbarch,
- iterate_over_regset_sections_cb *cb,
- void *cb_data,
- const struct regcache *regcache)
- {
- s390_gdbarch_tdep *tdep = (s390_gdbarch_tdep *) gdbarch_tdep (gdbarch);
- const int gregset_size = (tdep->abi == ABI_LINUX_S390 ?
- s390_sizeof_gregset : s390x_sizeof_gregset);
- cb (".reg", gregset_size, gregset_size, &s390_gregset, NULL, cb_data);
- cb (".reg2", s390_sizeof_fpregset, s390_sizeof_fpregset, &s390_fpregset, NULL,
- cb_data);
- if (tdep->abi == ABI_LINUX_S390 && tdep->gpr_full_regnum != -1)
- cb (".reg-s390-high-gprs", 16 * 4, 16 * 4, &s390_upper_regset,
- "s390 GPR upper halves", cb_data);
- if (tdep->have_linux_v1)
- cb (".reg-s390-last-break", 8, 8,
- (gdbarch_ptr_bit (gdbarch) == 32
- ? &s390_last_break_regset : &s390x_last_break_regset),
- "s390 last-break address", cb_data);
- if (tdep->have_linux_v2)
- cb (".reg-s390-system-call", 4, 4, &s390_system_call_regset,
- "s390 system-call", cb_data);
- /* If regcache is set, we are in "write" (gcore) mode. In this
- case, don't iterate over the TDB unless its registers are
- available. */
- if (tdep->have_tdb
- && (regcache == NULL
- || (REG_VALID
- == regcache->get_register_status (S390_TDB_DWORD0_REGNUM))))
- cb (".reg-s390-tdb", s390_sizeof_tdbregset, s390_sizeof_tdbregset,
- &s390_tdb_regset, "s390 TDB", cb_data);
- if (tdep->v0_full_regnum != -1)
- {
- cb (".reg-s390-vxrs-low", 16 * 8, 16 * 8, &s390_vxrs_low_regset,
- "s390 vector registers 0-15 lower half", cb_data);
- cb (".reg-s390-vxrs-high", 16 * 16, 16 * 16, &s390_vxrs_high_regset,
- "s390 vector registers 16-31", cb_data);
- }
- /* Iterate over the guarded-storage regsets if in "read" mode, or if
- their registers are available. */
- if (tdep->have_gs)
- {
- if (regcache == NULL
- || REG_VALID == regcache->get_register_status (S390_GSD_REGNUM))
- cb (".reg-s390-gs-cb", 4 * 8, 4 * 8, &s390_gs_regset,
- "s390 guarded-storage registers", cb_data);
- if (regcache == NULL
- || REG_VALID == regcache->get_register_status (S390_BC_GSD_REGNUM))
- cb (".reg-s390-gs-bc", 4 * 8, 4 * 8, &s390_gsbc_regset,
- "s390 guarded-storage broadcast control", cb_data);
- }
- }
- /* Implement core_read_description gdbarch method. */
- static const struct target_desc *
- s390_core_read_description (struct gdbarch *gdbarch,
- struct target_ops *target, bfd *abfd)
- {
- asection *section = bfd_get_section_by_name (abfd, ".reg");
- CORE_ADDR hwcap = linux_get_hwcap (target);
- bool high_gprs, v1, v2, te, vx, gs;
- if (!section)
- return NULL;
- high_gprs = (bfd_get_section_by_name (abfd, ".reg-s390-high-gprs")
- != NULL);
- v1 = (bfd_get_section_by_name (abfd, ".reg-s390-last-break") != NULL);
- v2 = (bfd_get_section_by_name (abfd, ".reg-s390-system-call") != NULL);
- vx = (hwcap & HWCAP_S390_VX);
- te = (hwcap & HWCAP_S390_TE);
- gs = (hwcap & HWCAP_S390_GS);
- switch (bfd_section_size (section))
- {
- case s390_sizeof_gregset:
- if (high_gprs)
- return (gs ? tdesc_s390_gs_linux64 :
- te && vx ? tdesc_s390_tevx_linux64 :
- vx ? tdesc_s390_vx_linux64 :
- te ? tdesc_s390_te_linux64 :
- v2 ? tdesc_s390_linux64v2 :
- v1 ? tdesc_s390_linux64v1 : tdesc_s390_linux64);
- else
- return (v2 ? tdesc_s390_linux32v2 :
- v1 ? tdesc_s390_linux32v1 : tdesc_s390_linux32);
- case s390x_sizeof_gregset:
- return (gs ? tdesc_s390x_gs_linux64 :
- te && vx ? tdesc_s390x_tevx_linux64 :
- vx ? tdesc_s390x_vx_linux64 :
- te ? tdesc_s390x_te_linux64 :
- v2 ? tdesc_s390x_linux64v2 :
- v1 ? tdesc_s390x_linux64v1 : tdesc_s390x_linux64);
- default:
- return NULL;
- }
- }
- /* Frame unwinding. */
- /* Signal trampoline stack frames. */
- struct s390_sigtramp_unwind_cache {
- CORE_ADDR frame_base;
- trad_frame_saved_reg *saved_regs;
- };
