@@ -1,6 +1,6 @@
Notes on the SCFI testsuite in GAS:
-* At this time, SCFI machinery is only supported for x86_64.
+* At this time, SCFI machinery is only supported for x86_64 and aarch64.
* When adding more tests, please keep CFI annotations updated in the .s files.
Ideally the test should be run with and without --scfi (as is done currently
new file mode 100644
@@ -0,0 +1,30 @@
+.*: Assembler messages:
+.*:16: Error: untraceable control flow for func 'foo'
+
+AARCH64 GAS .*
+
+ 1 # Testcase for a variety of change of flow instructions
+ 2 # Because some of these are indirect branches, SCFI will bail out
+ 3 # with an error. This test merely checks that the ginsn creation
+ 4 # process can handle these insns gracefully.
+ 5 .text
+ 6 .align 2
+ 7 .global foo
+ 8 .type foo, %function
+ 8 ginsn: SYM FUNC_BEGIN
+ 9 foo:
+ 9 ginsn: SYM foo
+ 10 \?\?\?\? 00000094 bl dump_bt
+ 10 ginsn: CALL
+ 11 \?\?\?\? 02000014 b .L3
+ 11 ginsn: JMP
+ 12 \?\?\?\? 20021FD6 br x17
+ 12 ginsn: JMP %r17,
+ 13 .L3:
+ 13 ginsn: SYM .L3
+ 14 \?\?\?\? 60003FD6 blr x3
+ 14 ginsn: CALL
+ 15 \?\?\?\? C0035FD6 ret
+ 15 ginsn: RET
+ 16 .size foo, .-foo
+ 16 ginsn: SYM FUNC_END
new file mode 100644
@@ -0,0 +1,16 @@
+# Testcase for a variety of change of flow instructions
+# Because some of these are indirect branches, SCFI will bail out
+# with an error. This test merely checks that the ginsn creation
+# process can handle these insns gracefully.
+ .text
+ .align 2
+ .global foo
+ .type foo, %function
+foo:
+ bl dump_bt
+ b .L3
+ br x17
+.L3:
+ blr x3
+ ret
+ .size foo, .-foo
new file mode 100644
@@ -0,0 +1,40 @@
+AARCH64 GAS .*
+
+ 1 # Testcase for a variety of ld st instructions
+ 2 .text
+ 3 .align 2
+ 4 .global foo
+ 5 .type foo, %function
+ 5 ginsn: SYM FUNC_BEGIN
+ 6 foo:
+ 6 ginsn: SYM foo
+ 7 # ldstpair_indexed
+ 8 0000 FFFF8629 stp wzr, wzr, \[sp, 52\]!
+ 8 ginsn: ADD %r31, 52, %r31
+ 8 ginsn: STORE %r1, \[%r31\+0\]
+ 8 ginsn: STORE %r1, \[%r31\+4\]
+ 9 0004 E00782A9 stp x0, x1, \[sp, 32\]!
+ 9 ginsn: ADD %r31, 32, %r31
+ 9 ginsn: STORE %r0, \[%r31\+0\]
+ 9 ginsn: STORE %r1, \[%r31\+8\]
+ 10 0008 E827BC6D stp d8, d9, \[sp, -64\]!
+ 10 ginsn: ADD %r31, -64, %r31
+ 11 # Following is skipped from ginsn generation
+ 12 000c E00702AD stp q0, q1, \[sp, 64\]
+ 13 # ldstpair_off
+ 14 0010 FFFF0629 stp wzr, wzr, \[sp, 52\]
+ 14 ginsn: STORE %r1, \[%r31\+52\]
+ 14 ginsn: STORE %r1, \[%r31\+56\]
+ 15 0014 1F7840AD ldp q31, q30, \[x0\]
+ 16 0018 E827C46C ldp d8, d9, \[sp\], 64
+ 16 ginsn: ADD %r31, 64, %r31
+ 17 # ldst_imm9
+ 18 001c E7FF4F38 ldrb w7, \[sp, 255\]!
+ 18 ginsn: ADD %r31, 255, %r31
+ 18 ginsn: LOAD \[%r31\+0\], %r7
+ 19 0020 FDCFC23C ldr q29, \[sp, 44\]!
+ 19 ginsn: ADD %r31, 44, %r31
+ 20 0024 C0035FD6 ret
+ 20 ginsn: RET
+ 21 .size foo, .-foo
+ 21 ginsn: SYM FUNC_END
new file mode 100644
@@ -0,0 +1,21 @@
+# Testcase for a variety of ld st instructions
+ .text
+ .align 2
+ .global foo
+ .type foo, %function
+foo:
+# ldstpair_indexed
+ stp wzr, wzr, [sp, 52]!
+ stp x0, x1, [sp, 32]!
