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[LD][AARCH64]Add group relocations to create PC-relative offset.

Browse Source 
This is a patch to add linker support for group relocations to create a
16, 32, 48, or 64 bit PC-relative offset inline.

The following relocations are added along with the test cases:
BFD_RELOC_AARCH64_MOVW_PREL_G0, BFD_RELOC_AARCH64_MOVW_PREL_G0_NC,
BFD_RELOC_AARCH64_MOVW_PREL_G1, BFD_RELOC_AARCH64_MOVW_PREL_G1_NC,
BFD_RELOC_AARCH64_MOVW_PREL_G2, BFD_RELOC_AARCH64_MOVW_PREL_G2_NC,
BFD_RELOC_AARCH64_MOVW_PREL_G3.

bfd/

2018-01-24  Renlin Li  <renlin.li@arm.com>

	* elfnn-aarch64.c (elfNN_aarch64_final_link_relocate): Add support for
	BFD_RELOC_AARCH64_MOVW_PREL_G0, BFD_RELOC_AARCH64_MOVW_PREL_G0_NC,
	BFD_RELOC_AARCH64_MOVW_PREL_G1, BFD_RELOC_AARCH64_MOVW_PREL_G1_NC,
	BFD_RELOC_AARCH64_MOVW_PREL_G2, BFD_RELOC_AARCH64_MOVW_PREL_G2_NC,
	BFD_RELOC_AARCH64_MOVW_PREL_G3.
	* elfxx-aarch64.c (_bfd_aarch64_elf_put_addend): Likewise.
	(_bfd_aarch64_elf_resolve_relocation): Likewise.

ld/

2018-01-24  Renlin Li  <renlin.li@arm.com>

	* testsuite/ld-aarch64/aarch64-elf.exp: Run new testes.
	* testsuite/ld-aarch64/emit-relocs-287.s: Fix test case.
	* testsuite/ld-aarch64/emit-relocs-287.d: Fix expected output.
	* testsuite/ld-aarch64/emit-relocs-287-overflow.s: New.
	* testsuite/ld-aarch64/emit-relocs-287-overflow.d: New.
	* testsuite/ld-aarch64/emit-relocs-288.d: New.
	* testsuite/ld-aarch64/emit-relocs-288.s: New.
	* testsuite/ld-aarch64/emit-relocs-289.d: New.
	* testsuite/ld-aarch64/emit-relocs-289.s: New.
	* testsuite/ld-aarch64/emit-relocs-289-overflow.s: New.
	* testsuite/ld-aarch64/emit-relocs-289-overflow.d: New.
	* testsuite/ld-aarch64/emit-relocs-290.d: New.
	* testsuite/ld-aarch64/emit-relocs-290.s: New.
	* testsuite/ld-aarch64/emit-relocs-291.d: New.
	* testsuite/ld-aarch64/emit-relocs-291.s: New.
	* testsuite/ld-aarch64/emit-relocs-291-overflow.s: New.
	* testsuite/ld-aarch64/emit-relocs-291-overflow.d: New.
	* testsuite/ld-aarch64/emit-relocs-292.d: New.
	* testsuite/ld-aarch64/emit-relocs-292.s: New.
	* testsuite/ld-aarch64/emit-relocs-293.d: New.
	* testsuite/ld-aarch64/emit-relocs-293.s: New.
This commit is contained in:
Renlin Li
2018-01-18 12:17:55 +00:00
parent 322474019d
commit 1daf502a16
25 changed files with 192 additions and 16 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
bfd/ChangeLog
View File

@ -1,3 +1,13 @@
2018-01-24 Renlin Li <renlin.li@arm.com>
* elfnn-aarch64.c (elfNN_aarch64_final_link_relocate): Add support for
BFD_RELOC_AARCH64_MOVW_PREL_G0, BFD_RELOC_AARCH64_MOVW_PREL_G0_NC,
BFD_RELOC_AARCH64_MOVW_PREL_G1, BFD_RELOC_AARCH64_MOVW_PREL_G1_NC,
BFD_RELOC_AARCH64_MOVW_PREL_G2, BFD_RELOC_AARCH64_MOVW_PREL_G2_NC,
BFD_RELOC_AARCH64_MOVW_PREL_G3.
* elfxx-aarch64.c (_bfd_aarch64_elf_put_addend): Likewise.
(_bfd_aarch64_elf_resolve_relocation): Likewise.
2018-01-24 Renlin Li <renlin.li@arm.com>
* reloc.c: Add BFD_RELOC_AARCH64_MOVW_PREL_G0,