- /* Unwind THIS_FRAME and return the corresponding unwind cache for
- s390_sigtramp_frame_unwind. */
- static struct s390_sigtramp_unwind_cache *
- s390_sigtramp_frame_unwind_cache (struct frame_info *this_frame,
- void **this_prologue_cache)
- {
- struct gdbarch *gdbarch = get_frame_arch (this_frame);
- s390_gdbarch_tdep *tdep = (s390_gdbarch_tdep *) gdbarch_tdep (gdbarch);
- int word_size = gdbarch_ptr_bit (gdbarch) / 8;
- enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
- struct s390_sigtramp_unwind_cache *info;
- ULONGEST this_sp, prev_sp;
- CORE_ADDR next_ra, next_cfa, sigreg_ptr, sigreg_high_off;
- int i;
- if (*this_prologue_cache)
- return (struct s390_sigtramp_unwind_cache *) *this_prologue_cache;
- info = FRAME_OBSTACK_ZALLOC (struct s390_sigtramp_unwind_cache);
- *this_prologue_cache = info;
- info->saved_regs = trad_frame_alloc_saved_regs (this_frame);
- this_sp = get_frame_register_unsigned (this_frame, S390_SP_REGNUM);
- next_ra = get_frame_pc (this_frame);
- next_cfa = this_sp + 16*word_size + 32;
- /* New-style RT frame:
- retcode + alignment (8 bytes)
- siginfo (128 bytes)
- ucontext (contains sigregs at offset 5 words). */
- if (next_ra == next_cfa)
- {
- sigreg_ptr = next_cfa + 8 + 128 + align_up (5*word_size, 8);
- /* sigregs are followed by uc_sigmask (8 bytes), then by the
- upper GPR halves if present. */
- sigreg_high_off = 8;
- }
- /* Old-style RT frame and all non-RT frames:
- old signal mask (8 bytes)
- pointer to sigregs. */
- else
- {
- sigreg_ptr = read_memory_unsigned_integer (next_cfa + 8,
- word_size, byte_order);
- /* sigregs are followed by signo (4 bytes), then by the
- upper GPR halves if present. */
- sigreg_high_off = 4;
- }
- /* The sigregs structure looks like this:
- long psw_mask;
- long psw_addr;
- long gprs[16];
- int acrs[16];
- int fpc;
- int __pad;
- double fprs[16]; */
- /* PSW mask and address. */
- info->saved_regs[S390_PSWM_REGNUM].set_addr (sigreg_ptr);
- sigreg_ptr += word_size;
- info->saved_regs[S390_PSWA_REGNUM].set_addr (sigreg_ptr);
- sigreg_ptr += word_size;
- /* Then the GPRs. */
- for (i = 0; i < 16; i++)
- {
- info->saved_regs[S390_R0_REGNUM + i].set_addr (sigreg_ptr);
- sigreg_ptr += word_size;
- }
- /* Then the ACRs. */
- for (i = 0; i < 16; i++)
- {
- info->saved_regs[S390_A0_REGNUM + i].set_addr (sigreg_ptr);
- sigreg_ptr += 4;
- }
- /* The floating-point control word. */
- info->saved_regs[S390_FPC_REGNUM].set_addr (sigreg_ptr);
- sigreg_ptr += 8;
- /* And finally the FPRs. */
- for (i = 0; i < 16; i++)
- {
- info->saved_regs[S390_F0_REGNUM + i].set_addr (sigreg_ptr);
- sigreg_ptr += 8;
- }
- /* If we have them, the GPR upper halves are appended at the end. */
- sigreg_ptr += sigreg_high_off;
- if (tdep->gpr_full_regnum != -1)
- for (i = 0; i < 16; i++)
- {
- info->saved_regs[S390_R0_UPPER_REGNUM + i].set_addr (sigreg_ptr);
- sigreg_ptr += 4;
- }
- /* Restore the previous frame's SP. */
- prev_sp = read_memory_unsigned_integer (
- info->saved_regs[S390_SP_REGNUM].addr (),
- word_size, byte_order);
- /* Determine our frame base. */
- info->frame_base = prev_sp + 16*word_size + 32;
- return info;
- }
- /* Implement this_id frame_unwind method for s390_sigtramp_frame_unwind. */
- static void
- s390_sigtramp_frame_this_id (struct frame_info *this_frame,
- void **this_prologue_cache,
- struct frame_id *this_id)
- {
- struct s390_sigtramp_unwind_cache *info
- = s390_sigtramp_frame_unwind_cache (this_frame, this_prologue_cache);
- *this_id = frame_id_build (info->frame_base, get_frame_pc (this_frame));
- }
- /* Implement prev_register frame_unwind method for sigtramp frames. */
- static struct value *
- s390_sigtramp_frame_prev_register (struct frame_info *this_frame,
- void **this_prologue_cache, int regnum)