+ stp d8, d9, [sp, -64]!
+# Following is skipped from ginsn generation
+ stp q0, q1, [sp, 64]
+# ldstpair_off
+ stp wzr, wzr, [sp, 52]
+ ldp q31, q30, [x0]
+ ldp d8, d9, [sp], 64
+# ldst_imm9
+ ldrb w7, [sp, 255]!
+ ldr q29, [sp, 44]!
+ ret
+ .size foo, .-foo
new file mode 100644
@@ -0,0 +1,32 @@
+.*: Assembler messages:
+.*:9: Error: SCFI: unsupported stack manipulation pattern
+.*:15: Error: SCFI: forward pass failed for func 'foo'
+
+AARCH64 GAS .*
+
+
+ 1 # Testcase for a variety of misc instructions
+ 2 # Ensure graceful handling, irrespective of ginsn generation
+ 3 symbol:
+ 4 \?\?\?\? 7700 .string "w"
+ 5
+ 6 .type foo, %function
+ 6 ginsn: SYM FUNC_BEGIN
+ 7 foo:
+ 7 ginsn: SYM foo
+ 8 \?\?\?\? 00001024 mov x16, 4384
+ 8 82D2
+ 8 ginsn: MOV 4384, %r16
+ 9 \?\?\?\? FF63308B add sp, sp, x16
+ 9 ginsn: ADD %r31, %r16, %r31
+ 10 \?\?\?\? 00000090 adrp x0, symbol
+ 11 \?\?\?\? 1F000091 add sp, x0, :lo12:symbol
+ 11 ginsn: OTH 0, 0, %r31
+ 12 \?\?\?\? FF0F00D1 sub sp, sp, 3
+ 12 ginsn: SUB %r31, 3, %r31
+ 13 \?\?\?\? FF0F0091 add sp, sp, 3
+ 13 ginsn: ADD %r31, 3, %r31
+ 14 \?\?\?\? C0035FD6 ret
+ 14 ginsn: RET
+ 15 .size foo,.-foo
+ 15 ginsn: SYM FUNC_END
new file mode 100644
@@ -0,0 +1,15 @@
+# Testcase for a variety of misc instructions
+# Ensure graceful handling, irrespective of ginsn generation
+symbol:
+ .string "w"
+
+ .type foo, %function
+foo:
+ mov x16, 4384
+ add sp, sp, x16
+ adrp x0, symbol
+ add sp, x0, :lo12:symbol
+ sub sp, sp, 3
+ add sp, sp, 3
+ ret
+ .size foo,.-foo
new file mode 100644
@@ -0,0 +1,60 @@
+# Copyright (C) 2022-2023 Free Software Foundation, Inc.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
+
+if { ![is_elf_format] } then {
+ return
+}
+
+# common tests
+if { ([istarget "aarch64-*-*"]) } then {
+
+ global ASFLAGS
+ set old_ASFLAGS "$ASFLAGS"
+
+ run_list_test "ginsn-cofi-1" "--scfi=experimental -ali --warn"
+ run_list_test "ginsn-ldst-1" "--scfi=experimental -ali --warn"
+ run_list_test "ginsn-misc-1" "--scfi=experimental -ali --warn"
+
+ run_list_test "scfi-diag-1" "--scfi=experimental"
+ run_list_test "scfi-diag-2" "--scfi=experimental"
+
+ run_list_test "scfi-unsupported-1" "--scfi=experimental"
+
+ run_dump_test "scfi-ldrp-1"
+ run_list_test "scfi-ldrp-1" "--scfi=experimental --warn"
+ run_dump_test "scfi-ldrp-2"
+ run_list_test "scfi-ldrp-2" "--scfi=experimental --warn"
+
+ run_dump_test "scfi-strp-1"
+ run_list_test "scfi-strp-1" "--scfi=experimental --warn"
+ run_dump_test "scfi-strp-2"
+ run_list_test "scfi-strp-2" "--scfi=experimental --warn"
+
+ run_dump_test "scfi-cb-1"
+ run_list_test "scfi-cb-1" "--scfi=experimental --warn"
+ run_dump_test "scfi-cond-br-1"
+ run_list_test "scfi-cond-br-1" "--scfi=experimental --warn"
+
+ run_dump_test "scfi-cfg-1"
+ run_list_test "scfi-cfg-1" "--scfi=experimental --warn"
+
+ run_dump_test "scfi-cfg-2"
+ run_list_test "scfi-cfg-2" "--scfi=experimental --warn"
+
+ run_dump_test "scfi-cfg-3"
+ run_list_test "scfi-cfg-3" "--scfi=experimental --warn"
+
+}
new file mode 100644
@@ -0,0 +1,20 @@
+#as: --scfi=experimental -W
+#objdump: -Wf
+#name: Synthesize CFI for comp branch 1
+#...
