s390: remove compat vdso code

Remove compat vdso code, since there is hardly any compat user space
left. Still existing compat user space will have to use system calls
instead.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
This commit is contained in:
Heiko Carstens 2019-11-18 13:59:25 +01:00 committed by Vasily Gorbik
parent aa137a6d30
commit 2115fbf721
13 changed files with 3 additions and 638 deletions

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@ -427,9 +427,6 @@ config COMPAT
(and some other stuff like libraries and such) is needed for (and some other stuff like libraries and such) is needed for
executing 31 bit applications. It is safe to say "Y". executing 31 bit applications. It is safe to say "Y".
config COMPAT_VDSO
def_bool COMPAT && !CC_IS_CLANG
config SYSVIPC_COMPAT config SYSVIPC_COMPAT
def_bool y if COMPAT && SYSVIPC def_bool y if COMPAT && SYSVIPC

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@ -157,7 +157,6 @@ zfcpdump:
vdso_install: vdso_install:
$(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@ $(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso64 $@
$(Q)$(MAKE) $(build)=arch/$(ARCH)/kernel/vdso32 $@
archclean: archclean:
$(Q)$(MAKE) $(clean)=$(boot) $(Q)$(MAKE) $(clean)=$(boot)

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@ -81,4 +81,3 @@ obj-$(CONFIG_TRACEPOINTS) += trace.o
# vdso # vdso
obj-y += vdso64/ obj-y += vdso64/
obj-$(CONFIG_COMPAT_VDSO) += vdso32/

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@ -29,13 +29,6 @@
#include <asm/vdso.h> #include <asm/vdso.h>
#include <asm/facility.h> #include <asm/facility.h>
#ifdef CONFIG_COMPAT_VDSO
extern char vdso32_start, vdso32_end;
static void *vdso32_kbase = &vdso32_start;
static unsigned int vdso32_pages;
static struct page **vdso32_pagelist;
#endif
extern char vdso64_start, vdso64_end; extern char vdso64_start, vdso64_end;
static void *vdso64_kbase = &vdso64_start; static void *vdso64_kbase = &vdso64_start;
static unsigned int vdso64_pages; static unsigned int vdso64_pages;
@ -55,12 +48,6 @@ static vm_fault_t vdso_fault(const struct vm_special_mapping *sm,
vdso_pagelist = vdso64_pagelist; vdso_pagelist = vdso64_pagelist;
