diff options
Diffstat (limited to 'gdb/riscv-linux-tdep.c')
| -rw-r--r-- | gdb/riscv-linux-tdep.c | 335 |
1 files changed, 335 insertions, 0 deletions
diff --git a/gdb/riscv-linux-tdep.c b/gdb/riscv-linux-tdep.c index 4c0c65c..e1ea615 100644 --- a/gdb/riscv-linux-tdep.c +++ b/gdb/riscv-linux-tdep.c @@ -20,11 +20,18 @@ #include "osabi.h" #include "glibc-tdep.h" #include "linux-tdep.h" +#include "svr4-tls-tdep.h" #include "solib-svr4.h" #include "regset.h" #include "tramp-frame.h" #include "trad-frame.h" #include "gdbarch.h" +#include "record-full.h" +#include "linux-record.h" +#include "riscv-linux-tdep.h" +#include "inferior.h" + +extern unsigned int record_debug; /* The following value is derived from __NR_rt_sigreturn in <include/uapi/asm-generic/unistd.h> from the Linux source tree. */ @@ -173,6 +180,327 @@ riscv_linux_syscall_next_pc (const frame_info_ptr &frame) return pc + 4 /* Length of the ECALL insn. */; } +/* RISC-V process record-replay constructs: syscall, signal etc. */ + +static linux_record_tdep riscv_linux_record_tdep; + +using regnum_type = int; + +/* Record registers from first to last for process-record. */ + +static bool +save_registers (struct regcache *regcache, regnum_type first, regnum_type last) +{ + gdb_assert (regcache != nullptr); + + for (regnum_type i = first; i != last; ++i) + if (record_full_arch_list_add_reg (regcache, i)) + return false; + return true; +}; + +/* Record all registers but PC register for process-record. */ + +static bool +riscv_all_but_pc_registers_record (struct regcache *regcache) +{ + gdb_assert (regcache != nullptr); + + struct gdbarch *gdbarch = regcache->arch (); + riscv_gdbarch_tdep *tdep = gdbarch_tdep<riscv_gdbarch_tdep> (gdbarch); + const struct riscv_gdbarch_features &features = tdep->isa_features; + + if (!save_registers (regcache, RISCV_ZERO_REGNUM + 1, RISCV_PC_REGNUM)) + return false; + + if (features.flen + && !save_registers (regcache, RISCV_FIRST_FP_REGNUM, + RISCV_LAST_FP_REGNUM + 1)) + return false; + + return true; +} + +/* Handler for riscv system call instruction recording. */ + +static int +riscv_linux_syscall_record (struct regcache *regcache, + unsigned long svc_number) +{ + gdb_assert (regcache != nullptr); + + enum gdb_syscall syscall_gdb = riscv64_canonicalize_syscall (svc_number); + + if (record_debug > 1) + gdb_printf (gdb_stdlog, "Made syscall %s.\n", plongest (svc_number)); + + if (syscall_gdb == gdb_sys_no_syscall) + { + warning (_("Process record and replay target doesn't " + "support syscall number %s\n"), plongest (svc_number)); + return -1; + } + + if (syscall_gdb == gdb_sys_sigreturn || syscall_gdb == gdb_sys_rt_sigreturn) + { + if (!riscv_all_but_pc_registers_record (regcache)) + return -1; + return 0; + } + + int ret = record_linux_system_call (syscall_gdb, regcache, + &riscv_linux_record_tdep); + if (ret != 0) + return ret; + + /* Record