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/**
* Test ELF for .note.gnu.property, built on x86-64.
*
* Object file:
* gcc -c note_gnu_property.S -o note_gnu_property.o.elf
*
* ELF executable (to also have a PT_GNU_PROPERTY program header):
* gcc -DEXE -c note_gnu_property.S -o /tmp/x.o
* ld /tmp/x.o -o note_gnu_property.elf
*/
// https://github.com/hjl-tools/linux-abi/wiki/linux-abi-draft.pdf
#define NT_GNU_PROPERTY_TYPE_0 5
#define GNU_PROPERTY_STACK_SIZE 1
#define GNU_PROPERTY_NO_COPY_ON_PROTECTED 2
#define GNU_PROPERTY_LOPROC 0xc0000000
#define GNU_PROPERTY_HIPROC 0xdfffffff
#define GNU_PROPERTY_LOUSER 0xe0000000
#define GNU_PROPERTY_HIUSER 0xffffffff
// Unknown property types for testing purposes
#define GNU_PROPERTY_TEST_UNKNOWN 0x12345678
#define GNU_PROPERTY_TEST_UNKNOWN_PROC (GNU_PROPERTY_LOPROC + 0x1234567)
#define GNU_PROPERTY_TEST_UNKNOWN_USER (GNU_PROPERTY_LOUSER + 0x1234567)
// https://gitlab.com/x86-psABIs/x86-64-ABI/
// https://gitlab.com/x86-psABIs/x86-64-ABI/-/wikis/x86-64-psABI
#define GNU_PROPERTY_X86_UINT32_AND_LO 0xc0000002
#define GNU_PROPERTY_X86_UINT32_AND_HI 0xc0007fff
#define GNU_PROPERTY_X86_UINT32_OR_LO 0xc0008000
#define GNU_PROPERTY_X86_UINT32_OR_HI 0xc000ffff
#define GNU_PROPERTY_X86_UINT32_OR_AND_LO 0xc0010000
#define GNU_PROPERTY_X86_UINT32_OR_AND_HI 0xc0017fff
#define GNU_PROPERTY_X86_FEATURE_1_AND (GNU_PROPERTY_X86_UINT32_AND_LO + 0)
#define GNU_PROPERTY_X86_FEATURE_1_IBT (1U << 0)
#define GNU_PROPERTY_X86_FEATURE_1_SHSTK (1U << 1)
#define GNU_PROPERTY_X86_FEATURE_1_LAM_U48 (1U << 2)
#define GNU_PROPERTY_X86_FEATURE_1_LAM_U57 (1U << 3)
#ifdef __x86_64__
#define ALIGN .p2align 3
#else
#define ALIGN .p2align 2
#endif
.section ".text"
.global _start
_start:
ud2
.section ".note.gnu.property", "a"
ALIGN
.long 1f - 0f // n_namesz
.long end - 2f // n_descsz
.long NT_GNU_PROPERTY_TYPE_0 // n_type
0: .asciz "GNU" // n_name
1:
ALIGN
2: .long GNU_PROPERTY_STACK_SIZE // pr_type
.long 4f - 3f // pr_datasz
3:
.dc.a 0x123000
4:
ALIGN
.long GNU_PROPERTY_NO_COPY_ON_PROTECTED // pr_type
.long 0 // pr_datasz
ALIGN
// Avoid these if linking to executable, linkers may not recognize them
#ifndef EXE
.long GNU_PROPERTY_TEST_UNKNOWN // pr_type
.long 6f-5f // pr_datasz
5:
.ascii "hello world"
6:
ALIGN
.long GNU_PROPERTY_TEST_UNKNOWN_PROC // pr_type
.long 8f-7f // pr_datasz
7:
.ascii "foobar"
8:
ALIGN
.long GNU_PROPERTY_TEST_UNKNOWN_USER // pr_type
.long 10f-9f // pr_datasz
9:
.ascii "bazquuz"
10:
ALIGN
#endif
11: .long GNU_PROPERTY_X86_FEATURE_1_AND // pr_type.
.long 13f - 12f // pr_datasz
12:
// Not sure if LAM_U48 and LAM_U57 make sense together, readelf does not
// seem to complain and outputs both.
.long GNU_PROPERTY_X86_FEATURE_1_IBT \
| GNU_PROPERTY_X86_FEATURE_1_SHSTK \
| GNU_PROPERTY_X86_FEATURE_1_LAM_U48 \
| GNU_PROPERTY_X86_FEATURE_1_LAM_U57
13:
ALIGN
end:
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