binutils-gdb/gold/testsuite/pr20308_gd.S

	.text
	.p2align 4,,15
	.globl	get_gd
	.type	get_gd, @function
get_gd:
	pushl	%ebx
	call	__x86.get_pc_thunk.bx
	addl	$_GLOBAL_OFFSET_TABLE_, %ebx
	subl	$8, %esp
	leal	gd@tlsgd(,%ebx,1), %eax
	call	___tls_get_addr@PLT
	addl	$8, %esp
	popl	%ebx
	ret
	.size	get_gd, .-get_gd
	.p2align 4,,15
	.globl	set_gd
	.type	set_gd, @function
set_gd:
	pushl	%ebx
	call	__x86.get_pc_thunk.bx
	addl	$_GLOBAL_OFFSET_TABLE_, %ebx
	subl	$8, %esp
	leal	gd@tlsgd(%ebx), %eax
	call	___tls_get_addr@PLT
	nop
	movl	16(%esp), %edx
	movl	%edx, (%eax)
	addl	$8, %esp
	popl	%ebx
	ret
	.size	set_gd, .-set_gd
	.text
	.p2align 4,,15
	.globl	test_gd
	.type	test_gd, @function
test_gd:
	call	__x86.get_pc_thunk.cx
	addl	$_GLOBAL_OFFSET_TABLE_, %ecx
	subl	$12, %esp
	leal	gd@tlsgd(%ecx), %eax
	call	*___tls_get_addr@GOT(%ecx)
	movl	16(%esp), %ecx
	cmpl	%ecx, (%eax)
	sete	%al
	addl	$12, %esp
	movzbl	%al, %eax
	ret
	.size	test_gd, .-test_gd
	.section	.text.unlikely
	.section	.text.__x86.get_pc_thunk.bx,"axG",@progbits,__x86.get_pc_thunk.bx,comdat
	.globl	__x86.get_pc_thunk.bx
	.hidden	__x86.get_pc_thunk.bx
	.type	__x86.get_pc_thunk.bx, @function
__x86.get_pc_thunk.bx:
	movl	(%esp), %ebx
	ret
	.section	.text.__x86.get_pc_thunk.cx,"axG",@progbits,__x86.get_pc_thunk.cx,comdat
	.globl	__x86.get_pc_thunk.cx
	.hidden	__x86.get_pc_thunk.cx
	.type	__x86.get_pc_thunk.cx, @function
__x86.get_pc_thunk.cx:
	movl	(%esp), %ecx
	ret
	.section	.note.GNU-stack,"",@progbits
gold: Support 386 TLS code sequences without PLT There are extensions to 386 psABI: https://groups.google.com/forum/#!topic/ia32-abi/awsRSvJOJfs to call tls_get_addr via GOT: call ___tls_get_addr@GOT(%reg) where EBX register isn't required 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. PR gold/20308 i386.cc (Target_i386::Relocate::relocate): Allow R_386_GOT32X relocation against ___tls_get_addr. (Target_i386::Relocate::tls_gd_to_ie): Support indirect call to __tls_get_addr. (Target_i386::Relocate::tls_gd_to_le): Likewise. (Target_i386::Relocate::tls_ld_to_le): Likewise. * testsuite/Makefile.am (check_PROGRAMS): Add pr20308a_test, pr20308b_test, pr20308c_test, pr20308d_test, pr20308e_test. (pr20308a_test_SOURCES): New. (pr20308a_test_DEPENDENCIES): Likewise. (pr20308a_test_CFLAGS): Likewise. (pr20308a_test_LDFLAGS): Likewise. (pr20308a_test_LDADD): Likewise. (pr20308b_test_SOURCES): Likewise. (pr20308b_test_DEPENDENCIES): Likewise. (pr20308b_test_CFLAGS): Likewise. (pr20308b_test_LDFLAGS): Likewise. (pr20308b_test_LDADD): Likewise. (pr20308c_test_SOURCES): Likewise. (pr20308c_test_DEPENDENCIES): Likewise. (pr20308c_test_CFLAGS): Likewise. (pr20308c_test_LDFLAGS): Likewise. (pr20308c_test_LDADD): Likewise. (pr20308d_test_SOURCES): Likewise. (pr20308d_test_DEPENDENCIES): Likewise. (pr20308d_test_CFLAGS): Likewise. (pr20308d_test_LDFLAGS): Likewise. (pr20308d_test_LDADD): Likewise. (pr20308e_test_SOURCES): Likewise. (pr20308e_test_DEPENDENCIES): Likewise. (pr20308e_test_CFLAGS): Likewise. (pr20308e_test_LDFLAGS): Likewise. (pr20308e_test_LDADD): Likewise. (pr20308a.so): Likewise. (pr20308b.so): Likewise. (pr20308_gd.o): Likewise. (pr20308_ld.o): Likewise. (MOSTLYCLEANFILES): Add pr20308a.so pr20308b.so. * testsuite/Makefile.in: Regenerated. * testsuite/pr20308_def.c: New file. * testsuite/pr20308_gd.S: Likewise. * testsuite/pr20308_ld.S: Likewise. * testsuite/pr20308_main.c: Likewise. 2016-06-29 23:38:43 +08:00			`.text`
			`.p2align 4,,15`
			`.globl get_gd`
			`.type get_gd, @function`
			`get_gd:`
			`pushl %ebx`
			`call __x86.get_pc_thunk.bx`
			`addl $_GLOBAL_OFFSET_TABLE_, %ebx`
			`subl $8, %esp`
			`leal gd@tlsgd(,%ebx,1), %eax`
			`call ___tls_get_addr@PLT`
			`addl $8, %esp`
			`popl %ebx`
			`ret`
			`.size get_gd, .-get_gd`
			`.p2align 4,,15`
			`.globl set_gd`
			`.type set_gd, @function`
			`set_gd:`
			`pushl %ebx`
			`call __x86.get_pc_thunk.bx`
			`addl $_GLOBAL_OFFSET_TABLE_, %ebx`
			`subl $8, %esp`
			`leal gd@tlsgd(%ebx), %eax`
			`call ___tls_get_addr@PLT`
			`nop`
			`movl 16(%esp), %edx`
			`movl %edx, (%eax)`
			`addl $8, %esp`
			`popl %ebx`
			`ret`
			`.size set_gd, .-set_gd`
			`.text`
			`.p2align 4,,15`
			`.globl test_gd`
			`.type test_gd, @function`
			`test_gd:`
			`call __x86.get_pc_thunk.cx`
			`addl $_GLOBAL_OFFSET_TABLE_, %ecx`
			`subl $12, %esp`
			`leal gd@tlsgd(%ecx), %eax`
			`call *___tls_get_addr@GOT(%ecx)`
			`movl 16(%esp), %ecx`
			`cmpl %ecx, (%eax)`
			`sete %al`
			`addl $12, %esp`
			`movzbl %al, %eax`
			`ret`
			`.size test_gd, .-test_gd`
			`.section .text.unlikely`
			`.section .text.__x86.get_pc_thunk.bx,"axG",@progbits,__x86.get_pc_thunk.bx,comdat`
			`.globl __x86.get_pc_thunk.bx`
			`.hidden __x86.get_pc_thunk.bx`
			`.type __x86.get_pc_thunk.bx, @function`
			`__x86.get_pc_thunk.bx:`
			`movl (%esp), %ebx`
			`ret`
			`.section .text.__x86.get_pc_thunk.cx,"axG",@progbits,__x86.get_pc_thunk.cx,comdat`
			`.globl __x86.get_pc_thunk.cx`
			`.hidden __x86.get_pc_thunk.cx`
			`.type __x86.get_pc_thunk.cx, @function`
			`__x86.get_pc_thunk.cx:`
			`movl (%esp), %ecx`
			`ret`
			`.section .note.GNU-stack,"",@progbits`