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-rw-r--r--arch/s390/Makefile7
-rw-r--r--arch/s390/include/asm/dwarf.h12
-rw-r--r--arch/s390/kernel/vdso32/clock_getres.S4
-rw-r--r--arch/s390/kernel/vdso32/clock_gettime.S16
-rw-r--r--arch/s390/kernel/vdso32/getcpu.S4
-rw-r--r--arch/s390/kernel/vdso32/gettimeofday.S8
-rw-r--r--arch/s390/kernel/vdso64/clock_getres.S4
-rw-r--r--arch/s390/kernel/vdso64/clock_gettime.S20
-rw-r--r--arch/s390/kernel/vdso64/getcpu.S4
-rw-r--r--arch/s390/kernel/vdso64/gettimeofday.S8
10 files changed, 69 insertions, 18 deletions
diff --git a/arch/s390/Makefile b/arch/s390/Makefile
index 494bb9ad5edf..aa37ba79c762 100644
--- a/arch/s390/Makefile
+++ b/arch/s390/Makefile
@@ -88,10 +88,13 @@ KBUILD_CFLAGS += -DCC_USING_HOTPATCH
endif
endif
+# Test CFI features of binutils
+cfi := $(call as-instr,.cfi_startproc\n.cfi_val_offset 15$(comma)-160\n.cfi_endproc,-DCONFIG_AS_CFI_VAL_OFFSET=1)
+
KBUILD_CFLAGS += -mbackchain -msoft-float $(cflags-y)
KBUILD_CFLAGS += -pipe -fno-strength-reduce -Wno-sign-compare
-KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
-KBUILD_AFLAGS += $(aflags-y)
+KBUILD_CFLAGS += -fno-asynchronous-unwind-tables $(cfi)
+KBUILD_AFLAGS += $(aflags-y) $(cfi)
OBJCOPYFLAGS := -O binary
diff --git a/arch/s390/include/asm/dwarf.h b/arch/s390/include/asm/dwarf.h
index dffdb81e534f..4f21ae561e4d 100644
--- a/arch/s390/include/asm/dwarf.h
+++ b/arch/s390/include/asm/dwarf.h
@@ -4,6 +4,18 @@
#ifdef __ASSEMBLY__
+#define CFI_STARTPROC .cfi_startproc
+#define CFI_ENDPROC .cfi_endproc
+#define CFI_DEF_CFA_OFFSET .cfi_def_cfa_offset
+#define CFI_ADJUST_CFA_OFFSET .cfi_adjust_cfa_offset
+#define CFI_RESTORE .cfi_restore
+
+#ifdef CONFIG_AS_CFI_VAL_OFFSET
+#define CFI_VAL_OFFSET .cfi_val_offset
+#else
+#define CFI_VAL_OFFSET #
+#endif
+
#ifndef BUILD_VDSO
/*
* Emit CFI data in .debug_frame sections and not in .eh_frame
diff --git a/arch/s390/kernel/vdso32/clock_getres.S b/arch/s390/kernel/vdso32/clock_getres.S
index 6aeddf8e4bc7..eaf9cf1417f6 100644
--- a/arch/s390/kernel/vdso32/clock_getres.S
+++ b/arch/s390/kernel/vdso32/clock_getres.S
@@ -16,7 +16,7 @@
.globl __kernel_clock_getres
.type __kernel_clock_getres,@function
__kernel_clock_getres:
- .cfi_startproc
+ CFI_STARTPROC
basr %r1,0
la %r1,4f-.(%r1)
chi %r2,__CLOCK_REALTIME
@@ -38,7 +38,7 @@ __kernel_clock_getres:
3: lhi %r1,__NR_clock_getres /* fallback to svc */
svc 0
br %r14
+ CFI_ENDPROC
4: .long __CLOCK_REALTIME_RES
5: .long __CLOCK_COARSE_RES
- .cfi_endproc
.size __kernel_clock_getres,.-__kernel_clock_getres
diff --git a/arch/s390/kernel/vdso32/clock_gettime.S b/arch/s390/kernel/vdso32/clock_gettime.S
index d0ac32c413e2..a9418bf975db 100644
--- a/arch/s390/kernel/vdso32/clock_gettime.S
+++ b/arch/s390/kernel/vdso32/clock_gettime.S
@@ -16,8 +16,10 @@
.globl __kernel_clock_gettime
.type __kernel_clock_gettime,@function
__kernel_clock_gettime:
- .cfi_startproc
+ CFI_STARTPROC
ahi %r15,-16
