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llvm-project/lld/test/ELF/riscv-plt.s

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[ELF][RISCV] Support PLT, GOT, copy and relative relocations * Handle initial relocation types: R_RISCV_CALL_PLT and R_RISCV_GOT_HI20. * Produce dynamic relocation types: R_RISCV_COPY, R_RISCV_RELATIVE, R_RISCV_JUMP_SLOT. * Define SymbolRel as R_RISCV_{32,64} * Generate PLT header: it is used by lazy binding PLT in glibc. * R_RISCV_CALL is changed from R_PC to R_PC_PLT. If the target symbol is preemptable, this will suppress an unnecessary "canonical PLT". This behavior is different from ld.bfd but it is agreed the current lld behavior is favored. I have received positive responses from the binutils maintainer that the ABI/binutils implementation can be improved, see: https://github.com/riscv/riscv-elf-psabi-doc/issues/98 https://sourceware.org/bugzilla/show_bug.cgi?id=24685 Many -no-pie/-pie/-shared programs linked against musl or glibc should work with this patch. Reviewed By: jrtc27 Differential Revision: https://reviews.llvm.org/D63076 llvm-svn: 364812
2019-07-02 01:12:18 +08:00
# REQUIRES: riscv
# RUN: echo '.globl bar, weak; .type bar,@function; .type weak,@function; bar: weak:' > %t1.s
# RUN: llvm-mc -filetype=obj -triple=riscv32 %t1.s -o %t1.32.o
[ELF][RISCV] Allow PT_LOAD to have overlapping p_offset ranges on EM_RISCV Port the D64906 technique to RISC-V. It deletes 3 alignments at PT_LOAD boundaries for the default case: the size of a RISC-V binary decreases by at most 12kb. llvm-svn: 370192
2019-08-28 20:06:06 +08:00
# RUN: ld.lld -shared %t1.32.o -soname=t1.32.so -o %t1.32.so
[ELF][RISCV] Support PLT, GOT, copy and relative relocations * Handle initial relocation types: R_RISCV_CALL_PLT and R_RISCV_GOT_HI20. * Produce dynamic relocation types: R_RISCV_COPY, R_RISCV_RELATIVE, R_RISCV_JUMP_SLOT. * Define SymbolRel as R_RISCV_{32,64} * Generate PLT header: it is used by lazy binding PLT in glibc. * R_RISCV_CALL is changed from R_PC to R_PC_PLT. If the target symbol is preemptable, this will suppress an unnecessary "canonical PLT". This behavior is different from ld.bfd but it is agreed the current lld behavior is favored. I have received positive responses from the binutils maintainer that the ABI/binutils implementation can be improved, see: https://github.com/riscv/riscv-elf-psabi-doc/issues/98 https://sourceware.org/bugzilla/show_bug.cgi?id=24685 Many -no-pie/-pie/-shared programs linked against musl or glibc should work with this patch. Reviewed By: jrtc27 Differential Revision: https://reviews.llvm.org/D63076 llvm-svn: 364812
2019-07-02 01:12:18 +08:00
# RUN: llvm-mc -filetype=obj -triple=riscv32 %s -o %t.32.o
[ELF][RISCV] Allow PT_LOAD to have overlapping p_offset ranges on EM_RISCV Port the D64906 technique to RISC-V. It deletes 3 alignments at PT_LOAD boundaries for the default case: the size of a RISC-V binary decreases by at most 12kb. llvm-svn: 370192
2019-08-28 20:06:06 +08:00