vdso_pages = vdso64_pages; vdso_pages = vdso64_pages;
#ifdef CONFIG_COMPAT_VDSO
if (vma->vm_mm->context.compat_mm) {
vdso_pagelist = vdso32_pagelist;
vdso_pages = vdso32_pages;
}
#endif
if (vmf->pgoff >= vdso_pages) if (vmf->pgoff >= vdso_pages)
return VM_FAULT_SIGBUS; return VM_FAULT_SIGBUS;
@ -76,10 +63,6 @@ static int vdso_mremap(const struct vm_special_mapping *sm,
unsigned long vdso_pages; unsigned long vdso_pages;
vdso_pages = vdso64_pages; vdso_pages = vdso64_pages;
#ifdef CONFIG_COMPAT_VDSO
if (vma->vm_mm->context.compat_mm)
vdso_pages = vdso32_pages;
#endif
if ((vdso_pages << PAGE_SHIFT) != vma->vm_end - vma->vm_start) if ((vdso_pages << PAGE_SHIFT) != vma->vm_end - vma->vm_start)
return -EINVAL; return -EINVAL;
@ -209,12 +192,10 @@ int arch_setup_additional_pages(struct linux_binprm *bprm, int uses_interp)
if (!vdso_enabled) if (!vdso_enabled)
return 0; return 0;
if (is_compat_task())
return 0;
vdso_pages = vdso64_pages; vdso_pages = vdso64_pages;
#ifdef CONFIG_COMPAT_VDSO
mm->context.compat_mm = is_compat_task();
if (mm->context.compat_mm)
vdso_pages = vdso32_pages;
#endif
/* /*
* vDSO has a problem and was disabled, just don't "enable" it for * vDSO has a problem and was disabled, just don't "enable" it for
* the process * the process
@ -267,23 +248,6 @@ static int __init vdso_init(void)
int i; int i;
vdso_init_data(vdso_data); vdso_init_data(vdso_data);
#ifdef CONFIG_COMPAT_VDSO
/* Calculate the size of the 32 bit vDSO */
vdso32_pages = ((&vdso32_end - &vdso32_start
+ PAGE_SIZE - 1) >> PAGE_SHIFT) + 1;
/* Make sure pages are in the correct state */
vdso32_pagelist = kcalloc(vdso32_pages + 1, sizeof(struct page *),
GFP_KERNEL);
BUG_ON(vdso32_pagelist == NULL);
for (i = 0; i < vdso32_pages - 1; i++) {
struct page *pg = virt_to_page(vdso32_kbase + i*PAGE_SIZE);
get_page(pg);
vdso32_pagelist[i] = pg;
}
vdso32_pagelist[vdso32_pages - 1] = virt_to_page(vdso_data);
vdso32_pagelist[vdso32_pages] = NULL;
#endif
/* Calculate the size of the 64 bit vDSO */ /* Calculate the size of the 64 bit vDSO */
vdso64_pages = ((&vdso64_end - &vdso64_start vdso64_pages = ((&vdso64_end - &vdso64_start