+ CFI_DEF_CFA_OFFSET 176
+ CFI_VAL_OFFSET 15, -160
basr %r5,0
0: al %r5,21f-0b(%r5) /* get &_vdso_data */
chi %r2,__CLOCK_REALTIME_COARSE
@@ -70,9 +72,13 @@ __kernel_clock_gettime:
st %r1,4(%r3) /* store tp->tv_nsec */
lhi %r2,0
ahi %r15,16
+ CFI_DEF_CFA_OFFSET 160
+ CFI_RESTORE 15
br %r14
/* CLOCK_MONOTONIC_COARSE */
+ CFI_DEF_CFA_OFFSET 176
+ CFI_VAL_OFFSET 15, -160
9: l %r4,__VDSO_UPD_COUNT+4(%r5) /* load update counter */
tml %r4,0x0001 /* pending update ? loop */
jnz 9b
@@ -152,15 +158,21 @@ __kernel_clock_gettime:
st %r1,4(%r3) /* store tp->tv_nsec */
lhi %r2,0
ahi %r15,16
+ CFI_DEF_CFA_OFFSET 160
+ CFI_RESTORE 15
br %r14
/* Fallback to system call */
+ CFI_DEF_CFA_OFFSET 176
+ CFI_VAL_OFFSET 15, -160
19: lhi %r1,__NR_clock_gettime
svc 0
ahi %r15,16
+ CFI_DEF_CFA_OFFSET 160
+ CFI_RESTORE 15
br %r14
+ CFI_ENDPROC
20: .long 1000000000
21: .long _vdso_data - 0b
- .cfi_endproc
.size __kernel_clock_gettime,.-__kernel_clock_gettime
diff --git a/arch/s390/kernel/vdso32/getcpu.S b/arch/s390/kernel/vdso32/getcpu.S
index 539d92a2c61b..25515f3fbcea 100644
--- a/arch/s390/kernel/vdso32/getcpu.S
+++ b/arch/s390/kernel/vdso32/getcpu.S
@@ -15,7 +15,7 @@
.globl __kernel_getcpu
.type __kernel_getcpu,@function
__kernel_getcpu:
- .cfi_startproc
+ CFI_STARTPROC
la %r4,0
sacf 256
l %r5,__VDSO_CPU_NR(%r4)
@@ -29,5 +29,5 @@ __kernel_getcpu:
st %r4,0(%r3)
3: lhi %r2,0
br %r14
- .cfi_endproc
+ CFI_ENDPROC
.size __kernel_getcpu,.-__kernel_getcpu
diff --git a/arch/s390/kernel/vdso32/gettimeofday.S b/arch/s390/kernel/vdso32/gettimeofday.S
index 435f819c3e65..3c0db0fa6ad9 100644
--- a/arch/s390/kernel/vdso32/gettimeofday.S
+++ b/arch/s390/kernel/vdso32/gettimeofday.S
@@ -16,8 +16,10 @@
.globl __kernel_gettimeofday
.type __kernel_gettimeofday,@function
__kernel_gettimeofday:
- .cfi_startproc
+ CFI_STARTPROC
ahi %r15,-16
+ CFI_ADJUST_CFA_OFFSET 16
+ CFI_VAL_OFFSET 15, -160
basr %r5,0
0: al %r5,13f-0b(%r5) /* get &_vdso_data */
1: ltr %r3,%r3 /* check if tz is NULL */
@@ -90,9 +92,11 @@ __kernel_gettimeofday:
st %r0,4(%r2) /* store tv->tv_usec */
10: slr %r2,%r2
ahi %r15,16
+ CFI_ADJUST_CFA_OFFSET -16
+ CFI_RESTORE 15
br %r14
+ CFI_ENDPROC
11: .long 1000000000
12: .long 274877907
13: .long _vdso_data - 0b
- .cfi_endproc
.size __kernel_gettimeofday,.-__kernel_gettimeofday
diff --git a/arch/s390/kernel/vdso64/clock_getres.S b/arch/s390/kernel/vdso64/clock_getres.S
index 5b0d9c380de2..081435398e0a 100644
--- a/arch/s390/kernel/vdso64/clock_getres.S
+++ b/arch/s390/kernel/vdso64/clock_getres.S
@@ -16,7 +16,7 @@
.globl __kernel_clock_getres
.type __kernel_clock_getres,@function
__kernel_clock_getres:
- .cfi_startproc
+ CFI_STARTPROC
larl %r1,4f
cghi %r2,__CLOCK_REALTIME_COARSE
je 0f
@@ -44,7 +44,7 @@ __kernel_clock_getres:
2: lghi %r1,__NR_clock_getres /* fallback to svc */
svc 0
br %r14
+ CFI_ENDPROC
3: .quad __CLOCK_REALTIME_RES
4: .quad __CLOCK_COARSE_RES
- .cfi_endproc
.size __kernel_clock_getres,.-__kernel_clock_getres