# RUN: ld.lld %t.32.o %t1.32.so -z separate-code -o %t.32
[ELF][RISCV] Support PLT, GOT, copy and relative relocations * Handle initial relocation types: R_RISCV_CALL_PLT and R_RISCV_GOT_HI20. * Produce dynamic relocation types: R_RISCV_COPY, R_RISCV_RELATIVE, R_RISCV_JUMP_SLOT. * Define SymbolRel as R_RISCV_{32,64} * Generate PLT header: it is used by lazy binding PLT in glibc. * R_RISCV_CALL is changed from R_PC to R_PC_PLT. If the target symbol is preemptable, this will suppress an unnecessary "canonical PLT". This behavior is different from ld.bfd but it is agreed the current lld behavior is favored. I have received positive responses from the binutils maintainer that the ABI/binutils implementation can be improved, see: https://github.com/riscv/riscv-elf-psabi-doc/issues/98 https://sourceware.org/bugzilla/show_bug.cgi?id=24685 Many -no-pie/-pie/-shared programs linked against musl or glibc should work with this patch. Reviewed By: jrtc27 Differential Revision: https://reviews.llvm.org/D63076 llvm-svn: 364812
2019-07-02 01:12:18 +08:00
# RUN: llvm-readelf -S -s %t.32 | FileCheck --check-prefixes=SEC,NM %s
# RUN: llvm-readobj -r %t.32 | FileCheck --check-prefix=RELOC32 %s
# RUN: llvm-readelf -x .got.plt %t.32 | FileCheck --check-prefix=GOTPLT32 %s
# RUN: llvm-objdump -d --no-show-raw-insn %t.32 | FileCheck --check-prefixes=DIS,DIS32 %s
# RUN: llvm-mc -filetype=obj -triple=riscv64 %t1.s -o %t1.64.o
[ELF][RISCV] Allow PT_LOAD to have overlapping p_offset ranges on EM_RISCV Port the D64906 technique to RISC-V. It deletes 3 alignments at PT_LOAD boundaries for the default case: the size of a RISC-V binary decreases by at most 12kb. llvm-svn: 370192
2019-08-28 20:06:06 +08:00
# RUN: ld.lld -shared %t1.64.o -soname=t1.64.so -o %t1.64.so
[ELF][RISCV] Support PLT, GOT, copy and relative relocations * Handle initial relocation types: R_RISCV_CALL_PLT and R_RISCV_GOT_HI20. * Produce dynamic relocation types: R_RISCV_COPY, R_RISCV_RELATIVE, R_RISCV_JUMP_SLOT. * Define SymbolRel as R_RISCV_{32,64} * Generate PLT header: it is used by lazy binding PLT in glibc. * R_RISCV_CALL is changed from R_PC to R_PC_PLT. If the target symbol is preemptable, this will suppress an unnecessary "canonical PLT". This behavior is different from ld.bfd but it is agreed the current lld behavior is favored. I have received positive responses from the binutils maintainer that the ABI/binutils implementation can be improved, see: https://github.com/riscv/riscv-elf-psabi-doc/issues/98 https://sourceware.org/bugzilla/show_bug.cgi?id=24685 Many -no-pie/-pie/-shared programs linked against musl or glibc should work with this patch. Reviewed By: jrtc27 Differential Revision: https://reviews.llvm.org/D63076 llvm-svn: 364812
2019-07-02 01:12:18 +08:00
# RUN: llvm-mc -filetype=obj -triple=riscv64 %s -o %t.64.o
[ELF][RISCV] Allow PT_LOAD to have overlapping p_offset ranges on EM_RISCV Port the D64906 technique to RISC-V. It deletes 3 alignments at PT_LOAD boundaries for the default case: the size of a RISC-V binary decreases by at most 12kb. llvm-svn: 370192
2019-08-28 20:06:06 +08:00
