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https://sourceware.org/git/binutils-gdb.git
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e2cbcd9156
We can generate x86-64 TLS code sequences for general and local dynamic models without PLT, which uses indirect call via GOT: call *__tls_get_addr@GOTPCREL(%rip) instead of direct call: call __tls_get_addr[@PLT] Since direct call is 4-byte long and indirect call, is 5-byte long, the extra one byte must be handled properly. For general dynamic model, one 0x66 prefix before call instruction is removed to make room for indirect call. For local dynamic model, we simply use 5-byte indirect call. TLS linker optimization is updated to recognize new instruction patterns. For local dynamic model to local exec model transition, we generate 4 0x66 prefixes, instead of 3, before mov instruction in 64-bit and generate a 5-byte nop, instead of 4-byte, before mov instruction in 32-bit. Since linker may convert call *__tls_get_addr@GOTPCREL(%rip) to addr32 call __tls_get_addr when producing static executable, both patterns are recognized. bfd/ * elf64-x86-64.c (elf_x86_64_link_hash_entry): Add tls_get_addr. (elf_x86_64_link_hash_newfunc): Initialize tls_get_addr to 2. (elf_x86_64_check_tls_transition): Check indirect call and direct call with the addr32 prefix for general and local dynamic models. Set the tls_get_addr feild. (elf_x86_64_convert_load_reloc): Always use addr32 prefix for indirect __tls_get_addr call via GOT. (elf_x86_64_relocate_section): Handle GD->LE, GD->IE and LD->LE transitions with indirect call and direct call with the addr32 prefix. ld/ * testsuite/ld-x86-64/pass.out: New file. * testsuite/ld-x86-64/tls-def1.c: Likewise. * testsuite/ld-x86-64/tls-gd1.S: Likewise. * testsuite/ld-x86-64/tls-ld1.S: Likewise. * testsuite/ld-x86-64/tls-main1.c: Likewise. * testsuite/ld-x86-64/tls.exp: Likewise. * testsuite/ld-x86-64/tlsbin2-nacl.rd: Likewise. * testsuite/ld-x86-64/tlsbin2.dd: Likewise. * testsuite/ld-x86-64/tlsbin2.rd: Likewise. * testsuite/ld-x86-64/tlsbin2.sd: Likewise. * testsuite/ld-x86-64/tlsbin2.td: Likewise. * testsuite/ld-x86-64/tlsbinpic2.s: Likewise. * testsuite/ld-x86-64/tlsgd10.dd: Likewise. * testsuite/ld-x86-64/tlsgd10.s: Likewise. * testsuite/ld-x86-64/tlsgd11.dd: Likewise. * testsuite/ld-x86-64/tlsgd11.s: Likewise. * testsuite/ld-x86-64/tlsgd12.d: Likewise. * testsuite/ld-x86-64/tlsgd12.s: Likewise. * testsuite/ld-x86-64/tlsgd13.d: Likewise. * testsuite/ld-x86-64/tlsgd13.s: Likewise. * testsuite/ld-x86-64/tlsgd14.dd: Likewise. * testsuite/ld-x86-64/tlsgd14.s: Likewise. * testsuite/ld-x86-64/tlsgd5c.s: Likewise. * testsuite/ld-x86-64/tlsgd6c.s: Likewise. * testsuite/ld-x86-64/tlsgd9.dd: Likewise. * testsuite/ld-x86-64/tlsgd9.s: Likewise. * testsuite/ld-x86-64/tlsld4.dd: Likewise. * testsuite/ld-x86-64/tlsld4.s: Likewise. * testsuite/ld-x86-64/tlsld5.dd: Likewise. * testsuite/ld-x86-64/tlsld5.s: Likewise. * testsuite/ld-x86-64/tlsld6.dd: Likewise. * testsuite/ld-x86-64/tlsld6.s: Likewise. * testsuite/ld-x86-64/tlspic2-nacl.rd: Likewise. * testsuite/ld-x86-64/tlspic2.dd: Likewise. * testsuite/ld-x86-64/tlspic2.rd: Likewise. * testsuite/ld-x86-64/tlspic2.sd: Likewise. * testsuite/ld-x86-64/tlspic2.td: Likewise. * testsuite/ld-x86-64/tlspic3.s: Likewise. * testsuite/ld-x86-64/tlspie2.s: Likewise. * testsuite/ld-x86-64/tlspie2a.d: Likewise. * testsuite/ld-x86-64/tlspie2b.d: Likewise. * testsuite/ld-x86-64/tlspie2c.d: Likewise. * testsuite/ld-x86-64/tlsgd5.dd: Updated. * testsuite/ld-x86-64/tlsgd6.dd: Likewise. * testsuite/ld-x86-64/x86-64.exp: Run libtlspic2.so, tlsbin2, tlsgd5b, tlsgd6b, tlsld4, tlsld5, tlsld6, tlsgd9, tlsgd10, tlsgd11, tlsgd14, tlsgd12, tlsgd13, tlspie2a, tlspie2b and tlspie2c.
