https://github.com/tru updated https://github.com/llvm/llvm-project/pull/100917
>From d728d60cea0181ddd38f8710dcc1e13cd1540c56 Mon Sep 17 00:00:00 2001
From: wanglei <wang...@loongson.cn>
Date: Fri, 26 Jul 2024 14:38:36 +0800
Subject: [PATCH] [lld][ELF][LoongArch] Support
R_LARCH_TLS_{LD,GD,DESC}_PCREL_S2
Reviewed By: MaskRay, SixWeining
Pull Request: https://github.com/llvm/llvm-project/pull/100105
(cherry picked from commit 0057a969a2a397c1ba57e06b65a8bb56af2ce987)
---
lld/ELF/Arch/LoongArch.cpp | 10 ++
lld/ELF/Relocations.cpp | 3 +-
lld/test/ELF/loongarch-tls-gd-pcrel20-s2.s | 129 ++++++++++++++++++
lld/test/ELF/loongarch-tls-ld-pcrel20-s2.s | 82 +++++++++++
lld/test/ELF/loongarch-tlsdesc-pcrel20-s2.s | 142 ++++++++++++++++++++
5 files changed, 365 insertions(+), 1 deletion(-)
create mode 100644 lld/test/ELF/loongarch-tls-gd-pcrel20-s2.s
create mode 100644 lld/test/ELF/loongarch-tls-ld-pcrel20-s2.s
create mode 100644 lld/test/ELF/loongarch-tlsdesc-pcrel20-s2.s
diff --git a/lld/ELF/Arch/LoongArch.cpp b/lld/ELF/Arch/LoongArch.cpp
index 9466e8b1ce54d..db0bc6c760096 100644
--- a/lld/ELF/Arch/LoongArch.cpp
+++ b/lld/ELF/Arch/LoongArch.cpp
@@ -511,6 +511,12 @@ RelExpr LoongArch::getRelExpr(const RelType type, const
Symbol &s,
return R_TLSDESC;
case R_LARCH_TLS_DESC_CALL:
return R_TLSDESC_CALL;
+ case R_LARCH_TLS_LD_PCREL20_S2:
+ return R_TLSLD_PC;
+ case R_LARCH_TLS_GD_PCREL20_S2:
+ return R_TLSGD_PC;
+ case R_LARCH_TLS_DESC_PCREL20_S2:
+ return R_TLSDESC_PC;
// Other known relocs that are explicitly unimplemented:
//
@@ -557,7 +563,11 @@ void LoongArch::relocate(uint8_t *loc, const Relocation
&rel,
write64le(loc, val);
return;
+ // Relocs intended for `pcaddi`.
case R_LARCH_PCREL20_S2:
+ case R_LARCH_TLS_LD_PCREL20_S2:
+ case R_LARCH_TLS_GD_PCREL20_S2:
+ case R_LARCH_TLS_DESC_PCREL20_S2:
checkInt(loc, val, 22, rel);
checkAlignment(loc, val, 4, rel);
write32le(loc, setJ20(read32le(loc), val >> 2));
diff --git a/lld/ELF/Relocations.cpp b/lld/ELF/Relocations.cpp
index 713bd15440251..9a799cd286135 100644
--- a/lld/ELF/Relocations.cpp
+++ b/lld/ELF/Relocations.cpp
@@ -1309,7 +1309,8 @@ static unsigned handleTlsRelocation(RelType type, Symbol
&sym,
// LoongArch does not yet implement transition from TLSDESC to LE/IE, so
// generate TLSDESC dynamic relocation for the dynamic linker to handle.