# RUN: ld.lld %t.64.o %t1.64.so -z separate-code -o %t.64
[ELF][RISCV] Support PLT, GOT, copy and relative relocations * Handle initial relocation types: R_RISCV_CALL_PLT and R_RISCV_GOT_HI20. * Produce dynamic relocation types: R_RISCV_COPY, R_RISCV_RELATIVE, R_RISCV_JUMP_SLOT. * Define SymbolRel as R_RISCV_{32,64} * Generate PLT header: it is used by lazy binding PLT in glibc. * R_RISCV_CALL is changed from R_PC to R_PC_PLT. If the target symbol is preemptable, this will suppress an unnecessary "canonical PLT". This behavior is different from ld.bfd but it is agreed the current lld behavior is favored. I have received positive responses from the binutils maintainer that the ABI/binutils implementation can be improved, see: https://github.com/riscv/riscv-elf-psabi-doc/issues/98 https://sourceware.org/bugzilla/show_bug.cgi?id=24685 Many -no-pie/-pie/-shared programs linked against musl or glibc should work with this patch. Reviewed By: jrtc27 Differential Revision: https://reviews.llvm.org/D63076 llvm-svn: 364812
2019-07-02 01:12:18 +08:00
# RUN: llvm-readelf -S -s %t.64 | FileCheck --check-prefixes=SEC,NM %s
# RUN: llvm-readobj -r %t.64 | FileCheck --check-prefix=RELOC64 %s
# RUN: llvm-readelf -x .got.plt %t.64 | FileCheck --check-prefix=GOTPLT64 %s
# RUN: llvm-objdump -d --no-show-raw-insn %t.64 | FileCheck --check-prefixes=DIS,DIS64 %s
# SEC: .plt PROGBITS {{0*}}00011030
## A canonical PLT has a non-zero st_value. bar and weak are called but their
## addresses are not taken, so a canonical PLT is not necessary.
# NM: {{0*}}00000000 0 FUNC GLOBAL DEFAULT UND bar
# NM: {{0*}}00000000 0 FUNC WEAK DEFAULT UND weak
## The .got.plt slots relocated by .rela.plt point to .plt
## This is required by glibc.
# RELOC32: .rela.plt {
[ELF][RISCV] Allow PT_LOAD to have overlapping p_offset ranges on EM_RISCV Port the D64906 technique to RISC-V. It deletes 3 alignments at PT_LOAD boundaries for the default case: the size of a RISC-V binary decreases by at most 12kb. llvm-svn: 370192
2019-08-28 20:06:06 +08:00
# RELOC32-NEXT: 0x13070 R_RISCV_JUMP_SLOT bar 0x0
# RELOC32-NEXT: 0x13074 R_RISCV_JUMP_SLOT weak 0x0
[ELF][RISCV] Support PLT, GOT, copy and relative relocations * Handle initial relocation types: R_RISCV_CALL_PLT and R_RISCV_GOT_HI20. * Produce dynamic relocation types: R_RISCV_COPY, R_RISCV_RELATIVE, R_RISCV_JUMP_SLOT. * Define SymbolRel as R_RISCV_{32,64} * Generate PLT header: it is used by lazy binding PLT in glibc. * R_RISCV_CALL is changed from R_PC to R_PC_PLT. If the target symbol is preemptable, this will suppress an unnecessary "canonical PLT". This behavior is different from ld.bfd but it is agreed the current lld behavior is favored. I have received positive responses from the binutils maintainer that the ABI/binutils implementation can be improved, see: https://github.com/riscv/riscv-elf-psabi-doc/issues/98 https://sourceware.org/bugzilla/show_bug.cgi?id=24685 Many -no-pie/-pie/-shared programs linked against musl or glibc should work with this patch. Reviewed By: jrtc27 Differential Revision: https://reviews.llvm.org/D63076 llvm-svn: 364812
2019-07-02 01:12:18 +08:00
# RELOC32-NEXT: }
# GOTPLT32: section '.got.plt'
[ELF][RISCV] Allow PT_LOAD to have overlapping p_offset ranges on EM_RISCV Port the D64906 technique to RISC-V. It deletes 3 alignments at PT_LOAD boundaries for the default case: the size of a RISC-V binary decreases by at most 12kb. llvm-svn: 370192
2019-08-28 20:06:06 +08:00
