tools-for-build/ldso-stubs.lisp

   1 ;;;; Generate stubs for C-linkage library functions which we need to refer to
   2 ;;;; from Lisp.
   3 ;;;;
   4 ;;;; (But note this is only the Linux version, as per the FIXME
   5 ;;;; note in the BSD version in undefineds.h.)
   6 ;;;;
   7 ;;;; These stubs exist for the benefit of Lisp code that needs to refer
   8 ;;;; to foreign symbols when dlsym() is not available (i.e. when dumping
   9 ;;;; cold-sbcl.core, when we may be running in a host that's not SBCL,
  10 ;;;; or on platforms that don't have it at all). If the runtime is
  11 ;;;; dynamically linked, library functions won't be linked into it, so
  12 ;;;; the map file won't show them. So, we need a bunch of stubs that
  13 ;;;; nm(1) _can_ see.
  14 ;;;;
  15 ;;;; This software is part of the SBCL system. See the README file for
  16 ;;;; more information.
  17 ;;;;
  18 ;;;; This software is derived from the CMU CL system, which was
  19 ;;;; written at Carnegie Mellon University and released into the
  20 ;;;; public domain. The software is in the public domain and is
  21 ;;;; provided with absolutely no warranty. See the COPYING and CREDITS
  22 ;;;; files for more information.
  23
  24 #!-sparc
  25 (defun ldso-stubify (fct stream)
  26   (format stream "LDSO_STUBIFY(~A)~%" fct))
  27
  28 ;;; This is an attempt to follow DB's hint of sbcl-devel
  29 ;;; 2001-09-18. -- CSR
  30 ;;;
  31 ;;; And an attempt to work around the Sun toolchain... --ns
  32 #!+sparc
  33 (defun ldso-stubify (fct stream)
  34   (apply #'format stream "
  35 .globl ldso_stub__~A ;                          \\
  36         FUNCDEF(ldso_stub__~A) ;                \\
  37 ldso_stub__~A: ;                                \\
  38         sethi %hi(~A),%g1       ;               \\
  39         jmpl %g1+%lo(~A),%g0    ;               \\
  40         nop /* delay slot*/     ;               \\
  41 .L~Ae1: ;                                       \\
  42         .size    ldso_stub__~A,.L~Ae1-ldso_stub__~A ;~%"
  43           (make-list 9 :initial-element fct)))
  44
  45 #!+hppa
  46 (defun ldso-stubify (fct stream)
  47   (let ((stub (format nil "ldso_stub__~a" fct)))
  48     (apply #'format stream (list
  49 "    .export ~A
  50 ~A:
  51     .proc
  52     .callinfo
  53     b,n ~a
  54     .procend
  55     .import ~a,code~%" stub stub fct fct))))
  56
  57 (defvar *preludes* '("
  58 /* This is an automatically generated file, please do not hand-edit it.
