diff options
Diffstat (limited to 'lib/Target/ARM/MCTargetDesc/ARMFixupKinds.h')
| -rw-r--r-- | lib/Target/ARM/MCTargetDesc/ARMFixupKinds.h | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/lib/Target/ARM/MCTargetDesc/ARMFixupKinds.h b/lib/Target/ARM/MCTargetDesc/ARMFixupKinds.h index 1827986..0085feb 100644 --- a/lib/Target/ARM/MCTargetDesc/ARMFixupKinds.h +++ b/lib/Target/ARM/MCTargetDesc/ARMFixupKinds.h @@ -59,8 +59,21 @@ enum Fixups { // fixup_arm_thumb_br - 12-bit fixup for Thumb B instructions. fixup_arm_thumb_br, - // fixup_arm_bl - Fixup for ARM BL instructions. - fixup_arm_bl, + // The following fixups handle the ARM BL instructions. These can be + // conditionalised; however, the ARM ELF ABI requires a different relocation + // in that case: R_ARM_JUMP24 instead of R_ARM_CALL. The difference is that + // R_ARM_CALL is allowed to change the instruction to a BLX inline, which has + // no conditional version; R_ARM_JUMP24 would have to insert a veneer. + // + // MachO does not draw a distinction between the two cases, so it will treat + // fixup_arm_uncondbl and fixup_arm_condbl as identical fixups. + + // fixup_arm_uncondbl - Fixup for unconditional ARM BL instructions. + fixup_arm_uncondbl, + + // fixup_arm_condbl - Fixup for ARM BL instructions with nontrivial + // conditionalisation. + fixup_arm_condbl, // fixup_arm_blx - Fixup for ARM BLX instructions. fixup_arm_blx, |