6c82cf3dec
Upstream commit: 2fe2af88abd13ae5636881da2e26f461ecb7dfb5 - i386: Remove broken CAN_USE_REGISTER_ASM_EBP (bug 28771) - Update syscall lists for Linux 5.15 - powerpc: Fix unrecognized instruction errors with recent GCC - timezone: test-case for BZ #28707 - timezone: handle truncated timezones from tzcode-2021d and later (BZ #28707) - Fix subscript error with odd TZif file [BZ #28338] - AArch64: Check for SVE in ifuncs [BZ #28744] - intl/plural.y: Avoid conflicting declarations of yyerror and yylex - Linux: Fix 32-bit vDSO for clock_gettime on powerpc32 - linux: Add sparck brk implementation - Update sparc libm-test-ulps - Update hppa libm-test-ulps - riscv: align stack before calling _dl_init [BZ #28703] - riscv: align stack in clone [BZ #28702] - powerpc64[le]: Allocate extra stack frame on syscall.S - elf: Fix tst-cpu-features-cpuinfo for KVM guests on some AMD systems [BZ #28704] - nss: Use "files dns" as the default for the hosts database (bug 28700) - arm: Guard ucontext _rtld_global_ro access by SHARED, not PIC macro - mips: increase stack alignment in clone to match the ABI - mips: align stack in clone [BZ #28223]
33 lines
1.1 KiB
Diff
33 lines
1.1 KiB
Diff
commit 9de8011c328021f10588a8acb418daf5121d5f3d
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Author: Aurelien Jarno <aurelien@aurel32.net>
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Date: Tue Dec 14 22:44:35 2021 +0100
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riscv: align stack in clone [BZ #28702]
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The RISC-V ABI [1] mandates that "the stack pointer shall be aligned to
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a 128-bit boundary upon procedure entry". This as not the case in clone.
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This fixes the misc/tst-misalign-clone-internal and
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misc/tst-misalign-clone tests.
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Fixes bug 28702.
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[1] https://github.com/riscv-non-isa/riscv-elf-psabi-doc
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(cherry picked from commit d2e594d71509faf36cf851a69370db34a4f5fa65)
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diff --git a/sysdeps/unix/sysv/linux/riscv/clone.S b/sysdeps/unix/sysv/linux/riscv/clone.S
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index 12f91a20d3bb34f5..161e83c7e3786b8d 100644
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--- a/sysdeps/unix/sysv/linux/riscv/clone.S
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+++ b/sysdeps/unix/sysv/linux/riscv/clone.S
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@@ -32,6 +32,9 @@
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.text
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LEAF (__clone)
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+ /* Align stack to a 128-bit boundary as per RISC-V ABI. */
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+ andi a1,a1,ALMASK
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+
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/* Sanity check arguments. */
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beqz a0,L (invalid) /* No NULL function pointers. */
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beqz a1,L (invalid) /* No NULL stack pointers. */
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