diff --git a/arch/s390/kernel/vdso64/clock_gettime.S b/arch/s390/kernel/vdso64/clock_gettime.S
index deccd793b279..fac3ab5ec83a 100644
--- a/arch/s390/kernel/vdso64/clock_gettime.S
+++ b/arch/s390/kernel/vdso64/clock_gettime.S
@@ -16,8 +16,10 @@
.globl __kernel_clock_gettime
.type __kernel_clock_gettime,@function
__kernel_clock_gettime:
- .cfi_startproc
+ CFI_STARTPROC
aghi %r15,-16
+ CFI_DEF_CFA_OFFSET 176
+ CFI_VAL_OFFSET 15, -160
larl %r5,_vdso_data
cghi %r2,__CLOCK_REALTIME_COARSE
je 4f
@@ -54,9 +56,13 @@ __kernel_clock_gettime:
stg %r1,8(%r3) /* store tp->tv_nsec */
lghi %r2,0
aghi %r15,16
+ CFI_DEF_CFA_OFFSET 160
+ CFI_RESTORE 15
br %r14
/* CLOCK_MONOTONIC_COARSE */
+ CFI_DEF_CFA_OFFSET 176
+ CFI_VAL_OFFSET 15, -160
3: lg %r4,__VDSO_UPD_COUNT(%r5) /* load update counter */
tmll %r4,0x0001 /* pending update ? loop */
jnz 3b
@@ -109,9 +115,13 @@ __kernel_clock_gettime:
stg %r1,8(%r3) /* store tp->tv_nsec */
lghi %r2,0
aghi %r15,16
+ CFI_DEF_CFA_OFFSET 160
+ CFI_RESTORE 15
br %r14
/* CPUCLOCK_VIRT for this thread */
+ CFI_DEF_CFA_OFFSET 176
+ CFI_VAL_OFFSET 15, -160
9: lghi %r4,0
icm %r0,15,__VDSO_ECTG_OK(%r5)
jz 12f
@@ -132,15 +142,21 @@ __kernel_clock_gettime:
stg %r4,8(%r3)
lghi %r2,0
aghi %r15,16
+ CFI_DEF_CFA_OFFSET 160
+ CFI_RESTORE 15
br %r14
/* Fallback to system call */
+ CFI_DEF_CFA_OFFSET 176
+ CFI_VAL_OFFSET 15, -160
12: lghi %r1,__NR_clock_gettime
svc 0
aghi %r15,16
+ CFI_DEF_CFA_OFFSET 160
+ CFI_RESTORE 15
br %r14
+ CFI_ENDPROC
13: .quad 1000000000
14: .quad 19342813113834067
- .cfi_endproc
.size __kernel_clock_gettime,.-__kernel_clock_gettime
diff --git a/arch/s390/kernel/vdso64/getcpu.S b/arch/s390/kernel/vdso64/getcpu.S
index 022acdecd5b9..2446e9dac8ab 100644
--- a/arch/s390/kernel/vdso64/getcpu.S
+++ b/arch/s390/kernel/vdso64/getcpu.S
@@ -15,7 +15,7 @@
.globl __kernel_getcpu
.type __kernel_getcpu,@function
__kernel_getcpu:
- .cfi_startproc
+ CFI_STARTPROC
la %r4,0
sacf 256
l %r5,__VDSO_CPU_NR(%r4)
@@ -29,5 +29,5 @@ __kernel_getcpu:
st %r4,0(%r3)
3: lghi %r2,0
br %r14
- .cfi_endproc
+ CFI_ENDPROC
.size __kernel_getcpu,.-__kernel_getcpu
diff --git a/arch/s390/kernel/vdso64/gettimeofday.S b/arch/s390/kernel/vdso64/gettimeofday.S
index 964afb1de06d..6e1f0b421695 100644
--- a/arch/s390/kernel/vdso64/gettimeofday.S
+++ b/arch/s390/kernel/vdso64/gettimeofday.S
@@ -16,8 +16,10 @@
.globl __kernel_gettimeofday
.type __kernel_gettimeofday,@function
__kernel_gettimeofday:
- .cfi_startproc
+ CFI_STARTPROC
aghi %r15,-16
+ CFI_ADJUST_CFA_OFFSET 16
+ CFI_VAL_OFFSET 15, -160
larl %r5,_vdso_data
0: ltgr %r3,%r3 /* check if tz is NULL */
je 1f
@@ -59,8 +61,10 @@ __kernel_gettimeofday:
stg %r0,8(%r2) /* store tv->tv_usec */
4: lghi %r2,0
aghi %r15,16
+ CFI_ADJUST_CFA_OFFSET -16
+ CFI_RESTORE 15
br %r14
+ CFI_ENDPROC
5: .quad 1000000000
.long 274877907
- .cfi_endproc
.size __kernel_gettimeofday,.-__kernel_gettimeofday
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