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llvm-project/lld/test/ELF/mips-hilo-gp-disp.s

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[ELF] Move `# REQUIRES:` line to the top llvm-svn: 335625
2018-06-27 00:58:19 +08:00
# REQUIRES: mips
[ELF][MIPS] Handle R_MIPS_HI16/LO16 relocations against _gp_disp symbol The `_gp_disp` is a magic symbol designates offset between start of function and gp pointer into GOT. Only `R_MIPS_HI16` and `R_MIPS_LO16` relocations are permitted with `_gp_disp`. The patch adds the `_gp_disp` as an ignored symbol and adjusts symbol value before call the `relocateOne` for `R_MIPS_HI16/LO16` relocations. Differential Revision: http://reviews.llvm.org/D15480 llvm-svn: 255768
2015-12-16 22:45:09 +08:00
# Check R_MIPS_HI16 / LO16 relocations calculation against _gp_disp.
[mips] Make another set of test cases more tolerant to exact symbol addresses. NFC llvm-svn: 371313
2019-09-07 23:44:40 +08:00
# RUN: echo "SECTIONS { \
# RUN: . = 0x10000; .text ALIGN(0x1000) : { *(.text) } \
# RUN: . = 0x30000; .got : { *(.got) } \
# RUN: }" > %t.script
[ELF][MIPS] Handle R_MIPS_HI16/LO16 relocations against _gp_disp symbol The `_gp_disp` is a magic symbol designates offset between start of function and gp pointer into GOT. Only `R_MIPS_HI16` and `R_MIPS_LO16` relocations are permitted with `_gp_disp`. The patch adds the `_gp_disp` as an ignored symbol and adjusts symbol value before call the `relocateOne` for `R_MIPS_HI16/LO16` relocations. Differential Revision: http://reviews.llvm.org/D15480 llvm-svn: 255768
2015-12-16 22:45:09 +08:00
# RUN: llvm-mc -filetype=obj -triple=mips-unknown-linux %s -o %t1.o
# RUN: llvm-mc -filetype=obj -triple=mips-unknown-linux \
# RUN: %S/Inputs/mips-dynamic.s -o %t2.o
[mips] Make another set of test cases more tolerant to exact symbol addresses. NFC llvm-svn: 371313
2019-09-07 23:44:40 +08:00
# RUN: ld.lld %t1.o %t2.o --script %t.script -o %t.exe
# RUN: llvm-objdump -d -t --no-show-raw-insn %t.exe | FileCheck %s
# RUN: ld.lld %t1.o %t2.o -shared --script %t.script -o %t.so
# RUN: llvm-objdump -d -t --no-show-raw-insn %t.so | FileCheck %s
[ELF][MIPS] Handle R_MIPS_HI16/LO16 relocations against _gp_disp symbol The `_gp_disp` is a magic symbol designates offset between start of function and gp pointer into GOT. Only `R_MIPS_HI16` and `R_MIPS_LO16` relocations are permitted with `_gp_disp`. The patch adds the `_gp_disp` as an ignored symbol and adjusts symbol value before call the `relocateOne` for `R_MIPS_HI16/LO16` relocations. Differential Revision: http://reviews.llvm.org/D15480 llvm-svn: 255768
2015-12-16 22:45:09 +08:00
.text
.globl __start
__start:
lui $t0,%hi(_gp_disp)
addi $t0,$t0,%lo(_gp_disp)
lw $v0,%call16(_foo)($gp)
[ELF][MIPS] Make R_MIPS_LO16 a relative relocation if it references _gp_disp symbol The _gp_disp symbol designates offset between start of function and 'gp' pointer into GOT. The following code is a typical MIPS function preamble used to setup $gp register: lui $gp, %hi(_gp_disp) addi $gp, $gp, %lo(_gp_disp) To calculate R_MIPS_HI16 / R_MIPS_LO16 relocations results we use the following formulas: %hi(_gp - P + A) %lo(_gp - P + A + 4), where _gp is a value of _gp symbol, A is addend, and P current address. The R_MIPS_LO16 relocation references _gp_disp symbol is always the second instruction. That is why we need four byte adjustments. The patch assigns R_PC type for R_MIPS_LO16 relocation and adjusts its addend by 4. That fix R_MIPS_LO16 calculation. For details see p. 4-19 at ftp://www.linux-mips.org/pub/linux/mips/doc/ABI/mipsabi.pdf Differential Revision: http://reviews.llvm.org/D19115 llvm-svn: 266368
2016-04-15 05:10:05 +08:00
bar:
lui $t0,%hi(_gp_disp)
addi $t0,$t0,%lo(_gp_disp)
[ELF][MIPS] Handle R_MIPS_HI16/LO16 relocations against _gp_disp symbol The `_gp_disp` is a magic symbol designates offset between start of function and gp pointer into GOT. Only `R_MIPS_HI16` and `R_MIPS_LO16` relocations are permitted with `_gp_disp`. The patch adds the `_gp_disp` as an ignored symbol and adjusts symbol value before call the `relocateOne` for `R_MIPS_HI16/LO16` relocations. Differential Revision: http://reviews.llvm.org/D15480 llvm-svn: 255768