311 lines
9.9 KiB
Plaintext
311 lines
9.9 KiB
Plaintext
#source: tlsbinpic2.s
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#source: tlsbin.s
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#as: --64
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#ld: -shared -melf_x86_64 --no-ld-generated-unwind-info
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#objdump: -drj.text
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#target: x86_64-*-*
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# PT_TLS layout is:
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# Offset from Offset from Name
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# TCB base TCB end
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# 0x00 -0xa0 sg1..sg8
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# 0x20 -0x80 sl1..sl8
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# 0x40 -0x60 sh1..sh8
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# 0x60 -0x40 bg1..bg8
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# 0x80 -0x20 bl1..bl8
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.*: +file format elf64-x86-64.*
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Disassembly of section .text:
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[0-9a-f]+ <fn2>:
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+[0-9a-f]+: 55[ ]+push %rbp
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+[0-9a-f]+: 48 89 e5[ ]+mov %rsp,%rbp
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# GD -> IE because variable is not defined in executable
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+[0-9a-f]+: 64 48 8b 04 25 00 00[ ]+mov %fs:0x0,%rax
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+[0-9a-f]+: 00 00 *
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+[0-9a-f]+: 48 03 05 ([0-9a-f]{2} ){4}[ ]+add 0x[0-9a-f]+\(%rip\),%rax +# [0-9a-f]+ <_DYNAMIC\+0x[0-9a-f]+>
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# -> R_X86_64_TPOFF64 sG1
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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# GD -> IE because variable is not defined in executable where
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# the variable is referenced through IE too
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+[0-9a-f]+: 64 48 8b 04 25 00 00[ ]+mov %fs:0x0,%rax
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+[0-9a-f]+: 00 00 *
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+[0-9a-f]+: 48 03 05 ([0-9a-f]{2} ){4}[ ]+add 0x[0-9a-f]+\(%rip\),%rax +# [0-9a-f]+ <_DYNAMIC\+0x108>
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# -> R_X86_64_TPOFF64 sG2
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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# GD -> LE with global variable defined in executable
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+[0-9a-f]+: 64 48 8b 04 25 00 00[ ]+mov %fs:0x0,%rax
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+[0-9a-f]+: 00 00 *
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+[0-9a-f]+: 48 8d 80 60 ff ff ff[ ]+lea -0xa0\(%rax\),%rax
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# sg1
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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# GD -> LE with local variable defined in executable
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+[0-9a-f]+: 64 48 8b 04 25 00 00[ ]+mov %fs:0x0,%rax
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+[0-9a-f]+: 00 00 *
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+[0-9a-f]+: 48 8d 80 80 ff ff ff[ ]+lea -0x80\(%rax\),%rax
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# sl1
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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# GD -> LE with hidden variable defined in executable
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+[0-9a-f]+: 64 48 8b 04 25 00 00[ ]+mov %fs:0x0,%rax
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+[0-9a-f]+: 00 00 *
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+[0-9a-f]+: 48 8d 80 a0 ff ff ff[ ]+lea -0x60\(%rax\),%rax
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# sh1
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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# LD -> LE
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+[0-9a-f]+: 66 66 66 66 64 48 8b[ ]+data16 data16 data16 data16 mov %fs:0x0,%rax
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+[0-9a-f]+: 04 25 00 00 00 00 *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 48 8d 90 81 ff ff ff[ ]+lea -0x7f\(%rax\),%rdx
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# sl1+1
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 4c 8d 88 86 ff ff ff[ ]+lea -0x7a\(%rax\),%r9
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# sl2+2