7
bfd/elfnn-aarch64.c
View File

@ -5462,6 +5462,13 @@ bad_ifunc_reloc:
case BFD_RELOC_AARCH64_ADR_HI21_PCREL:
case BFD_RELOC_AARCH64_ADR_LO21_PCREL:
case BFD_RELOC_AARCH64_LD_LO19_PCREL:
case BFD_RELOC_AARCH64_MOVW_PREL_G0:
case BFD_RELOC_AARCH64_MOVW_PREL_G0_NC:
case BFD_RELOC_AARCH64_MOVW_PREL_G1:
case BFD_RELOC_AARCH64_MOVW_PREL_G1_NC:
case BFD_RELOC_AARCH64_MOVW_PREL_G2:
case BFD_RELOC_AARCH64_MOVW_PREL_G2_NC:
case BFD_RELOC_AARCH64_MOVW_PREL_G3:
if (bfd_link_pic (info)
&& (input_section->flags & SEC_ALLOC) != 0
&& (input_section->flags & SEC_READONLY) != 0

14
bfd/elfxx-aarch64.c
View File

@ -301,6 +301,10 @@ _bfd_aarch64_elf_put_addend (bfd *abfd,
case BFD_RELOC_AARCH64_MOVW_G0_S:
case BFD_RELOC_AARCH64_MOVW_G1_S:
case BFD_RELOC_AARCH64_MOVW_G2_S:
case BFD_RELOC_AARCH64_MOVW_PREL_G0:
case BFD_RELOC_AARCH64_MOVW_PREL_G1:
case BFD_RELOC_AARCH64_MOVW_PREL_G2:
case BFD_RELOC_AARCH64_MOVW_PREL_G3:
case BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G0:
case BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G1:
case BFD_RELOC_AARCH64_TLSLD_MOVW_DTPREL_G2:
@ -333,6 +337,9 @@ _bfd_aarch64_elf_put_addend (bfd *abfd,
case BFD_RELOC_AARCH64_MOVW_G3:
case BFD_RELOC_AARCH64_MOVW_GOTOFF_G0_NC:
case BFD_RELOC_AARCH64_MOVW_GOTOFF_G1:
case BFD_RELOC_AARCH64_MOVW_PREL_G0_NC:
case BFD_RELOC_AARCH64_MOVW_PREL_G1_NC:
case BFD_RELOC_AARCH64_MOVW_PREL_G2_NC:
case BFD_RELOC_AARCH64_TLSDESC_OFF_G0_NC:
case BFD_RELOC_AARCH64_TLSDESC_OFF_G1:
case BFD_RELOC_AARCH64_TLSGD_MOVW_G0_NC:
@ -395,6 +402,13 @@ _bfd_aarch64_elf_resolve_relocation (bfd_reloc_code_real_type r_type,
case BFD_RELOC_AARCH64_ADR_LO21_PCREL:
case BFD_RELOC_AARCH64_BRANCH19:
case BFD_RELOC_AARCH64_LD_LO19_PCREL:
case BFD_RELOC_AARCH64_MOVW_PREL_G0:
case BFD_RELOC_AARCH64_MOVW_PREL_G0_NC:
case BFD_RELOC_AARCH64_MOVW_PREL_G1:
case BFD_RELOC_AARCH64_MOVW_PREL_G1_NC:
case BFD_RELOC_AARCH64_MOVW_PREL_G2:
case BFD_RELOC_AARCH64_MOVW_PREL_G2_NC:
case BFD_RELOC_AARCH64_MOVW_PREL_G3:
case BFD_RELOC_AARCH64_TLSDESC_ADR_PREL21:
case BFD_RELOC_AARCH64_TLSDESC_LD_PREL19:
case BFD_RELOC_AARCH64_TLSGD_ADR_PREL21:

24
ld/ChangeLog
View File

@ -1,3 +1,27 @@
2018-01-24 Renlin Li <renlin.li@arm.com>
* testsuite/ld-aarch64/aarch64-elf.exp: Run new testes.
* testsuite/ld-aarch64/emit-relocs-287.s: Fix test case.
* testsuite/ld-aarch64/emit-relocs-287.d: Fix expected output.
* testsuite/ld-aarch64/emit-relocs-287-overflow.s: New.
* testsuite/ld-aarch64/emit-relocs-287-overflow.d: New.
* testsuite/ld-aarch64/emit-relocs-288.d: New.
* testsuite/ld-aarch64/emit-relocs-288.s: New.
* testsuite/ld-aarch64/emit-relocs-289.d: New.
* testsuite/ld-aarch64/emit-relocs-289.s: New.
* testsuite/ld-aarch64/emit-relocs-289-overflow.s: New.
* testsuite/ld-aarch64/emit-relocs-289-overflow.d: New.
* testsuite/ld-aarch64/emit-relocs-290.d: New.
* testsuite/ld-aarch64/emit-relocs-290.s: New.
* testsuite/ld-aarch64/emit-relocs-291.d: New.
* testsuite/ld-aarch64/emit-relocs-291.s: New.
* testsuite/ld-aarch64/emit-relocs-291-overflow.s: New.
* testsuite/ld-aarch64/emit-relocs-291-overflow.d: New.
* testsuite/ld-aarch64/emit-relocs-292.d: New.
* testsuite/ld-aarch64/emit-relocs-292.s: New.
* testsuite/ld-aarch64/emit-relocs-293.d: New.
* testsuite/ld-aarch64/emit-relocs-293.s: New.
2018-01-20 H.J. Lu <hongjiu.lu@intel.com>
PR ld/22721

12
ld/testsuite/ld-aarch64/aarch64-elf.exp
View File

@ -143,7 +143,17 @@ run_dump_test_lp64 "emit-relocs-284"
run_dump_test_lp64 "emit-relocs-285"
run_dump_test_lp64 "emit-relocs-286"
run_dump_test_lp64 "emit-relocs-286-bad"
# 287-298 are not done yet
run_dump_test_lp64 "emit-relocs-287"
run_dump_test_lp64 "emit-relocs-287-overflow"
run_dump_test_lp64 "emit-relocs-288"
run_dump_test_lp64 "emit-relocs-289"
run_dump_test_lp64 "emit-relocs-289-overflow"
run_dump_test_lp64 "emit-relocs-290"
run_dump_test_lp64 "emit-relocs-291"
run_dump_test_lp64 "emit-relocs-291-overflow"
run_dump_test_lp64 "emit-relocs-292"
run_dump_test_lp64 "emit-relocs-293"
# 294-298 are not done yet
run_dump_test_lp64 "emit-relocs-299"
# 300 is not done yet
run_dump_test_lp64 "emit-relocs-301"

5
ld/testsuite/ld-aarch64/emit-relocs-287-overflow.d Normal file
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@ -0,0 +1,5 @@
#source: emit-relocs-287-overflow.s
#ld: -T relocs.ld --defsym tempy=0x20000 --defsym tempy2=0x0 -e0 --emit-relocs
#objdump: -dr
#error: .*\(.text\+0x\d+\): relocation truncated to fit: R_AARCH64_MOVW_PREL_G0 against symbol `tempy' .*
#error: .*\(.text\+0x\d+\): relocation truncated to fit: R_AARCH64_MOVW_PREL_G0 against symbol `tempy2' .*

5
ld/testsuite/ld-aarch64/emit-relocs-287-overflow.s Normal file
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@ -0,0 +1,5 @@
.comm gempy,4,4
.text
movz x4, :prel_g0:tempy
movz x4, :prel_g0:tempy2

14
ld/testsuite/ld-aarch64/emit-relocs-287.d
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@ -1,14 +1,10 @@
#source: emit-relocs-287.s
#ld: -T relocs.ld --defsym tempy=0x11000 --defsym tempy2=0x45000 --defsym tempy3=0x1234 --defsym _GOT_=0x10000 -e0 --emit-relocs
#ld: -T relocs.ld --defsym tempy=0x1ffff --defsym tempy2=0x4 -e0 --emit-relocs
#objdump: -dr
#...
+10000: 8a000000 and x0, x0, x0
+10004: 92400000 and x0, x0, #0x1
+10008: d2820004 movz x4, #0x1000
+10008: R_AARCH64_MOVW_PREL_G0 _GOT_
+1000c: d28a0007 movz x7, #0x5000
+1000c: R_AARCH64_MOVW_PREL_G0 _GOT_
+10010: d2824691 movz x17, #0x1234
+10010: R_AARCH64_MOVW_PREL_G0 _GOT_
+10000: d29fffe4 mov x4, #0xffff // #65535
10000: R_AARCH64_MOVW_PREL_G0 tempy
+10004: 929ffff1 mov x17, #0xffffffffffff0000 // #-65536
10004: R_AARCH64_MOVW_PREL_G0 tempy2

