include files

d8945e9b44185cc8e8bc9537754c9a4bf28745fd · ovidiucs · Jul 29, 2018 22:51
+382 · 2 files changed
io.inc +49 −0
unistd64.inc +333 −0
diff --git a/io.inc b/io.inc
new file mode 100644
index 0000000..63bf7a2
--- /dev/null
+++ b/io.inc
@@ -0,0 +1,49 @@
+strlen:
+  push rdi                ; push registers to stack
+  push rcx                ; saving these values
+                          ; after function return leave as intiial state
+  sub rcx, rcx            ; set rcx to 0
+  mov rcx, -1             ; negative one to rcx
+  sub al, al              ; subtract al register - lower octet from rax 
+  cld                     ; clear direction flags - 
+                          ; Clearing the DF flag causes the string instructions to auto-increment
+                          ; (process strings from low addresses to high addresses).
+  repne scasb             ; scans through a strings and compares the characters of string to
+                          ; whatever is in 'al' scasb. Look at string char by char and compare to al and reach zero
+                          ; repeat if not equal will exit the loop
+                          ; The SCAS instruction subtracts the destination string element from the contents of the EAX, AX, or AL register
+                          ; (depending on operand length) and updates the status flags according to the results. The string element and
+                          ; register contents are not modified. The following “short forms” of the SCAS instruction specify the operand length:
+                          ; SCASB (scan byte string), SCASW (scan word string), and SCASD (scan doubleword string).
+                          ; When used in string instructions, the ESI and EDI registers
+                          ; are automatically incremented or decremented after each iteration of an instruction to point to the next element (byte,
+                          ; word, or doubleword) in the string. String operations can thus begin at higher addresses and work toward lower ones,
+                          ; or they can begin at lower addresses and  work toward higher ones. The DF flag in the EFLAGS register controls
+                          ; whether the registers are incremented (DF = 0) or decremented (DF = 1). The STD and CLD instructions set and
+                          ; clear this flag, respectively.
+  neg rcx                 ; negate rcx so it will be a positive number
+  sub rcx,1               ; our string ends with a zero so we need to sub one
+  mov rax,rcx             ; we now have the string length and we should return the value of the
+                          ; string length now in rcx into rax register. Returning functions to
+                          ; rax is best practice.
+  pop rcx                 ; restore the registers to initial state
+  pop rdi                 ; restore original rdi value
+  ret                     ; return the function result to rax
+
+print:
+  call strlen             ; will have string length in rax 
+  mov rdx, rax            ; so this will be copied to rdx
+  mov rsi, rdi            ; and also copy the rdi into rsi
+  mov rdi, 1              ; stdout - argument
+  mov rax, sys_write      ; syswrite - kernel function
+  syscall                 ; call linux os kernel
+  ret                     ; return to next instruction - xor rdi, rdi
+
+
+read:
+  mov rdx, rdi            ; buffer to read to 
+  mov rdi, 0              ; stdin - argument 
+  mov rax, sys_read       ; sys_read