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@ -1 +0,0 @@
vdso32.lds

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@ -1,66 +0,0 @@
# SPDX-License-Identifier: GPL-2.0
# List of files in the vdso, has to be asm only for now
KCOV_INSTRUMENT := n
obj-vdso32 = gettimeofday.o clock_getres.o clock_gettime.o note.o getcpu.o
# Build rules
targets := $(obj-vdso32) vdso32.so vdso32.so.dbg
obj-vdso32 := $(addprefix $(obj)/, $(obj-vdso32))
KBUILD_AFLAGS += -DBUILD_VDSO
KBUILD_CFLAGS += -DBUILD_VDSO
KBUILD_AFLAGS_31 := $(filter-out -m64,$(KBUILD_AFLAGS))
KBUILD_AFLAGS_31 += -m31 -s
KBUILD_CFLAGS_31 := $(filter-out -m64,$(KBUILD_CFLAGS))
KBUILD_CFLAGS_31 += -m31 -fPIC -shared -fno-common -fno-builtin
KBUILD_CFLAGS_31 += -nostdlib -Wl,-soname=linux-vdso32.so.1 \
-Wl,--hash-style=both
$(targets:%=$(obj)/%.dbg): KBUILD_CFLAGS = $(KBUILD_CFLAGS_31)
$(targets:%=$(obj)/%.dbg): KBUILD_AFLAGS = $(KBUILD_AFLAGS_31)
obj-y += vdso32_wrapper.o
extra-y += vdso32.lds
CPPFLAGS_vdso32.lds += -P -C -U$(ARCH)
# Disable gcov profiling, ubsan and kasan for VDSO code
GCOV_PROFILE := n
UBSAN_SANITIZE := n
KASAN_SANITIZE := n
# Force dependency (incbin is bad)
$(obj)/vdso32_wrapper.o : $(obj)/vdso32.so
# link rule for the .so file, .lds has to be first
$(obj)/vdso32.so.dbg: $(src)/vdso32.lds $(obj-vdso32) FORCE
$(call if_changed,vdso32ld)
# strip rule for the .so file
$(obj)/%.so: OBJCOPYFLAGS := -S
$(obj)/%.so: $(obj)/%.so.dbg FORCE
$(call if_changed,objcopy)
# assembly rules for the .S files
$(obj-vdso32): %.o: %.S FORCE
$(call if_changed_dep,vdso32as)
# actual build commands
quiet_cmd_vdso32ld = VDSO32L $@
cmd_vdso32ld = $(CC) $(c_flags) -Wl,-T $(filter %.lds %.o,$^) -o $@
quiet_cmd_vdso32as = VDSO32A $@
cmd_vdso32as = $(CC) $(a_flags) -c -o $@ $<
# install commands for the unstripped file
quiet_cmd_vdso_install = INSTALL $@
cmd_vdso_install = cp $(obj)/$@.dbg $(MODLIB)/vdso/$@
vdso32.so: $(obj)/vdso32.so.dbg
@mkdir -p $(MODLIB)/vdso
$(call cmd,vdso_install)
vdso_install: vdso32.so