8
ld/testsuite/ld-aarch64/emit-relocs-287.s
View File

@ -1,9 +1,5 @@
.comm gempy,4,4
.text
and x0,x0,x0
and x0,x0,#0x1
movz x4, :prel_g0:tempy
movz x7, :prel_g0:tempy2
movz x17, :prel_g0:tempy3
movz x4, :prel_g0:tempy
movz x17, :prel_g0:tempy2

11
ld/testsuite/ld-aarch64/emit-relocs-288.d Normal file
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@ -0,0 +1,11 @@
#source: emit-relocs-288.s
#ld: -T relocs.ld --defsym tempy=0x1ffff --defsym tempy2=0x20000 --defsym tempy3=0x0 -e0 --emit-relocs
#objdump: -dr
#...
+10000: f29fffe4 movk x4, #0xffff
10000: R_AARCH64_MOVW_PREL_G0_NC tempy
+10004: f29fff87 movk x7, #0xfffc
10004: R_AARCH64_MOVW_PREL_G0_NC tempy2
+10008: f29fff11 movk x17, #0xfff8
10008: R_AARCH64_MOVW_PREL_G0_NC tempy3

5
ld/testsuite/ld-aarch64/emit-relocs-288.s Normal file
View File

@ -0,0 +1,5 @@
.comm gempy,4,4
.text
movk x4, :prel_g0_nc:tempy
movk x7, :prel_g0_nc:tempy2
movk x17, :prel_g0_nc:tempy3

4
ld/testsuite/ld-aarch64/emit-relocs-289-overflow.d Normal file
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@ -0,0 +1,4 @@
#source: emit-relocs-289-overflow.s
#ld: -T relocs.ld --defsym tempy=0x1100000000 -e0 --emit-relocs
#objdump: -dr
#error: .*\(.text\+0x\d+\): relocation truncated to fit: R_AARCH64_MOVW_PREL_G1 against symbol `tempy' .*

4
ld/testsuite/ld-aarch64/emit-relocs-289-overflow.s Normal file
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@ -0,0 +1,4 @@
.comm gempy,4,4
.text
movz x4, :prel_g1:tempy

10
ld/testsuite/ld-aarch64/emit-relocs-289.d Normal file
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@ -0,0 +1,10 @@
#source: emit-relocs-289.s
#ld: -Ttext 0x100000000 --defsym tempy=0x1ffffffff --defsym tempy2=0x4 -e0 --emit-relocs
#objdump: -dr
#...
+100000000: d2bfffe4 mov x4, #0xffff0000 // #4294901760
100000000: R_AARCH64_MOVW_PREL_G1 tempy
+100000004: 92bffff1 mov x17, #0xffffffff0000ffff // #-4294901761
100000004: R_AARCH64_MOVW_PREL_G1 tempy2

4
ld/testsuite/ld-aarch64/emit-relocs-289.s Normal file
View File

@ -0,0 +1,4 @@
.comm gempy,4,4
.text
movz x4, :prel_g1:tempy
movz x17, :prel_g1:tempy2

11
ld/testsuite/ld-aarch64/emit-relocs-290.d Normal file
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@ -0,0 +1,11 @@
#source: emit-relocs-290.s
#ld: -Ttext=0x100000000 --defsym tempy=0x200000000 --defsym tempy2=0x1ffff0000 --defsym tempy3=0x8 -e0 --emit-relocs
#objdump: -dr
#...
+100000000: f2a00004 movk x4, #0x0, lsl #16
100000000: R_AARCH64_MOVW_PREL_G1_NC tempy
+100000004: f2bfffc7 movk x7, #0xfffe, lsl #16
100000004: R_AARCH64_MOVW_PREL_G1_NC tempy2
+100000008: f2a00011 movk x17, #0x0, lsl #16
100000008: R_AARCH64_MOVW_PREL_G1_NC tempy3

