binutils-gdb/ld/testsuite/ld-x86-64/no-plt-extern1.S

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X86-64: Test external function reference without PLT To call an external function, the direct branch to the PLT entry can be replaced by an indirect branch via the GOT slot, which is similar to the first instruction in the PLT slot. Instead using the PLT slot as function address, the function address is retrieved from the GOT slot. If linker determines the function is defined locally, it converts indirect branch via the GOT slot to direct branch with a nop prefix and converts load via the GOT slot to load immediate or lea, * testsuite/ld-x86-64/libno-plt-1b.dd: Likewise. * testsuite/ld-x86-64/libno-plt-1b.rd: Likewise. * testsuite/ld-x86-64/no-plt-1a.dd: Likewise. * testsuite/ld-x86-64/no-plt-1a.rd: Likewise. * testsuite/ld-x86-64/no-plt-1b.dd: Likewise. * testsuite/ld-x86-64/no-plt-1b.rd: Likewise. * testsuite/ld-x86-64/no-plt-1c.dd: Likewise. * testsuite/ld-x86-64/no-plt-1c.rd: Likewise. * testsuite/ld-x86-64/no-plt-1d.dd: Likewise. * testsuite/ld-x86-64/no-plt-1d.rd: Likewise. * testsuite/ld-x86-64/no-plt-1e.dd: Likewise. * testsuite/ld-x86-64/no-plt-1e.rd: Likewise. * testsuite/ld-x86-64/no-plt-1f.dd: Likewise. * testsuite/ld-x86-64/no-plt-1f.rd: Likewise. * testsuite/ld-x86-64/no-plt-1g.dd: Likewise. * testsuite/ld-x86-64/no-plt-1g.rd: Likewise. * testsuite/ld-x86-64/no-plt-check1.S: Likewise. * testsuite/ld-x86-64/no-plt.exp: Likewise. * testsuite/ld-x86-64/no-plt-extern1.S: Likewise. * testsuite/ld-x86-64/no-plt-func1.c: Likewise. * testsuite/ld-x86-64/no-plt-main1.c: Likewise.
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.text
.p2align 4,,15
.globl get_func
.type get_func, @function
get_func:
movq func@GOTPCREL(%rip), %rax
ret
.size get_func, .-get_func
.p2align 4,,15
.globl call_func
.type call_func, @function
call_func:
jmp *func@GOTPCREL(%rip)
.size call_func, .-call_func
.globl func_p
.section .data.rel,"aw",@progbits
.type func_p, @object
func_p:
#ifdef __LP64__
.align 8
.size func_p, 8
.quad func
#else
.align 4
.size func_p, 4
.long func
#endif
X86-64: Test external function reference without PLT To call an external function, the direct branch to the PLT entry can be replaced by an indirect branch via the GOT slot, which is similar to the first instruction in the PLT slot. Instead using the PLT slot as function address, the function address is retrieved from the GOT slot. If linker determines the function is defined locally, it converts indirect branch via the GOT slot to direct branch with a nop prefix and converts load via the GOT slot to load immediate or lea, * testsuite/ld-x86-64/libno-plt-1b.dd: Likewise. * testsuite/ld-x86-64/libno-plt-1b.rd: Likewise. * testsuite/ld-x86-64/no-plt-1a.dd: Likewise. * testsuite/ld-x86-64/no-plt-1a.rd: Likewise. * testsuite/ld-x86-64/no-plt-1b.dd: Likewise. * testsuite/ld-x86-64/no-plt-1b.rd: Likewise. * testsuite/ld-x86-64/no-plt-1c.dd: Likewise. * testsuite/ld-x86-64/no-plt-1c.rd: Likewise. * testsuite/ld-x86-64/no-plt-1d.dd: Likewise. * testsuite/ld-x86-64/no-plt-1d.rd: Likewise. * testsuite/ld-x86-64/no-plt-1e.dd: Likewise. * testsuite/ld-x86-64/no-plt-1e.rd: Likewise. * testsuite/ld-x86-64/no-plt-1f.dd: Likewise. * testsuite/ld-x86-64/no-plt-1f.rd: Likewise. * testsuite/ld-x86-64/no-plt-1g.dd: Likewise. * testsuite/ld-x86-64/no-plt-1g.rd: Likewise. * testsuite/ld-x86-64/no-plt-check1.S: Likewise. * testsuite/ld-x86-64/no-plt.exp: Likewise. * testsuite/ld-x86-64/no-plt-extern1.S: Likewise. * testsuite/ld-x86-64/no-plt-func1.c: Likewise. * testsuite/ld-x86-64/no-plt-main1.c: Likewise.
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.section .note.GNU-stack,"",@progbits