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@ -1,44 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Userland implementation of clock_getres() for 32 bits processes in a
* s390 kernel for use in the vDSO
*
* Copyright IBM Corp. 2008
* Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
*/
#include <asm/vdso.h>
#include <asm/asm-offsets.h>
#include <asm/unistd.h>
#include <asm/dwarf.h>
.text
.align 4
.globl __kernel_clock_getres
.type __kernel_clock_getres,@function
__kernel_clock_getres:
CFI_STARTPROC
basr %r1,0
la %r1,4f-.(%r1)
chi %r2,__CLOCK_REALTIME
je 0f
chi %r2,__CLOCK_MONOTONIC
je 0f
la %r1,5f-4f(%r1)
chi %r2,__CLOCK_REALTIME_COARSE
je 0f
chi %r2,__CLOCK_MONOTONIC_COARSE
jne 3f
0: ltr %r3,%r3
jz 2f /* res == NULL */
1: l %r0,0(%r1)
xc 0(4,%r3),0(%r3) /* set tp->tv_sec to zero */
st %r0,4(%r3) /* store tp->tv_usec */
2: lhi %r2,0
br %r14
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
.size __kernel_clock_getres,.-__kernel_clock_getres

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@ -1,179 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Userland implementation of clock_gettime() for 32 bits processes in a
* s390 kernel for use in the vDSO
*
* Copyright IBM Corp. 2008
* Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
*/
#include <asm/vdso.h>
#include <asm/asm-offsets.h>
#include <asm/unistd.h>
#include <asm/dwarf.h>
#include <asm/ptrace.h>
.text
.align 4
.globl __kernel_clock_gettime
.type __kernel_clock_gettime,@function
__kernel_clock_gettime:
CFI_STARTPROC
ahi %r15,-16
CFI_DEF_CFA_OFFSET STACK_FRAME_OVERHEAD+16
CFI_VAL_OFFSET 15, -STACK_FRAME_OVERHEAD
basr %r5,0
0: al %r5,21f-0b(%r5) /* get &_vdso_data */
chi %r2,__CLOCK_REALTIME_COARSE
je 10f
chi %r2,__CLOCK_REALTIME
je 11f
chi %r2,__CLOCK_MONOTONIC_COARSE
je 9f
chi %r2,__CLOCK_MONOTONIC
jne 19f
/* CLOCK_MONOTONIC */
1: l %r4,__VDSO_UPD_COUNT+4(%r5) /* load update counter */
tml %r4,0x0001 /* pending update ? loop */
jnz 1b
stcke 0(%r15) /* Store TOD clock */
lm %r0,%r1,1(%r15)
s %r0,__VDSO_XTIME_STAMP(%r5) /* TOD - cycle_last */
sl %r1,__VDSO_XTIME_STAMP+4(%r5)
brc 3,2f
ahi %r0,-1
2: ms %r0,__VDSO_TK_MULT(%r5) /* * tk->mult */
lr %r2,%r0
l %r0,__VDSO_TK_MULT(%r5)
ltr %r1,%r1
mr %r0,%r0
jnm 3f
a %r0,__VDSO_TK_MULT(%r5)
3: alr %r0,%r2
al %r0,__VDSO_WTOM_NSEC(%r5)
al %r1,__VDSO_WTOM_NSEC+4(%r5)
brc 12,5f
ahi %r0,1
5: l %r2,__VDSO_TK_SHIFT(%r5) /* Timekeeper shift */
srdl %r0,0(%r2) /* >> tk->shift */
l %r2,__VDSO_WTOM_SEC+4(%r5)
cl %r4,__VDSO_UPD_COUNT+4(%r5) /* check update counter */
jne 1b
basr %r5,0
6: ltr %r0,%r0
jnz 7f
cl %r1,20f-6b(%r5)
jl 8f
7: ahi %r2,1
sl %r1,20f-6b(%r5)
brc 3,6b
ahi %r0,-1