- {
- struct s390_sigtramp_unwind_cache *info
- = s390_sigtramp_frame_unwind_cache (this_frame, this_prologue_cache);
- return s390_trad_frame_prev_register (this_frame, info->saved_regs, regnum);
- }
- /* Implement sniffer frame_unwind method for sigtramp frames. */
- static int
- s390_sigtramp_frame_sniffer (const struct frame_unwind *self,
- struct frame_info *this_frame,
- void **this_prologue_cache)
- {
- CORE_ADDR pc = get_frame_pc (this_frame);
- bfd_byte sigreturn[2];
- if (target_read_memory (pc, sigreturn, 2))
- return 0;
- if (sigreturn[0] != op_svc)
- return 0;
- if (sigreturn[1] != 119 /* sigreturn */
- && sigreturn[1] != 173 /* rt_sigreturn */)
- return 0;
- return 1;
- }
- /* S390 sigtramp frame unwinder. */
- static const struct frame_unwind s390_sigtramp_frame_unwind = {
- "s390 linux sigtramp",
- SIGTRAMP_FRAME,
- default_frame_unwind_stop_reason,
- s390_sigtramp_frame_this_id,
- s390_sigtramp_frame_prev_register,
- NULL,
- s390_sigtramp_frame_sniffer
- };
- /* Syscall handling. */
- /* Retrieve the syscall number at a ptrace syscall-stop. Return -1
- upon error. */
- static LONGEST
- s390_linux_get_syscall_number (struct gdbarch *gdbarch,
- thread_info *thread)
- {
- struct regcache *regs = get_thread_regcache (thread);
- s390_gdbarch_tdep *tdep = (s390_gdbarch_tdep *) gdbarch_tdep (gdbarch);
- enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
- ULONGEST pc;
- ULONGEST svc_number = -1;
- unsigned opcode;
- /* Assume that the PC points after the 2-byte SVC instruction. We
- don't currently support SVC via EXECUTE. */
- regcache_cooked_read_unsigned (regs, tdep->pc_regnum, &pc);
- pc -= 2;
- opcode = read_memory_unsigned_integer ((CORE_ADDR) pc, 1, byte_order);
- if (opcode != op_svc)
- return -1;
- svc_number = read_memory_unsigned_integer ((CORE_ADDR) pc + 1, 1,
- byte_order);
- if (svc_number == 0)
- regcache_cooked_read_unsigned (regs, S390_R1_REGNUM, &svc_number);
- return svc_number;
- }
- /* Process record-replay */
- static struct linux_record_tdep s390_linux_record_tdep;
- static struct linux_record_tdep s390x_linux_record_tdep;
- /* Record all registers but PC register for process-record. */
- static int
- s390_all_but_pc_registers_record (struct regcache *regcache)
- {
- struct gdbarch *gdbarch = regcache->arch ();
- s390_gdbarch_tdep *tdep = (s390_gdbarch_tdep *) gdbarch_tdep (gdbarch);
- int i;
- for (i = 0; i < 16; i++)
- {
- if (record_full_arch_list_add_reg (regcache, S390_R0_REGNUM + i))
- return -1;
- if (record_full_arch_list_add_reg (regcache, S390_A0_REGNUM + i))
- return -1;
- if (record_full_arch_list_add_reg (regcache, S390_F0_REGNUM + i))
- return -1;
- if (tdep->gpr_full_regnum != -1)
- if (record_full_arch_list_add_reg (regcache, S390_R0_UPPER_REGNUM + i))
- return -1;
- if (tdep->v0_full_regnum != -1)
- {
- if (record_full_arch_list_add_reg (regcache, S390_V0_LOWER_REGNUM + i))
- return -1;
- if (record_full_arch_list_add_reg (regcache, S390_V16_REGNUM + i))
- return -1;
- }
- }
- if (record_full_arch_list_add_reg (regcache, S390_PSWM_REGNUM))
- return -1;
- if (record_full_arch_list_add_reg (regcache, S390_FPC_REGNUM))
- return -1;
- return 0;
- }
- /* Canonicalize system call SYSCALL belonging to ABI. Helper for
- s390_linux_syscall_record. */
- static enum gdb_syscall
- s390_canonicalize_syscall (int syscall, enum s390_abi_kind abi)
- {
- switch (syscall)
- {
- /* s390 syscall numbers < 222 are mostly the same as x86, so just list
- the exceptions. */
- case 0:
- return gdb_sys_no_syscall;
- case 7:
- return gdb_sys_restart_syscall;
- /* These syscalls work only on 31-bit. */
- case 13: /* time */
- case 16: /* lchown[16] */
- case 23: /* setuid[16] */