the return value of the system call. */ + if (record_full_arch_list_add_reg (regcache, RISCV_A0_REGNUM)) + return -1; + + return 0; +} + +/* Initialize the riscv64_linux_record_tdep. */ + +static void +riscv64_linux_record_tdep_init (struct gdbarch *gdbarch, + struct linux_record_tdep & + riscv_linux_record_tdep) +{ + gdb_assert (gdbarch != nullptr); + + /* These values are the size of the type that + will be used in a system call. */ + riscv_linux_record_tdep.size_pointer + = gdbarch_ptr_bit (gdbarch) / TARGET_CHAR_BIT; + riscv_linux_record_tdep.size__old_kernel_stat = 48; + riscv_linux_record_tdep.size_tms = 32; + riscv_linux_record_tdep.size_loff_t = 8; + riscv_linux_record_tdep.size_flock = 32; + riscv_linux_record_tdep.size_oldold_utsname = 45; + riscv_linux_record_tdep.size_ustat = 32; + riscv_linux_record_tdep.size_old_sigaction = 32; + riscv_linux_record_tdep.size_old_sigset_t = 8; + riscv_linux_record_tdep.size_rlimit = 16; + riscv_linux_record_tdep.size_rusage = 144; + riscv_linux_record_tdep.size_timeval = 8; + riscv_linux_record_tdep.size_timezone = 8; + riscv_linux_record_tdep.size_old_gid_t = 2; + riscv_linux_record_tdep.size_old_uid_t = 2; + riscv_linux_record_tdep.size_fd_set = 128; + riscv_linux_record_tdep.size_old_dirent = 268; + riscv_linux_record_tdep.size_statfs = 120; + riscv_linux_record_tdep.size_statfs64 = 120; + riscv_linux_record_tdep.size_sockaddr = 16; + riscv_linux_record_tdep.size_int + = gdbarch_int_bit (gdbarch) / TARGET_CHAR_BIT; + riscv_linux_record_tdep.size_long + = gdbarch_long_bit (gdbarch) / TARGET_CHAR_BIT; + riscv_linux_record_tdep.size_ulong + = gdbarch_long_bit (gdbarch) / TARGET_CHAR_BIT; + riscv_linux_record_tdep.size_msghdr = 104; + riscv_linux_record_tdep.size_itimerval = 16; + riscv_linux_record_tdep.size_stat = 128; + riscv_linux_record_tdep.size_old_utsname = 325; + riscv_linux_record_tdep.size_sysinfo = 112; + riscv_linux_record_tdep.size_msqid_ds = 104; + riscv_linux_record_tdep.size_shmid_ds = 88; + riscv_linux_record_tdep.size_new_utsname = 390; + riscv_linux_record_tdep.size_timex = 188; + riscv_linux_record_tdep.size_mem_dqinfo = 72; + riscv_linux_record_tdep.size_if_dqblk = 68; + riscv_linux_record_tdep.size_fs_quota_stat = 64; + riscv_linux_record_tdep.size_timespec = 16; + riscv_linux_record_tdep.size_pollfd = 8; + riscv_linux_record_tdep.size_NFS_FHSIZE = 32; + riscv_linux_record_tdep.size_knfsd_fh = 36; + riscv_linux_record_tdep.size_TASK_COMM_LEN = 4; + riscv_linux_record_tdep.size_sigaction = 24; + riscv_linux_record_tdep.size_sigset_t = 8; + riscv_linux_record_tdep.size_siginfo_t = 128; + riscv_linux_record_tdep.size_cap_user_data_t = 8; + riscv_linux_record_tdep.size_stack_t = 24; + riscv_linux_record_tdep.size_off_t = riscv_linux_record_tdep.size_long; + riscv_linux_record_tdep.size_stat64 = 136; + riscv_linux_record_tdep.size_gid_t = 