2015-12-16 22:45:09 +08:00
[llvm-objdump] Further rearrange llvm-objdump sections for compatability Summary: rL371826 rearranged some output from llvm-objdump for GNU objdump compatability, but there still seem to be some more. I think this rearrangement is a little closer. Overview of the ordering which matches GNU objdump: * Archive headers * File headers * Section headers * Symbol table * Dwarf debugging * Relocations (if `--disassemble` is not used) * Section contents * Disassembly Reviewers: jhenderson, justice_adams, grimar, ychen, espindola Reviewed By: jhenderson Subscribers: aprantl, emaste, arichardson, jrtc27, atanasyan, seiya, llvm-commits, MaskRay Tags: #llvm Differential Revision: https://reviews.llvm.org/D68066 llvm-svn: 373671
2019-10-04 06:01:08 +08:00
# CHECK: SYMBOL TABLE:
[llvm-objdump] --syms: make flags closer to GNU objdump This fixes several issues. The behavior changes are: A SHN_COMMON symbol does not have the 'g' flag. An undefined symbol does not have 'g' or 'l' flag. A STB_GLOBAL SymbolRef::ST_Unknown symbol has the 'g' flag. A STB_LOCAL SymbolRef::ST_Unknown symbol has the 'l' flag. Reviewed By: rupprecht Differential Revision: https://reviews.llvm.org/D75659
2020-03-05 09:19:18 +08:00
# CHECK: 0001100c l .text 00000000 bar
# CHECK: 00037ff0 l .got 00000000 .hidden _gp
# CHECK: 00011000 g .text 00000000 __start
[llvm-objdump] Further rearrange llvm-objdump sections for compatability Summary: rL371826 rearranged some output from llvm-objdump for GNU objdump compatability, but there still seem to be some more. I think this rearrangement is a little closer. Overview of the ordering which matches GNU objdump: * Archive headers * File headers * Section headers * Symbol table * Dwarf debugging * Relocations (if `--disassemble` is not used) * Section contents * Disassembly Reviewers: jhenderson, justice_adams, grimar, ychen, espindola Reviewed By: jhenderson Subscribers: aprantl, emaste, arichardson, jrtc27, atanasyan, seiya, llvm-commits, MaskRay Tags: #llvm Differential Revision: https://reviews.llvm.org/D68066 llvm-svn: 373671
2019-10-04 06:01:08 +08:00
[mips] Make another set of test cases more tolerant to exact symbol addresses. NFC llvm-svn: 371313
2019-09-07 23:44:40 +08:00
# CHECK: Disassembly of section .text:
# CHECK-EMPTY:
[llvm-objdump] -d: print `00000000 <foo>:` instead of `00000000 foo:` The new behavior matches GNU objdump. A pair of angle brackets makes tests slightly easier. `.foo:` is not unique and thus cannot be used in a `CHECK-LABEL:` directive. Without `-LABEL`, the CHECK line can match the `Disassembly of section` line and causes the next `CHECK-NEXT:` to fail. ``` Disassembly of section .foo: 0000000000001634 .foo: ``` Bdragon: <> has metalinguistic connotation. it just "feels right" Reviewed By: rupprecht Differential Revision: https://reviews.llvm.org/D75713
2020-03-06 06:18:38 +08:00
# CHECK-NEXT: <__start>:
[mips] Make another set of test cases more tolerant to exact symbol addresses. NFC llvm-svn: 371313
2019-09-07 23:44:40 +08:00
# CHECK-NEXT: 11000: lui $8, 2
# ^-- %hi(0x37ff0-0x11000)
# CHECK-NEXT: 11004: addi $8, $8, 28656
# ^-- %lo(0x37ff0-0x11004+4)
[llvm-objdump] -d: print `00000000 <foo>:` instead of `00000000 foo:` The new behavior matches GNU objdump. A pair of angle brackets makes tests slightly easier. `.foo:` is not unique and thus cannot be used in a `CHECK-LABEL:` directive. Without `-LABEL`, the CHECK line can match the `Disassembly of section` line and causes the next `CHECK-NEXT:` to fail. ``` Disassembly of section .foo: 0000000000001634 .foo: ``` Bdragon: <> has metalinguistic connotation. it just "feels right" Reviewed By: rupprecht Differential Revision: https://reviews.llvm.org/D75713
2020-03-06 06:18:38 +08:00
# CHECK: <bar>:
[mips] Make another set of test cases more tolerant to exact symbol addresses. NFC llvm-svn: 371313
2019-09-07 23:44:40 +08:00
# CHECK-NEXT: 1100c: lui $8, 2
# ^-- %hi(0x37ff0-0x1100c)
# CHECK-NEXT: 11010: addi $8, $8, 28644
# ^-- %lo(0x37ff0-0x11010+4)