- case 24: /* getuid[16] */
- case 25: /* stime */
- case 46: /* setgid[16] */
- case 47: /* getgid[16] */
- case 49: /* seteuid[16] */
- case 50: /* getegid[16] */
- case 70: /* setreuid[16] */
- case 71: /* setregid[16] */
- case 76: /* [old_]getrlimit */
- case 80: /* getgroups[16] */
- case 81: /* setgroups[16] */
- case 95: /* fchown[16] */
- case 101: /* ioperm */
- case 138: /* setfsuid[16] */
- case 139: /* setfsgid[16] */
- case 140: /* _llseek */
- case 164: /* setresuid[16] */
- case 165: /* getresuid[16] */
- case 170: /* setresgid[16] */
- case 171: /* getresgid[16] */
- case 182: /* chown[16] */
- case 192: /* mmap2 */
- case 193: /* truncate64 */
- case 194: /* ftruncate64 */
- case 195: /* stat64 */
- case 196: /* lstat64 */
- case 197: /* fstat64 */
- case 221: /* fcntl64 */
- if (abi == ABI_LINUX_S390)
- return (enum gdb_syscall) syscall;
- return gdb_sys_no_syscall;
- /* These syscalls don't exist on s390. */
- case 17: /* break */
- case 18: /* oldstat */
- case 28: /* oldfstat */
- case 31: /* stty */
- case 32: /* gtty */
- case 35: /* ftime */
- case 44: /* prof */
- case 53: /* lock */
- case 56: /* mpx */
- case 58: /* ulimit */
- case 59: /* oldolduname */
- case 68: /* sgetmask */
- case 69: /* ssetmask */
- case 82: /* [old_]select */
- case 84: /* oldlstat */
- case 98: /* profil */
- case 109: /* olduname */
- case 113: /* vm86old */
- case 123: /* modify_ldt */
- case 166: /* vm86 */
- return gdb_sys_no_syscall;
- case 110:
- return gdb_sys_lookup_dcookie;
- /* Here come the differences. */
- case 222:
- return gdb_sys_readahead;
- case 223:
- if (abi == ABI_LINUX_S390)
- return gdb_sys_sendfile64;
- return gdb_sys_no_syscall;
- /* 224-235 handled below */
- case 236:
- return gdb_sys_gettid;
- case 237:
- return gdb_sys_tkill;
- case 238:
- return gdb_sys_futex;
- case 239:
- return gdb_sys_sched_setaffinity;
- case 240:
- return gdb_sys_sched_getaffinity;
- case 241:
- return gdb_sys_tgkill;
- /* 242 reserved */
- case 243:
- return gdb_sys_io_setup;
- case 244:
- return gdb_sys_io_destroy;
- case 245:
- return gdb_sys_io_getevents;
- case 246:
- return gdb_sys_io_submit;
- case 247:
- return gdb_sys_io_cancel;
- case 248:
- return gdb_sys_exit_group;
- case 249:
- return gdb_sys_epoll_create;
- case 250:
- return gdb_sys_epoll_ctl;
- case 251:
- return gdb_sys_epoll_wait;
- case 252:
- return gdb_sys_set_tid_address;
- case 253:
- return gdb_sys_fadvise64;
- /* 254-262 handled below */
- /* 263 reserved */
- case 264:
- if (abi == ABI_LINUX_S390)
- return gdb_sys_fadvise64_64;
- return gdb_sys_no_syscall;
- case 265:
- return gdb_sys_statfs64;
- case 266:
- return gdb_sys_fstatfs64;
- case 267:
- return gdb_sys_remap_file_pages;
- /* 268-270 reserved */
- /* 271-277 handled below */
- case 278:
- return gdb_sys_add_key;
- case 279:
- return gdb_sys_request_key;
- case 280:
- return gdb_sys_keyctl;
- case 281:
- return gdb_sys_waitid;
- /* 282-312 handled below */
- case 293:
- if (abi == ABI_LINUX_S390)
- return gdb_sys_fstatat64;
- return gdb_sys_newfstatat;
- /* 313+ not yet supported */
- default:
- {
- int ret;
- /* Most "old" syscalls copied from i386. */
- if (syscall <= 221)
- ret = syscall;
- /* xattr syscalls. */
- else if (syscall >= 224 && syscall <= 235)
- ret = syscall + 2;
- /* timer syscalls. */
- else if (syscall >= 254 && syscall <= 262)
- ret = syscall + 5;
- /* mq_* and kexec_load */
- else if (syscall >= 271 && syscall <= 277)
- ret = syscall + 6;
- /* ioprio_set .. epoll_pwait */
- else if (syscall >= 282 && syscall <= 312)
- ret = syscall + 7;
- else
- ret = gdb_sys_no_syscall;
- return (enum gdb_syscall) ret;
- }
- }
- }
- /* Record a system call. Returns 0 on success, -1 otherwise.