  59  * See the program tools-for-build/ldso-stubs.lisp. */
  60
  61 #ifndef LANGUAGE_ASSEMBLY
  62 #define LANGUAGE_ASSEMBLY
  63 #endif
  64 #include \"sbcl.h\""
  65
  66 #!+arm "
  67 #define LDSO_STUBIFY(fct)               \\
  68   .align                              ; \\
  69   .global ldso_stub__ ## fct          ; \\
  70   .type ldso_stub__ ## fct, %function ; \\
  71 ldso_stub__ ## fct:                   ; \\
  72   ldr r8, =fct                        ; \\
  73   bx r8                               ; \\
  74   .size ldso_stub__ ## fct, .-ldso_stub__ ## fct"
  75 #!+arm64"
  76 #define LDSO_STUBIFY(fct)               \\
  77   .align                              ; \\
  78   .global ldso_stub__ ## fct          ; \\
  79   .type ldso_stub__ ## fct, %function ; \\
  80 ldso_stub__ ## fct:                   ; \\
  81   ldr x8, =fct                        ; \\
  82   br x8                               ; \\
  83   .size ldso_stub__ ## fct, .-ldso_stub__ ## fct"
  84
  85 #!+sparc "
  86 #ifdef LISP_FEATURE_SPARC
  87 #include \"sparc-funcdef.h\"
  88 #endif
  89         .text"
  90
  91 #!+(and (or x86 x86-64) (not darwin)) "
  92 #define LDSO_STUBIFY(fct)                       \\
  93         .align 16 ;                             \\
  94 .globl ldso_stub__ ## fct ;                     \\
  95         .type    ldso_stub__ ## fct,@function ; \\
  96 ldso_stub__ ## fct: ;                           \\
  97         jmp fct ;                               \\
  98 .L ## fct ## e1: ;                              \\
  99         .size    ldso_stub__ ## fct,.L ## fct ## e1-ldso_stub__ ## fct ;"
 100
 101 ;;; osf1 has ancient cpp that doesn't do ##
 102 #!+(and osf1 alpha) "
 103 #define LDSO_STUBIFY(fct)                       \\
 104 .globl ldso_stub__/**/fct ;                     \\
 105 ldso_stub__/**/fct: ;                           \\
 106         jmp fct ;                               \\
 107 .L/**/fct/**/e1: ;"
 108
 109 ;;; but there's no reason we need to put up with that on modern (Linux) OSes
 110 #!+(and linux alpha) "
 111 #define LDSO_STUBIFY(fct)                       \\
 112 .globl ldso_stub__ ## fct ;                     \\
 113         .type    ldso_stub__ ## fct,@function ; \\
 114 ldso_stub__ ## fct: ;                           \\
 115         jmp fct ;                               \\
 116 .L ## fct ## e1: ;                              \\
 117         .size    ldso_stub__ ## fct,.L ## fct ## e1-ldso_stub__ ## fct ;"
 118
 119 #!+hppa "
 120         .level  2.0
 121         .text"
 122
 123 #!+(and (not darwin) ppc) "
 124 #define LDSO_STUBIFY(fct)                       \\
 125 .globl ldso_stub__ ## fct ;                     \\
 126         .type    ldso_stub__ ## fct,@function ; \\
 127 ldso_stub__ ## fct: ;                           \\
 128         b fct ;                                 \\
 129 .L ## fct ## e1: ;                              \\
 130         .size    ldso_stub__ ## fct,.L ## fct ## e1-ldso_stub__ ## fct ;"
 131
 132 #!+(and darwin ppc) "
 133 #define LDSO_STUBIFY(fct)                       @\\
 134 .text                                           @\\
 135 .globl  _ldso_stub__ ## fct                      @\\
 136 _ldso_stub__ ## fct:                             @\\
 137         b _ldso_stub__ ## fct ## stub            @\\
 138 .symbol_stub _ldso_stub__ ## fct ## stub:        @\\
 139 .indirect_symbol _ ## fct                       @\\
 140         lis     r11,ha16(_ldso_stub__ ## fct ## $lazy_ptr)       @\\
 141         lwz     r12,lo16(_ldso_stub__ ## fct ## $lazy_ptr)(r11)  @\\
 142         mtctr   r12                             @\\
 143         addi    r11,r11,lo16(_ldso_stub__ ## fct ## $lazy_ptr)   @\\
 144         bctr                                    @\\
 145 .lazy_symbol_pointer                            @\\
 146 _ldso_stub__ ## fct ## $lazy_ptr:                @\\
 147         .indirect_symbol _ ## fct               @\\
 148         .long dyld_stub_binding_helper"
 149
 150 ;;; darwin x86 assembler is weird and follows the ppc assembler syntax
 151 #!+(and darwin x86) "
 152 #define LDSO_STUBIFY(fct)                       \\
 153 .text                           ;               \\
 154         .align 4 ;                              \\
 155 .globl _ldso_stub__ ## fct ;                    \\
 156 _ldso_stub__ ## fct: ;                          \\