5
ld/testsuite/ld-aarch64/emit-relocs-290.s Normal file
View File

@ -0,0 +1,5 @@
.comm gempy,4,4
.text
movk x4, :prel_g1_nc:tempy
movk x7, :prel_g1_nc:tempy2
movk x17, :prel_g1_nc:tempy3

4
ld/testsuite/ld-aarch64/emit-relocs-291-overflow.d Normal file
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@ -0,0 +1,4 @@
#source: emit-relocs-291-overflow.s
#ld: -T relocs.ld --defsym tempy=0x10000000000000 -e0 --emit-relocs
#objdump: -dr
#error: .*\(.text\+0x\d+\): relocation truncated to fit: R_AARCH64_MOVW_PREL_G2 against symbol `tempy' .*

4
ld/testsuite/ld-aarch64/emit-relocs-291-overflow.s Normal file
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@ -0,0 +1,4 @@
.comm gempy,4,4
.text
movz x4, :prel_g2:tempy

11
ld/testsuite/ld-aarch64/emit-relocs-291.d Normal file
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@ -0,0 +1,11 @@
#source: emit-relocs-291.s
#ld: -Ttext 0x1000000000000 --defsym tempy=0x1ffffffffffff --defsym tempy2=0x1ffff00000000 -defsym tempy3=0x8 -e0 --emit-relocs
#objdump: -dr
#...
+1000000000000: d2dfffe4 mov x4, #0xffff00000000 // #281470681743360
1000000000000: R_AARCH64_MOVW_PREL_G2 tempy
+1000000000004: d2dfffc7 mov x7, #0xfffe00000000 // #281466386776064
1000000000004: R_AARCH64_MOVW_PREL_G2 tempy2
+1000000000008: 92dffff1 mov x17, #0xffff0000ffffffff // #-281470681743361
1000000000008: R_AARCH64_MOVW_PREL_G2 tempy3

5
ld/testsuite/ld-aarch64/emit-relocs-291.s Normal file
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@ -0,0 +1,5 @@
.comm gempy,4,4
.text
movz x4, :prel_g2:tempy
movz x7, :prel_g2:tempy2
movz x17, :prel_g2:tempy3

11
ld/testsuite/ld-aarch64/emit-relocs-292.d Normal file
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@ -0,0 +1,11 @@
#source: emit-relocs-292.s
#ld: -Ttext 0x1000000000000 --defsym tempy=0x2000000000000 --defsym tempy2=0x1ffff00000004 --defsym tempy3=0x4 -e0 --emit-relocs
#objdump: -dr
#...
+1000000000000: f2c00004 movk x4, #0x0, lsl #32
1000000000000: R_AARCH64_MOVW_PREL_G2_NC tempy
+1000000000004: f2dfffe7 movk x7, #0xffff, lsl #32
1000000000004: R_AARCH64_MOVW_PREL_G2_NC tempy2
+1000000000008: f2dffff1 movk x17, #0xffff, lsl #32
1000000000008: R_AARCH64_MOVW_PREL_G2_NC tempy3

6
ld/testsuite/ld-aarch64/emit-relocs-292.s Normal file
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@ -0,0 +1,6 @@
.comm gempy,4,4
.text
movk x4, :prel_g2_nc:tempy
movk x7, :prel_g2_nc:tempy2
movk x17, :prel_g2_nc:tempy3

9
ld/testsuite/ld-aarch64/emit-relocs-293.d Normal file
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@ -0,0 +1,9 @@
#source: emit-relocs-293.s
#ld: -Ttext 0x1000000000000 --defsym tempy=0x2000000000000000 --defsym tempy2=0x8 -e0 --emit-relocs
#objdump: -dr
#...
+1000000000000: d2e3ffe4 mov x4, #0x1fff000000000000 // #2305561534236983296
1000000000000: R_AARCH64_MOVW_PREL_G3 tempy
+1000000000004: 92e00007 movn x7, #0x0, lsl #48
1000000000004: R_AARCH64_MOVW_PREL_G3 tempy2

5
ld/testsuite/ld-aarch64/emit-relocs-293.s Normal file
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@ -0,0 +1,5 @@
.comm gempy,4,4
.text
movz x4, :prel_g3:tempy
movz x7, :prel_g3:tempy2