+Contents of the .eh_frame section:
+
+
+0+0000 0+0010 0+0000 CIE
+ Version: 1
+ Augmentation: "zR"
+ Code alignment factor: 4
+ Data alignment factor: -8
+ Return address column: 30
+ Augmentation data: 1b
+ DW_CFA_def_cfa: r31 \(sp\) ofs 0
+
+0+0014 0+0010 00000018 FDE cie=00000000 pc=0+0000..0+0014
+ DW_CFA_nop
+
+#pass
new file mode 100644
@@ -0,0 +1,2 @@
+.*Assembler messages:
+.*5: Warning: SCFI ignores most user-specified CFI directives
new file mode 100644
@@ -0,0 +1,14 @@
+ .text
+ .global foo
+ .type foo, %function
+foo:
+ .cfi_startproc
+.L7:
+ add w4, w3, w1
+ cbnz w4, .L7
+ cbz w4, .L10
+ tbnz w0, #31, .L7
+.L10:
+ ret
+ .cfi_endproc
+ .size foo, .-foo
new file mode 100644
@@ -0,0 +1,31 @@
+#as: --scfi=experimental -W
+#objdump: -Wf
+#name: Synthesize CFI for cfg 1
+#...
+Contents of the .eh_frame section:
+
+
+0+0000 0+0010 0+0000 CIE
+ Version: 1
+ Augmentation: "zR"
+ Code alignment factor: 4
+ Data alignment factor: -8
+ Return address column: 30
+ Augmentation data: 1b
+ DW_CFA_def_cfa: r31 \(sp\) ofs 0
+
+0+0014 0+0020 0+0018 FDE cie=00000000 pc=0+0000..0+0068
+ DW_CFA_advance_loc: 4 to 0+0004
+ DW_CFA_def_cfa_offset: 48
+ DW_CFA_offset: r29 \(x29\) at cfa-48
+ DW_CFA_offset: r30 \(x30\) at cfa-40
+ DW_CFA_advance_loc: 4 to 0+0008
+ DW_CFA_def_cfa_register: r29 \(x29\)
+ DW_CFA_advance_loc: 92 to 0+0064
+ DW_CFA_def_cfa_register: r31 \(sp\)
+ DW_CFA_restore: r29 \(x29\)
+ DW_CFA_restore: r30 \(x30\)
+ DW_CFA_def_cfa_offset: 0
+ DW_CFA_nop
+
+#pass
new file mode 100644
@@ -0,0 +1,2 @@
+.*Assembler messages:
+.*6: Warning: SCFI ignores most user-specified CFI directives
new file mode 100644
@@ -0,0 +1,46 @@
+# Testcase for forward flow of SCFI information
+# and CFG creation as well. This testcase has two backward edges
+# (one of which is a loop) and one exit path.
+ .type foo, %function
+foo:
+ .cfi_startproc
+ stp x29, x30, [sp, -48]!
+ .cfi_def_cfa_offset 48
+ .cfi_offset 29, -48
+ .cfi_offset 30, -40
+ mov x29, sp
+ .cfi_def_cfa_register 29
+ str x0, [sp, 24]
+ adrp x0, :got:xyz
+ str x0, [sp, 40]
+ b .L7
+.L10:
+ ldr x0, [sp, 40]
+ ldr x0, [x0]
+ mov x1, x0
+ ldr x0, [sp, 24]
+ bl strcmp
+ cmp w0, 0
+ bne .L8
+ ldr x0, [sp, 40]
+ ldr w0, [x0, 8]
+ b .L9
+.L8:
+ ldr x0, [sp, 40]
+ add x0, x0, 24
+ str x0, [sp, 40]
+.L7:
+ ldr x0, [sp, 40]
+ ldr w0, [x0, 8]
+ cmp w0, 0
+ bne .L10
+ mov w0, 0
+.L9:
+ ldp x29, x30, [sp], 48
+ .cfi_def_cfa_register 31
+ .cfi_restore 30
+ .cfi_restore 29
+ .cfi_def_cfa_offset 0
+ ret
+ .cfi_endproc
+ .size foo, .-foo
new file mode 100644
@@ -0,0 +1,40 @@
+#as: --scfi=experimental -W
+#objdump: -Wf
+#name: Synthesize CFI for cfg 2
+#...