j 6b
8: st %r2,0(%r3) /* store tp->tv_sec */
st %r1,4(%r3) /* store tp->tv_nsec */
lhi %r2,0
ahi %r15,16
CFI_DEF_CFA_OFFSET STACK_FRAME_OVERHEAD
CFI_RESTORE 15
br %r14
/* CLOCK_MONOTONIC_COARSE */
CFI_DEF_CFA_OFFSET STACK_FRAME_OVERHEAD+16
CFI_VAL_OFFSET 15, -STACK_FRAME_OVERHEAD
9: l %r4,__VDSO_UPD_COUNT+4(%r5) /* load update counter */
tml %r4,0x0001 /* pending update ? loop */
jnz 9b
l %r2,__VDSO_WTOM_CRS_SEC+4(%r5)
l %r1,__VDSO_WTOM_CRS_NSEC+4(%r5)
cl %r4,__VDSO_UPD_COUNT+4(%r5) /* check update counter */
jne 9b
j 8b
/* CLOCK_REALTIME_COARSE */
10: l %r4,__VDSO_UPD_COUNT+4(%r5) /* load update counter */
tml %r4,0x0001 /* pending update ? loop */
jnz 10b
l %r2,__VDSO_XTIME_CRS_SEC+4(%r5)
l %r1,__VDSO_XTIME_CRS_NSEC+4(%r5)
cl %r4,__VDSO_UPD_COUNT+4(%r5) /* check update counter */
jne 10b
j 17f
/* CLOCK_REALTIME */
11: l %r4,__VDSO_UPD_COUNT+4(%r5) /* load update counter */
tml %r4,0x0001 /* pending update ? loop */
jnz 11b
stcke 0(%r15) /* Store TOD clock */
lm %r0,%r1,__VDSO_TS_END(%r5) /* TOD steering end time */
s %r0,1(%r15) /* no - ts_steering_end */
sl %r1,5(%r15)
brc 3,22f
ahi %r0,-1
22: ltr %r0,%r0 /* past end of steering? */
jm 24f
srdl %r0,15 /* 1 per 2^16 */
tm __VDSO_TS_DIR+3(%r5),0x01 /* steering direction? */
jz 23f
lcr %r0,%r0 /* negative TOD offset */
lcr %r1,%r1
je 23f
ahi %r0,-1
23: a %r0,1(%r15) /* add TOD timestamp */
al %r1,5(%r15)
brc 12,25f
ahi %r0,1
j 25f
24: lm %r0,%r1,1(%r15) /* load TOD timestamp */
25: s %r0,__VDSO_XTIME_STAMP(%r5) /* TOD - cycle_last */
sl %r1,__VDSO_XTIME_STAMP+4(%r5)
brc 3,12f
ahi %r0,-1
12: ms %r0,__VDSO_TK_MULT(%r5) /* * tk->mult */
lr %r2,%r0
l %r0,__VDSO_TK_MULT(%r5)
ltr %r1,%r1
mr %r0,%r0
jnm 13f
a %r0,__VDSO_TK_MULT(%r5)
13: alr %r0,%r2
al %r0,__VDSO_XTIME_NSEC(%r5) /* + tk->xtime_nsec */
al %r1,__VDSO_XTIME_NSEC+4(%r5)
brc 12,14f
ahi %r0,1
14: l %r2,__VDSO_TK_SHIFT(%r5) /* Timekeeper shift */
srdl %r0,0(%r2) /* >> tk->shift */
l %r2,__VDSO_XTIME_SEC+4(%r5)
cl %r4,__VDSO_UPD_COUNT+4(%r5) /* check update counter */
jne 11b
basr %r5,0
15: ltr %r0,%r0
jnz 16f
cl %r1,20f-15b(%r5)
jl 17f
16: ahi %r2,1
sl %r1,20f-15b(%r5)
brc 3,15b
ahi %r0,-1
j 15b
17: st %r2,0(%r3) /* store tp->tv_sec */
st %r1,4(%r3) /* store tp->tv_nsec */
lhi %r2,0
ahi %r15,16
CFI_DEF_CFA_OFFSET STACK_FRAME_OVERHEAD
CFI_RESTORE 15
br %r14
/* Fallback to system call */
CFI_DEF_CFA_OFFSET STACK_FRAME_OVERHEAD+16
CFI_VAL_OFFSET 15, -STACK_FRAME_OVERHEAD
19: lhi %r1,__NR_clock_gettime
svc 0
ahi %r15,16
CFI_DEF_CFA_OFFSET STACK_FRAME_OVERHEAD
CFI_RESTORE 15
br %r14
CFI_ENDPROC
20: .long 1000000000
21: .long _vdso_data - 0b
.size __kernel_clock_gettime,.-__kernel_clock_gettime