# GOTPLT32-NEXT: 0x00013068 00000000 00000000 30100100 30100100
[ELF][RISCV] Support PLT, GOT, copy and relative relocations * Handle initial relocation types: R_RISCV_CALL_PLT and R_RISCV_GOT_HI20. * Produce dynamic relocation types: R_RISCV_COPY, R_RISCV_RELATIVE, R_RISCV_JUMP_SLOT. * Define SymbolRel as R_RISCV_{32,64} * Generate PLT header: it is used by lazy binding PLT in glibc. * R_RISCV_CALL is changed from R_PC to R_PC_PLT. If the target symbol is preemptable, this will suppress an unnecessary "canonical PLT". This behavior is different from ld.bfd but it is agreed the current lld behavior is favored. I have received positive responses from the binutils maintainer that the ABI/binutils implementation can be improved, see: https://github.com/riscv/riscv-elf-psabi-doc/issues/98 https://sourceware.org/bugzilla/show_bug.cgi?id=24685 Many -no-pie/-pie/-shared programs linked against musl or glibc should work with this patch. Reviewed By: jrtc27 Differential Revision: https://reviews.llvm.org/D63076 llvm-svn: 364812
2019-07-02 01:12:18 +08:00
# RELOC64: .rela.plt {
[ELF][RISCV] Allow PT_LOAD to have overlapping p_offset ranges on EM_RISCV Port the D64906 technique to RISC-V. It deletes 3 alignments at PT_LOAD boundaries for the default case: the size of a RISC-V binary decreases by at most 12kb. llvm-svn: 370192
2019-08-28 20:06:06 +08:00
# RELOC64-NEXT: 0x130E0 R_RISCV_JUMP_SLOT bar 0x0
# RELOC64-NEXT: 0x130E8 R_RISCV_JUMP_SLOT weak 0x0
[ELF][RISCV] Support PLT, GOT, copy and relative relocations * Handle initial relocation types: R_RISCV_CALL_PLT and R_RISCV_GOT_HI20. * Produce dynamic relocation types: R_RISCV_COPY, R_RISCV_RELATIVE, R_RISCV_JUMP_SLOT. * Define SymbolRel as R_RISCV_{32,64} * Generate PLT header: it is used by lazy binding PLT in glibc. * R_RISCV_CALL is changed from R_PC to R_PC_PLT. If the target symbol is preemptable, this will suppress an unnecessary "canonical PLT". This behavior is different from ld.bfd but it is agreed the current lld behavior is favored. I have received positive responses from the binutils maintainer that the ABI/binutils implementation can be improved, see: https://github.com/riscv/riscv-elf-psabi-doc/issues/98 https://sourceware.org/bugzilla/show_bug.cgi?id=24685 Many -no-pie/-pie/-shared programs linked against musl or glibc should work with this patch. Reviewed By: jrtc27 Differential Revision: https://reviews.llvm.org/D63076 llvm-svn: 364812
2019-07-02 01:12:18 +08:00
# RELOC64-NEXT: }
# GOTPLT64: section '.got.plt'
[ELF][RISCV] Allow PT_LOAD to have overlapping p_offset ranges on EM_RISCV Port the D64906 technique to RISC-V. It deletes 3 alignments at PT_LOAD boundaries for the default case: the size of a RISC-V binary decreases by at most 12kb. llvm-svn: 370192
2019-08-28 20:06:06 +08:00
# GOTPLT64-NEXT: 0x000130d0 00000000 00000000 00000000 00000000
# GOTPLT64-NEXT: 0x000130e0 30100100 00000000 30100100 00000000
[ELF][RISCV] Support PLT, GOT, copy and relative relocations * Handle initial relocation types: R_RISCV_CALL_PLT and R_RISCV_GOT_HI20. * Produce dynamic relocation types: R_RISCV_COPY, R_RISCV_RELATIVE, R_RISCV_JUMP_SLOT. * Define SymbolRel as R_RISCV_{32,64} * Generate PLT header: it is used by lazy binding PLT in glibc. * R_RISCV_CALL is changed from R_PC to R_PC_PLT. If the target symbol is preemptable, this will suppress an unnecessary "canonical PLT". This behavior is different from ld.bfd but it is agreed the current lld behavior is favored. I have received positive responses from the binutils maintainer that the ABI/binutils implementation can be improved, see: https://github.com/riscv/riscv-elf-psabi-doc/issues/98 https://sourceware.org/bugzilla/show_bug.cgi?id=24685 Many -no-pie/-pie/-shared programs linked against musl or glibc should work with this patch. Reviewed By: jrtc27 Differential Revision: https://reviews.llvm.org/D63076 llvm-svn: 364812
2019-07-02 01:12:18 +08:00
[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
# DIS: <_start>:
[ELF][RISCV] Support PLT, GOT, copy and relative relocations * Handle initial relocation types: R_RISCV_CALL_PLT and R_RISCV_GOT_HI20. * Produce dynamic relocation types: R_RISCV_COPY, R_RISCV_RELATIVE, R_RISCV_JUMP_SLOT. * Define SymbolRel as R_RISCV_{32,64} * Generate PLT header: it is used by lazy binding PLT in glibc. * R_RISCV_CALL is changed from R_PC to R_PC_PLT. If the target symbol is preemptable, this will suppress an unnecessary "canonical PLT". This behavior is different from ld.bfd but it is agreed the current lld behavior is favored. I have received positive responses from the binutils maintainer that the ABI/binutils implementation can be improved, see: https://github.com/riscv/riscv-elf-psabi-doc/issues/98 https://sourceware.org/bugzilla/show_bug.cgi?id=24685 Many -no-pie/-pie/-shared programs linked against musl or glibc should work with this patch. Reviewed By: jrtc27 Differential Revision: https://reviews.llvm.org/D63076 llvm-svn: 364812
2019-07-02 01:12:18 +08:00
## Direct call
## foo - . = 0x11020-0x11000 = 32
[ELF][RISCV] Allow PT_LOAD to have overlapping p_offset ranges on EM_RISCV Port the D64906 technique to RISC-V. It deletes 3 alignments at PT_LOAD boundaries for the default case: the size of a RISC-V binary decreases by at most 12kb. llvm-svn: 370192
2019-08-28 20:06:06 +08:00
# DIS-NEXT: 11000: auipc ra, 0
# DIS-NEXT: jalr 32(ra)
## bar@plt - . = 0x11050-0x11008 = 72
# DIS-NEXT: 11008: auipc ra, 0
# DIS-NEXT: jalr 72(ra)
## bar@plt - . = 0x11050-0x11010 = 64
# DIS-NEXT: 11010: auipc ra, 0
# DIS-NEXT: jalr 64(ra)
## weak@plt - . = 0x11060-0x11018 = 72
# DIS-NEXT: 11018: auipc ra, 0
# DIS-NEXT: jalr 72(ra)
[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
# DIS: <foo>:
[ELF][RISCV] Support PLT, GOT, copy and relative relocations * Handle initial relocation types: R_RISCV_CALL_PLT and R_RISCV_GOT_HI20. * Produce dynamic relocation types: R_RISCV_COPY, R_RISCV_RELATIVE, R_RISCV_JUMP_SLOT. * Define SymbolRel as R_RISCV_{32,64} * Generate PLT header: it is used by lazy binding PLT in glibc. * R_RISCV_CALL is changed from R_PC to R_PC_PLT. If the target symbol is preemptable, this will suppress an unnecessary "canonical PLT". This behavior is different from ld.bfd but it is agreed the current lld behavior is favored. I have received positive responses from the binutils maintainer that the ABI/binutils implementation can be improved, see: https://github.com/riscv/riscv-elf-psabi-doc/issues/98 https://sourceware.org/bugzilla/show_bug.cgi?id=24685 Many -no-pie/-pie/-shared programs linked against musl or glibc should work with this patch. Reviewed By: jrtc27 Differential Revision: https://reviews.llvm.org/D63076 llvm-svn: 364812
2019-07-02 01:12:18 +08:00
# DIS-NEXT: 11020:
# DIS: Disassembly of section .plt:
[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
