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We can generate i386 TLS code sequences for general and local dynamic models without PLT, which uses indirect call via GOT: call *___tls_get_addr@GOT(%reg) where EBX register isn't required as GOT base, instead of direct call: call ___tls_get_addr[@PLT] which requires EBX register as GOT base. 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, 7-byte lea instruction before call instruction is replaced by 6-byte one 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 a 6-byte lea instruction as nop, instead of a 1-byte nop plus a 4-byte lea instruction. Since linker may convert call ___tls_get_addr[@PLT] to addr32 call ____tls_get_addr when producing static executable, both patterns are recognized. bfd/ * elf64-i386.c (elf_i386_link_hash_entry): Add tls_get_addr. (elf_i386_link_hash_newfunc): Initialize tls_get_addr to 2. (elf_i386_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_i386_convert_load_reloc): Always use addr32 prefix for indirect ___tls_get_addr call via GOT. (elf_i386_relocate_section): Handle GD->LE, GD->IE and LD->LE transitions with indirect call and direct call with the addr32 prefix. ld/ * testsuite/ld-i386/i386.exp: Run libtlspic2.so, tlsbin2, tlsgd3, tlsld2, tlsgd4, tlspie3a, tlspie3b and tlspie3c. * testsuite/ld-i386/pass.out: New file. * testsuite/ld-i386/tls-def1.c: Likewise. * testsuite/ld-i386/tls-gd1.S: Likewise. * testsuite/ld-i386/tls-ld1.S: Likewise. * testsuite/ld-i386/tls-main1.c: Likewise. * testsuite/ld-i386/tls.exp: Likewise. * testsuite/ld-i386/tlsbin2-nacl.rd: Likewise. * testsuite/ld-i386/tlsbin2.dd: Likewise. * testsuite/ld-i386/tlsbin2.rd: Likewise. * testsuite/ld-i386/tlsbin2.sd: Likewise. * testsuite/ld-i386/tlsbin2.td: Likewise. * testsuite/ld-i386/tlsbinpic2.s: Likewise. * testsuite/ld-i386/tlsgd3.dd: Likewise. * testsuite/ld-i386/tlsgd3.s: Likewise. * testsuite/ld-i386/tlsgd4.d: Likewise. * testsuite/ld-i386/tlsgd4.s: Likewise. * testsuite/ld-i386/tlsld2.s: Likewise. * testsuite/ld-i386/tlspic2-nacl.rd: Likewise. * testsuite/ld-i386/tlspic2.dd: Likewise. * testsuite/ld-i386/tlspic2.rd: Likewise. * testsuite/ld-i386/tlspic2.sd: Likewise. * testsuite/ld-i386/tlspic2.td: Likewise. * testsuite/ld-i386/tlspic3.s: Likewise. * testsuite/ld-i386/tlspie3.s: Likewise. * testsuite/ld-i386/tlspie3a.d: Likewise. * testsuite/ld-i386/tlspie3b.d: Likewise. * testsuite/ld-i386/tlspie3c.d: Likewise.
65 lines
1.0 KiB
ArmAsm
65 lines
1.0 KiB
ArmAsm
.text
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.globl ___tls_get_addr
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.type ___tls_get_addr, @function
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___tls_get_addr:
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ret
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.size ___tls_get_addr, .-___tls_get_addr
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.globl _start
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.type _start, @function
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_start:
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pushl %ebp
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movl %esp, %ebp
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pushl %esi
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pushl %ebx
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call .L3
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.L3:
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popl %ebx
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addl $_GLOBAL_OFFSET_TABLE_+[.-.L3], %ebx
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movl %gs:foo2@NTPOFF, %esi
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addl %gs:foo1@NTPOFF, %esi
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movl foo3@GOTNTPOFF(%ebx), %eax
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addl %gs:(%eax), %esi
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leal foo4@TLSLDM(%edx), %eax
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call *___tls_get_addr@GOT(%edx)
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addl (%eax), %esi
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leal foo5@TLSGD(%ebx), %eax
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call *___tls_get_addr@GOT(%ebx)
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addl (%eax), %esi
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movl %esi, %eax
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popl %ebx
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popl %esi
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leave
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ret
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.size _start, .-_start
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.globl foo1
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.section .tbss,"awT",@nobits
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.align 4
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.type foo1, @object
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.size foo1, 4
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foo1:
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.zero 4
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.globl foo2
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.align 4
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.type foo2, @object
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.size foo2, 4
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foo2:
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.zero 4
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.globl foo3
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.align 4
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.type foo3, @object
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.size foo3, 4
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foo3:
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.zero 4
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.globl foo4
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.align 4
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.type foo4, @object
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.size foo4, 4
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foo4:
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.zero 4
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.globl foo5
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.align 4
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.type foo5, @object
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.size foo5, 4
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foo5:
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.zero 4
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