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@ -1,31 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Userland implementation of getcpu() for 32 bits processes in a
* s390 kernel for use in the vDSO
*
* Copyright IBM Corp. 2016
* Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
*/
#include <asm/vdso.h>
#include <asm/asm-offsets.h>
#include <asm/dwarf.h>
.text
.align 4
.globl __kernel_getcpu
.type __kernel_getcpu,@function
__kernel_getcpu:
CFI_STARTPROC
sacf 256
lm %r4,%r5,__VDSO_GETCPU_VAL(%r0)
sacf 0
ltr %r2,%r2
jz 2f
st %r5,0(%r2)
2: ltr %r3,%r3
jz 3f
st %r4,0(%r3)
3: lhi %r2,0
br %r14
CFI_ENDPROC
.size __kernel_getcpu,.-__kernel_getcpu

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@ -1,103 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Userland implementation of gettimeofday() for 32 bits processes in a
* s390 kernel for use in the vDSO
*
* Copyright IBM Corp. 2008
* Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
*/
#include <asm/vdso.h>
#include <asm/asm-offsets.h>
#include <asm/unistd.h>
#include <asm/dwarf.h>
#include <asm/ptrace.h>
.text
.align 4
.globl __kernel_gettimeofday
.type __kernel_gettimeofday,@function
__kernel_gettimeofday:
CFI_STARTPROC
ahi %r15,-16
CFI_ADJUST_CFA_OFFSET 16
CFI_VAL_OFFSET 15, -STACK_FRAME_OVERHEAD
basr %r5,0
0: al %r5,13f-0b(%r5) /* get &_vdso_data */
1: ltr %r3,%r3 /* check if tz is NULL */
je 2f
mvc 0(8,%r3),__VDSO_TIMEZONE(%r5)
2: ltr %r2,%r2 /* check if tv is NULL */
je 10f
l %r4,__VDSO_UPD_COUNT+4(%r5) /* load update counter */
tml %r4,0x0001 /* pending update ? loop */
jnz 1b
stcke 0(%r15) /* Store TOD clock */
lm %r0,%r1,__VDSO_TS_END(%r5) /* TOD steering end time */
s %r0,1(%r15)
sl %r1,5(%r15)
brc 3,14f
ahi %r0,-1
14: ltr %r0,%r0 /* past end of steering? */
jm 16f
srdl %r0,15 /* 1 per 2^16 */
tm __VDSO_TS_DIR+3(%r5),0x01 /* steering direction? */
jz 15f
lcr %r0,%r0 /* negative TOD offset */
lcr %r1,%r1
je 15f
ahi %r0,-1
15: a %r0,1(%r15) /* add TOD timestamp */
al %r1,5(%r15)
brc 12,17f
ahi %r0,1
j 17f
16: lm %r0,%r1,1(%r15) /* load TOD timestamp */
17: s %r0,__VDSO_XTIME_STAMP(%r5) /* TOD - cycle_last */
sl %r1,__VDSO_XTIME_STAMP+4(%r5)
brc 3,3f
ahi %r0,-1
3: ms %r0,__VDSO_TK_MULT(%r5) /* * tk->mult */
st %r0,0(%r15)
l %r0,__VDSO_TK_MULT(%r5)
ltr %r1,%r1
mr %r0,%r0
jnm 4f
a %r0,__VDSO_TK_MULT(%r5)
4: al %r0,0(%r15)
al %r0,__VDSO_XTIME_NSEC(%r5) /* + xtime */
al %r1,__VDSO_XTIME_NSEC+4(%r5)
brc 12,5f
ahi %r0,1
5: mvc 0(4,%r15),__VDSO_XTIME_SEC+4(%r5)
cl %r4,__VDSO_UPD_COUNT+4(%r5) /* check update counter */
jne 1b
l %r4,__VDSO_TK_SHIFT(%r5) /* Timekeeper shift */
srdl %r0,0(%r4) /* >> tk->shift */
l %r4,0(%r15) /* get tv_sec from stack */
basr %r5,0
6: ltr %r0,%r0
jnz 7f
cl %r1,11f-6b(%r5)
jl 8f
7: ahi %r4,1
sl %r1,11f-6b(%r5)
brc 3,6b
ahi %r0,-1
j 6b
8: st %r4,0(%r2) /* store tv->tv_sec */
ltr %r1,%r1
m %r0,12f-6b(%r5)
jnm 9f
al %r0,12f-6b(%r5)
9: srl %r0,6
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
.size __kernel_gettimeofday,.-__kernel_gettimeofday

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@ -1,13 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* This supplies .note.* sections to go into the PT_NOTE inside the vDSO text.
* Here we can supply some information useful to userland.
*/
#include <linux/uts.h>
#include <linux/version.h>
#include <linux/elfnote.h>
ELFNOTE_START(Linux, 0, "a")
.long LINUX_VERSION_CODE
ELFNOTE_END