+Contents of the .eh_frame section:
+
+
+0+0000 0+0010 0+0000 CIE
+ Version: 1
+ Augmentation: "zR"
+ Code alignment factor: 4
+ Data alignment factor: -8
+ Return address column: 30
+ Augmentation data: 1b
+ DW_CFA_def_cfa: r31 \(sp\) ofs 0
+
+0+0014 0+[0-9a-f]+ 0+0018 FDE cie=00000000 pc=0+0000..0+0028
+ DW_CFA_advance_loc: 4 to 0+0004
+ DW_CFA_def_cfa_offset: 48
+ DW_CFA_offset: r29 \(x29\) at cfa-48
+ DW_CFA_offset: r30 \(x30\) at cfa-40
+ DW_CFA_advance_loc: 4 to 0+0008
+ DW_CFA_def_cfa_register: r29 \(x29\)
+ DW_CFA_advance_loc: 8 to 0+0010
+ DW_CFA_remember_state
+ DW_CFA_advance_loc: 8 to 0+0018
+ DW_CFA_def_cfa_register: r31 \(sp\)
+ DW_CFA_restore: r29 \(x29\)
+ DW_CFA_restore: r30 \(x30\)
+ DW_CFA_def_cfa_offset: 0
+ DW_CFA_advance_loc: 4 to 0+001c
+ DW_CFA_restore_state
+ DW_CFA_advance_loc: 8 to 0+0024
+ DW_CFA_def_cfa_register: r31 \(sp\)
+ DW_CFA_restore: r29 \(x29\)
+ DW_CFA_restore: r30 \(x30\)
+ DW_CFA_def_cfa_offset: 0
+ DW_CFA_nop
+
+#pass
new file mode 100644
@@ -0,0 +1,2 @@
+.*Assembler messages:
+.*13: Warning: SCFI ignores most user-specified CFI directives
new file mode 100644
@@ -0,0 +1,42 @@
+# Testcase for backward flow of SCFI state.
+# The cfg has two exit paths, with epilogue duplicated in
+# the two.
+#
+# SCFI must synthesize the remember_state / restore_state pair.
+# Note how SCFI does not necessary generate the least number of
+# CFI directives (.cfi_remember_state can possibly be clubbed
+# together with other immediately following CFI directives).
+# This is not a correctness issue, however.
+ .global foo
+ .type foo, %function
+foo:
+ .cfi_startproc
+ stp x29, x30, [sp, -48]!
+ .cfi_def_cfa_offset 48
+ .cfi_offset 29, -48
+ .cfi_offset 30, -40
+ mov x29, sp
+ .cfi_def_cfa_register 29
+ cmp w4, w19
+ bge .L1
+
+.L2:
+ .cfi_remember_state
+ bl bar
+ ldp x29, x30, [sp], 48
+ .cfi_def_cfa_register 31
+ .cfi_restore 29
+ .cfi_restore 30
+ .cfi_def_cfa_offset 0
+ ret
+.L1:
+ .cfi_restore_state
+ cbz w3, .L2
+ ldp x29, x30, [sp], 48
+ .cfi_def_cfa_register 31
+ .cfi_restore 29
+ .cfi_restore 30
+ .cfi_def_cfa_offset 0
+ ret
+ .cfi_endproc
+ .size foo, .-foo
new file mode 100644
@@ -0,0 +1,32 @@
+#as: --scfi=experimental -W
+#objdump: -Wf
+#name: Synthesize CFI for cfg 3
+#...
+Contents of the .eh_frame section:
+
+
+0+0000 0+0010 0+0000 CIE
+ Version: 1
+ Augmentation: "zR"
+ Code alignment factor: 4
+ Data alignment factor: -8
+ Return address column: 30
+ Augmentation data: 1b
+ DW_CFA_def_cfa: r31 \(sp\) ofs 0
+
+0+0014 0+0020 0+0018 FDE cie=00000000 pc=0+0000..0+002c
+ DW_CFA_advance_loc: 4 to 0+0004
+ DW_CFA_def_cfa_offset: 32
+ DW_CFA_offset: r29 \(x29\) at cfa-32
+ DW_CFA_offset: r30 \(x30\) at cfa-24
+ DW_CFA_advance_loc: 4 to 0+0008
+ DW_CFA_def_cfa_register: r29 \(x29\)
+ DW_CFA_advance_loc: 32 to 0+0028
+ DW_CFA_def_cfa_register: r31 \(sp\)
+ DW_CFA_restore: r29 \(x29\)
+ DW_CFA_restore: r30 \(x30\)
+ DW_CFA_def_cfa_offset: 0
+ DW_CFA_nop
+ DW_CFA_nop
+
+#pass
new file mode 100644
@@ -0,0 +1,2 @@
+.*Assembler messages:
+.*9: Warning: SCFI ignores most user-specified CFI directives
new file mode 100644
@@ -0,0 +1,34 @@
+# Testcase for cfg creation.
+# There is at least one bb here with a single GINSN_TYPE_SYMBOL instruction
+# for a user-defined label. This ginsn is visited in the fallthrough path of
+# another bb.