4; + riscv_linux_record_tdep.size_uid_t = 4; + riscv_linux_record_tdep.size_PAGE_SIZE = 4096; + riscv_linux_record_tdep.size_flock64 = 32; + riscv_linux_record_tdep.size_user_desc = 37; + riscv_linux_record_tdep.size_io_event = 32; + riscv_linux_record_tdep.size_iocb = 64; + riscv_linux_record_tdep.size_epoll_event = 16; + riscv_linux_record_tdep.size_itimerspec + = riscv_linux_record_tdep.size_timespec * 2; + riscv_linux_record_tdep.size_mq_attr = 64; + riscv_linux_record_tdep.size_termios = 36; + riscv_linux_record_tdep.size_termios2 = 44; + riscv_linux_record_tdep.size_pid_t = 4; + riscv_linux_record_tdep.size_winsize = 8; + riscv_linux_record_tdep.size_serial_struct = 72; + riscv_linux_record_tdep.size_serial_icounter_struct = 80; + riscv_linux_record_tdep.size_hayes_esp_config = 12; + riscv_linux_record_tdep.size_size_t = 8; + riscv_linux_record_tdep.size_iovec = 16; + riscv_linux_record_tdep.size_time_t = 8; + + /* These values are the second argument of system call "sys_ioctl". + They are obtained from Linux Kernel source. */ + riscv_linux_record_tdep.ioctl_TCGETS = 0x5401; + riscv_linux_record_tdep.ioctl_TCSETS = 0x5402; + riscv_linux_record_tdep.ioctl_TCSETSW = 0x5403; + riscv_linux_record_tdep.ioctl_TCSETSF = 0x5404; + riscv_linux_record_tdep.ioctl_TCGETA = 0x5405; + riscv_linux_record_tdep.ioctl_TCSETA = 0x5406; + riscv_linux_record_tdep.ioctl_TCSETAW = 0x5407; + riscv_linux_record_tdep.ioctl_TCSETAF = 0x5408; + riscv_linux_record_tdep.ioctl_TCSBRK = 0x5409; + riscv_linux_record_tdep.ioctl_TCXONC = 0x540a; + riscv_linux_record_tdep.ioctl_TCFLSH = 0x540b; + riscv_linux_record_tdep.ioctl_TIOCEXCL = 0x540c; + riscv_linux_record_tdep.ioctl_TIOCNXCL = 0x540d; + riscv_linux_record_tdep.ioctl_TIOCSCTTY = 0x540e; + riscv_linux_record_tdep.ioctl_TIOCGPGRP = 0x540f; + riscv_linux_record_tdep.ioctl_TIOCSPGRP = 0x5410; + riscv_linux_record_tdep.ioctl_TIOCOUTQ = 0x5411; + riscv_linux_record_tdep.ioctl_TIOCSTI = 0x5412; + riscv_linux_record_tdep.ioctl_TIOCGWINSZ = 0x5413; + riscv_linux_record_tdep.ioctl_TIOCSWINSZ = 0x5414; + riscv_linux_record_tdep.ioctl_TIOCMGET = 0x5415; + riscv_linux_record_tdep.ioctl_TIOCMBIS = 0x5416; + riscv_linux_record_tdep.ioctl_TIOCMBIC = 0x5417; + riscv_linux_record_tdep.ioctl_TIOCMSET = 0x5418; + riscv_linux_record_tdep.ioctl_TIOCGSOFTCAR = 0x5419; + riscv_linux_record_tdep.ioctl_TIOCSSOFTCAR = 0x541a; + riscv_linux_record_tdep.ioctl_FIONREAD = 0x541b; + riscv_linux_record_tdep.ioctl_TIOCINQ + = riscv_linux_record_tdep.ioctl_FIONREAD; + riscv_linux_record_tdep.ioctl_TIOCLINUX = 0x541c; + riscv_linux_record_tdep.ioctl_TIOCCONS = 0x541d; + riscv_linux_record_tdep.ioctl_TIOCGSERIAL = 0x541e; + riscv_linux_record_tdep.ioctl_TIOCSSERIAL = 0x541f; + riscv_linux_record_tdep.ioctl_TIOCPKT = 0x5420; + riscv_linux_record_tdep.ioctl_FIONBIO = 0x5421; + riscv_linux_record_tdep.ioctl_TIOCNOTTY = 