if (config->emachine == EM_LOONGARCH &&
- oneof<R_LOONGARCH_TLSDESC_PAGE_PC, R_TLSDESC, R_TLSDESC_CALL>(expr)) {
+ oneof<R_LOONGARCH_TLSDESC_PAGE_PC, R_TLSDESC, R_TLSDESC_PC,
+ R_TLSDESC_CALL>(expr)) {
if (expr != R_TLSDESC_CALL) {
sym.setFlags(NEEDS_TLSDESC);
c.addReloc({expr, type, offset, addend, &sym});
diff --git a/lld/test/ELF/loongarch-tls-gd-pcrel20-s2.s
b/lld/test/ELF/loongarch-tls-gd-pcrel20-s2.s
new file mode 100644
index 0000000000000..d4d12b9d4a520
--- /dev/null
+++ b/lld/test/ELF/loongarch-tls-gd-pcrel20-s2.s
@@ -0,0 +1,129 @@
+# REQUIRES: loongarch
+# RUN: rm -rf %t && split-file %s %t
+
+# RUN: llvm-mc --filetype=obj --triple=loongarch32 %t/a.s -o %t/a.32.o
+# RUN: llvm-mc --filetype=obj --triple=loongarch32 %t/bc.s -o %t/bc.32.o
+# RUN: ld.lld -shared -soname=bc.so %t/bc.32.o -o %t/bc.32.so
+# RUN: llvm-mc --filetype=obj --triple=loongarch32 %t/tga.s -o %t/tga.32.o
+# RUN: llvm-mc --filetype=obj --triple=loongarch64 %t/a.s -o %t/a.64.o
+# RUN: llvm-mc --filetype=obj --triple=loongarch64 %t/bc.s -o %t/bc.64.o
+# RUN: ld.lld -shared -soname=bc.so %t/bc.64.o -o %t/bc.64.so
+# RUN: llvm-mc --filetype=obj --triple=loongarch64 %t/tga.s -o %t/tga.64.o
+
+## LA32 GD
+# RUN: ld.lld -shared %t/a.32.o %t/bc.32.o -o %t/gd.32.so
+# RUN: llvm-readobj -r %t/gd.32.so | FileCheck --check-prefix=GD32-REL %s
+# RUN: llvm-objdump -d --no-show-raw-insn %t/gd.32.so | FileCheck
--check-prefix=GD32 %s
+
+## LA32 GD -> LE
+# RUN: ld.lld %t/a.32.o %t/bc.32.o %t/tga.32.o -o %t/le.32
+# RUN: llvm-readelf -r %t/le.32 | FileCheck --check-prefix=NOREL %s
+# RUN: llvm-readelf -x .got %t/le.32 | FileCheck --check-prefix=LE32-GOT %s
+# RUN: ld.lld -pie %t/a.32.o %t/bc.32.o %t/tga.32.o -o %t/le-pie.32
+# RUN: llvm-readelf -r %t/le-pie.32 | FileCheck --check-prefix=NOREL %s
+# RUN: llvm-readelf -x .got %t/le-pie.32 | FileCheck --check-prefix=LE32-GOT %s
+
+## LA32 GD -> IE
+# RUN: ld.lld %t/a.32.o %t/bc.32.so %t/tga.32.o -o %t/ie.32
+# RUN: llvm-readobj -r %t/ie.32 | FileCheck --check-prefix=IE32-REL %s
+# RUN: llvm-readelf -x .got %t/ie.32 | FileCheck --check-prefix=IE32-GOT %s
+
+## LA64 GD
+# RUN: ld.lld -shared %t/a.64.o %t/bc.64.o -o %t/gd.64.so
+# RUN: llvm-readobj -r %t/gd.64.so | FileCheck --check-prefix=GD64-REL %s
+# RUN: llvm-objdump -d --no-show-raw-insn %t/gd.64.so | FileCheck
--check-prefix=GD64 %s
+
+## LA64 GD -> LE
+# RUN: ld.lld %t/a.64.o %t/bc.64.o %t/tga.64.o -o %t/le.64
+# RUN: llvm-readelf -r %t/le.64 | FileCheck --check-prefix=NOREL %s
+# RUN: llvm-readelf -x .got %t/le.64 | FileCheck --check-prefix=LE64-GOT %s
+# RUN: ld.lld -pie %t/a.64.o %t/bc.64.o %t/tga.64.o -o %t/le-pie.64
+# RUN: llvm-readelf -r %t/le-pie.64 | FileCheck --check-prefix=NOREL %s
