lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame^] | 1 | /* Copyright (C) 2005-2015 Free Software Foundation, Inc. |
| 2 | |
| 3 | This file is part of the GNU C Library. |
| 4 | |
| 5 | The GNU C Library is free software; you can redistribute it and/or |
| 6 | modify it under the terms of the GNU Lesser General Public License as |
| 7 | published by the Free Software Foundation; either version 2.1 of the |
| 8 | License, or (at your option) any later version. |
| 9 | |
| 10 | The GNU C Library is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | Lesser General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU Lesser General Public |
| 16 | License along with the GNU C Library. If not, see |
| 17 | <http://www.gnu.org/licenses/>. */ |
| 18 | |
| 19 | #include <sysdep.h> |
| 20 | #include <libc-symbols.h> |
| 21 | |
| 22 | #include "dl-link.h" |
| 23 | |
| 24 | #define ip0 x16 |
| 25 | #define ip1 x17 |
| 26 | #define lr x30 |
| 27 | |
| 28 | .text |
| 29 | .globl _dl_runtime_resolve |
| 30 | .type _dl_runtime_resolve, #function |
| 31 | cfi_startproc |
| 32 | .align 2 |
| 33 | _dl_runtime_resolve: |
| 34 | /* AArch64 we get called with: |
| 35 | ip0 &PLTGOT[2] |
| 36 | ip1 temp(dl resolver entry point) |
| 37 | [sp, #8] lr |
| 38 | [sp, #0] &PLTGOT[n] |
| 39 | */ |
| 40 | |
| 41 | cfi_rel_offset (lr, 8) |
| 42 | |
| 43 | /* Save arguments. */ |
| 44 | stp x8, x9, [sp, #-(80+8*16)]! |
| 45 | cfi_adjust_cfa_offset (80+8*16) |
| 46 | cfi_rel_offset (x8, 0) |
| 47 | cfi_rel_offset (x9, 8) |
| 48 | |
| 49 | stp x6, x7, [sp, #16] |
| 50 | cfi_rel_offset (x6, 16) |
| 51 | cfi_rel_offset (x7, 24) |
| 52 | |
| 53 | stp x4, x5, [sp, #32] |
| 54 | cfi_rel_offset (x4, 32) |
| 55 | cfi_rel_offset (x5, 40) |
| 56 | |
| 57 | stp x2, x3, [sp, #48] |
| 58 | cfi_rel_offset (x2, 48) |
| 59 | cfi_rel_offset (x3, 56) |
| 60 | |
| 61 | stp x0, x1, [sp, #64] |
| 62 | cfi_rel_offset (x0, 64) |
| 63 | cfi_rel_offset (x1, 72) |
| 64 | |
| 65 | stp q0, q1, [sp, #(80+0*16)] |
| 66 | cfi_rel_offset (q0, 80+0*16) |
| 67 | cfi_rel_offset (q1, 80+1*16) |
| 68 | |
| 69 | stp q2, q3, [sp, #(80+2*16)] |
| 70 | cfi_rel_offset (q0, 80+2*16) |
| 71 | cfi_rel_offset (q1, 80+3*16) |
| 72 | |
| 73 | stp q4, q5, [sp, #(80+4*16)] |
| 74 | cfi_rel_offset (q0, 80+4*16) |
| 75 | cfi_rel_offset (q1, 80+5*16) |
| 76 | |
| 77 | stp q6, q7, [sp, #(80+6*16)] |
| 78 | cfi_rel_offset (q0, 80+6*16) |
| 79 | cfi_rel_offset (q1, 80+7*16) |
| 80 | |
| 81 | /* Get pointer to linker struct. */ |
| 82 | ldr x0, [ip0, #-8] |
| 83 | |
| 84 | /* Prepare to call _dl_fixup(). */ |
| 85 | ldr x1, [sp, 80+8*16] /* Recover &PLTGOT[n] */ |
| 86 | |
| 87 | sub x1, x1, ip0 |
