1/* ----------------------------------------------------------------------- 2 linux.S - (c) 2003-2004 Randolph Chung <tausq@debian.org> 3 (c) 2008 Red Hat, Inc. 4 (c) 2016 John David Anglin 5 6 HPPA Foreign Function Interface 7 8 Permission is hereby granted, free of charge, to any person obtaining 9 a copy of this software and associated documentation files (the 10 ``Software''), to deal in the Software without restriction, including 11 without limitation the rights to use, copy, modify, merge, publish, 12 distribute, sublicense, and/or sell copies of the Software, and to 13 permit persons to whom the Software is furnished to do so, subject to 14 the following conditions: 15 16 The above copyright notice and this permission notice shall be included 17 in all copies or substantial portions of the Software. 18 19 THE SOFTWARE IS PROVIDED ``AS IS'', WITHOUT WARRANTY OF ANY KIND, EXPRESS 20 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 21 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 22 IN NO EVENT SHALL RENESAS TECHNOLOGY BE LIABLE FOR ANY CLAIM, DAMAGES OR 23 OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 24 ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 25 OTHER DEALINGS IN THE SOFTWARE. 26 ----------------------------------------------------------------------- */ 27 28#define LIBFFI_ASM 29#include <fficonfig.h> 30#include <ffi.h> 31 32 .text 33 .level 1.1 34 .align 4 35 36 /* void ffi_call_pa32(void (*)(char *, extended_cif *), 37 extended_cif *ecif, 38 unsigned bytes, 39 unsigned flags, 40 unsigned *rvalue, 41 void (*fn)(void), 42 ffi_go_closure *closure); 43 */ 44 45 .export ffi_call_pa32,code 46 .import ffi_prep_args_pa32,code 47 48 .type ffi_call_pa32, @function 49 .cfi_startproc 50ffi_call_pa32: 51 .proc 52 .callinfo FRAME=64,CALLS,SAVE_RP,SAVE_SP,ENTRY_GR=4 53 .entry 54 stw %rp, -20(%sp) 55 copy %r3, %r1 56 .cfi_offset 2, -20 57 .cfi_register 3, 1 58 59 copy %sp, %r3 60 .cfi_def_cfa_register 3 61 62 /* Setup the stack for calling prep_args... 63 We want the stack to look like this: 64 65 [ Previous stack ] <- %r3 66 67 [ 64-bytes register save area ] <- %r4 68 69 [ Stack space for actual call, passed as ] <- %arg0 70 [ arg0 to ffi_prep_args_pa32 ] 71 72 [ Stack for calling prep_args ] <- %sp 73 */ 74 75 stwm %r1, 64(%sp) 76 .cfi_offset 3, 0 77 stw %r4, 12(%r3) 78 copy %sp, %r4 79 80 addl %arg2, %r4, %arg0 /* arg stack */ 81 stw %arg3, -48(%r3) /* save flags; we need it later */ 82 83 /* Call prep_args: 84 %arg0(stack) -- set up above 85 %arg1(ecif) -- same as incoming param 86 %arg2(bytes) -- same as incoming param */ 87 bl ffi_prep_args_pa32,%r2 88 ldo 64(%arg0), %sp 89 ldo -64(%sp), %sp 90 91 /* now %sp should point where %arg0 was pointing. */ 92 93 /* Load the arguments that should be passed in registers 94 The fp args were loaded by the prep_args function. */ 95 ldw -36(%sp), %arg0 96 ldw -40(%sp), %arg1 97 ldw -44(%sp), %arg2 98 ldw -48(%sp), %arg3 99 100 /* in case the function is going to return a structure 101 we need