+  syscall                 ; call to linux kernel 
+  ret                     ; return 
+
diff --git a/unistd64.inc b/unistd64.inc
new file mode 100644
index 0000000..5267137
--- /dev/null
+++ b/unistd64.inc
@@ -0,0 +1,333 @@
+sys_read = 0
+sys_write = 1
+sys_open = 2
+sys_close = 3
+sys_stat = 4
+sys_fstat = 5
+sys_lstat = 6
+sys_poll = 7
+sys_lseek = 8
+sys_mmap = 9
+sys_mprotect = 10
+sys_munmap = 11
+sys_brk = 12
+sys_rt_sigaction = 13
+sys_rt_sigprocmask = 14
+sys_rt_sigreturn = 15
+sys_ioctl = 16
+sys_pread64 = 17
+sys_pwrite64 = 18
+sys_readv = 19
+sys_writev = 20
+sys_access = 21
+sys_pipe = 22
+sys_select = 23
+sys_sched_yield = 24
+sys_mremap = 25
+sys_msync = 26
+sys_mincore = 27
+sys_madvise = 28
+sys_shmget = 29
+sys_shmat = 30
+sys_shmctl = 31
+sys_dup = 32
+sys_dup2 = 33
+sys_pause = 34
+sys_nanosleep = 35
+sys_getitimer = 36
+sys_alarm = 37
+sys_setitimer = 38
+sys_getpid = 39
+sys_sendfile = 40
+sys_socket = 41
+sys_connect = 42
+sys_accept = 43
+sys_sendto = 44
+sys_recvfrom = 45
+sys_sendmsg = 46
+sys_recvmsg = 47
+sys_shutdown = 48
+sys_bind = 49
+sys_listen = 50
+sys_getsockname = 51
+sys_getpeername = 52
+sys_socketpair = 53
+sys_setsockopt = 54
+sys_getsockopt = 55
+sys_clone = 56
+sys_fork = 57
+sys_vfork = 58
+sys_execve = 59
+sys_exit = 60
+sys_wait4 = 61
+sys_kill = 62
+sys_uname = 63
+sys_semget = 64
+sys_semop = 65
+sys_semctl = 66
+sys_shmdt = 67
+sys_msgget = 68
+sys_msgsnd = 69
+sys_msgrcv = 70
+sys_msgctl = 71
+sys_fcntl = 72
+sys_flock = 73
+sys_fsync = 74
+sys_fdatasync = 75
+sys_truncate = 76
+sys_ftruncate = 77
+sys_getdents = 78
+sys_getcwd = 79
+sys_chdir = 80
+sys_fchdir = 81
+sys_rename = 82
+sys_mkdir = 83
+sys_rmdir = 84
+sys_creat = 85
+sys_link = 86
+sys_unlink = 87
+sys_symlink = 88
+sys_readlink = 89
+sys_chmod = 90
+sys_fchmod = 91
+sys_chown = 92
+sys_fchown = 93
+sys_lchown = 94
+sys_umask = 95
+sys_gettimeofday = 96
+sys_getrlimit = 97
+sys_getrusage = 98
+sys_sysinfo = 99
+sys_times = 100
+sys_ptrace = 101
+sys_getuid = 102
+sys_syslog = 103
+sys_getgid = 104
+sys_setuid = 105
+sys_setgid = 106
+sys_geteuid = 107
+sys_getegid = 108
+sys_setpgid = 109
+sys_getppid = 110
+sys_getpgrp = 111
+sys_setsid = 112
+sys_setreuid = 113
+sys_setregid = 114
+sys_getgroups = 115
+sys_setgroups = 116
+sys_setresuid = 117
+sys_getresuid = 118
+sys_setresgid = 119
+sys_getresgid = 120
+sys_getpgid = 121
+sys_setfsuid = 122
+sys_setfsgid = 123
+sys_getsid = 124
+sys_capget = 125
+sys_capset = 126
+sys_rt_sigpending = 127
+sys_rt_sigtimedwait = 128
+sys_rt_sigqueueinfo = 129
+sys_rt_sigsuspend = 130
+sys_sigaltstack = 131
+sys_utime = 132
+sys_mknod = 133
+sys_uselib = 134
+sys_personality = 135
+sys_ustat = 136
+sys_statfs = 137
+sys_fstatfs = 138
+sys_sysfs = 139
+sys_getpriority = 140
+sys_setpriority = 141
+sys_sched_setparam = 142
+sys_sched_getparam = 143
+sys_sched_setscheduler = 144
+sys_sched_getscheduler = 145
+sys_sched_get_priority_max = 146
+sys_sched_get_priority_min = 147
+sys_sched_rr_get_interval = 148
+sys_mlock = 149
+sys_munlock = 150
+sys_mlockall = 151
+sys_munlockall = 152
+sys_vhangup = 153
+sys_modify_ldt = 154
+sys_pivot_root = 155
+sys_sysctl = 156
+sys_prctl = 157
+sys_arch_prctl = 158
+sys_adjtimex = 159
+sys_setrlimit = 160
+sys_chroot = 161
+sys_sync = 162
+sys_acct = 163
+sys_settimeofday = 164
+sys_mount = 165
+sys_umount2 = 166
+sys_swapon = 167
+sys_swapoff = 168
+sys_reboot = 169
+sys_sethostname = 170
+sys_setdomainname = 171
+sys_iopl = 172
+sys_ioperm = 173
+sys_create_module = 174
