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[ELF][MIPS] Support R_MIPS_GOT_HI16 / R_MIPS_GOT_LO16 relocations calculation 

llvm-svn: 279119
This commit is contained in:
Simon Atanasyan 2016-08-18 19:08:41 +00:00
parent e933a8e212
commit 978f91ca43
2 changed files with 68 additions and 0 deletions
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4
lld/ELF/Target.cpp
View File

@ -1904,6 +1904,8 @@ RelExpr MipsTargetInfo<ELFT>::getRelExpr(uint32_t Type,
case R_MIPS_CALL_HI16:
case R_MIPS_CALL_LO16:
case R_MIPS_GOT_DISP:
case R_MIPS_GOT_HI16:
case R_MIPS_GOT_LO16:
case R_MIPS_TLS_GOTTPREL:
return R_MIPS_GOT_OFF;
case R_MIPS_GOT_PAGE:
@ -2131,6 +2133,7 @@ void MipsTargetInfo<ELFT>::relocateOne(uint8_t *Loc, uint32_t Type,
// fallthrough
case R_MIPS_CALL16:
case R_MIPS_CALL_LO16:
case R_MIPS_GOT_LO16:
case R_MIPS_GOT_OFST:
case R_MIPS_LO16:
case R_MIPS_PCLO16:
@ -2140,6 +2143,7 @@ void MipsTargetInfo<ELFT>::relocateOne(uint8_t *Loc, uint32_t Type,
writeMipsLo16<E>(Loc, Val);
break;
case R_MIPS_CALL_HI16:
case R_MIPS_GOT_HI16:
case R_MIPS_HI16:
case R_MIPS_PCHI16:
case R_MIPS_TLS_DTPREL_HI16:

64
lld/test/ELF/mips-got-hilo.s Normal file
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@ -0,0 +1,64 @@
# Check R_MIPS_GOT_HI16 / R_MIPS_GOT_LO16 relocations calculation.
# RUN: llvm-mc -filetype=obj -triple=mips-unknown-linux %s -o %t.o
# RUN: ld.lld %t.o -shared -o %t.so
# RUN: llvm-objdump -d %t.so | FileCheck %s
# RUN: llvm-readobj -r -mips-plt-got %t.so | FileCheck -check-prefix=GOT %s
# REQUIRES: mips
# CHECK: Disassembly of section .text:
# CHECK-NEXT: foo:
# CHECK-NEXT: 10000: 3c 02 00 00 lui $2, 0
# CHECK-NEXT: 10004: 8c 42 80 20 lw $2, -32736($2)
# CHECK-NEXT: 10008: 3c 02 00 00 lui $2, 0
# CHECK-NEXT: 1000c: 8c 42 80 18 lw $2, -32744($2)
# CHECK-NEXT: 10010: 3c 02 00 00 lui $2, 0
# CHECK-NEXT: 10014: 8c 42 80 1c lw $2, -32740($2)
# GOT: Relocations [
# GOT-NEXT: ]
# GOT: Primary GOT {
# GOT-NEXT: Canonical gp value: 0x27FF0
# GOT: Local entries [
# GOT-NEXT: Entry {
# GOT-NEXT: Address: 0x20008
# GOT-NEXT: Access: -32744
# GOT-NEXT: Initial: 0x30000
# GOT-NEXT: }
# GOT-NEXT: Entry {
# GOT-NEXT: Address: 0x2000C
# GOT-NEXT: Access: -32740
# GOT-NEXT: Initial: 0x30004
# GOT-NEXT: }
# GOT-NEXT: ]
# GOT-NEXT: Global entries [
# GOT-NEXT: Entry {
# GOT-NEXT: Address: 0x20010
# GOT-NEXT: Access: -32736
# GOT-NEXT: Initial: 0x0
# GOT-NEXT: Value: 0x0
# GOT-NEXT: Type: None
# GOT-NEXT: Section: Undefined
# GOT-NEXT: Name: bar
# GOT-NEXT: }
# GOT-NEXT: ]
# GOT-NEXT: Number of TLS and multi-GOT entries: 0
# GOT-NEXT: }
.text
.global foo
foo:
lui $2, %got_hi(bar)
lw $2, %got_lo(bar)($2)
lui $2, %got_hi(loc1)
lw $2, %got_lo(loc1)($2)
lui $2, %got_hi(loc2)
lw $2, %got_lo(loc2)($2)
.data
loc1:
.word 0
loc2:
.word 0