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| author | Marcus Shawcroft <marcus.shawcroft@arm.com> | 2014-04-15 17:46:07 +0100 |
|---|---|---|
| committer | Marcus Shawcroft <marcus.shawcroft@arm.com> | 2014-04-15 17:46:07 +0100 |
| commit | fa85fb9a1bf35209a149d07ebefb2a8970e4a27a (patch) | |
| tree | 4e4455bee3ca3273be5aee30927d9e59ede303ab /ld | |
| parent | 35e5d2f0f81d97f9bd41586b1979345072b7989d (diff) | |
| download | gdb-fa85fb9a1bf35209a149d07ebefb2a8970e4a27a.zip gdb-fa85fb9a1bf35209a149d07ebefb2a8970e4a27a.tar.gz gdb-fa85fb9a1bf35209a149d07ebefb2a8970e4a27a.tar.bz2 | |
[AArch64] Fix off by one error in instruction relaxation mask.
The AArch64 TLSDESC to IE relaxation code uses a bit mask intended to
ensure that destination register in a relaxed ldr instruction is
always X0. The mask has an off by one error resulting in the most
significant bit of the destination register being retained in the
relaxed instruction. The issue generally appears when the compiler
emits TLS accesses code under high register pressure resulting in a
broken code sequence.
Diffstat (limited to 'ld')
| -rw-r--r-- | ld/testsuite/ChangeLog | 5 | ||||
| -rw-r--r-- | ld/testsuite/ld-aarch64/tls-relax-gdesc-ie.s | 2 |
2 files changed, 6 insertions, 1 deletions
diff --git a/ld/testsuite/ChangeLog b/ld/testsuite/ChangeLog index e239ce8..ae0fa89 100644 --- a/ld/testsuite/ChangeLog +++ b/ld/testsuite/ChangeLog @@ -1,3 +1,8 @@ +2014-04-15 Marcus Shawcroft <marcus.shawcroft@arm.com> + + * ld-aarch64/tls-relax-gdesc-ie.s (var): Adjust test case + to include all 5 bits of LDR destination register. + 2014-04-10 Senthil Kumar Selvaraj <senthil_kumar.selvaraj@atmel.com> * ld-avr/norelax_diff.d: New testcase. diff --git a/ld/testsuite/ld-aarch64/tls-relax-gdesc-ie.s b/ld/testsuite/ld-aarch64/tls-relax-gdesc-ie.s index c20690c..38b3721 100644 --- a/ld/testsuite/ld-aarch64/tls-relax-gdesc-ie.s +++ b/ld/testsuite/ld-aarch64/tls-relax-gdesc-ie.s @@ -4,7 +4,7 @@ var: .word 2 .text adrp x0, :tlsdesc:var - ldr x1, [x0, #:tlsdesc_lo12:var] + ldr x17, [x0, #:tlsdesc_lo12:var] add x0, x0, :tlsdesc_lo12:var .tlsdesccall var blr x1 |