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| 3 | * Copyright (C) 2024 Google LLC
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| 4 | *
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| 5 | * Example for symbol pointers. When compiled with Clang, gendwarfkyms
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| 6 | * uses a symbol pointer for `f`.
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| 7 | *
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| 8 | * $ clang -g -c examples/symbolptr.c -o examples/symbolptr.o
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| 9 | * $ echo -e "f\ng\np" | ./gendwarfksyms -d examples/symbolptr.o
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| 10 |
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| 11 |
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| 12 |
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| 13 | #ifndef __used
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| 14 | #define __used __attribute__((__used__))
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| 15 | #endif
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| 16 | #ifndef __section
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| 17 | #define __section(section) __attribute__((__section__(section)))
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| 18 | #endif
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| 19 |
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| 20 | #define __GENDWARFKSYMS_EXPORT(sym) \
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| 21 | static typeof(sym) *__gendwarfksyms_ptr_##sym __used \
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| 22 | __section(".discard.gendwarfksyms") = &sym;
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| 23 |
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| 24 | extern void f(unsigned int arg);
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| 25 | void g(int *arg);
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| 26 | void g(int *arg) {}
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| 27 |
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| 28 | struct s;
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| 29 | extern struct s *p;
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| 30 |
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| 31 | __GENDWARFKSYMS_EXPORT(f);
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| 32 | __GENDWARFKSYMS_EXPORT(g);
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| 33 | __GENDWARFKSYMS_EXPORT(p);
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