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1.1 ! root 1: # File to either setup register 2 to point to the GOT, or to adjust the ! 2: # pointers in the .got2 section to point to their new addresses. ! 3: ! 4: .file "eabi.asm" ! 5: .section ".text" ! 6: .globl __eabi ! 7: ! 8: .section ".got2","aw" ! 9: .LCTOC1 = . # +32768 ! 10: ! 11: # Table of addresses ! 12: .Ltable = .-.LCTOC1 ! 13: .long .LCTOC1 # address we are really at ! 14: ! 15: .Lgot = .-.LCTOC1 ! 16: .long _GLOBAL_OFFSET_TABLE_ # normal GOT address ! 17: ! 18: .Lgots = .-.LCTOC1 ! 19: .long _GOT_START_ # start of .got section ! 20: ! 21: .Lgote = .-.LCTOC1 ! 22: .long _GOT_END_ # end of .got section ! 23: ! 24: .Lgot2s = .-.LCTOC1 ! 25: .long _GOT2_START_ # -mrelocatable GOT pointers start ! 26: ! 27: .Lgot2e = .-.LCTOC1 ! 28: .long _GOT2_END_ # -mrelocatable GOT pointers end ! 29: ! 30: .Lfixups = .-.LCTOC1 ! 31: .long _FIXUP_START_ # start of .fixup section ! 32: ! 33: .Lfixupe = .-.LCTOC1 ! 34: .long _FIXUP_END_ # end of .fixup section ! 35: ! 36: .text ! 37: .Lptr: ! 38: .long .LCTOC1-.Laddr # PC relative pointer to .got2 ! 39: .long 0x4000 # traceback table ! 40: ! 41: __eabi: mflr 0 ! 42: bl .Laddr # get current address ! 43: .Laddr: ! 44: mflr 12 # real address of .Laddr ! 45: lwz 11,(.Lptr-.Laddr)(12) # linker generated address of .LCTOC1 ! 46: add 11,11,12 # correct to real pointer ! 47: lwz 12,.Ltable(11) # get linker's idea of where .Laddr is ! 48: subf. 12,12,11 # calculate difference ! 49: mtlr 0 # restore link register ! 50: bc 4,2,.Lreloc # skip if we need to relocate ! 51: ! 52: # Only load up register 2 if there is a .got section ! 53: ! 54: lwz 3,.Lgots(11) # start of .got section ! 55: lwz 4,.Lgote(11) # end of .got section ! 56: cmpw 1,3,4 # .got section non-empty? ! 57: bc 12,6,.Ldone ! 58: ! 59: # Normal program, load up register 2 ! 60: ! 61: lwz 2,.Lgot(11) # normal GOT address (obsolete in register 2) ! 62: mr 13,2 # also same as _SDA_BASE_ (V.4 small data ptr) ! 63: b __do_global_ctors # do any C++ global constructors (which returns to caller) ! 64: ! 65: # We need to relocate the .got2 pointers. Don't load register 2 ! 66: ! 67: .Lreloc: ! 68: lwz 3,.Lgot2s(11) # GOT pointers start ! 69: lwz 4,.Lgot2e(11) # GOT pointers end ! 70: add 3,12,3 # adjust pointers ! 71: add 4,12,4 ! 72: ! 73: cmpw 1,3,4 # any pointers to adjust ! 74: bc 12,6,.Lfix ! 75: ! 76: .Lloop: ! 77: lwz 5,0(3) # next pointer ! 78: add 5,5,12 # adjust ! 79: stw 5,0(3) ! 80: addi 3,3,4 # bump to next word ! 81: cmpw 1,3,4 # more pointers to adjust? ! 82: bc 4,6,.Lloop ! 83: ! 84: # Fixup any user initialized pointers now (the compiler drops pointers to ! 85: # each of the relocs that it does in the .fixup section). Note, the pointers ! 86: # themselves have already been fixed up by the previous loop. ! 87: ! 88: .Lfix: ! 89: lwz 3,.Lfixups(11) # fixup pointers start ! 90: lwz 4,.Lfixupe(11) # fixup pointers end ! 91: ! 92: cmpw 1,3,4 # any user pointers to adjust ! 93: bc 12,6,.Ldone ! 94: ! 95: .Lfloop: ! 96: lwz 5,0(3) # next pointer ! 97: lwz 6,0(5) # get the pointer it points to ! 