| 88 | add x1, x1, x1, lsl #1 |
| 89 | lsl x1, x1, #3 |
| 90 | sub x1, x1, #192 |
| 91 | lsr x1, x1, #3 |
| 92 | |
| 93 | /* Call fixup routine. */ |
| 94 | bl _dl_fixup |
| 95 | |
| 96 | /* Save the return. */ |
| 97 | mov ip0, x0 |
| 98 | |
| 99 | /* Get arguments and return address back. */ |
| 100 | ldp q0, q1, [sp, #(80+0*16)] |
| 101 | ldp q2, q3, [sp, #(80+2*16)] |
| 102 | ldp q4, q5, [sp, #(80+4*16)] |
| 103 | ldp q6, q7, [sp, #(80+6*16)] |
| 104 | ldp x0, x1, [sp, #64] |
| 105 | ldp x2, x3, [sp, #48] |
| 106 | ldp x4, x5, [sp, #32] |
| 107 | ldp x6, x7, [sp, #16] |
| 108 | ldp x8, x9, [sp], #(80+8*16) |
| 109 | cfi_adjust_cfa_offset (-(80+8*16)) |
| 110 | |
| 111 | ldp ip1, lr, [sp], #16 |
| 112 | cfi_adjust_cfa_offset (-16) |
| 113 | |
| 114 | /* Jump to the newly found address. */ |
| 115 | br ip0 |
| 116 | |
| 117 | cfi_endproc |
| 118 | .size _dl_runtime_resolve, .-_dl_runtime_resolve |
| 119 | #ifndef PROF |
| 120 | .globl _dl_runtime_profile |
| 121 | .type _dl_runtime_profile, #function |
| 122 | cfi_startproc |
| 123 | .align 2 |
| 124 | _dl_runtime_profile: |
| 125 | /* AArch64 we get called with: |
| 126 | ip0 &PLTGOT[2] |
| 127 | ip1 temp(dl resolver entry point) |
| 128 | [sp, #8] lr |
| 129 | [sp, #0] &PLTGOT[n] |
| 130 | |
| 131 | Stack frame layout: |
| 132 | [sp, #...] lr |
| 133 | [sp, #...] &PLTGOT[n] |
| 134 | [sp, #96] La_aarch64_regs |
| 135 | [sp, #48] La_aarch64_retval |
| 136 | [sp, #40] frame size return from pltenter |
| 137 | [sp, #32] dl_profile_call saved x1 |
| 138 | [sp, #24] dl_profile_call saved x0 |
| 139 | [sp, #16] t1 |
| 140 | [sp, #0] x29, lr <- x29 |
| 141 | */ |
| 142 | |
| 143 | # define OFFSET_T1 16 |
| 144 | # define OFFSET_SAVED_CALL_X0 OFFSET_T1 + 8 |
| 145 | # define OFFSET_FS OFFSET_SAVED_CALL_X0 + 16 |
| 146 | # define OFFSET_RV OFFSET_FS + 8 |
| 147 | # define OFFSET_RG OFFSET_RV + DL_SIZEOF_RV |
| 148 | |
| 149 | # define SF_SIZE OFFSET_RG + DL_SIZEOF_RG |
| 150 | |
| 151 | # define OFFSET_PLTGOTN SF_SIZE |
| 152 | # define OFFSET_LR OFFSET_PLTGOTN + 8 |
| 153 | |
| 154 | /* Save arguments. */ |
| 155 | sub sp, sp, #SF_SIZE |
| 156 | cfi_adjust_cfa_offset (SF_SIZE) |
| 157 | stp x29, x30, [SP, #0] |
| 158 | mov x29, sp |
| 159 | cfi_def_cfa_register (x29) |
| 160 | cfi_rel_offset (x29, 0) |
| 161 | cfi_rel_offset (lr, 8) |
| 162 | |
| 163 | stp x0, x1, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*0] |
| 164 | cfi_rel_offset (x0, OFFSET_RG + DL_OFFSET_RG_X0 + 16*0 + 0) |
| 165 | cfi_rel_offset (x1, OFFSET_RG + DL_OFFSET_RG_X0 + 16*0 + 8) |
| 166 | stp x2, x3, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*1] |
| 167 | cfi_rel_offset (x2, OFFSET_RG + DL_OFFSET_RG_X0 + 16*1 + 0) |