+ .text
+ .global main
+ .type main, %function
+main:
+ .cfi_startproc
+ stp x29, x30, [sp, -32]!
+ .cfi_def_cfa_offset 32
+ .cfi_offset 29, -32
+ .cfi_offset 30, -24
+ mov x29, sp
+ .cfi_def_cfa_register 29
+ cmp w0, 0
+ bne .L2
+# ldr x0, [sp, 24]
+# bl fclose
+ cmp w0, 0
+ beq .L3
+.L2:
+ mov w0, 1
+ b .L5
+.L3:
+ mov w0, 0
+.L5:
+ ldp x29, x30, [sp], 32
+ .cfi_def_cfa_register 31
+ .cfi_restore 29
+ .cfi_restore 30
+ .cfi_def_cfa_offset 0
+ ret
+ .cfi_endproc
new file mode 100644
@@ -0,0 +1,20 @@
+#as: --scfi=experimental -W
+#objdump: -Wf
+#name: Synthesize CFI for conditional br 1
+#...
+Contents of the .eh_frame section:
+
+
+0+0000 0+0010 0+0000 CIE
+ Version: 1
+ Augmentation: "zR"
+ Code alignment factor: 4
+ Data alignment factor: -8
+ Return address column: 30
+ Augmentation data: 1b
+ DW_CFA_def_cfa: r31 \(sp\) ofs 0
+
+0+0014 0+0010 00000018 FDE cie=00000000 pc=0+0000..0+0010
+ DW_CFA_nop
+
+#pass
new file mode 100644
@@ -0,0 +1,2 @@
+.*Assembler messages:
+.*6: Warning: SCFI ignores most user-specified CFI directives
new file mode 100644
@@ -0,0 +1,13 @@
+ .text
+ .align 2
+ .global foo
+ .type foo, %function
+foo:
+ .cfi_startproc
+ bge .L10
+ ble .L10
+ bne .L10
+.L10:
+ ret
+ .cfi_endproc
+ .size foo, .-foo
new file mode 100644
@@ -0,0 +1,2 @@
+.*Assembler messages:
+.*5: Warning: SCFI: ignored probable save/restore op with reg offset
new file mode 100644
@@ -0,0 +1,6 @@
+ .text
+ .globl foo
+ .type foo, @function
+foo:
+ str x19, [sp, x1]
+ .size foo, .-foo
new file mode 100644
@@ -0,0 +1,3 @@
+.*Assembler messages:
+.*7: Warning: SCFI ignores most user-specified CFI directives
+.*16: Warning: GINSN: found unreachable code in func 'foo'
new file mode 100644
@@ -0,0 +1,25 @@
+# Testcase that triggers a diagnostic for unreachable code for
+# the block of code after label .L2. This also serves as a testcase
+# for cfg creation, as the said code block should not have been
+# included in the CFG (and hence the warning).
+ .type foo, %function
+foo:
+ .cfi_startproc
+ ldr w1, [x0]
+ cmp w1, 8
+ stp x19, x20, [sp, 16]
+ .cfi_offset 19, 16
+ .cfi_offset 20, 24
+ b .L1
+.L2:
+ mov w0, w1
+ ret
+.L1:
+ mov w0, w1
+ ldp x19, x20, [sp, 16]
+ .cfi_restore 19
+ .cfi_restore 20
+ .cfi_def_cfa_offset 0
+ ret
+ .cfi_endproc
+ .size foo, .-foo
new file mode 100644
@@ -0,0 +1,59 @@
+#as: --scfi=experimental -W
+#objdump: -Wf
+#name: Synthesize CFI for ldp ldr instructions
+#...
