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llvm-project/lld/test/ELF/mips-gprel32-relocs.s

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[ELF][MIPS] Implement R_MIPS_GPREL16/R_MIPS_GPREL32 relocations The R_MIPS_GPREL16 / R_MIPS_GPREL32 relocations use the following expressions for calculations: ``` local symbol: S + A + GP0 - GP global symbol: S + A - GP GP - Represents the final gp value, i.e. _gp symbol GP0 - Represents the gp value used to create the relocatable object ``` The GP0 value is taken from the .reginfo data section defined by an object file. To implement that I keep a reference to `MipsReginfoInputSection` in the `ObjectFile` class. This reference is used by the `ObjectFile::getMipsGp0` method to return the GP0 value. Differential Revision: http://reviews.llvm.org/D15760 llvm-svn: 256416
2015-12-25 21:02:13 +08:00
# Check R_MIPS_GPREL32 relocation calculation.
# RUN: llvm-mc -filetype=obj -triple=mips-unknown-linux %s -o %t.o
# RUN: ld.lld -shared -o %t.so %t.o
# RUN: llvm-objdump -s -section=.rodata -t %t.so | FileCheck %s
# REQUIRES: mips
.text
.globl __start
__start:
lw $t0,%call16(__start)($gp)
foo:
nop
bar:
nop
.section .rodata, "a"
v1:
.gpword foo
.gpword bar
# CHECK: Contents of section .rodata:
# CHECK: 0114 fffe8014 fffe8018
# ^ 0x10004 - 0x27ff0
# ^ 0x10008 - 0x27ff0
# CHECK: SYMBOL TABLE:
# CHECK: 00010008 .text 00000000 bar
# CHECK: 00010004 .text 00000000 foo
ELF: Use hidden visibility for all DefinedSynthetic symbols. This simplifies the code by allowing us to remove the visibility argument to functions that create synthetic symbols. The only functional change is that the visibility of the MIPS "_gp" symbol is now hidden. Because this symbol is defined in every executable or DSO, it would be difficult to observe a visibility change here. Differential Revision: http://reviews.llvm.org/D19033 llvm-svn: 266208
2016-04-14 00:57:28 +08:00
# CHECK: 00027ff0 .got 00000000 .hidden _gp