to give it a place to put the result. */ 102 ldw -52(%r3), %ret0 /* %ret0 <- rvalue */ 103 ldw -56(%r3), %r22 /* %r22 <- function to call */ 104 ldw -60(%r3), %ret1 /* %ret1 <- closure */ 105 bl $$dyncall, %r31 /* Call the user function */ 106 copy %r31, %rp 107 108 /* Prepare to store the result; we need to recover flags and rvalue. */ 109 ldw -48(%r3), %r21 /* r21 <- flags */ 110 ldw -52(%r3), %r20 /* r20 <- rvalue */ 111 112 /* Store the result according to the return type. */ 113 114.Lcheckint: 115 comib,<>,n FFI_TYPE_INT, %r21, .Lcheckint8 116 b .Ldone 117 stw %ret0, 0(%r20) 118 119.Lcheckint8: 120 comib,<>,n FFI_TYPE_UINT8, %r21, .Lcheckint16 121 b .Ldone 122 stb %ret0, 0(%r20) 123 124.Lcheckint16: 125 comib,<>,n FFI_TYPE_UINT16, %r21, .Lcheckdbl 126 b .Ldone 127 sth %ret0, 0(%r20) 128 129.Lcheckdbl: 130 comib,<>,n FFI_TYPE_DOUBLE, %r21, .Lcheckfloat 131 b .Ldone 132 fstd %fr4,0(%r20) 133 134.Lcheckfloat: 135 comib,<>,n FFI_TYPE_FLOAT, %r21, .Lcheckll 136 b .Ldone 137 fstw %fr4L,0(%r20) 138 139.Lcheckll: 140 comib,<>,n FFI_TYPE_UINT64, %r21, .Lchecksmst2 141 stw %ret0, 0(%r20) 142 b .Ldone 143 stw %ret1, 4(%r20) 144 145.Lchecksmst2: 146 comib,<>,n FFI_TYPE_SMALL_STRUCT2, %r21, .Lchecksmst3 147 /* 2-byte structs are returned in ret0 as ????xxyy. */ 148 extru %ret0, 23, 8, %r22 149 stbs,ma %r22, 1(%r20) 150 b .Ldone 151 stb %ret0, 0(%r20) 152 153.Lchecksmst3: 154 comib,<>,n FFI_TYPE_SMALL_STRUCT3, %r21, .Lchecksmst4 155 /* 3-byte structs are returned in ret0 as ??xxyyzz. */ 156 extru %ret0, 15, 8, %r22 157 stbs,ma %r22, 1(%r20) 158 extru %ret0, 23, 8, %r22 159 stbs,ma %r22, 1(%r20) 160 b .Ldone 161 stb %ret0, 0(%r20) 162 163.Lchecksmst4: 164 comib,<>,n FFI_TYPE_SMALL_STRUCT4, %r21, .Lchecksmst5 165 /* 4-byte structs are returned in ret0 as wwxxyyzz. */ 166 extru %ret0, 7, 8, %r22 167 stbs,ma %r22, 1(%r20) 168 extru %ret0, 15, 8, %r22 169 stbs,ma %r22, 1(%r20) 170 extru %ret0, 23, 8, %r22 171 stbs,ma %r22, 1(%r20) 172 b .Ldone 173 stb %ret0, 0(%r20) 174 175.Lchecksmst5: 176 comib,<>,n FFI_TYPE_SMALL_STRUCT5, %r21, .Lchecksmst6 177 /* 5 byte values are returned right justified: 178 ret0 ret1 179 5: ??????aa bbccddee */ 180 stbs,ma %ret0, 1(%r20) 181 extru %ret1, 7, 8, %r22 182 stbs,ma %r22, 1(%r20) 183 extru %ret1, 15, 8, %r22 184 stbs,ma %r22, 1(%r20) 185 extru %ret1, 23, 8, %r22 186 stbs,ma %r22, 1(%r20) 187 b .Ldone 188 stb %ret1, 0(%r20) 189 190.Lchecksmst6: 191 comib,<>,n FFI_TYPE_SMALL_STRUCT6, %r21, .Lchecksmst7 192 /* 6 byte values are returned right justified: 193 ret0 ret1 194 6: ????aabb ccddeeff */ 195 extru %ret0, 23, 8, %r22 196 stbs,ma %r22, 1(%r20) 197 stbs,ma %ret0, 1(%r20) 198 extru %ret1, 7, 8, %r22 199 stbs,ma %r22, 1(%r20) 200 extru %ret1, 15, 8, %r22 201 stbs,ma %r22, 1(%r20) 202 extru %ret1, 23, 8, %r22 203 stbs,ma %r22, 1(%r20) 204 b .Ldone 205 stb %ret1, 0(%r20) 206 207.Lchecksmst7: 208 comib,<>,n FFI_TYPE_SMALL_STRUCT7, %r21, .Lchecksmst8 209 /* 7 byte values are returned right justified: 210 ret0 ret1 211 7: ??aabbcc ddeeffgg */ 212 