- Helper function for s390_process_record. */
- static int
- s390_linux_syscall_record (struct regcache *regcache, LONGEST syscall_native)
- {
- struct gdbarch *gdbarch = regcache->arch ();
- s390_gdbarch_tdep *tdep = (s390_gdbarch_tdep *) gdbarch_tdep (gdbarch);
- int ret;
- enum gdb_syscall syscall_gdb;
- /* On s390, syscall number can be passed either as immediate field of svc
- instruction, or in %r1 (with svc 0). */
- if (syscall_native == 0)
- regcache_raw_read_signed (regcache, S390_R1_REGNUM, &syscall_native);
- syscall_gdb = s390_canonicalize_syscall (syscall_native, tdep->abi);
- if (syscall_gdb < 0)
- {
- gdb_printf (gdb_stderr,
- _("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 (s390_all_but_pc_registers_record (regcache))
- return -1;
- return 0;
- }
- if (tdep->abi == ABI_LINUX_ZSERIES)
- ret = record_linux_system_call (syscall_gdb, regcache,
- &s390x_linux_record_tdep);
- else
- ret = record_linux_system_call (syscall_gdb, regcache,
- &s390_linux_record_tdep);
- if (ret)
- return ret;
- /* Record the return value of the system call. */
- if (record_full_arch_list_add_reg (regcache, S390_R2_REGNUM))
- return -1;
- return 0;
- }
- /* Implement process_record_signal gdbarch method. */
- static int
- s390_linux_record_signal (struct gdbarch *gdbarch, struct regcache *regcache,
- enum gdb_signal signal)
- {
- s390_gdbarch_tdep *tdep = (s390_gdbarch_tdep *) gdbarch_tdep (gdbarch);
- /* There are two kinds of signal frames on s390. rt_sigframe is always
- the larger one, so don't even bother with sigframe. */
- const int sizeof_rt_sigframe = (tdep->abi == ABI_LINUX_ZSERIES ?
- 160 + 8 + 128 + 1024 : 96 + 8 + 128 + 1000);
- ULONGEST sp;
- int i;
- for (i = 0; i < 16; i++)
- {
- if (record_full_arch_list_add_reg (regcache, S390_R0_REGNUM + i))
- return -1;
- if (tdep->gpr_full_regnum != -1)
- if (record_full_arch_list_add_reg (regcache, S390_R0_UPPER_REGNUM + i))
- return -1;
- }
- if (record_full_arch_list_add_reg (regcache, S390_PSWA_REGNUM))
- return -1;
- if (record_full_arch_list_add_reg (regcache, S390_PSWM_REGNUM))
- return -1;
- /* Record the change in the stack.
- frame-size = sizeof (struct rt_sigframe) + SIGNAL_FRAMESIZE */
- regcache_raw_read_unsigned (regcache, S390_SP_REGNUM, &sp);
- sp -= sizeof_rt_sigframe;
- if (record_full_arch_list_add_mem (sp, sizeof_rt_sigframe))
- return -1;
- if (record_full_arch_list_add_end ())
- return -1;
- return 0;
- }
- /* Initialize linux_record_tdep if not initialized yet. */
- static void
- s390_init_linux_record_tdep (struct linux_record_tdep *record_tdep,
- enum s390_abi_kind abi)
- {
- /* These values are the size of the type that will be used in a system
- call. They are obtained from Linux Kernel source. */
- if (abi == ABI_LINUX_ZSERIES)
- {
- record_tdep->size_pointer = 8;
- /* no _old_kernel_stat */
- record_tdep->size_tms = 32;
- record_tdep->size_loff_t = 8;
- record_tdep->size_flock = 32;
- record_tdep->size_ustat = 32;
- record_tdep->size_old_sigaction = 32;
- record_tdep->size_old_sigset_t = 8;
- record_tdep->size_rlimit = 16;
- record_tdep->size_rusage = 144;
- record_tdep->size_timeval = 16;
- record_tdep->size_timezone = 8;
- /* old_[ug]id_t never used */
- record_tdep->size_fd_set = 128;
- record_tdep->size_old_dirent = 280;
- record_tdep->size_statfs = 88;
- record_tdep->size_statfs64 = 88;
- record_tdep->size_sockaddr = 16;
- record_tdep->size_int = 4;
- record_tdep->size_long = 8;
- record_tdep->size_ulong = 8;
- record_tdep->size_msghdr = 56;
- record_tdep->size_itimerval = 32;
- record_tdep->size_stat = 144;
- /* old_utsname unused */
- record_tdep->size_sysinfo = 112;
- record_tdep->size_msqid_ds = 120;
- record_tdep->size_shmid_ds = 112;
- record_tdep->size_new_utsname = 390;
- record_tdep->size_timex = 208;
- record_tdep->size_mem_dqinfo = 24;
- record_tdep->size_if_dqblk = 72;
- record_tdep->size_fs_quota_stat = 80;