+Contents of the .eh_frame section:
+
+00000000 0+0010 00000000 CIE
+ Version: 1
+ Augmentation: "zR"
+ Code alignment factor: 4
+ Data alignment factor: -8
+ Return address column: 30
+ Augmentation data: 1b
+ DW_CFA_def_cfa: r31 \(sp\) ofs 0
+
+00000014 0+0048 00000018 FDE cie=00000000 pc=0+0000..0+0040
+ DW_CFA_advance_loc: 4 to 0+0004
+ DW_CFA_def_cfa_offset: 128
+ DW_CFA_offset: r29 \(x29\) at cfa-128
+ DW_CFA_offset: r30 \(x30\) at cfa-120
+ DW_CFA_advance_loc: 4 to 0+0008
+ DW_CFA_def_cfa_register: r29 \(x29\)
+ DW_CFA_advance_loc: 4 to 0+000c
+ DW_CFA_offset: r19 \(x19\) at cfa-112
+ DW_CFA_offset: r20 \(x20\) at cfa-104
+ DW_CFA_advance_loc: 4 to 0+0010
+ DW_CFA_offset: r21 \(x21\) at cfa-96
+ DW_CFA_offset: r22 \(x22\) at cfa-88
+ DW_CFA_advance_loc: 4 to 0+0014
+ DW_CFA_offset: r23 \(x23\) at cfa-80
+ DW_CFA_offset: r24 \(x24\) at cfa-72
+ DW_CFA_advance_loc: 4 to 0+0018
+ DW_CFA_offset: r25 \(x25\) at cfa-64
+ DW_CFA_offset: r26 \(x26\) at cfa-56
+ DW_CFA_advance_loc: 4 to 0+001c
+ DW_CFA_offset: r27 \(x27\) at cfa-48
+ DW_CFA_advance_loc: 8 to 0+0024
+ DW_CFA_def_cfa_register: r31 \(sp\)
+ DW_CFA_advance_loc: 4 to 0+0028
+ DW_CFA_restore: r19 \(x19\)
+ DW_CFA_restore: r20 \(x20\)
+ DW_CFA_advance_loc: 4 to 0+002c
+ DW_CFA_restore: r21 \(x21\)
+ DW_CFA_restore: r22 \(x22\)
+ DW_CFA_advance_loc: 4 to 0+0030
+ DW_CFA_restore: r23 \(x23\)
+ DW_CFA_restore: r24 \(x24\)
+ DW_CFA_advance_loc: 4 to 0+0034
+ DW_CFA_restore: r25 \(x25\)
+ DW_CFA_restore: r26 \(x26\)
+ DW_CFA_advance_loc: 4 to 0+0038
+ DW_CFA_restore: r27 \(x27\)
+ DW_CFA_advance_loc: 4 to 0+003c
+ DW_CFA_restore: r29 \(x29\)
+ DW_CFA_restore: r30 \(x30\)
+ DW_CFA_def_cfa_offset: 0
+ DW_CFA_nop
+
+#pass
new file mode 100644
@@ -0,0 +1,2 @@
+.*Assembler messages:
+.*8: Warning: SCFI ignores most user-specified CFI directives
new file mode 100644
@@ -0,0 +1,52 @@
+# Testcase for various ldp / ldr instructions.
+# This test also serves for checking callee-saved regs.
+ .text
+ .align 2
+ .global foo
+ .type foo, %function
+foo:
+ .cfi_startproc
+ stp x29, x30, [sp, -128]!
+ .cfi_def_cfa_offset 128
+ .cfi_offset 29, -128
+ .cfi_offset 30, -120
+ mov x29, sp
+ .cfi_def_cfa_register 29
+ stp x19, x20, [sp, 16]
+ .cfi_offset 19, -112
+ .cfi_offset 20, -104
+ stp x21, x22, [sp, 32]
+ .cfi_offset 21, -96
+ .cfi_offset 22, -88
+ stp x23, x24, [sp, 48]
+ .cfi_offset 23, -80
+ .cfi_offset 24, -72
+ stp x25, x26, [sp, 64]
+ .cfi_offset 25, -64
+ .cfi_offset 26, -56
+ str x27, [sp, 80]
+ .cfi_offset 27, -48
+ mov w0, 0
+ mov sp, x29
+ .cfi_def_cfa_register 31
+ ldp x19, x20, [sp, 16]
+ .cfi_restore 19
+ .cfi_restore 20
+ ldp x21, x22, [sp, 32]
+ .cfi_restore 21
+ .cfi_restore 22
+ ldp x23, x24, [sp, 48]
+ .cfi_restore 23
+ .cfi_restore 24
+ ldp x25, x26, [sp, 64]
+ .cfi_restore 25
+ .cfi_restore 26
+ ldr x27, [sp, 80]
+ .cfi_restore 27
+ ldp x29, x30, [sp], 128
+ .cfi_restore 29
+ .cfi_restore 30
+ .cfi_def_cfa_offset 0
+ ret
+ .cfi_endproc
+ .size foo, .-foo
new file mode 100644
@@ -0,0 +1,33 @@
+#as: --scfi=experimental -W
+#objdump: -Wf
+#name: Synthesize CFI for ldr insns 2
+#...