0x5422; + riscv_linux_record_tdep.ioctl_TIOCSETD = 0x5423; + riscv_linux_record_tdep.ioctl_TIOCGETD = 0x5424; + riscv_linux_record_tdep.ioctl_TCSBRKP = 0x5425; + riscv_linux_record_tdep.ioctl_TIOCTTYGSTRUCT = 0x5426; + riscv_linux_record_tdep.ioctl_TIOCSBRK = 0x5427; + riscv_linux_record_tdep.ioctl_TIOCCBRK = 0x5428; + riscv_linux_record_tdep.ioctl_TIOCGSID = 0x5429; + riscv_linux_record_tdep.ioctl_TCGETS2 = 0x802c542a; + riscv_linux_record_tdep.ioctl_TCSETS2 = 0x402c542b; + riscv_linux_record_tdep.ioctl_TCSETSW2 = 0x402c542c; + riscv_linux_record_tdep.ioctl_TCSETSF2 = 0x402c542d; + riscv_linux_record_tdep.ioctl_TIOCGPTN = 0x80045430; + riscv_linux_record_tdep.ioctl_TIOCSPTLCK = 0x40045431; + riscv_linux_record_tdep.ioctl_FIONCLEX = 0x5450; + riscv_linux_record_tdep.ioctl_FIOCLEX = 0x5451; + riscv_linux_record_tdep.ioctl_FIOASYNC = 0x5452; + riscv_linux_record_tdep.ioctl_TIOCSERCONFIG = 0x5453; + riscv_linux_record_tdep.ioctl_TIOCSERGWILD = 0x5454; + riscv_linux_record_tdep.ioctl_TIOCSERSWILD = 0x5455; + riscv_linux_record_tdep.ioctl_TIOCGLCKTRMIOS = 0x5456; + riscv_linux_record_tdep.ioctl_TIOCSLCKTRMIOS = 0x5457; + riscv_linux_record_tdep.ioctl_TIOCSERGSTRUCT = 0x5458; + riscv_linux_record_tdep.ioctl_TIOCSERGETLSR = 0x5459; + riscv_linux_record_tdep.ioctl_TIOCSERGETMULTI = 0x545a; + riscv_linux_record_tdep.ioctl_TIOCSERSETMULTI = 0x545b; + riscv_linux_record_tdep.ioctl_TIOCMIWAIT = 0x545c; + riscv_linux_record_tdep.ioctl_TIOCGICOUNT = 0x545d; + riscv_linux_record_tdep.ioctl_TIOCGHAYESESP = 0x545e; + riscv_linux_record_tdep.ioctl_TIOCSHAYESESP = 0x545f; + riscv_linux_record_tdep.ioctl_FIOQSIZE = 0x5460; + + /* These values are the second argument of system call "sys_fcntl" + and "sys_fcntl64". They are obtained from Linux Kernel source. */ + riscv_linux_record_tdep.fcntl_F_GETLK = 5; + riscv_linux_record_tdep.fcntl_F_GETLK64 = 12; + riscv_linux_record_tdep.fcntl_F_SETLK64 = 13; + riscv_linux_record_tdep.fcntl_F_SETLKW64 = 14; + + riscv_linux_record_tdep.arg1 = RISCV_A0_REGNUM; + riscv_linux_record_tdep.arg2 = RISCV_A1_REGNUM; + riscv_linux_record_tdep.arg3 = RISCV_A2_REGNUM; + riscv_linux_record_tdep.arg4 = RISCV_A3_REGNUM; + riscv_linux_record_tdep.arg5 = RISCV_A4_REGNUM; + riscv_linux_record_tdep.arg6 = RISCV_A5_REGNUM; +} + +/* Fetch and return the TLS DTV (dynamic thread vector) address for PTID. + Throw a suitable TLS error if something goes wrong. */ + +static CORE_ADDR +riscv_linux_get_tls_dtv_addr (struct gdbarch *gdbarch, ptid_t ptid, + svr4_tls_libc libc) +{ + /* On RISC-V, the thread pointer is found in TP. */ + regcache *regcache + = get_thread_arch_regcache (current_inferior (), ptid, gdbarch); + int thread_pointer_regnum = RISCV_TP_REGNUM; + target_fetch_registers (regcache, thread_pointer_regnum); + ULONGEST thr_ptr; + if (regcache->cooked_read (thread_pointer_regnum, &thr_ptr) != REG_VALID) + throw_error (TLS_GENERIC_ERROR, _("Unable