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| author | David S. Miller <davem@davemloft.net> | 2018-10-22 08:36:17 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-10-23 02:09:27 +0300 |
| commit | ecd4c19f3df7f3687867a2183934efb54a7d3c14 (patch) | |
| tree | 226bf19f76f3af813d5805bc53ddf1cf027b1a7f /arch/sparc/vdso | |
| parent | 3c2b2d9408b11022614bf656ae56c8fc12001ecc (diff) | |
| download | linux-ecd4c19f3df7f3687867a2183934efb54a7d3c14.tar.xz | |
sparc: Validate VDSO for undefined symbols.
There should be no undefined symbols in the resulting VDSO image(s).
On sparc, fixed register usage can result in undefined symbols ending
up in the image. To combat this, we do two things:
1) Define current_thread_info() specially when BUILD_DSO.
2) Ignore "#scratch" register undefined symbols in the output.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc/vdso')
| -rw-r--r-- | arch/sparc/vdso/Makefile | 3 | ||||
| -rw-r--r-- | arch/sparc/vdso/checkundef.sh | 10 |
2 files changed, 12 insertions, 1 deletions
diff --git a/arch/sparc/vdso/Makefile b/arch/sparc/vdso/Makefile index a9e3a4f633a7..a6e18ca4cc18 100644 --- a/arch/sparc/vdso/Makefile +++ b/arch/sparc/vdso/Makefile @@ -111,7 +111,8 @@ $(obj)/vdso32.so.dbg: FORCE \ quiet_cmd_vdso = VDSO $@ cmd_vdso = $(LD) -nostdlib -o $@ \ $(VDSO_LDFLAGS) $(VDSO_LDFLAGS_$(filter %.lds,$(^F))) \ - -T $(filter %.lds,$^) $(filter %.o,$^) + -T $(filter %.lds,$^) $(filter %.o,$^) && \ + sh $(srctree)/$(src)/checkundef.sh '$(OBJDUMP)' '$@' VDSO_LDFLAGS = -shared $(call ld-option, --hash-style=both) \ $(call ld-option, --build-id) -Bsymbolic diff --git a/arch/sparc/vdso/checkundef.sh b/arch/sparc/vdso/checkundef.sh new file mode 100644 index 000000000000..2d85876ffc32 --- /dev/null +++ b/arch/sparc/vdso/checkundef.sh @@ -0,0 +1,10 @@ +#!/bin/sh +objdump="$1" +file="$2" +$objdump -t "$file" | grep '*UUND*' | grep -v '#scratch' > /dev/null 2>&1 +if [ $? -eq 1 ]; then + exit 0 +else + echo "$file: undefined symbols found" >&2 + exit 1 +fi |