- record_tdep->size_timespec = 16;
- record_tdep->size_pollfd = 8;
- record_tdep->size_NFS_FHSIZE = 32;
- record_tdep->size_knfsd_fh = 132;
- record_tdep->size_TASK_COMM_LEN = 16;
- record_tdep->size_sigaction = 32;
- record_tdep->size_sigset_t = 8;
- record_tdep->size_siginfo_t = 128;
- record_tdep->size_cap_user_data_t = 12;
- record_tdep->size_stack_t = 24;
- record_tdep->size_off_t = 8;
- /* stat64 unused */
- record_tdep->size_gid_t = 4;
- record_tdep->size_uid_t = 4;
- record_tdep->size_PAGE_SIZE = 0x1000; /* 4KB */
- record_tdep->size_flock64 = 32;
- record_tdep->size_io_event = 32;
- record_tdep->size_iocb = 64;
- record_tdep->size_epoll_event = 16;
- record_tdep->size_itimerspec = 32;
- record_tdep->size_mq_attr = 64;
- record_tdep->size_termios = 36;
- record_tdep->size_termios2 = 44;
- record_tdep->size_pid_t = 4;
- record_tdep->size_winsize = 8;
- record_tdep->size_serial_struct = 72;
- record_tdep->size_serial_icounter_struct = 80;
- record_tdep->size_size_t = 8;
- record_tdep->size_iovec = 16;
- record_tdep->size_time_t = 8;
- }
- else if (abi == ABI_LINUX_S390)
- {
- record_tdep->size_pointer = 4;
- record_tdep->size__old_kernel_stat = 32;
- record_tdep->size_tms = 16;
- record_tdep->size_loff_t = 8;
- record_tdep->size_flock = 16;
- record_tdep->size_ustat = 20;
- record_tdep->size_old_sigaction = 16;
- record_tdep->size_old_sigset_t = 4;
- record_tdep->size_rlimit = 8;
- record_tdep->size_rusage = 72;
- record_tdep->size_timeval = 8;
- record_tdep->size_timezone = 8;
- record_tdep->size_old_gid_t = 2;
- record_tdep->size_old_uid_t = 2;
- record_tdep->size_fd_set = 128;
- record_tdep->size_old_dirent = 268;
- record_tdep->size_statfs = 64;
- record_tdep->size_statfs64 = 88;
- record_tdep->size_sockaddr = 16;
- record_tdep->size_int = 4;
- record_tdep->size_long = 4;
- record_tdep->size_ulong = 4;
- record_tdep->size_msghdr = 28;
- record_tdep->size_itimerval = 16;
- record_tdep->size_stat = 64;
- /* old_utsname unused */
- record_tdep->size_sysinfo = 64;
- record_tdep->size_msqid_ds = 88;
- record_tdep->size_shmid_ds = 84;
- record_tdep->size_new_utsname = 390;
- record_tdep->size_timex = 128;
- record_tdep->size_mem_dqinfo = 24;
- record_tdep->size_if_dqblk = 72;
- record_tdep->size_fs_quota_stat = 80;
- record_tdep->size_timespec = 8;
- record_tdep->size_pollfd = 8;
- record_tdep->size_NFS_FHSIZE = 32;
- record_tdep->size_knfsd_fh = 132;
- record_tdep->size_TASK_COMM_LEN = 16;
- record_tdep->size_sigaction = 20;
- record_tdep->size_sigset_t = 8;
- record_tdep->size_siginfo_t = 128;
- record_tdep->size_cap_user_data_t = 12;
- record_tdep->size_stack_t = 12;
- record_tdep->size_off_t = 4;
- record_tdep->size_stat64 = 104;
- record_tdep->size_gid_t = 4;
- record_tdep->size_uid_t = 4;
- record_tdep->size_PAGE_SIZE = 0x1000; /* 4KB */
- record_tdep->size_flock64 = 32;
- record_tdep->size_io_event = 32;
- record_tdep->size_iocb = 64;
- record_tdep->size_epoll_event = 16;
- record_tdep->size_itimerspec = 16;
- record_tdep->size_mq_attr = 32;
- record_tdep->size_termios = 36;
- record_tdep->size_termios2 = 44;
- record_tdep->size_pid_t = 4;
- record_tdep->size_winsize = 8;
- record_tdep->size_serial_struct = 60;
- record_tdep->size_serial_icounter_struct = 80;
- record_tdep->size_size_t = 4;
- record_tdep->size_iovec = 8;
- record_tdep->size_time_t = 4;
- }
- /* These values are the second argument of system call "sys_fcntl"
- and "sys_fcntl64". They are obtained from Linux Kernel source. */
- record_tdep->fcntl_F_GETLK = 5;
- record_tdep->fcntl_F_GETLK64 = 12;
- record_tdep->fcntl_F_SETLK64 = 13;
- record_tdep->fcntl_F_SETLKW64 = 14;
- record_tdep->arg1 = S390_R2_REGNUM;
- record_tdep->arg2 = S390_R3_REGNUM;
- record_tdep->arg3 = S390_R4_REGNUM;
- record_tdep->arg4 = S390_R5_REGNUM;
- record_tdep->arg5 = S390_R6_REGNUM;
- /* These values are the second argument of system call "sys_ioctl".
