binutils-gdb/ld/testsuite/ld-aarch64/tls-relax-ld-le-tiny-ilp32.d

#source: tls-relax-ld-le-tiny.s
#as: -mabi=ilp32
#ld: -m [aarch64_choose_ilp32_emul] -T relocs-ilp32.ld -e0
#objdump: -dr
#...
 +10000:	910003fd 	mov	x29, sp
 +10004:	d53bd040 	mrs	x0, tpidr_el0
 +10008:	11002000 	add	w0, w0, #0x8
 +1000c:	d503201f 	nop
 +10010:	91400001 	add	x1, x0, #0x0, lsl #12
 +10014:	91000021 	add	x1, x1, #0x0
 +10018:	90000000 	adrp	x0, 10000 <main>
 +1001c:	d65f03c0 	ret
ld: aarch64: fix TLS relaxation where TCB_SIZE is used TCB_SIZE is 2sizeof(void ), which is 0x10 for lp64, and 0x8 for ilp32. During relaxation, ld goes to do a replace: bl __tls_get_addr => add R0, R0, TCB_SIZE But actual implementation is: bfd_putl32 (0x91004000, contents + rel->r_offset + 4); Which is equivalent of add x0, x0, 0x10. This is wrong for ilp32. The possible fix for it is: bfd_putl32 (0x91000000 \| (TCB_SIZE<<10), contents + rel->r_offset + 4); But ilp32 also needs w-registers, so it's simpler to put proper instruction in #if/#else condition. There are 2 such relaxations in elfNN_aarch64_tls_relax(), and so 2 new tests added for ilp32 mode to test it. Yury * bfd/elfnn-aarch64.c: fix TLS relaxations for ilp32 where TCB_SIZE is used. * ld/testsuite/ld-aarch64/aarch64-elf.exp: Add tests for the case. * ld/testsuite/ld-aarch64/tls-relax-ld-le-small-ilp32.d: New file. * ld/testsuite/ld-aarch64/tls-relax-ld-le-tiny-ilp32.d: New file. Signed-off-by: Yury Norov <ynorov@caviumnetworks.com> 2016-12-03 21:20:43 +08:00			`#source: tls-relax-ld-le-tiny.s`
			`#as: -mabi=ilp32`
			`#ld: -m [aarch64_choose_ilp32_emul] -T relocs-ilp32.ld -e0`
			`#objdump: -dr`
			`#...`
			`+10000: 910003fd mov x29, sp`
			`+10004: d53bd040 mrs x0, tpidr_el0`
			`+10008: 11002000 add w0, w0, #0x8`
			`+1000c: d503201f nop`
			`+10010: 91400001 add x1, x0, #0x0, lsl #12`
			`+10014: 91000021 add x1, x1, #0x0`
			`+10018: 90000000 adrp x0, 10000 <main>`
			`+1001c: d65f03c0 ret`