| 168 | cfi_rel_offset (x3, OFFSET_RG + DL_OFFSET_RG_X0 + 16*1 + 8) |
| 169 | stp x4, x5, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*2] |
| 170 | cfi_rel_offset (x4, OFFSET_RG + DL_OFFSET_RG_X0 + 16*2 + 0) |
| 171 | cfi_rel_offset (x5, OFFSET_RG + DL_OFFSET_RG_X0 + 16*2 + 8) |
| 172 | stp x6, x7, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*3] |
| 173 | cfi_rel_offset (x6, OFFSET_RG + DL_OFFSET_RG_X0 + 16*3 + 0) |
| 174 | cfi_rel_offset (x7, OFFSET_RG + DL_OFFSET_RG_X0 + 16*3 + 8) |
| 175 | |
| 176 | stp d0, d1, [X29, #OFFSET_RG + DL_OFFSET_RG_D0 + 16*0] |
| 177 | cfi_rel_offset (d0, OFFSET_RG + DL_OFFSET_RG_D0 + 16*0) |
| 178 | cfi_rel_offset (d1, OFFSET_RG + DL_OFFSET_RG_D0 + 16*0 + 8) |
| 179 | stp d2, d3, [X29, #OFFSET_RG+ DL_OFFSET_RG_D0 + 16*1] |
| 180 | cfi_rel_offset (d2, OFFSET_RG + DL_OFFSET_RG_D0 + 16*1 + 0) |
| 181 | cfi_rel_offset (d3, OFFSET_RG + DL_OFFSET_RG_D0 + 16*1 + 8) |
| 182 | stp d4, d5, [X29, #OFFSET_RG + DL_OFFSET_RG_D0 + 16*2] |
| 183 | cfi_rel_offset (d4, OFFSET_RG + DL_OFFSET_RG_D0 + 16*2 + 0) |
| 184 | cfi_rel_offset (d5, OFFSET_RG + DL_OFFSET_RG_D0 + 16*2 + 8) |
| 185 | stp d6, d7, [X29, #OFFSET_RG + DL_OFFSET_RG_D0 + 16*3] |
| 186 | cfi_rel_offset (d6, OFFSET_RG + DL_OFFSET_RG_D0 + 16*3 + 0) |
| 187 | cfi_rel_offset (d7, OFFSET_RG + DL_OFFSET_RG_D0 + 16*3 + 8) |
| 188 | |
| 189 | add x0, x29, #SF_SIZE + 16 |
| 190 | ldr x1, [x29, #OFFSET_LR] |
| 191 | stp x0, x1, [x29, #OFFSET_RG + DL_OFFSET_RG_SP] |
| 192 | |
| 193 | /* Get pointer to linker struct. */ |
| 194 | ldr x0, [ip0, #-8] |
| 195 | |
| 196 | /* Prepare to call _dl_profile_fixup(). */ |
| 197 | ldr x1, [x29, OFFSET_PLTGOTN] /* Recover &PLTGOT[n] */ |
| 198 | |
| 199 | sub x1, x1, ip0 |
| 200 | add x1, x1, x1, lsl #1 |
| 201 | lsl x1, x1, #3 |
| 202 | sub x1, x1, #192 |
| 203 | lsr x1, x1, #3 |
| 204 | |
| 205 | stp x0, x1, [x29, #OFFSET_SAVED_CALL_X0] |
| 206 | |
| 207 | /* Set up extra args for _dl_profile_fixup */ |
| 208 | ldr x2, [x29, #OFFSET_LR] /* load saved LR */ |
| 209 | add x3, x29, #OFFSET_RG /* address of La_aarch64_reg */ |
| 210 | add x4, x29, #OFFSET_FS /* address of framesize */ |
| 211 | bl _dl_profile_fixup |
| 212 | |
| 213 | ldr ip0, [x29, #OFFSET_FS] /* framesize == 0 */ |
| 214 | cmp ip0, #0 |
| 215 | bge 1f |
| 216 | cfi_remember_state |
| 217 | |
| 218 | /* Save the return. */ |
| 219 | mov ip0, x0 |
| 220 | |
| 221 | /* Get arguments and return address back. */ |
| 222 | ldp x0, x1, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*0] |
| 223 | ldp x2, x3, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*1] |
| 224 | ldp x4, x5, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*2] |