+Contents of the .eh_frame section:
+
+00000000 0+0010 00000000 CIE
+ Version: 1
+ Augmentation: "zR"
+ Code alignment factor: 4
+ Data alignment factor: -8
+ Return address column: 30
+ Augmentation data: 1b
+ DW_CFA_def_cfa: r31 \(sp\) ofs 0
+
+00000014 0+[0-9a-f]+ 00000018 FDE cie=00000000 pc=0+0000..0+0018
+ DW_CFA_advance_loc: 4 to 0+0004
+ DW_CFA_def_cfa_offset: 128
+ DW_CFA_offset: r29 \(x29\) at cfa-128
+ DW_CFA_offset: r30 \(x30\) at cfa-120
+ DW_CFA_advance_loc: 4 to 0+0008
+ DW_CFA_def_cfa_register: r29 \(x29\)
+ DW_CFA_advance_loc: 4 to 0+000c
+ DW_CFA_def_cfa_register: r31 \(sp\)
+ DW_CFA_advance_loc: 4 to 0+0010
+ DW_CFA_restore: r29 \(x29\)
+ DW_CFA_def_cfa_offset: 120
+ DW_CFA_advance_loc: 4 to 0+0014
+ DW_CFA_restore: r30 \(x30\)
+ DW_CFA_def_cfa_offset: 0
+ DW_CFA_nop
+
+#pass
new file mode 100644
@@ -0,0 +1,2 @@
+.*Assembler messages:
+.*7: Warning: SCFI ignores most user-specified CFI directives
new file mode 100644
@@ -0,0 +1,26 @@
+# Testcase for various ldp / ldr instructions
+ .text
+ .align 2
+ .global foo
+ .type foo, %function
+foo:
+ .cfi_startproc
+ stp x29, x30, [sp, -128]!
+ .cfi_def_cfa_offset 128
+ .cfi_offset 29, -128
+ .cfi_offset 30, -120
+ mov x29, sp
+ .cfi_def_cfa_register 29
+ mov sp, x29
+ .cfi_def_cfa_register 31
+# Post-indexed ldr
+ ldr x29, [sp], 8
+ .cfi_restore 29
+ .cfi_def_cfa_offset 120
+# Post-indexed ldr
+ ldr x30, [sp], 120
+ .cfi_restore 30
+ .cfi_def_cfa_offset 0
+ ret
+ .cfi_endproc
+ .size foo, .-foo
new file mode 100644
@@ -0,0 +1,39 @@
+#as: --scfi=experimental -W
+#objdump: -Wf
+#name: Synthesize CFI for str stp insns 1
+#...
+Contents of the .eh_frame section:
+
+00000000 0+0010 00000000 CIE
+ Version: 1
+ Augmentation: "zR"
+ Code alignment factor: 4
+ Data alignment factor: -8
+ Return address column: 30
+ Augmentation data: 1b
+ DW_CFA_def_cfa: r31 \(sp\) ofs 0
+
+00000014 0+0030 00000018 FDE cie=00000000 pc=0+0000..0+002c
+ DW_CFA_advance_loc: 4 to 0+0004
+ DW_CFA_def_cfa_offset: 128
+ DW_CFA_offset: r29 \(x29\) at cfa-128
+ DW_CFA_offset: r30 \(x30\) at cfa-120
+ DW_CFA_advance_loc: 4 to 0+0008
+ DW_CFA_def_cfa_register: r29 \(x29\)
+ DW_CFA_advance_loc: 4 to 0+000c
+ DW_CFA_offset: r19 \(x19\) at cfa-112
+ DW_CFA_offset: r20 \(x20\) at cfa-104
+ DW_CFA_advance_loc: 4 to 0+0010
+ DW_CFA_offset: r21 \(x21\) at cfa-96
+ DW_CFA_offset: r22 \(x22\) at cfa-88
+ DW_CFA_advance_loc: 4 to 0+0014
+ DW_CFA_offset: r23 \(x23\) at cfa-80
+ DW_CFA_offset: r24 \(x24\) at cfa-72
+ DW_CFA_advance_loc: 4 to 0+0018
+ DW_CFA_offset: r25 \(x25\) at cfa-64
+ DW_CFA_offset: r26 \(x26\) at cfa-56
+ DW_CFA_advance_loc: 4 to 0+001c
+ DW_CFA_offset: r27 \(x27\) at cfa-48
+ DW_CFA_nop
+
+#pass
new file mode 100644
@@ -0,0 +1,2 @@
+.*Assembler messages:
+.*6: Warning: SCFI ignores most user-specified CFI directives
new file mode 100644
@@ -0,0 +1,37 @@
+## Testcase with a variety of str/stp instructions
+ .text
+ .globl foo
+ .type foo, @function
+foo:
+ .cfi_startproc
+# Pre-indexed addressing is like offset addressing, except that
+# the base pointer is updated as a result of the instruction.
+ stp x29, x30, [sp, -128]!
+ .cfi_def_cfa_offset 128
+ .cfi_offset 29, -128
+ .cfi_offset 30, -120
+ mov x29, sp
+ .cfi_def_cfa_register 29
+# Offset addressing mode is when ann offset can be applied optionally to the
+# base address.