98: add 6,6,12 # adjust ! 99: stw 6,0(5) ! 100: addi 3,3,4 # bump to next word ! 101: cmpw 1,3,4 # more pointers to adjust? ! 102: bc 4,6,.Lfloop ! 103: ! 104: # Done adjusting pointers, return ! 105: ! 106: .Ldone: ! 107: b __do_global_ctors # do any C++ global constructors (which returns to caller) ! 108: ! 109: # Routines for saving floating point registers, called by the compiler. ! 110: # Called with r11 pointing to the stack header word of the caller of the ! 111: # function, just beyond the end of the floating point save area. ! 112: ! 113: .globl _savefpr_14 ! 114: .globl _savefpr_15 ! 115: .globl _savefpr_16 ! 116: .globl _savefpr_17 ! 117: .globl _savefpr_18 ! 118: .globl _savefpr_19 ! 119: .globl _savefpr_20 ! 120: .globl _savefpr_21 ! 121: .globl _savefpr_22 ! 122: .globl _savefpr_23 ! 123: .globl _savefpr_24 ! 124: .globl _savefpr_25 ! 125: .globl _savefpr_26 ! 126: .globl _savefpr_27 ! 127: .globl _savefpr_28 ! 128: .globl _savefpr_29 ! 129: .globl _savefpr_30 ! 130: .globl _savefpr_31 ! 131: ! 132: .long 0x00400000 # traceback tag ! 133: _savefpr_14: stfd 14,-144(11) # save fp registers ! 134: _savefpr_15: stfd 15,-136(11) ! 135: _savefpr_16: stfd 16,-128(11) ! 136: _savefpr_17: stfd 17,-120(11) ! 137: _savefpr_18: stfd 18,-112(11) ! 138: _savefpr_19: stfd 19,-104(11) ! 139: _savefpr_20: stfd 20,-96(11) ! 140: _savefpr_21: stfd 21,-88(11) ! 141: _savefpr_22: stfd 22,-80(11) ! 142: _savefpr_23: stfd 23,-72(11) ! 143: _savefpr_24: stfd 24,-64(11) ! 144: _savefpr_25: stfd 25,-56(11) ! 145: _savefpr_26: stfd 26,-48(11) ! 146: _savefpr_27: stfd 27,-40(11) ! 147: _savefpr_28: stfd 28,-32(11) ! 148: _savefpr_29: stfd 29,-24(11) ! 149: _savefpr_30: stfd 30,-16(11) ! 150: _savefpr_31: stfd 31,-8(11) ! 151: blr ! 152: ! 153: # Routines for saving integer registers, called by the compiler. ! 154: # Called with r11 pointing to the stack header word of the caller of the ! 155: # function, just beyond the end of the integer save area. ! 156: ! 157: .globl _savegpr_14 ! 158: .globl _savegpr_15 ! 159: .globl _savegpr_16 ! 160: .globl _savegpr_17 ! 161: .globl _savegpr_18 ! 162: .globl _savegpr_19 ! 163: .globl _savegpr_20 ! 164: .globl _savegpr_21 ! 165: .globl _savegpr_22 ! 166: .globl _savegpr_23 ! 167: .globl _savegpr_24 ! 168: .globl _savegpr_25 ! 169: .globl _savegpr_26 ! 170: .globl _savegpr_27 ! 171: .globl _savegpr_28 ! 172: .globl _savegpr_29 ! 173: .globl _savegpr_30 ! 174: .globl _savegpr_31 ! 175: ! 176: .long 0x00400000 # traceback tag ! 177: _savegpr_14: stw 14,-72(11) # save gp registers ! 178: _savegpr_15: stw 15,-68(11) ! 179: _savegpr_16: stw 16,-64(11) ! 180: _savegpr_17: stw 17,-60(11) ! 181: _savegpr_18: stw 18,-56(11) ! 182: _savegpr_19: stw 19,-52(11) ! 183: _savegpr_20: stw 20,-48(11) ! 184: _savegpr_21: stw 21,-44(11) ! 185: _savegpr_22: stw 22,-40(11) ! 186: _savegpr_23: stw 23,-36(11) ! 187: _savegpr_24: stw 24,-32(11) ! 188: _savegpr_25: stw 25,-28(11) ! 189: _savegpr_26: stw 26,-24(11) ! 190: _savegpr_27: stw 27,-20(11) ! 191: _savegpr_28: stw 28,-16(11) ! 192: _savegpr_29: stw 29,-12(11) ! 