+# RUN: llvm-readelf -x .got %t/le-pie.64 | FileCheck --check-prefix=LE64-GOT %s
+
+## LA64 GD -> IE
+# RUN: ld.lld %t/a.64.o %t/bc.64.so %t/tga.64.o -o %t/ie.64
+# RUN: llvm-readobj -r %t/ie.64 | FileCheck --check-prefix=IE64-REL %s
+# RUN: llvm-readelf -x .got %t/ie.64 | FileCheck --check-prefix=IE64-GOT %s
+
+# GD32-REL: .rela.dyn {
+# GD32-REL-NEXT: 0x20300 R_LARCH_TLS_DTPMOD32 a 0x0
+# GD32-REL-NEXT: 0x20304 R_LARCH_TLS_DTPREL32 a 0x0
+# GD32-REL-NEXT: 0x20308 R_LARCH_TLS_DTPMOD32 b 0x0
+# GD32-REL-NEXT: 0x2030C R_LARCH_TLS_DTPREL32 b 0x0
+# GD32-REL-NEXT: }
+
+## &DTPMOD(a) - . = 0x20300 - 0x10250 = 16428<<2
+# GD32: 10250: pcaddi $a0, 16428
+# GD32-NEXT: bl 44
+
+## &DTPMOD(b) - . = 0x20308 - 0x10258 = 16428<<2
+# GD32: 10258: pcaddi $a0, 16428
+# GD32-NEXT: bl 36
+
+# GD64-REL: .rela.dyn {
+# GD64-REL-NEXT: 0x204C0 R_LARCH_TLS_DTPMOD64 a 0x0
+# GD64-REL-NEXT: 0x204C8 R_LARCH_TLS_DTPREL64 a 0x0
+# GD64-REL-NEXT: 0x204D0 R_LARCH_TLS_DTPMOD64 b 0x0
+# GD64-REL-NEXT: 0x204D8 R_LARCH_TLS_DTPREL64 b 0x0
+# GD64-REL-NEXT: }
+
+## &DTPMOD(a) - . = 0x204c0 - 0x10398 = 16458<<2
+# GD64: 10398: pcaddi $a0, 16458
+# GD64-NEXT: bl 52
+
+## &DTPMOD(b) - . = 0x204d0 - 0x103a4 = 16460<<2
+# GD64: 103a0: pcaddi $a0, 16460
+# GD64-NEXT: bl 44
+
+# NOREL: no relocations
+
+## .got contains pre-populated values: [a@dtpmod, a@dtprel, b@dtpmod, b@dtprel]
+## a@dtprel = st_value(a) = 0x8
+## b@dtprel = st_value(b) = 0xc
+# LE32-GOT: section '.got':
+# LE32-GOT-NEXT: 0x[[#%x,A:]] 01000000 08000000 01000000 0c000000
+# LE64-GOT: section '.got':
+# LE64-GOT-NEXT: 0x[[#%x,A:]] 01000000 00000000 08000000 00000000
+# LE64-GOT-NEXT: 0x[[#%x,A:]] 01000000 00000000 0c000000 00000000
+
+## a is local - relaxed to LE - its DTPMOD/DTPREL slots are link-time
constants.
+## b is external - DTPMOD/DTPREL dynamic relocations are required.
+# IE32-REL: .rela.dyn {
+# IE32-REL-NEXT: 0x30220 R_LARCH_TLS_DTPMOD32 b 0x0
+# IE32-REL-NEXT: 0x30224 R_LARCH_TLS_DTPREL32 b 0x0
+# IE32-REL-NEXT: }
+# IE32-GOT: section '.got':
+# IE32-GOT-NEXT: 0x00030218 01000000 08000000 00000000 00000000
+
+# IE64-REL: .rela.dyn {
+# IE64-REL-NEXT: 0x30380 R_LARCH_TLS_DTPMOD64 b 0x0
+# IE64-REL-NEXT: 0x30388 R_LARCH_TLS_DTPREL64 b 0x0
+# IE64-REL-NEXT: }
+# IE64-GOT: section '.got':
+# IE64-GOT-NEXT: 0x00030370 01000000 00000000 08000000 00000000
+# IE64-GOT-NEXT: 0x00030380 00000000 00000000 00000000 00000000
+
+#--- a.s
+pcaddi $a0, %gd_pcrel_20(a)
+bl %plt(__tls_get_addr)
+
+pcaddi $a0, %gd_pcrel_20(b)
+bl %plt(__tls_get_addr)
+
+.section .tbss,"awT",@nobits
+.globl a
+.zero 8
+a:
+.zero 4
+
+#--- bc.s
+.section .tbss,"awT",@nobits
+.globl b, c
+b:
+.zero 4
