1 //===- ARMFixupKinds.h ----------------------------------------------------===// 2 // 3 // The MCLinker Project 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 #ifndef MCLD_LIB_TARGET_ARM_ARM_FIXUP_KINDS_H_ 10 #define MCLD_LIB_TARGET_ARM_ARM_FIXUP_KINDS_H_ 11 12 #include <llvm/MC/MCFixup.h> 13 14 namespace mcld { 15 namespace ARM { 16 17 enum Fixups { 18 // fixup_arm_ldst_pcrel_12 - 12-bit PC relative relocation for symbol 19 // addresses 20 fixup_arm_ldst_pcrel_12 = FirstTargetFixupKind, 21 22 // fixup_t2_ldst_pcrel_12 - Equivalent to fixup_arm_ldst_pcrel_12, with 23 // the 16-bit halfwords reordered. 24 fixup_t2_ldst_pcrel_12, 25 26 // fixup_arm_pcrel_10 - 10-bit PC relative relocation for symbol addresses 27 // used in VFP instructions where the lower 2 bits are not encoded 28 // (so it's encoded as an 8-bit immediate). 29 fixup_arm_pcrel_10, 30 // fixup_t2_pcrel_10 - Equivalent to fixup_arm_pcrel_10, accounting for 31 // the short-swapped encoding of Thumb2 instructions. 32 fixup_t2_pcrel_10, 33 // fixup_thumb_adr_pcrel_10 - 10-bit PC relative relocation for symbol 34 // addresses where the lower 2 bits are not encoded (so it's encoded as an 35 // 8-bit immediate). 36 fixup_thumb_adr_pcrel_10, 37 // fixup_arm_adr_pcrel_12 - 12-bit PC relative relocation for the ADR 38 // instruction. 39 fixup_arm_adr_pcrel_12, 40 // fixup_t2_adr_pcrel_12 - 12-bit PC relative relocation for the ADR 41 // instruction. 42 fixup_t2_adr_pcrel_12, 43 // fixup_arm_condbranch - 24-bit PC relative relocation for conditional branch 44 // instructions. 45 fixup_arm_condbranch, 46 // fixup_arm_uncondbranch - 24-bit PC relative relocation for 47 // branch instructions. (unconditional) 48 fixup_arm_uncondbranch, 49 // fixup_t2_condbranch - 20-bit PC relative relocation for Thumb2 direct 50 // unconditional branch instructions. 51 fixup_t2_condbranch, 52 // fixup_t2_uncondbranch - 20-bit PC relative relocation for Thumb2 direct 53 // branch unconditional branch instructions. 54 fixup_t2_uncondbranch, 55 56 // fixup_arm_thumb_br - 12-bit fixup for Thumb B instructions. 57 fixup_arm_thumb_br, 58 59 // fixup_arm_thumb_bl - Fixup for Thumb BL instructions. 60 fixup_arm_thumb_bl, 61 62 // fixup_arm_thumb_blx - Fixup for Thumb BLX instructions. 63 fixup_arm_thumb_blx, 64 65 // fixup_arm_thumb_cb - Fixup for Thumb branch instructions. 66 fixup_arm_thumb_cb, 67 68 // fixup_arm_thumb_cp - Fixup for Thumb load/store from constant pool instrs. 69 fixup_arm_thumb_cp, 70 71 // fixup_arm_thumb_bcc - Fixup for Thumb conditional branching instructions. 72 fixup_arm_thumb_bcc, 73 74 // The next two are for the movt/movw pair 75 // the 16bit imm field are split into imm{15-12} and imm{11-0} 76 fixup_arm_movt_hi16, // :upper16: 77 fixup_arm_movw_lo16, // :lower16: 78 fixup_t2_movt_hi16, // :upper16: 79 fixup_t2_movw_lo16, // :lower16: 80 81 // It is possible to create an "immediate" that happens to be pcrel. 82 // movw r0, :lower16:Foo-(Bar+8) and movt r0, :upper16:Foo-(Bar+8) 83 // result in different reloc tags than the above two. 84 // Needed to support ELF::R_ARM_MOVT_PREL and ELF::R_ARM_MOVW_PREL_NC 85 fixup_arm_movt_hi16_pcrel, // :upper16: 86 fixup_arm_movw_lo16_pcrel, // :lower16: 87 fixup_t2_movt_hi16_pcrel, // :upper16: 88 fixup_t2_movw_lo16_pcrel, // :lower16: 89 90 // Marker 91 LastTargetFixupKind, 92 NumTargetFixupKinds = LastTargetFixupKind - FirstTargetFixupKind 93 }; 94 95 } // namespace ARM 96 } // namespace mcld 97 98 #endif 99