- They are obtained from Linux Kernel source.
- See arch/s390/include/uapi/asm/ioctls.h. */
- record_tdep->ioctl_TCGETS = 0x5401;
- record_tdep->ioctl_TCSETS = 0x5402;
- record_tdep->ioctl_TCSETSW = 0x5403;
- record_tdep->ioctl_TCSETSF = 0x5404;
- record_tdep->ioctl_TCGETA = 0x5405;
- record_tdep->ioctl_TCSETA = 0x5406;
- record_tdep->ioctl_TCSETAW = 0x5407;
- record_tdep->ioctl_TCSETAF = 0x5408;
- record_tdep->ioctl_TCSBRK = 0x5409;
- record_tdep->ioctl_TCXONC = 0x540a;
- record_tdep->ioctl_TCFLSH = 0x540b;
- record_tdep->ioctl_TIOCEXCL = 0x540c;
- record_tdep->ioctl_TIOCNXCL = 0x540d;
- record_tdep->ioctl_TIOCSCTTY = 0x540e;
- record_tdep->ioctl_TIOCGPGRP = 0x540f;
- record_tdep->ioctl_TIOCSPGRP = 0x5410;
- record_tdep->ioctl_TIOCOUTQ = 0x5411;
- record_tdep->ioctl_TIOCSTI = 0x5412;
- record_tdep->ioctl_TIOCGWINSZ = 0x5413;
- record_tdep->ioctl_TIOCSWINSZ = 0x5414;
- record_tdep->ioctl_TIOCMGET = 0x5415;
- record_tdep->ioctl_TIOCMBIS = 0x5416;
- record_tdep->ioctl_TIOCMBIC = 0x5417;
- record_tdep->ioctl_TIOCMSET = 0x5418;
- record_tdep->ioctl_TIOCGSOFTCAR = 0x5419;
- record_tdep->ioctl_TIOCSSOFTCAR = 0x541a;
- record_tdep->ioctl_FIONREAD = 0x541b;
- record_tdep->ioctl_TIOCINQ = 0x541b; /* alias */
- record_tdep->ioctl_TIOCLINUX = 0x541c;
- record_tdep->ioctl_TIOCCONS = 0x541d;
- record_tdep->ioctl_TIOCGSERIAL = 0x541e;
- record_tdep->ioctl_TIOCSSERIAL = 0x541f;
- record_tdep->ioctl_TIOCPKT = 0x5420;
- record_tdep->ioctl_FIONBIO = 0x5421;
- record_tdep->ioctl_TIOCNOTTY = 0x5422;
- record_tdep->ioctl_TIOCSETD = 0x5423;
- record_tdep->ioctl_TIOCGETD = 0x5424;
- record_tdep->ioctl_TCSBRKP = 0x5425;
- record_tdep->ioctl_TIOCSBRK = 0x5427;
- record_tdep->ioctl_TIOCCBRK = 0x5428;
- record_tdep->ioctl_TIOCGSID = 0x5429;
- record_tdep->ioctl_TCGETS2 = 0x802c542a;
- record_tdep->ioctl_TCSETS2 = 0x402c542b;
- record_tdep->ioctl_TCSETSW2 = 0x402c542c;
- record_tdep->ioctl_TCSETSF2 = 0x402c542d;
- record_tdep->ioctl_TIOCGPTN = 0x80045430;
- record_tdep->ioctl_TIOCSPTLCK = 0x40045431;
- record_tdep->ioctl_FIONCLEX = 0x5450;
- record_tdep->ioctl_FIOCLEX = 0x5451;
- record_tdep->ioctl_FIOASYNC = 0x5452;
- record_tdep->ioctl_TIOCSERCONFIG = 0x5453;
- record_tdep->ioctl_TIOCSERGWILD = 0x5454;
- record_tdep->ioctl_TIOCSERSWILD = 0x5455;
- record_tdep->ioctl_TIOCGLCKTRMIOS = 0x5456;
- record_tdep->ioctl_TIOCSLCKTRMIOS = 0x5457;
- record_tdep->ioctl_TIOCSERGSTRUCT = 0x5458;
- record_tdep->ioctl_TIOCSERGETLSR = 0x5459;
- record_tdep->ioctl_TIOCSERGETMULTI = 0x545a;
- record_tdep->ioctl_TIOCSERSETMULTI = 0x545b;
- record_tdep->ioctl_TIOCMIWAIT = 0x545c;
- record_tdep->ioctl_TIOCGICOUNT = 0x545d;
- record_tdep->ioctl_FIOQSIZE = 0x545e;
- }
- /* Initialize OSABI common for GNU/Linux on 31- and 64-bit systems. */
- static void
- s390_linux_init_abi_any (struct gdbarch_info info, struct gdbarch *gdbarch)
- {
- s390_gdbarch_tdep *tdep = (s390_gdbarch_tdep *) gdbarch_tdep (gdbarch);
- tdep->s390_syscall_record = s390_linux_syscall_record;