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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# LD -> LE against hidden variables
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+[0-9a-f]+: 66 66 66 66 64 48 8b[ ]+data16 data16 data16 data16 mov %fs:0x0,%rax
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+[0-9a-f]+: 04 25 00 00 00 00 *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 48 8d 90 a0 ff ff ff[ ]+lea -0x60\(%rax\),%rdx
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# sh1
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 48 8d 88 a7 ff ff ff[ ]+lea -0x59\(%rax\),%rcx
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# sh2+3
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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# IE against global var
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+[0-9a-f]+: 64 4c 8b 0c 25 00 00[ ]+mov %fs:0x0,%r9
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+[0-9a-f]+: 00 00 *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 4c 03 0d ([0-9a-f]{2} ){4}[ ]+add 0x[0-9a-f]+\(%rip\),%r9 +# [0-9a-f]+ <_DYNAMIC\+0x108>
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# -> R_X86_64_TPOFF64 sG2
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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# IE -> LE against global var defined in exec
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+[0-9a-f]+: 64 4c 8b 14 25 00 00[ ]+mov %fs:0x0,%r10
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+[0-9a-f]+: 00 00 *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 4d 8d 92 60 ff ff ff[ ]+lea -0xa0\(%r10\),%r10
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# sg1
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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# IE -> LE against local var
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+[0-9a-f]+: 64 48 8b 04 25 00 00[ ]+mov %fs:0x0,%rax
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+[0-9a-f]+: 00 00 *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 48 8d 80 80 ff ff ff[ ]+lea -0x80\(%rax\),%rax
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# sl1
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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# IE -> LE against hidden var
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+[0-9a-f]+: 64 48 8b 0c 25 00 00[ ]+mov %fs:0x0,%rcx
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+[0-9a-f]+: 00 00 *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 48 8d 89 a0 ff ff ff[ ]+lea -0x60\(%rcx\),%rcx
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# sh1
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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# Direct access through %fs
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# IE against global var
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+[0-9a-f]+: 48 8b 0d ([0-9a-f]{2} ){4}[ ]+mov 0x[0-9a-f]+\(%rip\),%rcx +# [0-9a-f]+ <_DYNAMIC\+0x100>
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# -> R_X86_64_TPOFF64 sG5
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 64 48 8b 11[ ]+mov %fs:\(%rcx\),%rdx
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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# IE->LE against local var
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+[0-9a-f]+: 49 c7 c3 90 ff ff ff[ ]+mov \$0xf+90,%r11
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# sl5
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 64 4d 8b 23[ ]+mov %fs:\(%r11\),%r12
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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# IE->LE against hidden var
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+[0-9a-f]+: 48 c7 c2 b0 ff ff ff[ ]+mov \$0xf+b0,%rdx
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 64 48 8b 12[ ]+mov %fs:\(%rdx\),%rdx
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# sh5
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: c9[ ]+leaveq *
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+[0-9a-f]+: c3[ ]+retq *
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[0-9a-f]+ <_start>:
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+[0-9a-f]+: 55[ ]+push %rbp
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+[0-9a-f]+: 48 89 e5[ ]+mov %rsp,%rbp
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# IE against global var
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+[0-9a-f]+: 64 4c 8b 1c 25 00 00[ ]+mov %fs:0x0,%r11
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+[0-9a-f]+: 00 00 *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 4c 03 1d ([0-9a-f]{2} ){4}[ ]+add 0x[0-9a-f]+\(%rip\),%r11 +# [0-9a-f]+ <_DYNAMIC\+0x118>
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# -> R_X86_64_TPOFF64 sG6
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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# IE -> LE against global var defined in exec