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@ -1,142 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* This is the infamous ld script for the 32 bits vdso
* library
*/
#include <asm/page.h>
#include <asm/vdso.h>
OUTPUT_FORMAT("elf32-s390", "elf32-s390", "elf32-s390")
OUTPUT_ARCH(s390:31-bit)
ENTRY(_start)
SECTIONS
{
. = VDSO32_LBASE + SIZEOF_HEADERS;
.hash : { *(.hash) } :text
.gnu.hash : { *(.gnu.hash) }
.dynsym : { *(.dynsym) }
.dynstr : { *(.dynstr) }
.gnu.version : { *(.gnu.version) }
.gnu.version_d : { *(.gnu.version_d) }
.gnu.version_r : { *(.gnu.version_r) }
.note : { *(.note.*) } :text :note
. = ALIGN(16);
.text : {
*(.text .stub .text.* .gnu.linkonce.t.*)
} :text
PROVIDE(__etext = .);
PROVIDE(_etext = .);
PROVIDE(etext = .);
/*
* Other stuff is appended to the text segment:
*/
.rodata : { *(.rodata .rodata.* .gnu.linkonce.r.*) }
.rodata1 : { *(.rodata1) }
.dynamic : { *(.dynamic) } :text :dynamic
.eh_frame_hdr : { *(.eh_frame_hdr) } :text :eh_frame_hdr
.eh_frame : { KEEP (*(.eh_frame)) } :text
.gcc_except_table : { *(.gcc_except_table .gcc_except_table.*) }
.rela.dyn ALIGN(8) : { *(.rela.dyn) }
.got ALIGN(8) : { *(.got .toc) }
_end = .;
PROVIDE(end = .);
/*
* Stabs debugging sections are here too.
*/
.stab 0 : { *(.stab) }
.stabstr 0 : { *(.stabstr) }
.stab.excl 0 : { *(.stab.excl) }
.stab.exclstr 0 : { *(.stab.exclstr) }
.stab.index 0 : { *(.stab.index) }
.stab.indexstr 0 : { *(.stab.indexstr) }
.comment 0 : { *(.comment) }
/*
* DWARF debug sections.
* Symbols in the DWARF debugging sections are relative to the
* beginning of the section so we begin them at 0.
*/
/* DWARF 1 */
.debug 0 : { *(.debug) }
.line 0 : { *(.line) }
/* GNU DWARF 1 extensions */
.debug_srcinfo 0 : { *(.debug_srcinfo) }
.debug_sfnames 0 : { *(.debug_sfnames) }
/* DWARF 1.1 and DWARF 2 */
.debug_aranges 0 : { *(.debug_aranges) }
.debug_pubnames 0 : { *(.debug_pubnames) }
/* DWARF 2 */
.debug_info 0 : { *(.debug_info .gnu.linkonce.wi.*) }
.debug_abbrev 0 : { *(.debug_abbrev) }
.debug_line 0 : { *(.debug_line) }
.debug_frame 0 : { *(.debug_frame) }
.debug_str 0 : { *(.debug_str) }
.debug_loc 0 : { *(.debug_loc) }
.debug_macinfo 0 : { *(.debug_macinfo) }
/* SGI/MIPS DWARF 2 extensions */
.debug_weaknames 0 : { *(.debug_weaknames) }
.debug_funcnames 0 : { *(.debug_funcnames) }
.debug_typenames 0 : { *(.debug_typenames) }
.debug_varnames 0 : { *(.debug_varnames) }
/* DWARF 3 */
.debug_pubtypes 0 : { *(.debug_pubtypes) }
.debug_ranges 0 : { *(.debug_ranges) }
.gnu.attributes 0 : { KEEP (*(.gnu.attributes)) }
. = ALIGN(PAGE_SIZE);
PROVIDE(_vdso_data = .);
/DISCARD/ : {
*(.note.GNU-stack)
*(.branch_lt)
*(.data .data.* .gnu.linkonce.d.* .sdata*)
*(.bss .sbss .dynbss .dynsbss)
}
}
/*
* Very old versions of ld do not recognize this name token; use the constant.
*/
#define PT_GNU_EH_FRAME 0x6474e550
/*
* We must supply the ELF program headers explicitly to get just one
* PT_LOAD segment, and set the flags explicitly to make segments read-only.
*/
PHDRS
{
text PT_LOAD FILEHDR PHDRS FLAGS(5); /* PF_R|PF_X */
dynamic PT_DYNAMIC FLAGS(4); /* PF_R */
note PT_NOTE FLAGS(4); /* PF_R */
eh_frame_hdr PT_GNU_EH_FRAME;
}
/*
* This controls what symbols we export from the DSO.
*/
VERSION
{
VDSO_VERSION_STRING {
global:
/*
* Has to be there for the kernel to find
*/
__kernel_gettimeofday;
__kernel_clock_gettime;
__kernel_clock_getres;
__kernel_getcpu;
local: *;
};
}

View File

@ -1,15 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0 */
#include <linux/init.h>
#include <linux/linkage.h>
#include <asm/page.h>
__PAGE_ALIGNED_DATA
.globl vdso32_start, vdso32_end
.balign PAGE_SIZE
vdso32_start:
.incbin "arch/s390/kernel/vdso32/vdso32.so"
.balign PAGE_SIZE
vdso32_end:
.previous