- linux_init_abi (info, gdbarch, 1);
- /* Register handling. */
- set_gdbarch_core_read_description (gdbarch, s390_core_read_description);
- set_gdbarch_iterate_over_regset_sections (gdbarch,
- s390_iterate_over_regset_sections);
- set_gdbarch_write_pc (gdbarch, s390_write_pc);
- set_gdbarch_cannot_store_register (gdbarch, s390_cannot_store_register);
- /* Syscall handling. */
- set_gdbarch_get_syscall_number (gdbarch, s390_linux_get_syscall_number);
- /* Frame handling. */
- frame_unwind_append_unwinder (gdbarch, &s390_sigtramp_frame_unwind);
- set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
- /* Enable TLS support. */
- set_gdbarch_fetch_tls_load_module_address (gdbarch,
- svr4_fetch_objfile_link_map);
- /* Support reverse debugging. */
- set_gdbarch_process_record_signal (gdbarch, s390_linux_record_signal);
- s390_init_linux_record_tdep (&s390_linux_record_tdep, ABI_LINUX_S390);
- s390_init_linux_record_tdep (&s390x_linux_record_tdep, ABI_LINUX_ZSERIES);
- }
- /* Initialize OSABI for GNU/Linux on 31-bit systems. */
- static void
- s390_linux_init_abi_31 (struct gdbarch_info info, struct gdbarch *gdbarch)
- {
- s390_gdbarch_tdep *tdep = (s390_gdbarch_tdep *) gdbarch_tdep (gdbarch);
- tdep->abi = ABI_LINUX_S390;
- s390_linux_init_abi_any (info, gdbarch);
- set_solib_svr4_fetch_link_map_offsets (gdbarch,
- linux_ilp32_fetch_link_map_offsets);
- set_xml_syscall_file_name (gdbarch, XML_SYSCALL_FILENAME_S390);
- }
- /* Initialize OSABI for GNU/Linux on 64-bit systems. */
- static void
- s390_linux_init_abi_64 (struct gdbarch_info info, struct gdbarch *gdbarch)
- {
- s390_gdbarch_tdep *tdep = (s390_gdbarch_tdep *) gdbarch_tdep (gdbarch);
- tdep->abi = ABI_LINUX_ZSERIES;
- s390_linux_init_abi_any (info, gdbarch);
- set_solib_svr4_fetch_link_map_offsets (gdbarch,
- linux_lp64_fetch_link_map_offsets);
- set_xml_syscall_file_name (gdbarch, XML_SYSCALL_FILENAME_S390X);
- }
- void _initialize_s390_linux_tdep ();
- void
- _initialize_s390_linux_tdep ()
- {
- /* Hook us into the OSABI mechanism. */
- gdbarch_register_osabi (bfd_arch_s390, bfd_mach_s390_31, GDB_OSABI_LINUX,
- s390_linux_init_abi_31);
- gdbarch_register_osabi (bfd_arch_s390, bfd_mach_s390_64, GDB_OSABI_LINUX,
- s390_linux_init_abi_64);
- /* Initialize the GNU/Linux target descriptions. */
- initialize_tdesc_s390_linux32v1 ();
- initialize_tdesc_s390_linux32v2 ();
- initialize_tdesc_s390_linux64 ();
- initialize_tdesc_s390_linux64v1 ();
- initialize_tdesc_s390_linux64v2 ();
- initialize_tdesc_s390_te_linux64 ();
- initialize_tdesc_s390_vx_linux64 ();
- initialize_tdesc_s390_tevx_linux64 ();
- initialize_tdesc_s390_gs_linux64 ();
- initialize_tdesc_s390x_linux64v1 ();
- initialize_tdesc_s390x_linux64v2 ();
- initialize_tdesc_s390x_te_linux64 ();
- initialize_tdesc_s390x_vx_linux64 ();
- initialize_tdesc_s390x_tevx_linux64 ();
- initialize_tdesc_s390x_gs_linux64 ();
- }
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