diff options
| author | Thomas Weißschuh <linux@weissschuh.net> | 2025-06-23 23:25:36 +0200 |
|---|---|---|
| committer | Thomas Weißschuh <linux@weissschuh.net> | 2025-06-28 22:23:02 +0200 |
| commit | f1e303348d137c710cf3fbf2eadf9d273a204987 (patch) | |
| tree | 0bcc6bcdae069a88f58f94bfd6b75b5acee8c012 /tools/include | |
| parent | 01e8a6d0c39ca0da2b7c80466f55e2959faf1522 (diff) | |
tools/nolibc: MIPS: drop $gp setup
The setup of the global pointer "$gp" register was necessary when the C
entrypoint was called through "jal <symbol>".
However since commit 0daf8c86a451 ("tools/nolibc: mips: load current function to $t9")
"jalr" is used instead which does not require "$gp".
Remove the unnecessary $gp setup, simplifying the code and opening the
road for some other cleanups.
Suggested-by: Maciej W. Rozycki <macro@orcam.me.uk>
Link: https://lore.kernel.org/lkml/alpine.DEB.2.21.2502172208570.65342@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-v3-1-6ae2d89f4259@weissschuh.net
Diffstat (limited to 'tools/include')
| -rw-r--r-- | tools/include/nolibc/arch-mips.h | 6 |
1 files changed, 0 insertions, 6 deletions
diff --git a/tools/include/nolibc/arch-mips.h b/tools/include/nolibc/arch-mips.h index 753a8ed2cf69..6d023d9f1203 100644 --- a/tools/include/nolibc/arch-mips.h +++ b/tools/include/nolibc/arch-mips.h @@ -185,13 +185,7 @@ void __attribute__((weak, noreturn)) __nolibc_entrypoint __no_stack_protector __ __asm__ volatile ( ".set push\n" ".set noreorder\n" - "bal 1f\n" /* prime $ra for .cpload */ - "nop\n" - "1:\n" - ".cpload $ra\n" "move $a0, $sp\n" /* save stack pointer to $a0, as arg1 of _start_c */ - "addiu $sp, $sp, -4\n" /* space for .cprestore to store $gp */ - ".cprestore 0\n" "li $t0, -8\n" "and $sp, $sp, $t0\n" /* $sp must be 8-byte aligned */ "addiu $sp, $sp, -16\n" /* the callee expects to save a0..a3 there */ |