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RuntimeDyldELF: add LDST8_ABS_LO12_NC and LDST16_ABS_LO12_NC relocs 

Differential revision: https://reviews.llvm.org/D28863

llvm-svn: 292785
This commit is contained in:
Eugene Leviant 2017-01-23 13:13:47 +00:00
parent bb13fdabec
commit e33d2ce8e3
2 changed files with 22 additions and 4 deletions
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14
llvm/lib/ExecutionEngine/RuntimeDyld/RuntimeDyldELF.cpp
View File

@ -419,6 +419,18 @@ void RuntimeDyldELF::resolveAArch64Relocation(const SectionEntry &Section,
// from bits 11:0 of X
or32AArch64Imm(TargetPtr, Value + Addend);
break;
case ELF::R_AARCH64_LDST8_ABS_LO12_NC:
// Operation: S + A
// Immediate goes in bits 21:10 of LD/ST instruction, taken
// from bits 11:0 of X
or32AArch64Imm(TargetPtr, getBits(Value + Addend, 0, 11));
break;
case ELF::R_AARCH64_LDST16_ABS_LO12_NC:
// Operation: S + A
// Immediate goes in bits 21:10 of LD/ST instruction, taken
// from bits 11:1 of X
or32AArch64Imm(TargetPtr, getBits(Value + Addend, 1, 11));
break;
case ELF::R_AARCH64_LDST32_ABS_LO12_NC:
// Operation: S + A
// Immediate goes in bits 21:10 of LD/ST instruction, taken
@ -900,7 +912,7 @@ uint32_t RuntimeDyldELF::getMatchingLoRelocation(uint32_t RelType,
}
// Sometimes we don't need to create thunk for a branch.
// This typically happens when branch target is located
// This typically happens when branch target is located
// in the same object file. In such case target is either
// a weak symbol or symbol in a different executable section.
// This function checks if branch target is located in the

12
llvm/test/ExecutionEngine/RuntimeDyld/AArch64/ELF_ARM64_relocations.s
View File

@ -20,6 +20,10 @@ g:
# R_AARCH64_MOVW_UABS_G0_NC
movk x0, #:abs_g0_nc:f
l:
# R_AARCH64_LDST8_ABS_LO12_NC
ldrsb x4, [x5, :lo12:a+1]
# R_AARCH64_LDST16_ABS_LO12_NC
ldrh w4, [x5, :lo12:a+2]
# R_AARCH64_LDST32_ABS_LO12_NC
ldr s4, [x5, :lo12:a]
# R_AARCH64_LDST64_ABS_LO12_NC
@ -57,9 +61,11 @@ r:
# rtdyld-check: *{4}(g + 8) = 0xf2b13560
# rtdyld-check: *{4}(g + 12) = 0xf299bde0
## Check LDST32_ABS_LO12_NC and LDST64_ABS_LO12_NC
# rtdyld-check: (*{4}l)[21:10] = a[11:2]
# rtdyld-check: (*{4}(l+4))[21:10] = a[11:3]
## Check LDSTXX_ABS_LO12_NC
# rtdyld-check: (*{4}l)[21:10] = (a+1)[11:0]
# rtdyld-check: (*{4}(l+4))[21:10] = (a+2)[11:1]
# rtdyld-check: (*{4}(l+8))[21:10] = a[11:2]
# rtdyld-check: (*{4}(l+12))[21:10] = a[11:3]
## Check ADR_PREL_PG_HI21. Low order bits of immediate value
## go to bits 30:29. High order bits go to bits 23:5