+c:
+
+#--- tga.s
+.globl __tls_get_addr
+__tls_get_addr:
diff --git a/lld/test/ELF/loongarch-tls-ld-pcrel20-s2.s
b/lld/test/ELF/loongarch-tls-ld-pcrel20-s2.s
new file mode 100644
index 0000000000000..70186f5538dfc
--- /dev/null
+++ b/lld/test/ELF/loongarch-tls-ld-pcrel20-s2.s
@@ -0,0 +1,82 @@
+# REQUIRES: loongarch
+# RUN: rm -rf %t && split-file %s %t
+
+# RUN: llvm-mc --filetype=obj --triple=loongarch32 --position-independent
%t/a.s -o %t/a.32.o
+# RUN: llvm-mc --filetype=obj --triple=loongarch32 %t/tga.s -o %t/tga.32.o
+# RUN: llvm-mc --filetype=obj --triple=loongarch64 --position-independent
%t/a.s -o %t/a.64.o
+# RUN: llvm-mc --filetype=obj --triple=loongarch64 %t/tga.s -o %t/tga.64.o
+
+## LA32 LD
+# RUN: ld.lld -shared %t/a.32.o -o %t/ld.32.so
+# RUN: llvm-readobj -r %t/ld.32.so | FileCheck --check-prefix=LD32-REL %s
+# RUN: llvm-readelf -x .got %t/ld.32.so | FileCheck --check-prefix=LD32-GOT %s
+# RUN: llvm-objdump -d --no-show-raw-insn %t/ld.32.so | FileCheck
--check-prefixes=LD32 %s
+
+## LA32 LD -> LE
+# RUN: ld.lld %t/a.32.o %t/tga.32.o -o %t/le.32
+# RUN: llvm-readelf -r %t/le.32 | FileCheck --check-prefix=NOREL %s
+# RUN: llvm-readelf -x .got %t/le.32 | FileCheck --check-prefix=LE32-GOT %s
+# RUN: llvm-objdump -d --no-show-raw-insn %t/le.32 | FileCheck
--check-prefixes=LE32 %s
+
+## LA64 LD
+# RUN: ld.lld -shared %t/a.64.o -o %t/ld.64.so
+# RUN: llvm-readobj -r %t/ld.64.so | FileCheck --check-prefix=LD64-REL %s
+# RUN: llvm-readelf -x .got %t/ld.64.so | FileCheck --check-prefix=LD64-GOT %s
+# RUN: llvm-objdump -d --no-show-raw-insn %t/ld.64.so | FileCheck
--check-prefixes=LD64 %s
+
+## LA64 LD -> LE
+# RUN: ld.lld %t/a.64.o %t/tga.64.o -o %t/le.64
+# RUN: llvm-readelf -r %t/le.64 | FileCheck --check-prefix=NOREL %s
+# RUN: llvm-readelf -x .got %t/le.64 | FileCheck --check-prefix=LE64-GOT %s
+# RUN: llvm-objdump -d --no-show-raw-insn %t/le.64 | FileCheck
--check-prefixes=LE64 %s
+
+## a@dtprel = st_value(a) = 0 is a link-time constant.
+# LD32-REL: .rela.dyn {
+# LD32-REL-NEXT: 0x20280 R_LARCH_TLS_DTPMOD32 - 0x0
+# LD32-REL-NEXT: }
+# LD32-GOT: section '.got':
+# LD32-GOT-NEXT: 0x00020280 00000000 00000000
+
+# LD64-REL: .rela.dyn {
+# LD64-REL-NEXT: 0x20400 R_LARCH_TLS_DTPMOD64 - 0x0
+# LD64-REL-NEXT: }
+# LD64-GOT: section '.got':
+# LD64-GOT-NEXT: 0x00020400 00000000 00000000 00000000 00000000
+
+## LA32: &DTPMOD(a) - . = 0x20280 - 0x101cc = 16429<<2
+# LD32: 101cc: pcaddi $a0, 16429
+# LD32-NEXT: bl 48
+
+## LA64: &DTPMOD(a) - . = 0x20400 - 0x102e0 = 16456<<2
+# LD64: 102e0: pcaddi $a0, 16456
+# LD64-NEXT: bl 44
+
+# NOREL: no relocations
+
+## a is local - its DTPMOD/DTPREL slots are link-time constants.