193: _savegpr_30: stw 30,-8(11) ! 194: _savegpr_31: stw 31,-4(11) ! 195: blr ! 196: ! 197: # Routines for restoring floating point registers, called by the compiler. ! 198: # Called with r11 pointing to the stack header word of the caller of the ! 199: # function, just beyond the end of the floating point save area. ! 200: ! 201: .globl _restfpr_14 ! 202: .globl _restfpr_15 ! 203: .globl _restfpr_16 ! 204: .globl _restfpr_17 ! 205: .globl _restfpr_18 ! 206: .globl _restfpr_19 ! 207: .globl _restfpr_20 ! 208: .globl _restfpr_21 ! 209: .globl _restfpr_22 ! 210: .globl _restfpr_23 ! 211: .globl _restfpr_24 ! 212: .globl _restfpr_25 ! 213: .globl _restfpr_26 ! 214: .globl _restfpr_27 ! 215: .globl _restfpr_28 ! 216: .globl _restfpr_29 ! 217: .globl _restfpr_30 ! 218: .globl _restfpr_31 ! 219: ! 220: .long 0x00600000 # traceback tag ! 221: _restfpr_14: lfd 14,-144(11) # restore fp registers ! 222: _restfpr_15: lfd 15,-136(11) ! 223: _restfpr_16: lfd 16,-128(11) ! 224: _restfpr_17: lfd 17,-120(11) ! 225: _restfpr_18: lfd 18,-112(11) ! 226: _restfpr_19: lfd 19,-104(11) ! 227: _restfpr_20: lfd 20,-96(11) ! 228: _restfpr_21: lfd 21,-88(11) ! 229: _restfpr_22: lfd 22,-80(11) ! 230: _restfpr_23: lfd 23,-72(11) ! 231: _restfpr_24: lfd 24,-64(11) ! 232: _restfpr_25: lfd 25,-56(11) ! 233: _restfpr_26: lfd 26,-48(11) ! 234: _restfpr_27: lfd 27,-40(11) ! 235: _restfpr_28: lfd 28,-32(11) ! 236: _restfpr_29: lfd 29,-24(11) ! 237: _restfpr_30: lfd 30,-16(11) ! 238: _restfpr_31: lfd 31,-8(11) ! 239: blr ! 240: ! 241: # Routines for restoring integer registers, called by the compiler. ! 242: # Called with r11 pointing to the stack header word of the caller of the ! 243: # function, just beyond the end of the integer restore area. ! 244: ! 245: .globl _restgpr_14 ! 246: .globl _restgpr_15 ! 247: .globl _restgpr_16 ! 248: .globl _restgpr_17 ! 249: .globl _restgpr_18 ! 250: .globl _restgpr_19 ! 251: .globl _restgpr_20 ! 252: .globl _restgpr_21 ! 253: .globl _restgpr_22 ! 254: .globl _restgpr_23 ! 255: .globl _restgpr_24 ! 256: .globl _restgpr_25 ! 257: .globl _restgpr_26 ! 258: .globl _restgpr_27 ! 259: .globl _restgpr_28 ! 260: .globl _restgpr_29 ! 261: .globl _restgpr_30 ! 262: .globl _restgpr_31 ! 263: ! 264: .long 0x00600000 # traceback tag ! 265: _restgpr_14: lwz 14,-72(11) # rest gp registers ! 266: _restgpr_15: lwz 15,-68(11) ! 267: _restgpr_16: lwz 16,-64(11) ! 268: _restgpr_17: lwz 17,-60(11) ! 269: _restgpr_18: lwz 18,-56(11) ! 270: _restgpr_19: lwz 19,-52(11) ! 271: _restgpr_20: lwz 20,-48(11) ! 272: _restgpr_21: lwz 21,-44(11) ! 273: _restgpr_22: lwz 22,-40(11) ! 274: _restgpr_23: lwz 23,-36(11) ! 275: _restgpr_24: lwz 24,-32(11) ! 276: _restgpr_25: lwz 25,-28(11) ! 277: _restgpr_26: lwz 26,-24(11) ! 278: _restgpr_27: lwz 27,-20(11) ! 279: _restgpr_28: lwz 28,-16(11) ! 280: _restgpr_29: lwz 29,-12(11) ! 281: _restgpr_30: lwz 30,-8(11) ! 282: _restgpr_31: lwz 31,-4(11) ! 283: blr ! 284: ! 285: # Routines for restoring floating point registers, called by the compiler. ! 286: # Called with r11 pointing to the stack header word of the caller of the ! 