| 225 | ldp x6, x7, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*3] |
| 226 | ldp d0, d1, [x29, #OFFSET_RG + DL_OFFSET_RG_D0 + 16*0] |
| 227 | ldp d2, d3, [x29, #OFFSET_RG + DL_OFFSET_RG_D0 + 16*1] |
| 228 | ldp d4, d5, [x29, #OFFSET_RG + DL_OFFSET_RG_D0 + 16*2] |
| 229 | ldp d6, d7, [x29, #OFFSET_RG + DL_OFFSET_RG_D0 + 16*3] |
| 230 | |
| 231 | cfi_def_cfa_register (sp) |
| 232 | ldp x29, x30, [x29, #0] |
| 233 | cfi_restore(x29) |
| 234 | cfi_restore(x30) |
| 235 | |
| 236 | add sp, sp, SF_SIZE + 16 |
| 237 | cfi_adjust_cfa_offset (- SF_SIZE - 16) |
| 238 | |
| 239 | /* Jump to the newly found address. */ |
| 240 | br ip0 |
| 241 | |
| 242 | cfi_restore_state |
| 243 | 1: |
| 244 | /* The new frame size is in ip0. */ |
| 245 | |
| 246 | sub x1, x29, ip0 |
| 247 | and sp, x1, #0xfffffffffffffff0 |
| 248 | |
| 249 | str x0, [x29, #OFFSET_T1] |
| 250 | |
| 251 | mov x0, sp |
| 252 | add x1, x29, #SF_SIZE + 16 |
| 253 | mov x2, ip0 |
| 254 | bl memcpy |
| 255 | |
| 256 | ldr ip0, [x29, #OFFSET_T1] |
| 257 | |
| 258 | /* Call the function. */ |
| 259 | ldp x0, x1, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*0] |
| 260 | ldp x2, x3, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*1] |
| 261 | ldp x4, x5, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*2] |
| 262 | ldp x6, x7, [x29, #OFFSET_RG + DL_OFFSET_RG_X0 + 16*3] |
| 263 | ldp d0, d1, [x29, #OFFSET_RG + DL_OFFSET_RG_D0 + 16*0] |
| 264 | ldp d2, d3, [x29, #OFFSET_RG + DL_OFFSET_RG_D0 + 16*1] |
| 265 | ldp d4, d5, [x29, #OFFSET_RG + DL_OFFSET_RG_D0 + 16*2] |
| 266 | ldp d6, d7, [x29, #OFFSET_RG + DL_OFFSET_RG_D0 + 16*3] |
| 267 | blr ip0 |
| 268 | stp x0, x1, [x29, #OFFSET_RV + DL_OFFSET_RV_X0] |
| 269 | stp d0, d1, [x29, #OFFSET_RV + DL_OFFSET_RV_D0 + 16*0] |
| 270 | stp d2, d3, [x29, #OFFSET_RV + DL_OFFSET_RV_D0 + 16*1] |
| 271 | |
| 272 | /* Setup call to pltexit */ |
| 273 | ldp x0, x1, [x29, #OFFSET_SAVED_CALL_X0] |
| 274 | add x2, x29, #OFFSET_RG |
| 275 | add x3, x29, #OFFSET_RV |
| 276 | bl _dl_call_pltexit |
| 277 | |
| 278 | ldp x0, x1, [x29, #OFFSET_RV + DL_OFFSET_RV_X0] |
| 279 | ldp d0, d1, [x29, #OFFSET_RV + DL_OFFSET_RV_D0 + 16*0] |
| 280 | ldp d2, d3, [x29, #OFFSET_RV + DL_OFFSET_RV_D0 + 16*1] |
| 281 | /* LR from within La_aarch64_reg */ |
| 282 | ldr lr, [x29, #OFFSET_RG + DL_OFFSET_RG_LR] |
| 283 | cfi_restore(lr) |
| 284 | mov sp, x29 |
| 285 | cfi_def_cfa_register (sp) |
| 286 | ldr x29, [x29, #0] |
| 287 | cfi_restore(x29) |
| 288 | add sp, sp, SF_SIZE + 16 |
| 289 | cfi_adjust_cfa_offset (- SF_SIZE - 16) |
| 290 | |
| 291 | br lr |
| 292 | |
| 293 | cfi_endproc |
| 294 | .size _dl_runtime_profile, .-_dl_runtime_profile |
| 295 | #endif |
| 296 | .previous |