+## a@dtpmod = 1 (main module)
+# LE32-GOT: section '.got':
+# LE32-GOT-NEXT: 0x0003011c 01000000 00000000
+
+# LE64-GOT: section '.got':
+# LE64-GOT-NEXT: 0x000301d0 01000000 00000000 00000000 00000000
+
+## LA32: DTPMOD(.LANCHOR0) - . = 0x3011c - 0x20114 = 16386<<2
+# LE32: 20114: pcaddi $a0, 16386
+# LE32-NEXT: bl 4
+
+## LA64: DTPMOD(.LANCHOR0) - . = 0x301d0 - 0x201c8 = 16386<<2
+# LE64: 201c8: pcaddi $a0, 16386
+# LE64-NEXT: bl 4
+
+#--- a.s
+pcaddi $a0, %ld_pcrel_20(.LANCHOR0)
+bl %plt(__tls_get_addr)
+
+.section .tbss,"awT",@nobits
+.set .LANCHOR0, . + 0
+.zero 8
+
+#--- tga.s
+.globl __tls_get_addr
+__tls_get_addr:
diff --git a/lld/test/ELF/loongarch-tlsdesc-pcrel20-s2.s
b/lld/test/ELF/loongarch-tlsdesc-pcrel20-s2.s
new file mode 100644
index 0000000000000..99e21d9935197
--- /dev/null
+++ b/lld/test/ELF/loongarch-tlsdesc-pcrel20-s2.s
@@ -0,0 +1,142 @@
+# REQUIRES: loongarch
+# RUN: rm -rf %t && split-file %s %t && cd %t
+# RUN: llvm-mc -filetype=obj -triple=loongarch64 a.s -o a.64.o
+# RUN: llvm-mc -filetype=obj -triple=loongarch64 c.s -o c.64.o
+# RUN: ld.lld -shared -soname=c.64.so c.64.o -o c.64.so
+# RUN: llvm-mc -filetype=obj -triple=loongarch32 --defsym ELF32=1 a.s -o a.32.o
+# RUN: llvm-mc -filetype=obj -triple=loongarch32 --defsym ELF32=1 c.s -o c.32.o
+# RUN: ld.lld -shared -soname=c.32.so c.32.o -o c.32.so
+
+# RUN: ld.lld -shared -z now a.64.o c.64.o -o a.64.so
+# RUN: llvm-readobj -r -x .got a.64.so | FileCheck --check-prefix=GD64-RELA %s
+# RUN: llvm-objdump --no-show-raw-insn -h -d a.64.so | FileCheck %s
--check-prefix=GD64
+
+# RUN: ld.lld -shared -z now a.64.o c.64.o -o rel.64.so -z rel
+# RUN: llvm-readobj -r -x .got rel.64.so | FileCheck --check-prefix=GD64-REL %s
+
+## FIXME: The transition frome TLSDESC to IE/LE has not yet been implemented.
+## Keep the dynamic relocations and hand them over to dynamic linker.
+
+# RUN: ld.lld -e 0 -z now a.64.o c.64.o -o a.64.le
+# RUN: llvm-readobj -r -x .got a.64.le | FileCheck --check-prefix=LE64-RELA %s
+
+# RUN: ld.lld -e 0 -z now a.64.o c.64.so -o a.64.ie
+# RUN: llvm-readobj -r -x .got a.64.ie | FileCheck --check-prefix=IE64-RELA %s
+
+## 32-bit code is mostly the same. We only test a few variants.
+
+# RUN: ld.lld -shared -z now a.32.o c.32.o -o rel.32.so -z rel
+# RUN: llvm-readobj -r -x .got rel.32.so | FileCheck --check-prefix=GD32-REL %s
+
+# GD64-RELA: .rela.dyn {
+# GD64-RELA-NEXT: 0x203F0 R_LARCH_TLS_DESC64 - 0x7FF
+# GD64-RELA-NEXT: 0x203D0 R_LARCH_TLS_DESC64 a 0x0
+# GD64-RELA-NEXT: 0x203E0 R_LARCH_TLS_DESC64 c 0x0
+# GD64-RELA-NEXT: }
+# GD64-RELA: Hex dump of section '.got':
+# GD64-RELA-NEXT: 0x000203d0 00000000 00000000 00000000 00000000 .
+# GD64-RELA-NEXT: 0x000203e0 00000000 00000000 00000000 00000000 .
+# GD64-RELA-NEXT: 0x000203f0 00000000 00000000 00000000 00000000 .
+
+# GD64-REL: .rel.dyn {
+# GD64-REL-NEXT: 0x203D8 R_LARCH_TLS_DESC64 -
+# GD64-REL-NEXT: 0x203B8 R_LARCH_TLS_DESC64 a
+# GD64-REL-NEXT: 0x203C8 R_LARCH_TLS_DESC64 c
+# GD64-REL-NEXT: }
+# GD64-REL: Hex dump of section '.got':
+# GD64-REL-NEXT: 0x000203b8 00000000 00000000 00000000 00000000 .
+# GD64-REL-NEXT: 0x000203c8 00000000 00000000 00000000 00000000 .
+# GD64-REL-NEXT: 0x000203d8 00000000 00000000 ff070000 00000000 .