# DIS: <.plt>:
[ELF][RISCV] Support PLT, GOT, copy and relative relocations * Handle initial relocation types: R_RISCV_CALL_PLT and R_RISCV_GOT_HI20. * Produce dynamic relocation types: R_RISCV_COPY, R_RISCV_RELATIVE, R_RISCV_JUMP_SLOT. * Define SymbolRel as R_RISCV_{32,64} * Generate PLT header: it is used by lazy binding PLT in glibc. * R_RISCV_CALL is changed from R_PC to R_PC_PLT. If the target symbol is preemptable, this will suppress an unnecessary "canonical PLT". This behavior is different from ld.bfd but it is agreed the current lld behavior is favored. I have received positive responses from the binutils maintainer that the ABI/binutils implementation can be improved, see: https://github.com/riscv/riscv-elf-psabi-doc/issues/98 https://sourceware.org/bugzilla/show_bug.cgi?id=24685 Many -no-pie/-pie/-shared programs linked against musl or glibc should work with this patch. Reviewed By: jrtc27 Differential Revision: https://reviews.llvm.org/D63076 llvm-svn: 364812
2019-07-02 01:12:18 +08:00
# DIS-NEXT: auipc t2, 2
# DIS-NEXT: sub t1, t1, t3
[ELF][RISCV] Allow PT_LOAD to have overlapping p_offset ranges on EM_RISCV Port the D64906 technique to RISC-V. It deletes 3 alignments at PT_LOAD boundaries for the default case: the size of a RISC-V binary decreases by at most 12kb. llvm-svn: 370192
2019-08-28 20:06:06 +08:00
## .got.plt - .plt = 0x13068 - 0x11030 = 4096*2+56
# DIS32-NEXT: lw t3, 56(t2)
# DIS64-NEXT: ld t3, 160(t2)
[ELF][RISCV] Support PLT, GOT, copy and relative relocations * Handle initial relocation types: R_RISCV_CALL_PLT and R_RISCV_GOT_HI20. * Produce dynamic relocation types: R_RISCV_COPY, R_RISCV_RELATIVE, R_RISCV_JUMP_SLOT. * Define SymbolRel as R_RISCV_{32,64} * Generate PLT header: it is used by lazy binding PLT in glibc. * R_RISCV_CALL is changed from R_PC to R_PC_PLT. If the target symbol is preemptable, this will suppress an unnecessary "canonical PLT". This behavior is different from ld.bfd but it is agreed the current lld behavior is favored. I have received positive responses from the binutils maintainer that the ABI/binutils implementation can be improved, see: https://github.com/riscv/riscv-elf-psabi-doc/issues/98 https://sourceware.org/bugzilla/show_bug.cgi?id=24685 Many -no-pie/-pie/-shared programs linked against musl or glibc should work with this patch. Reviewed By: jrtc27 Differential Revision: https://reviews.llvm.org/D63076 llvm-svn: 364812
2019-07-02 01:12:18 +08:00
# DIS-NEXT: addi t1, t1, -44
[ELF][RISCV] Allow PT_LOAD to have overlapping p_offset ranges on EM_RISCV Port the D64906 technique to RISC-V. It deletes 3 alignments at PT_LOAD boundaries for the default case: the size of a RISC-V binary decreases by at most 12kb. llvm-svn: 370192
2019-08-28 20:06:06 +08:00
# DIS32-NEXT: addi t0, t2, 56
# DIS64-NEXT: addi t0, t2, 160
[ELF][RISCV] Support PLT, GOT, copy and relative relocations * Handle initial relocation types: R_RISCV_CALL_PLT and R_RISCV_GOT_HI20. * Produce dynamic relocation types: R_RISCV_COPY, R_RISCV_RELATIVE, R_RISCV_JUMP_SLOT. * Define SymbolRel as R_RISCV_{32,64} * Generate PLT header: it is used by lazy binding PLT in glibc. * R_RISCV_CALL is changed from R_PC to R_PC_PLT. If the target symbol is preemptable, this will suppress an unnecessary "canonical PLT". This behavior is