 157         jmp L ## fct ## $stub ;                 \\
 158         .section __IMPORT,__jump_table,symbol_stubs,self_modifying_code+pure_instructions,5 ;   \\
 159 L ## fct ## $stub: ;                    \\
 160         .indirect_symbol _ ## fct ;     \\
 161         hlt                       ;     \\
 162         hlt                       ;     \\
 163         hlt                       ;     \\
 164         hlt                       ;     \\
 165         hlt                       ;     \\
 166         .subsections_via_symbols  ;    "
 167
 168 ;;; darwin x86-64
 169 #!+(and darwin x86-64) "
 170 #define LDSO_STUBIFY(fct)                       \\
 171         .align 4 ;                              \\
 172 .globl _ldso_stub__ ## fct ;                    \\
 173 _ldso_stub__ ## fct: ;                          \\
 174         jmp _ ## fct ;                          \\
 175 .L ## fct ## e1: ;                            "
 176
 177 ;;; KLUDGE: set up the vital fifth argument, passed on the
 178 ;;; stack.  Do this unconditionally, even if the stub is for a
 179 ;;; function with few arguments: it can't hurt.  We only do this for
 180 ;;; the fifth argument, as the first four are passed in registers
 181 ;;; and we apparently don't ever need to pass six arguments to a
 182 ;;; libc function.  -- CSR, 2003-10-29
 183 ;;; Expanded to 8 arguments regardless.  -- ths, 2005-03-24
 184 #!+mips "
 185 #define LDSO_STUBIFY(fct)                      \\
 186         .globl  ldso_stub__ ## fct ;           \\
 187         .type   ldso_stub__ ## fct,@function ; \\
 188         .ent    ldso_stub__ ## fct ;           \\
 189 ldso_stub__ ## fct: ;                  \\
 190         .set noat ;                    \\
 191         addiu $29,-48 ;                \\
 192         sw $28,40($29) ;               \\
 193         sw $31,44($29) ;               \\
 194         lw $25,64($29) ;               \\
 195         lw  $1,68($29) ;               \\
 196         sw $25,16($29) ;               \\
 197         sw  $1,20($29) ;               \\
 198         lw $25,72($29) ;               \\
 199         lw  $1,76($29) ;               \\
 200         sw $25,24($29) ;               \\
 201         sw  $1,28($29) ;               \\
 202         .set at ;                      \\
 203         la $25, fct ;                  \\
 204         jalr $25 ;                     \\
 205         lw $31,44($29) ;               \\
 206         lw $28,40($29) ;               \\
 207         addiu $29,48 ;                 \\
 208         jr $31 ;                       \\
 209         .end    ldso_stub__ ## fct ;   \\
 210         .size   ldso_stub__ ## fct,.-ldso_stub__ ## fct ;"))
 211
 212 (defvar *stubs* (append
 213                  '("_exit"
 214                    "accept"
 215                    "access"
 216                    "acos"
 217                    "acosh"
 218                    "asin"
 219                    "asinh"
 220                    "atanh"
 221                    "bind"
 222                    "chmod"
 223                    "chown"
 224                    "close"
 225                    "closedir"
 226                    "connect"
 227                    "cosh"
 228                    "creat"
 229                    "dup"
 230                    "dup2"
 231                    "execve"
 232                    "exit"
 233                    "fchmod"
 234                    "fchown"
 235                    "fcntl"
 236                    "fork"
 237                    "free"
 238                    "fstat"
 239                    #!+inode64 "fstat$INODE64"
 240                    "fsync"
 241                    "ftruncate"
 242                    "getcwd"
 243                    "getdtablesize"
 244                    "getegid"
 245                    "getenv"
 246                    "getgid"
 247                    "gethostbyaddr"
 248                    "gethostbyname"
 249                    "gethostname"
 250                    "getitimer"
 251                    "getpeername"
 252                    "getpgrp"
 253                    "getpid"
 254                    "getppid"
 255                    "getrusage"
 256                    "getsockname"
 257                    "gettimeofday"
 258                    "getuid"
 259                    "hypot"
 260                    "ioctl"
