hexagon-plt.s
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# REQUIRES: hexagon
# RUN: echo '.globl bar, weak; .type bar,@function; .type weak,@function; bar: weak:' > %t1.s
# RUN: llvm-mc -filetype=obj -triple=hexagon-unknown-elf %t1.s -o %t1.o
# RUN: ld.lld -shared %t1.o -soname=t1.so -o %t1.so
# RUN: llvm-mc -mno-fixup -filetype=obj -triple=hexagon-unknown-elf %s -o %t.o
# RUN: ld.lld %t.o %t1.so -z separate-code -o %t
# RUN: llvm-readelf -S -s %t | FileCheck --check-prefixes=SEC,NM %s
# RUN: llvm-readobj -r %t | FileCheck --check-prefix=RELOC %s
# RUN: llvm-readelf -x .got.plt %t | FileCheck --check-prefix=GOTPLT %s
# RUN: llvm-objdump -d --no-show-raw-insn %t | FileCheck --check-prefixes=DIS %s
# SEC: .plt PROGBITS {{0*}}00020040
## 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.
# RELOC: .rela.plt {
# RELOC-NEXT: 0x40078 R_HEX_JMP_SLOT bar 0x0
# RELOC-NEXT: 0x4007C R_HEX_JMP_SLOT weak 0x0
# RELOC-NEXT: }
# GOTPLT: section '.got.plt'
# GOTPLT-NEXT: 0x00040068 00000000 00000000 00000000 00000000
# GOTPLT-NEXT: 0x00040078 00000000 00000000
# DIS: <_start>:
## Direct call
## Call foo directly
# DIS-NEXT: { call 0x2003c }
## Call bar via plt
# DIS-NEXT: { call 0x20060 }
## Call weak via plt
# DIS-NEXT: { call 0x20070 }
# DIS-NEXT: { immext(#0)
## Call foo directly
# DIS-NEXT: if (p0) jump:nt 0x2003c }
# DIS-NEXT: { immext(#64)
## Call bar via plt
# DIS-NEXT: if (p0) jump:nt 0x20060 }
# DIS-NEXT: { immext(#64)
## Call weak via plt
# DIS-NEXT: if (p0) jump:nt 0x20070 }
# DIS-NEXT: { immext(#0)
## Call foo directly
# DIS-NEXT: r0 = #0 ; jump 0x2003c }
# DIS-NEXT: { immext(#0)
## Call bar via plt
# DIS-NEXT: r0 = #0 ; jump 0x20060 }
# DIS-NEXT: { immext(#0)
## Call weak via plt
# DIS-NEXT: r0 = #0 ; jump 0x20070 }
# DIS: <foo>:
# DIS-NEXT: 2003c:
# DIS: Disassembly of section .plt:
# DIS: 00020040 <.plt>:
# DIS-NEXT: 20040: { immext(#131072)
# DIS-NEXT: 20044: r28 = add(pc,##131112) }
# DIS-NEXT: 20048: { r14 -= add(r28,#16)
# DIS-NEXT: 2004c: r15 = memw(r28+#8)
# DIS-NEXT: 20050: r28 = memw(r28+#4) }
# DIS-NEXT: 20054: { r14 = asr(r14,#2)
# DIS-NEXT: 20058: jumpr r28 }
# DIS-NEXT: 2005c: { trap0(#219) }
## bar's plt slot
# DIS-NEXT: 20060: { immext(#131072)
# DIS-NEXT: 20064: r14 = add(pc,##131096) }
# DIS-NEXT: 20068: { r28 = memw(r14+#0) }
# DIS-NEXT: 2006c: { jumpr r28 }
## weak's plt slot
# DIS-NEXT: 20070: { immext(#131072)
# DIS-NEXT: 20074: r14 = add(pc,##131084) }
# DIS-NEXT: 20078: { r28 = memw(r14+#0) }
# DIS-NEXT: 2007c: { jumpr r28 }
.global _start, foo, bar
.weak weak
_start:
call foo
call bar
call weak
if (p0) jump foo
if (p0) jump bar
if (p0) jump weak
{ r0 = #0; jump foo }
{ r0 = #0; jump bar }
{ r0 = #0; jump weak }
## foo is local and non-preemptale, no PLT is generated.
foo:
jumpr r31