+ stp x19, x20, [sp, 16]
+ .cfi_offset 19, -112
+ .cfi_offset 20, -104
+ stp x21, x22, [sp, 32]
+ .cfi_offset 21, -96
+ .cfi_offset 22, -88
+ stp x23, x24, [sp, 48]
+ .cfi_offset 23, -80
+ .cfi_offset 24, -72
+ stp x25, x26, [sp, 64]
+ .cfi_offset 25, -64
+ .cfi_offset 26, -56
+ str x27, [sp, 80]
+ .cfi_offset 27, -48
+# Stores non callee-saved register on stack.
+ str w0, [x29, 124]
+ str wzr, [x29, 120]
+ str w0, [x29, 120]
+ ret
+ .cfi_endproc
+ .size foo, .-foo
new file mode 100644
@@ -0,0 +1,35 @@
+#as: --scfi=experimental -W
+#objdump: -Wf
+#name: Synthesize CFI for str insns 2
+#...
+Contents of the .eh_frame section:
+
+00000000 0+0010 00000000 CIE
+ Version: 1
+ Augmentation: "zR"
+ Code alignment factor: 4
+ Data alignment factor: -8
+ Return address column: 30
+ Augmentation data: 1b
+ DW_CFA_def_cfa: r31 \(sp\) ofs 0
+
+00000014 0+0028 00000018 FDE cie=00000000 pc=0+0000..0+001c
+ DW_CFA_advance_loc: 4 to 0+0004
+ DW_CFA_def_cfa_offset: 128
+ DW_CFA_offset: r29 \(x29\) at cfa-128
+ DW_CFA_offset: r30 \(x30\) at cfa-120
+ DW_CFA_advance_loc: 4 to 0+0008
+ DW_CFA_def_cfa_register: r29 \(x29\)
+ DW_CFA_advance_loc: 4 to 0+000c
+ DW_CFA_offset: r27 \(x27\) at cfa-128
+ DW_CFA_advance_loc: 4 to 0+0010
+ DW_CFA_def_cfa_register: r31 \(sp\)
+ DW_CFA_advance_loc: 4 to 0+0014
+ DW_CFA_restore: r29 \(x29\)
+ DW_CFA_def_cfa_offset: 120
+ DW_CFA_advance_loc: 4 to 0+0018
+ DW_CFA_restore: r30 \(x30\)
+ DW_CFA_def_cfa_offset: 0
+ DW_CFA_nop
+
+#pass
new file mode 100644
@@ -0,0 +1,2 @@
+.*Assembler messages:
+.*7: Warning: SCFI ignores most user-specified CFI directives
new file mode 100644
@@ -0,0 +1,30 @@
+# Testcase for a variety of stp/str including a post-indexed store
+ .text
+ .align 2
+ .global foo
+ .type foo, %function
+foo:
+ .cfi_startproc
+ stp x29, x30, [sp, -128]!
+ .cfi_def_cfa_offset 128
+ .cfi_offset 29, -128
+ .cfi_offset 30, -120
+ mov x29, sp
+ .cfi_def_cfa_register 29
+# post-indexed store, a stack corrupting one which over-writes
+# x29! Only for testing purposes for now
+# This does not generate a .cfi_def_cfa_offset 208 because
+# CFA is REG_FP based
+ str x27, [sp], 80
+ .cfi_offset 27, -128
+ mov sp, x29
+ .cfi_def_cfa_register 31
+ ldr x29, [sp], 8
+ .cfi_restore 29
+ .cfi_def_cfa_offset 120
+ ldr x30, [sp], 120
+ .cfi_restore 30
+ .cfi_def_cfa_offset 0
+ ret
+ .cfi_endproc
+ .size foo, .-foo
new file mode 100644
@@ -0,0 +1,4 @@
+.*Assembler messages:
+.*7: Warning: SCFI ignores most user-specified CFI directives
+.*9: Error: SCFI: unsupported stack manipulation pattern
+.*31: Error: SCFI: forward pass failed for func 'foo'
new file mode 100644
@@ -0,0 +1,31 @@
+# Testcase where immediate used for stack allocation is a wide
+# one. Since SCFI does not currently have any data-flow
+# capabilities, this is currently not supported.
+ .global foo
+ .type foo, %function
+foo:
+ .cfi_startproc
+ mov x16, 4384
+ sub sp, sp, x16
+ .cfi_def_cfa_offset 4384
+ stp x29, x30, [sp]
+ .cfi_offset 29, -4384
+ .cfi_offset 30, -4376
+ mov x29, sp
+ str x0, [sp, 24]
+ str x1, [sp, 16]
+ add x0, sp, 4096
+ add x0, x0, 112
+ bl bar
+.L1:
+ str xzr, [sp, 4376]
+.L2:
+ ldp x29, x30, [sp]
+ mov x16, 4384
+ add sp, sp, x16
+ .cfi_restore 29
+ .cfi_restore 30
+ .cfi_def_cfa_offset 0
+ ret
+ .cfi_endproc
+ .size foo, .-foo