derek.holloway
7502bf64a4
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105 lines
3.2 KiB
ArmAsm
105 lines
3.2 KiB
ArmAsm
# REQUIRES: hexagon
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# RUN: echo '.globl bar, weak; .type bar,@function; .type weak,@function; bar: weak:' > %t1.s
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# RUN: llvm-mc -filetype=obj -triple=hexagon-unknown-elf %t1.s -o %t1.o
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# RUN: ld.lld -shared %t1.o -soname=t1.so -o %t1.so
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# RUN: llvm-mc -mno-fixup -filetype=obj -triple=hexagon-unknown-elf %s -o %t.o
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# RUN: ld.lld %t.o %t1.so -z separate-code -o %t
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# RUN: llvm-readelf -S -s %t | FileCheck --check-prefixes=SEC,NM %s
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# RUN: llvm-readobj -r %t | FileCheck --check-prefix=RELOC %s
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# RUN: llvm-readelf -x .got.plt %t | FileCheck --check-prefix=GOTPLT %s
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# RUN: llvm-objdump --no-print-imm-hex -d --no-show-raw-insn %t | FileCheck --check-prefixes=DIS %s
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# SEC: .plt PROGBITS {{0*}}00020040
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## A canonical PLT has a non-zero st_value. bar and weak are called but their
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## addresses are not taken, so a canonical PLT is not necessary.
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# NM: {{0*}}00000000 0 FUNC GLOBAL DEFAULT UND bar
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# NM: {{0*}}00000000 0 FUNC WEAK DEFAULT UND weak
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## The .got.plt slots relocated by .rela.plt point to .plt
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## This is required by glibc.
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# RELOC: .rela.plt {
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# RELOC-NEXT: 0x40078 R_HEX_JMP_SLOT bar 0x0
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# RELOC-NEXT: 0x4007C R_HEX_JMP_SLOT weak 0x0
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# RELOC-NEXT: }
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# GOTPLT: section '.got.plt'
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# GOTPLT-NEXT: 0x00040068 00000000 00000000 00000000 00000000
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# GOTPLT-NEXT: 0x00040078 00000000 00000000
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# DIS: <_start>:
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## Direct call
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## Call foo directly
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# DIS-NEXT: { call 0x2003c <foo> }
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## Call bar via plt
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# DIS-NEXT: { call 0x20060 <bar@plt> }
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## Call weak via plt
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# DIS-NEXT: { call 0x20070 <weak@plt> }
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# DIS-NEXT: { immext(#0)
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## Call foo directly
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# DIS-NEXT: if (p0) jump:nt 0x2003c <foo> }
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# DIS-NEXT: { immext(#64)
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## Call bar via plt
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# DIS-NEXT: if (p0) jump:nt 0x20060 <bar@plt> }
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# DIS-NEXT: { immext(#64)
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## Call weak via plt
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# DIS-NEXT: if (p0) jump:nt 0x20070 <weak@plt> }
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# DIS-NEXT: { immext(#0)
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## Call foo directly
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# DIS-NEXT: r0 = #0 ; jump 0x2003c <foo> }
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# DIS-NEXT: { immext(#0)
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## Call bar via plt
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# DIS-NEXT: r0 = #0 ; jump 0x20060 <bar@plt> }
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# DIS-NEXT: { immext(#0)
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## Call weak via plt
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# DIS-NEXT: r0 = #0 ; jump 0x20070 <weak@plt> }
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# DIS: <foo>:
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# DIS-NEXT: 2003c:
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# DIS: Disassembly of section .plt:
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# DIS: 00020040 <.plt>:
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# DIS-NEXT: 20040: { immext(#131072)
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# DIS-NEXT: 20044: r28 = add(pc,##131112) }
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# DIS-NEXT: 20048: { r14 -= add(r28,#16)
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# DIS-NEXT: 2004c: r15 = memw(r28+#8)
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# DIS-NEXT: 20050: r28 = memw(r28+#4) }
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# DIS-NEXT: 20054: { r14 = asr(r14,#2)
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# DIS-NEXT: 20058: jumpr r28 }
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# DIS-NEXT: 2005c: { trap0(#219) }
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# DIS-EMPTY:
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# DIS-NEXT: 00020060 <bar@plt>:
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# DIS-NEXT: 20060: { immext(#131072)
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# DIS-NEXT: 20064: r14 = add(pc,##131096) }
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# DIS-NEXT: 20068: { r28 = memw(r14+#0) }
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# DIS-NEXT: 2006c: { jumpr r28 }
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# DIS-EMPTY:
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# DIS-NEXT: 00020070 <weak@plt>:
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# DIS-NEXT: 20070: { immext(#131072)
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# DIS-NEXT: 20074: r14 = add(pc,##131084) }
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# DIS-NEXT: 20078: { r28 = memw(r14+#0) }
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# DIS-NEXT: 2007c: { jumpr r28 }
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.global _start, foo, bar
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.weak weak
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_start:
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call foo
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call bar
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call weak
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if (p0) jump foo
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if (p0) jump bar
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if (p0) jump weak
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{ r0 = #0; jump foo }
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{ r0 = #0; jump bar }
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{ r0 = #0; jump weak }
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## foo is local and non-preemptale, no PLT is generated.
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foo:
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jumpr r31
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