extru %ret0, 15, 8, %r22 213 stbs,ma %r22, 1(%r20) 214 extru %ret0, 23, 8, %r22 215 stbs,ma %r22, 1(%r20) 216 stbs,ma %ret0, 1(%r20) 217 extru %ret1, 7, 8, %r22 218 stbs,ma %r22, 1(%r20) 219 extru %ret1, 15, 8, %r22 220 stbs,ma %r22, 1(%r20) 221 extru %ret1, 23, 8, %r22 222 stbs,ma %r22, 1(%r20) 223 b .Ldone 224 stb %ret1, 0(%r20) 225 226.Lchecksmst8: 227 comib,<>,n FFI_TYPE_SMALL_STRUCT8, %r21, .Ldone 228 /* 8 byte values are returned right justified: 229 ret0 ret1 230 8: aabbccdd eeffgghh */ 231 extru %ret0, 7, 8, %r22 232 stbs,ma %r22, 1(%r20) 233 extru %ret0, 15, 8, %r22 234 stbs,ma %r22, 1(%r20) 235 extru %ret0, 23, 8, %r22 236 stbs,ma %r22, 1(%r20) 237 stbs,ma %ret0, 1(%r20) 238 extru %ret1, 7, 8, %r22 239 stbs,ma %r22, 1(%r20) 240 extru %ret1, 15, 8, %r22 241 stbs,ma %r22, 1(%r20) 242 extru %ret1, 23, 8, %r22 243 stbs,ma %r22, 1(%r20) 244 stb %ret1, 0(%r20) 245 246.Ldone: 247 /* all done, return */ 248 copy %r4, %sp /* pop arg stack */ 249 ldw 12(%r3), %r4 250 ldwm -64(%sp), %r3 /* .. and pop stack */ 251 ldw -20(%sp), %rp 252 bv %r0(%rp) 253 nop 254 .exit 255 .procend 256 .cfi_endproc 257 258 /* void ffi_closure_pa32(void); 259 Called with ffi_closure argument in %r21. */ 260 .export ffi_closure_pa32,code 261 .import ffi_closure_inner_pa32,code 262 .type ffi_closure_pa32, @function 263 .cfi_startproc 264ffi_closure_pa32: 265 .proc 266 .callinfo FRAME=64,CALLS,SAVE_RP,SAVE_SP,ENTRY_GR=3 267 .entry 268 269 stw %rp, -20(%sp) 270 copy %r3, %r1 271 .cfi_offset 2, -20 272 .cfi_register 3, 1 273 copy %sp, %r3 274 .cfi_def_cfa_register 3 275 stwm %r1, 64(%sp) 276 .cfi_offset 3, 0 277 278 /* Put arguments onto the stack and call ffi_closure_inner. */ 279 stw %arg0, -36(%r3) 280 stw %arg1, -40(%r3) 281 stw %arg2, -44(%r3) 282 stw %arg3, -48(%r3) 283 284 /* Closure type 0. */ 285 copy %r21, %arg0 286 copy %r0, %arg2 287 bl ffi_closure_inner_pa32, %r2 288 copy %r3, %arg1 289 290 ldwm -64(%sp), %r3 291 ldw -20(%sp), %rp 292 ldw -36(%sp), %ret0 293 bv %r0(%r2) 294 ldw -40(%sp), %ret1 295 296 .exit 297 .procend 298 .cfi_endproc 299 300 /* void ffi_go_closure_pa32(void); 301 Called with ffi_go_closure argument in %ret1. */ 302 .export ffi_go_closure_pa32,code 303 .import ffi_closure_inner_pa32,code 304 .type ffi_go_closure_pa32, @function 305 .cfi_startproc 306ffi_go_closure_pa32: 307 .proc 308 .callinfo FRAME=64,CALLS,SAVE_RP,SAVE_SP,ENTRY_GR=3 309 .entry 310 311 stw %rp, -20(%sp) 312 copy %r3, %r1 313 .cfi_offset 2, -20 314 .cfi_register 3, 1 315 copy %sp, %r3 316 .cfi_def_cfa_register 3 317 stwm %r1, 64(%sp) 318 .cfi_offset 3, 0 319 320 /* Put arguments onto the stack and call ffi_closure_inner. */ 321 stw %arg0, -36(%r3) 322 stw %arg1, -40(%r3) 323 stw %arg2, -44(%r3) 324 stw %arg3, -48(%r3) 325 326 /* Closure type 1. */ 327 copy %ret1, %arg0 328 ldi 1, %arg2 329 bl ffi_closure_inner_pa32, %r2 330 copy %r3, %arg1 331 332 ldwm -64(%sp), %r3 333 ldw -20(%sp), %rp 334 ldw -36(%sp), %ret0 335 bv %r0(%r2) 336 ldw -40(%sp), %ret1 337 338 .exit 339 .procend 340 .cfi_endproc 341