Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
tools/nolibc: MIPS: drop manual stack pointer alignment
The stack pointer is already aligned by the kernel to a multiple of 16.
All modifications of the register have been removed from the entrypoint,
so the manual realignment is unnecessary.
Drop the manual alignment.
Suggested-by: Maciej W. Rozycki <macro@orcam.me.uk>
Link: https://lore.kernel.org/lkml/alpine.DEB.2.21.2502161523290.65342@angie.orcam.me.uk/
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Tested-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
Link: https://lore.kernel.org/r/20250623-nolibc-mips-n32-v3-2-6ae2d89f4259@weissschuh.net
-2
-2
tools/include/nolibc/arch-mips.h
-2
tools/include/nolibc/arch-mips.h
···
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".set push\n"
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".set noreorder\n"
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"move $a0, $sp\n" /* save stack pointer to $a0, as arg1 of _start_c */
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-
"li $t0, -8\n"
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"and $sp, $sp, $t0\n" /* $sp must be 8-byte aligned */
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"addiu $sp, $sp, -16\n" /* the callee expects to save a0..a3 there */
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"lui $t9, %hi(_start_c)\n" /* ABI requires current function address in $t9 */
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"ori $t9, %lo(_start_c)\n"