 261                    "isatty"
 262                    "kill"
 263                    "killpg"
 264                    "link"
 265                    "listen"
 266                    "log1p"
 267                    "lseek"
 268                    "lstat"
 269                    #!+inode64 "lstat$INODE64"
 270                    "malloc"
 271                    #!+(or x86 x86-64) "memcmp"
 272                    "memmove"
 273                    "mkdir"
 274                    "nanosleep"
 275                    "open"
 276                    "opendir"
 277                    "pipe"
 278                    "poll"
 279                    "pow"
 280                    "read"
 281                    "readdir"
 282                    "readlink"
 283                    "realpath"
 284                    "recv"
 285                    "rename"
 286                    "rmdir"
 287                    "select"
 288                    "send"
 289                    "setitimer"
 290                    "setpgrp"
 291                    "setsid"
 292                    "sinh"
 293                    "socket"
 294                    "stat"
 295                    #!+inode64 "stat$INODE64"
 296                    "strerror"
 297                    "strlen"
 298                    "symlink"
 299                    "sync"
 300                    "tanh"
 301                    "truncate"
 302                    "ttyname"
 303                    #!-hpux "tzname"
 304                    "unlink"
 305                    "utimes"
 306                    "wait3"
 307                    "waitpid"
 308                    "write")
 309                  ;; These aren't needed on the X86 because they're microcoded into the
 310                  ;; FPU, so the Lisp VOPs can implement them directly without having to
 311                  ;; call C code.
 312                  ;;
 313                  ;; Note: There might be some other functions in this category as well.
 314                  ;; E.g. I notice tanh() and acos() in the list above.. -- WHN 2001-06-07
 315                  #!-x86
 316                  '("sin"
 317                    "cos"
 318                    "tan"
 319                    "atan"
 320                    "atan2"
 321                    "exp"
 322                    "log"
 323                    "log10"
 324                    "sqrt")
 325                  #!+alpha
 326                  '("ieee_get_fp_control"
 327                    "ieee_set_fp_control")
 328                  ;; FIXME: After 1.0 this should be made
 329                  ;; #!-linkage-table, as we only need these stubs if
 330                  ;; we don't have linkage-table. Done this way now to
 331                  ;; cut down on the number of ports affected.
 332                  #!-(or win32 darwin freebsd netbsd openbsd)
 333                  '("ptsname"
 334                    #!-android "grantpt"
 335                    "unlockpt")
 336                  #!+(or openbsd freebsd dragonfly)
 337                  '("openpty")
 338                  '("dlclose"
 339                    "dlerror"
 340                    "dlopen"
 341                    "dlsym")
 342                  #!+bsd
 343                  '("sysctl")
 344                  #!+darwin
 345                  '("sysctlbyname")
 346                  #!+os-provides-dladdr
 347                  '("dladdr")
 348                  #!-android
 349                    '("nl_langinfo"
 350                      "getpagesize"
 351                      "cfgetispeed"
 352                      "cfgetospeed"
 353                      "cfsetispeed"
 354                      "cfsetospeed"
 355                      "tcdrain"
 356                      "tcflow"
 357                      "tcflush"
 358                      "tcgetattr"
 359                      "tcsendbreak"
 360                      "tcsetattr")))
 361
 362 (with-open-file (f "src/runtime/ldso-stubs.S" :direction :output :if-exists :supersede)
 363   (assert (= (length *preludes*) 2))
 364   (dolist (pre *preludes*)
 365     (write-line pre f))
 366   (dolist (stub *stubs*)
 367     (check-type stub string)
 368     (ldso-stubify stub f))
 369   (format f "
 370 #ifdef __ELF__
 371 // Mark the object as not requiring an executable stack.
 372 .section .note.GNU-stack,\"\",%progbits
 373 #endif~%"))