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+[0-9a-f]+: 64 48 8b 14 25 00 00[ ]+mov %fs:0x0,%rdx
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+[0-9a-f]+: 00 00 *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 48 8d 92 d4 ff ff ff[ ]+lea -0x2c\(%rdx\),%rdx
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# bg6
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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# IE -> LE against local var
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+[0-9a-f]+: 64 4c 8b 24 25 00 00[ ]+mov %fs:0x0,%r12
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+[0-9a-f]+: 00 00 *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 49 81 c4 f4 ff ff ff[ ]+add \$0xf+f4,%r12
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# bl6
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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# direct %fs access IE -> LE against local var
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+[0-9a-f]+: 48 c7 c2 fc ff ff ff[ ]+mov \$0xf+fc,%rdx
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# bl8
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 64 48 8b 02[ ]+mov %fs:\(%rdx\),%rax
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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# IE -> LE against hidden but not local var
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+[0-9a-f]+: 64 48 8b 14 25 00 00[ ]+mov %fs:0x0,%rdx
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+[0-9a-f]+: 00 00 *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 48 8d 92 b4 ff ff ff[ ]+lea -0x4c\(%rdx\),%rdx
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# sh6
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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# direct %fs access IE -> LE against hidden but not local var
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+[0-9a-f]+: 48 c7 c2 bc ff ff ff[ ]+mov \$0xf+bc,%rdx
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# sh8
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 64 48 8b 02[ ]+mov %fs:\(%rdx\),%rax
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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# LE, global var defined in exec
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+[0-9a-f]+: 64 48 8b 04 25 00 00[ ]+mov %fs:0x0,%rax
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+[0-9a-f]+: 00 00 *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 48 8d 90 64 ff ff ff[ ]+lea -0x9c\(%rax\),%rdx
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# sg2
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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# LE, local var, non-canonical sequence
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+[0-9a-f]+: 49 c7 c1 e6 ff ff ff[ ]+mov \$0xf+e6,%r9
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# bl2+2
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 64 48 8b 14 25 00 00[ ]+mov %fs:0x0,%rdx
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+[0-9a-f]+: 00 00 *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 4c 01 ca[ ]+add %r9,%rdx
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+[0-9a-f]+: 90[ ]+nop *
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+[0-9a-f]+: 90[ ]+nop *
|
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+[0-9a-f]+: 90[ ]+nop *
|
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+[0-9a-f]+: 90[ ]+nop *
|
|
# LE, hidden var defined in exec, non-canonical sequence
|
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+[0-9a-f]+: 64 48 8b 14 25 00 00[ ]+mov %fs:0x0,%rdx
|
|
+[0-9a-f]+: 00 00 *
|
|
+[0-9a-f]+: 90[ ]+nop *
|
|
+[0-9a-f]+: 90[ ]+nop *
|
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+[0-9a-f]+: 48 81 c2 a5 ff ff ff[ ]+add \$0xf+a5,%rdx
|
|
# sh2+1
|
|
+[0-9a-f]+: 90[ ]+nop *
|
|
+[0-9a-f]+: 90[ ]+nop *
|
|
+[0-9a-f]+: 90[ ]+nop *
|
|
+[0-9a-f]+: 90[ ]+nop *
|
|
# Direct %fs access
|
|
# LE, global var defined in exec
|
|
+[0-9a-f]+: 64 48 8b 04 25 68 ff[ ]+mov %fs:0xf+68,%rax
|
|
+[0-9a-f]+: ff ff *
|
|
# sg3
|
|
+[0-9a-f]+: 90[ ]+nop *
|
|
+[0-9a-f]+: 90[ ]+nop *
|
|
+[0-9a-f]+: 90[ ]+nop *
|
|
+[0-9a-f]+: 90[ ]+nop *
|
|
# LE, local var
|
|
+[0-9a-f]+: 64 4c 8b 14 25 eb ff[ ]+mov %fs:0xf+eb,%r10
|
|
+[0-9a-f]+: ff ff *
|
|
# bl3+3
|
|
+[0-9a-f]+: 90[ ]+nop *
|
|
+[0-9a-f]+: 90[ ]+nop *
|
|
+[0-9a-f]+: 90[ ]+nop *
|
|
+[0-9a-f]+: 90[ ]+nop *
|
|
# LE, hidden var defined in exec
|
|
+[0-9a-f]+: 64 48 8b 14 25 a9 ff[ ]+mov %fs:0xf+a9,%rdx
|
|
+[0-9a-f]+: ff ff *
|
|
# sh3+1
|
|
+[0-9a-f]+: 90[ ]+nop *
|
|
+[0-9a-f]+: 90[ ]+nop *
|
|
+[0-9a-f]+: 90[ ]+nop *
|
|
+[0-9a-f]+: 90[ ]+nop *
|
|
# LE, large model
|
|
+[0-9a-f]+: 48 ba a5 ff ff ff ff[ ]+movabs \$0xffffffffffffffa5,%rdx
|
|
+[0-9a-f]+: ff ff ff *
|
|
+[0-9a-f]+: c9[ ]+leaveq *
|
|
+[0-9a-f]+: c3[ ]+retq *
|