different from ld.bfd but it is agreed the current lld behavior is favored. I have received positive responses from the binutils maintainer that the ABI/binutils implementation can be improved, see: https://github.com/riscv/riscv-elf-psabi-doc/issues/98 https://sourceware.org/bugzilla/show_bug.cgi?id=24685 Many -no-pie/-pie/-shared programs linked against musl or glibc should work with this patch. Reviewed By: jrtc27 Differential Revision: https://reviews.llvm.org/D63076 llvm-svn: 364812
2019-07-02 01:12:18 +08:00
# DIS32-NEXT: srli t1, t1, 2
# DIS64-NEXT: srli t1, t1, 1
# DIS32-NEXT: lw t0, 4(t0)
# DIS64-NEXT: ld t0, 8(t0)
# DIS-NEXT: jr t3
[ELF][RISCV] Allow PT_LOAD to have overlapping p_offset ranges on EM_RISCV Port the D64906 technique to RISC-V. It deletes 3 alignments at PT_LOAD boundaries for the default case: the size of a RISC-V binary decreases by at most 12kb. llvm-svn: 370192
2019-08-28 20:06:06 +08:00
## 32-bit: &.got.plt[bar]-. = 0x13070-0x11050 = 4096*2+32
[ELF][RISCV] Support PLT, GOT, copy and relative relocations * Handle initial relocation types: R_RISCV_CALL_PLT and R_RISCV_GOT_HI20. * Produce dynamic relocation types: R_RISCV_COPY, R_RISCV_RELATIVE, R_RISCV_JUMP_SLOT. * Define SymbolRel as R_RISCV_{32,64} * Generate PLT header: it is used by lazy binding PLT in glibc. * R_RISCV_CALL is changed from R_PC to R_PC_PLT. If the target symbol is preemptable, this will suppress an unnecessary "canonical PLT". This behavior is different from ld.bfd but it is agreed the current lld behavior is favored. I have received positive responses from the binutils maintainer that the ABI/binutils implementation can be improved, see: https://github.com/riscv/riscv-elf-psabi-doc/issues/98 https://sourceware.org/bugzilla/show_bug.cgi?id=24685 Many -no-pie/-pie/-shared programs linked against musl or glibc should work with this patch. Reviewed By: jrtc27 Differential Revision: https://reviews.llvm.org/D63076 llvm-svn: 364812
2019-07-02 01:12:18 +08:00
# DIS: 11050: auipc t3, 2
[ELF][RISCV] Allow PT_LOAD to have overlapping p_offset ranges on EM_RISCV Port the D64906 technique to RISC-V. It deletes 3 alignments at PT_LOAD boundaries for the default case: the size of a RISC-V binary decreases by at most 12kb. llvm-svn: 370192
2019-08-28 20:06:06 +08:00
# DIS32-NEXT: lw t3, 32(t3)
# DIS64-NEXT: ld t3, 144(t3)
[NFC][test] Fix for riscv tests. Following tests need updating for: https://reviews.llvm.org/D55277 llvm-svn: 366183
2019-07-16 13:58:03 +08:00
# DIS-NEXT: jalr t1, t3
[ELF][RISCV] Support PLT, GOT, copy and relative relocations * Handle initial relocation types: R_RISCV_CALL_PLT and R_RISCV_GOT_HI20. * Produce dynamic relocation types: R_RISCV_COPY, R_RISCV_RELATIVE, R_RISCV_JUMP_SLOT. * Define SymbolRel as R_RISCV_{32,64} * Generate PLT header: it is used by lazy binding PLT in glibc. * R_RISCV_CALL is changed from R_PC to R_PC_PLT. If the target symbol is preemptable, this will suppress an unnecessary "canonical PLT". This behavior is different from ld.bfd but it is agreed the current lld behavior is favored. I have received positive responses from the binutils maintainer that the ABI/binutils implementation can be improved, see: https://github.com/riscv/riscv-elf-psabi-doc/issues/98 https://sourceware.org/bugzilla/show_bug.cgi?id=24685 Many -no-pie/-pie/-shared programs linked against musl or glibc should work with this patch. Reviewed By: jrtc27 Differential Revision: https://reviews.llvm.org/D63076 llvm-svn: 364812