+sys_init_module = 175
+sys_delete_module = 176
+sys_get_kernel_syms = 177
+sys_query_module = 178
+sys_quotactl = 179
+sys_nfsservctl = 180
+sys_getpmsg = 181
+sys_putpmsg = 182
+sys_afs_syscall = 183
+sys_tuxcall = 184
+sys_security = 185
+sys_gettid = 186
+sys_readahead = 187
+sys_setxattr = 188
+sys_lsetxattr = 189
+sys_fsetxattr = 190
+sys_getxattr = 191
+sys_lgetxattr = 192
+sys_fgetxattr = 193
+sys_listxattr = 194
+sys_llistxattr = 195
+sys_flistxattr = 196
+sys_removexattr = 197
+sys_lremovexattr = 198
+sys_fremovexattr = 199
+sys_tkill = 200
+sys_time = 201
+sys_futex = 202
+sys_sched_setaffinity = 203
+sys_sched_getaffinity = 204
+sys_set_thread_area = 205
+sys_io_setup = 206
+sys_io_destroy = 207
+sys_io_getevents = 208
+sys_io_submit = 209
+sys_io_cancel = 210
+sys_get_thread_area = 211
+sys_lookup_dcookie = 212
+sys_epoll_create = 213
+sys_epoll_ctl_old = 214
+sys_epoll_wait_old = 215
+sys_remap_file_pages = 216
+sys_getdents64 = 217
+sys_set_tid_address = 218
+sys_restart_syscall = 219
+sys_semtimedop = 220
+sys_fadvise64 = 221
+sys_timer_create = 222
+sys_timer_settime = 223
+sys_timer_gettime = 224
+sys_timer_getoverrun = 225
+sys_timer_delete = 226
+sys_clock_settime = 227
+sys_clock_gettime = 228
+sys_clock_getres = 229
+sys_clock_nanosleep = 230
+sys_exit_group = 231
+sys_epoll_wait = 232
+sys_epoll_ctl = 233
+sys_tgkill = 234
+sys_utimes = 235
+sys_vserver = 236
+sys_mbind = 237
+sys_set_mempolicy = 238
+sys_get_mempolicy = 239
+sys_mq_open = 240
+sys_mq_unlink = 241
+sys_mq_timedsend = 242
+sys_mq_timedreceive = 243
+sys_mq_notify = 244
+sys_mq_getsetattr = 245
+sys_kexec_load = 246
+sys_waitid = 247
+sys_add_key = 248
+sys_request_key = 249
+sys_keyctl = 250
+sys_ioprio_set = 251
+sys_ioprio_get = 252
+sys_inotify_init = 253
+sys_inotify_add_watch = 254
+sys_inotify_rm_watch = 255
+sys_migrate_pages = 256
+sys_openat = 257
+sys_mkdirat = 258
+sys_mknodat = 259
+sys_fchownat = 260
+sys_futimesat = 261
+sys_newfstatat = 262
+sys_unlinkat = 263
+sys_renameat = 264
+sys_linkat = 265
+sys_symlinkat = 266
+sys_readlinkat = 267
+sys_fchmodat = 268
+sys_faccessat = 269
+sys_pselect6 = 270
+sys_ppoll = 271
+sys_unshare = 272
+sys_set_robust_list = 273
+sys_get_robust_list = 274
+sys_splice = 275
+sys_tee = 276
+sys_sync_file_range = 277
+sys_vmsplice = 278
+sys_move_pages = 279
+sys_utimensat = 280
+sys_epoll_pwait = 281
+sys_signalfd = 282
+sys_timerfd_create = 283
+sys_eventfd = 284
+sys_fallocate = 285
+sys_timerfd_settime = 286
+sys_timerfd_gettime = 287
+sys_accept4 = 288
+sys_signalfd4 = 289
+sys_eventfd2 = 290
+sys_epoll_create1 = 291
+sys_dup3 = 292
+sys_pipe2 = 293
+sys_inotify_init1 = 294
+sys_preadv = 295
+sys_pwritev = 296
+sys_rt_tgsigqueueinfo = 297
+sys_perf_event_open = 298
+sys_recvmmsg = 299
+sys_fanotify_init = 300
+sys_fanotify_mark = 301
+sys_prlimit64 = 302
+sys_name_to_handle_at = 303
+sys_open_by_handle_at = 304
+sys_clock_adjtime = 305
+sys_syncfs = 306
+sys_sendmmsg = 307
+sys_setns = 308
+sys_getcpu = 309
+sys_process_vm_readv = 310
+sys_process_vm_writev = 311
+sys_kcmp = 312
+sys_finit_module = 313
+sys_sched_setattr = 314
+sys_sched_getattr = 315
+sys_renameat2 = 316
+sys_seccomp = 317
+sys_getrandom = 318
+sys_memfd_create = 319
+sys_kexec_file_load = 320
+sys_bpf = 321
+sys_execveat = 322
+sys_userfaultfd = 323
+sys_membarrier = 324
+sys_mlock2 = 325
+sys_copy_file_range = 326
+sys_preadv2 = 327
+sys_pwritev2 = 328
+sys_pkey_mprotect = 329
+sys_pkey_alloc = 330
+sys_pkey_free = 331
+sys_statx = 332