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fuzz: Make fork_fuzz.ld compatible with LLVM's LLD

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LLVM's linker, LLD, supports the keyword "INSERT AFTER", starting with
version 11.
However, when multiple sections are defined in the same "INSERT AFTER",
they are added in a reversed order, compared to BFD's LD.

This patch makes fork_fuzz.ld generic enough to work with both linkers.
Each section now has its own "INSERT AFTER" keyword, so proper ordering is
defined between the sections added.

Signed-off-by: Daniele Buono <dbuono@linux.vnet.ibm.com>
Message-Id: <20201105221905.1350-2-dbuono@linux.vnet.ibm.com>
Reviewed-by: Alexander Bulekov <alxndr@bu.edu>
Tested-by: Alexander Bulekov <alxndr@bu.edu>
Signed-off-by: Thomas Huth <thuth@redhat.com>
This commit is contained in:
Daniele Buono 2020-11-05 17:18:57 -05:00 committed by Thomas Huth
parent bb451d2487
commit aba378dee6
1 changed files with 11 additions and 1 deletions
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12
tests/qtest/fuzz/fork_fuzz.ld
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@ -16,6 +16,11 @@ SECTIONS
/* Lowest stack counter */ /* Lowest stack counter */
*(__sancov_lowest_stack); *(__sancov_lowest_stack);
} }
}
INSERT AFTER .data;
SECTIONS
{
.data.fuzz_ordered : .data.fuzz_ordered :
{ {
/* /*
@ -34,6 +39,11 @@ SECTIONS
*/ */
*(.bss._ZN6fuzzer3TPCE); *(.bss._ZN6fuzzer3TPCE);
} }
}
INSERT AFTER .data.fuzz_start;
SECTIONS
{
.data.fuzz_end : ALIGN(4K) .data.fuzz_end : ALIGN(4K)
{ {
__FUZZ_COUNTERS_END = .; __FUZZ_COUNTERS_END = .;
@ -43,4 +53,4 @@ SECTIONS
* Don't overwrite the SECTIONS in the default linker script. Instead insert the * Don't overwrite the SECTIONS in the default linker script. Instead insert the
* above into the default script * above into the default script
*/ */
INSERT AFTER .data; INSERT AFTER .data.fuzz_ordered;