287: # function, just beyond the end of the floating point save area. ! 288: # In addition to restoring the fp registers, it will return to the caller's ! 289: # caller ! 290: ! 291: .globl _restfpr_14_x ! 292: .globl _restfpr_15_x ! 293: .globl _restfpr_16_x ! 294: .globl _restfpr_17_x ! 295: .globl _restfpr_18_x ! 296: .globl _restfpr_19_x ! 297: .globl _restfpr_20_x ! 298: .globl _restfpr_21_x ! 299: .globl _restfpr_22_x ! 300: .globl _restfpr_23_x ! 301: .globl _restfpr_24_x ! 302: .globl _restfpr_25_x ! 303: .globl _restfpr_26_x ! 304: .globl _restfpr_27_x ! 305: .globl _restfpr_28_x ! 306: .globl _restfpr_29_x ! 307: .globl _restfpr_30_x ! 308: .globl _restfpr_31_x ! 309: ! 310: .long 0x00600000 # traceback tag ! 311: _restfpr_14_x: lfd 14,-144(11) # restore fp registers ! 312: _restfpr_15_x: lfd 15,-136(11) ! 313: _restfpr_16_x: lfd 16,-128(11) ! 314: _restfpr_17_x: lfd 17,-120(11) ! 315: _restfpr_18_x: lfd 18,-112(11) ! 316: _restfpr_19_x: lfd 19,-104(11) ! 317: _restfpr_20_x: lfd 20,-96(11) ! 318: _restfpr_21_x: lfd 21,-88(11) ! 319: _restfpr_22_x: lfd 22,-80(11) ! 320: _restfpr_23_x: lfd 23,-72(11) ! 321: _restfpr_24_x: lfd 24,-64(11) ! 322: _restfpr_25_x: lfd 25,-56(11) ! 323: _restfpr_26_x: lfd 26,-48(11) ! 324: _restfpr_27_x: lfd 27,-40(11) ! 325: _restfpr_28_x: lfd 28,-32(11) ! 326: _restfpr_29_x: lfd 29,-24(11) ! 327: _restfpr_30_x: lfd 30,-16(11) ! 328: _restfpr_31_x: lwz 0,4(11) ! 329: lfd 31,-8(11) ! 330: mtlr 0 ! 331: mr 1,11 ! 332: blr ! 333: ! 334: # Routines for restoring integer registers, called by the compiler. ! 335: # Called with r11 pointing to the stack header word of the caller of the ! 336: # function, just beyond the end of the integer restore area. ! 337: ! 338: .globl _restgpr_14_x ! 339: .globl _restgpr_15_x ! 340: .globl _restgpr_16_x ! 341: .globl _restgpr_17_x ! 342: .globl _restgpr_18_x ! 343: .globl _restgpr_19_x ! 344: .globl _restgpr_20_x ! 345: .globl _restgpr_21_x ! 346: .globl _restgpr_22_x ! 347: .globl _restgpr_23_x ! 348: .globl _restgpr_24_x ! 349: .globl _restgpr_25_x ! 350: .globl _restgpr_26_x ! 351: .globl _restgpr_27_x ! 352: .globl _restgpr_28_x ! 353: .globl _restgpr_29_x ! 354: .globl _restgpr_30_x ! 355: .globl _restgpr_31_x ! 356: ! 357: .long 0x00600000 # traceback tag ! 358: _restgpr_14_x: lwz 14,-72(11) # rest gp registers ! 359: _restgpr_15_x: lwz 15,-68(11) ! 360: _restgpr_16_x: lwz 16,-64(11) ! 361: _restgpr_17_x: lwz 17,-60(11) ! 362: _restgpr_18_x: lwz 18,-56(11) ! 363: _restgpr_19_x: lwz 19,-52(11) ! 364: _restgpr_20_x: lwz 20,-48(11) ! 365: _restgpr_21_x: lwz 21,-44(11) ! 366: _restgpr_22_x: lwz 22,-40(11) ! 367: _restgpr_23_x: lwz 23,-36(11) ! 368: _restgpr_24_x: lwz 24,-32(11) ! 369: _restgpr_25_x: lwz 25,-28(11) ! 370: _restgpr_26_x: lwz 26,-24(11) ! 371: _restgpr_27_x: lwz 27,-20(11) ! 372: _restgpr_28_x: lwz 28,-16(11) ! 373: _restgpr_29_x: lwz 29,-12(11) ! 374: _restgpr_30_x: lwz 30,-8(11) ! 375: _restgpr_31_x: lwz 0,4(11) ! 376: lwz 31,-4(11) ! 377: mtlr 0 ! 378: mr 1,11 ! 379: blr
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