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| author | Aurelien Jarno <aurelien@aurel32.net> | 2021-12-14 22:44:35 +0100 |
|---|---|---|
| committer | Aurelien Jarno <aurelien@aurel32.net> | 2021-12-17 20:29:32 +0100 |
| commit | d2e594d71509faf36cf851a69370db34a4f5fa65 (patch) | |
| tree | 38899de60ef55a647615dac7419876b4acf8f68a /sysdeps/unix | |
| parent | 94058f6cde8b887178885954740ac6c866d25eab (diff) | |
| download | glibc-d2e594d71509faf36cf851a69370db34a4f5fa65.zip glibc-d2e594d71509faf36cf851a69370db34a4f5fa65.tar.gz glibc-d2e594d71509faf36cf851a69370db34a4f5fa65.tar.bz2 | |
riscv: align stack in clone [BZ #28702]
The RISC-V ABI [1] mandates that "the stack pointer shall be aligned to
a 128-bit boundary upon procedure entry". This as not the case in clone.
This fixes the misc/tst-misalign-clone-internal and
misc/tst-misalign-clone tests.
Fixes bug 28702.
[1] https://github.com/riscv-non-isa/riscv-elf-psabi-doc
Diffstat (limited to 'sysdeps/unix')
| -rw-r--r-- | sysdeps/unix/sysv/linux/riscv/clone.S | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/riscv/clone.S b/sysdeps/unix/sysv/linux/riscv/clone.S index 12f91a2..161e83c 100644 --- a/sysdeps/unix/sysv/linux/riscv/clone.S +++ b/sysdeps/unix/sysv/linux/riscv/clone.S @@ -32,6 +32,9 @@ .text LEAF (__clone) + /* Align stack to a 128-bit boundary as per RISC-V ABI. */ + andi a1,a1,ALMASK + /* Sanity check arguments. */ beqz a0,L (invalid) /* No NULL function pointers. */ beqz a1,L (invalid) /* No NULL stack pointers. */ |