2019-07-02 01:12:18 +08:00
# DIS-NEXT: nop
[ELF][RISCV] Allow PT_LOAD to have overlapping p_offset ranges on EM_RISCV Port the D64906 technique to RISC-V. It deletes 3 alignments at PT_LOAD boundaries for the default case: the size of a RISC-V binary decreases by at most 12kb. llvm-svn: 370192
2019-08-28 20:06:06 +08:00
## 32-bit: &.got.plt[weak]-. = 0x13074-0x11060 = 4096*2+20
[ELF][RISCV] Support PLT, GOT, copy and relative relocations * Handle initial relocation types: R_RISCV_CALL_PLT and R_RISCV_GOT_HI20. * Produce dynamic relocation types: R_RISCV_COPY, R_RISCV_RELATIVE, R_RISCV_JUMP_SLOT. * Define SymbolRel as R_RISCV_{32,64} * Generate PLT header: it is used by lazy binding PLT in glibc. * R_RISCV_CALL is changed from R_PC to R_PC_PLT. If the target symbol is preemptable, this will suppress an unnecessary "canonical PLT". This behavior is different from ld.bfd but it is agreed the current lld behavior is favored. I have received positive responses from the binutils maintainer that the ABI/binutils implementation can be improved, see: https://github.com/riscv/riscv-elf-psabi-doc/issues/98 https://sourceware.org/bugzilla/show_bug.cgi?id=24685 Many -no-pie/-pie/-shared programs linked against musl or glibc should work with this patch. Reviewed By: jrtc27 Differential Revision: https://reviews.llvm.org/D63076 llvm-svn: 364812
2019-07-02 01:12:18 +08:00
# DIS: 11060: auipc t3, 2
[ELF][RISCV] Allow PT_LOAD to have overlapping p_offset ranges on EM_RISCV Port the D64906 technique to RISC-V. It deletes 3 alignments at PT_LOAD boundaries for the default case: the size of a RISC-V binary decreases by at most 12kb. llvm-svn: 370192
2019-08-28 20:06:06 +08:00
# DIS32-NEXT: lw t3, 20(t3)
# DIS64-NEXT: ld t3, 136(t3)
[NFC][test] Fix for riscv tests. Following tests need updating for: https://reviews.llvm.org/D55277 llvm-svn: 366183
2019-07-16 13:58:03 +08:00
# DIS-NEXT: jalr t1, t3
[ELF][RISCV] Support PLT, GOT, copy and relative relocations * Handle initial relocation types: R_RISCV_CALL_PLT and R_RISCV_GOT_HI20. * Produce dynamic relocation types: R_RISCV_COPY, R_RISCV_RELATIVE, R_RISCV_JUMP_SLOT. * Define SymbolRel as R_RISCV_{32,64} * Generate PLT header: it is used by lazy binding PLT in glibc. * R_RISCV_CALL is changed from R_PC to R_PC_PLT. If the target symbol is preemptable, this will suppress an unnecessary "canonical PLT". This behavior is different from ld.bfd but it is agreed the current lld behavior is favored. I have received positive responses from the binutils maintainer that the ABI/binutils implementation can be improved, see: https://github.com/riscv/riscv-elf-psabi-doc/issues/98 https://sourceware.org/bugzilla/show_bug.cgi?id=24685 Many -no-pie/-pie/-shared programs linked against musl or glibc should work with this patch. Reviewed By: jrtc27 Differential Revision: https://reviews.llvm.org/D63076 llvm-svn: 364812
2019-07-02 01:12:18 +08:00
# DIS-NEXT: nop
.global _start, foo, bar
.weak weak
_start:
call foo
call bar
call bar@plt
call weak
## foo is local and non-preemptale, no PLT is generated.
foo:
ret