to fetch thread pointer")); + + CORE_ADDR dtv_ptr_addr; + switch (libc) + { + case svr4_tls_libc_musl: + /* MUSL: The DTV pointer is found at the very end of the pthread + struct which is located *before* the thread pointer. I.e. + the thread pointer will be just beyond the end of the struct, + so the address of the DTV pointer is found one pointer-size + before the thread pointer. */ + dtv_ptr_addr + = thr_ptr - (gdbarch_ptr_bit (gdbarch) / TARGET_CHAR_BIT); + break; + case svr4_tls_libc_glibc: + /* GLIBC: The thread pointer (TP) points just beyond the end of + the TCB (thread control block). On RISC-V, this struct + (tcbhead_t) is defined to contain two pointers. The first is + a pointer to the DTV and the second is a pointer to private + data. So the DTV pointer address is 16 bytes (i.e. the size of + two pointers) before thread pointer. */ + + dtv_ptr_addr + = thr_ptr - 2 * (gdbarch_ptr_bit (gdbarch) / TARGET_CHAR_BIT); + break; + default: + throw_error (TLS_GENERIC_ERROR, _("Unknown RISC-V C library")); + break; + } + + gdb::byte_vector buf (gdbarch_ptr_bit (gdbarch) / TARGET_CHAR_BIT); + if (target_read_memory (dtv_ptr_addr, buf.data (), buf.size ()) != 0) + throw_error (TLS_GENERIC_ERROR, _("Unable to fetch DTV address")); + + const struct builtin_type *builtin = builtin_type (gdbarch); + CORE_ADDR dtv_addr = gdbarch_pointer_to_address + (gdbarch, builtin->builtin_data_ptr, buf.data ()); + return dtv_addr; +} + +/* For internal TLS lookup, return the DTP offset, which is the offset + to subtract from a DTV entry, in order to obtain the address of the + TLS block. */ + +static ULONGEST +riscv_linux_get_tls_dtp_offset (struct gdbarch *gdbarch, ptid_t ptid, + svr4_tls_libc libc) +{ + if (libc == svr4_tls_libc_musl) + { + /* This value is DTP_OFFSET in MUSL's arch/riscv64/pthread_arch.h. + It represents the value to subtract from the DTV entry, once + it has been loaded. */ + return 0x800; + } + else + return 0; +} + /* Initialize RISC-V Linux ABI info. */ static void @@ -198,6 +526,10 @@ riscv_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) /* Enable TLS support. */ set_gdbarch_fetch_tls_load_module_address (gdbarch, svr4_fetch_objfile_link_map); + set_gdbarch_get_thread_local_address (gdbarch, + svr4_tls_get_thread_local_address); + svr4_tls_register_tls_methods (info, gdbarch, riscv_linux_get_tls_dtv_addr, + riscv_linux_get_tls_dtp_offset); set_gdbarch_iterate_over_regset_sections (gdbarch, riscv_linux_iterate_over_regset_sections); @@ -205,6 +537,9 @@ riscv_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) tramp_frame_prepend_unwinder (gdbarch, &riscv_linux_sigframe); tdep->syscall_next_pc = riscv_linux_syscall_next_pc; + tdep->riscv_syscall_record = riscv_linux_syscall_record; + + riscv64_linux_record_tdep_init (gdbarch, riscv_linux_record_tdep); } /* Initialize RISC-V Linux target support. */ |