+
+# GD64: .got 00000030 00000000000203d0
+
+## &.got[a]-. = 0x203d0 - 0x102e0 = 16444<<2
+# GD64: 102e0: pcaddi $a0, 16444
+# GD64-NEXT: ld.d $ra, $a0, 0
+# GD64-NEXT: jirl $ra, $ra, 0
+# GD64-NEXT: add.d $a1, $a0, $tp
+
+## &.got[b]-. = 0x203d0+32 - 0x102f0 = 16448<<2
+# GD64: 102f0: pcaddi $a0, 16448
+# GD64-NEXT: ld.d $ra, $a0, 0
+# GD64-NEXT: jirl $ra, $ra, 0
+# GD64-NEXT: add.d $a2, $a0, $tp
+
+## &.got[c]-. = 0x203d0+16 - 0x10300 = 16440<<2
+# GD64: 10300: pcaddi $a0, 16440
+# GD64-NEXT: ld.d $ra, $a0, 0
+# GD64-NEXT: jirl $ra, $ra, 0
+# GD64-NEXT: add.d $a3, $a0, $tp
+
+# LE64-RELA: .rela.dyn {
+# LE64-RELA-NEXT: 0x30240 R_LARCH_TLS_DESC64 - 0x8
+# LE64-RELA-NEXT: 0x30250 R_LARCH_TLS_DESC64 - 0x800
+# LE64-RELA-NEXT: 0x30260 R_LARCH_TLS_DESC64 - 0x7FF
+# LE64-RELA-NEXT: }
+# LE64-RELA: Hex dump of section '.got':
+# LE64-RELA-NEXT: 0x00030240 00000000 00000000 00000000 00000000 .
+# LE64-RELA-NEXT: 0x00030250 00000000 00000000 00000000 00000000 .
+# LE64-RELA-NEXT: 0x00030260 00000000 00000000 00000000 00000000 .
+
+# IE64-RELA: .rela.dyn {
+# IE64-RELA-NEXT: 0x303C8 R_LARCH_TLS_DESC64 - 0x8
+# IE64-RELA-NEXT: 0x303E8 R_LARCH_TLS_DESC64 - 0x7FF
+# IE64-RELA-NEXT: 0x303D8 R_LARCH_TLS_DESC64 c 0x0
+# IE64-RELA-NEXT: }
+# IE64-RELA: Hex dump of section '.got':
+# IE64-RELA-NEXT: 0x000303c8 00000000 00000000 00000000 00000000 .
+# IE64-RELA-NEXT: 0x000303d8 00000000 00000000 00000000 00000000 .
+# IE64-RELA-NEXT: 0x000303e8 00000000 00000000 00000000 00000000 .
+
+# GD32-REL: .rel.dyn {
+# GD32-REL-NEXT: 0x20264 R_LARCH_TLS_DESC32 -
+# GD32-REL-NEXT: 0x20254 R_LARCH_TLS_DESC32 a
+# GD32-REL-NEXT: 0x2025C R_LARCH_TLS_DESC32 c
+# GD32-REL-NEXT: }
+# GD32-REL: Hex dump of section '.got':
+# GD32-REL-NEXT: 0x00020254 00000000 00000000 00000000 00000000 .
+# GD32-REL-NEXT: 0x00020264 00000000 ff070000 .
+
+#--- a.s
+.macro add dst, src1, src2
+.ifdef ELF32
+add.w \dst, \src1, \src2
+.else
+add.d \dst, \src1, \src2
+.endif
+.endm
+.macro load dst, src1, src2
+.ifdef ELF32
+ld.w \dst, \src1, \src2
+.else
+ld.d \dst, \src1, \src2
+.endif
+.endm
+
+pcaddi $a0, %desc_pcrel_20(a)
+load $ra, $a0, %desc_ld(a)
+jirl $ra, $ra, %desc_call(a)
+add $a1, $a0, $tp
+
+pcaddi $a0, %desc_pcrel_20(b)
+load $ra, $a0, %desc_ld(b)
+jirl $ra, $ra, %desc_call(b)
+add $a2, $a0, $tp
+
+pcaddi $a0, %desc_pcrel_20(c)
+load $ra, $a0, %desc_ld(c)
+jirl $ra, $ra, %desc_call(c)
+add $a3, $a0, $tp
+
+.section .tbss,"awT",@nobits
+.globl a
+.zero 8
+a:
+.zero 2039 ## Place b at 0x7ff
+b:
+.zero 1
+
+#--- c.s
+.section .tbss,"awT",@nobits
+.globl c
+c: .zero 4
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