derek.holloway
7502bf64a4
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61 lines
1.8 KiB
ArmAsm
61 lines
1.8 KiB
ArmAsm
// REQUIRES: x86
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// Check that we can wrap a dllimported symbol, so that references to
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// __imp_<symbol> gets redirected to a symbol that already exists or a defined
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// local import instead.
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// RUN: split-file %s %t.dir
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// RUN: llvm-mc -filetype=obj -triple=i686-win32-gnu %t.dir/main.s -o %t.main.obj
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// RUN: llvm-mc -filetype=obj -triple=i686-win32-gnu %t.dir/other.s -o %t.other.obj
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// RUN: lld-link -dll -out:%t.dll %t.other.obj -noentry -safeseh:no -export:foo -export:bar -implib:%t.lib
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// RUN: lld-link -out:%t.exe %t.main.obj %t.lib -entry:entry -subsystem:console -debug:symtab -safeseh:no -wrap:foo -wrap:bar -lldmap:%t.map
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// RUN: llvm-objdump -s -d --print-imm-hex %t.exe | FileCheck %s
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// CHECK: Contents of section .rdata:
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// CHECK-NEXT: 402000 0c104000
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// CHECK: Disassembly of section .text:
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// CHECK-EMPTY:
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// CHECK: 00401000 <_entry>:
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// CHECK-NEXT: 401000: ff 25 00 20 40 00 jmpl *0x402000
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// CHECK-NEXT: 401006: ff 25 00 00 00 00 jmpl *0x0
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// CHECK-EMPTY:
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// CHECK-NEXT: 0040100c <___wrap_foo>:
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// CHECK-NEXT: 40100c: c3 retl
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// CHECK-EMPTY:
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// CHECK-NEXT: 0040100d <___wrap_bar>:
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// CHECK-NEXT: 40100d: c3 retl
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// The first jmpl instruction in _entry points at an address in 0x402000,
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// which is the first 4 bytes of the .rdata section (above), which is a
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// pointer that points at ___wrap_foo.
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// The second jmpl instruction in _entry points to null because the referenced
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// symbol `__imp____wrap_bar` is declared as a weak reference to prevent pull a
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// reference from an external DLL.
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#--- main.s
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.global _entry
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_entry:
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jmpl *__imp__foo
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jmpl *__imp__bar
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.global ___wrap_foo
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___wrap_foo:
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ret
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.weak __imp____wrap_bar
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.global ___wrap_bar
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___wrap_bar:
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ret
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#--- other.s
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.global _foo
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_foo:
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ret
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.global _bar
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_bar:
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ret
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