diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2023-10-23 14:19:11 -1000 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2023-10-23 14:19:11 -1000 |
| commit | 84186fcb834ecc55604efaf383e17e6b5e9baa50 (patch) | |
| tree | 01043ed69e366fdaf0f83933f261b99b0035f0a1 | |
| parent | e017769f4ce20dc0d3fa3220d4d359dcc4431274 (diff) | |
| parent | 921992229b1f06df6b649860e4a5f3def1489866 (diff) | |
Merge tag 'urgent/nolibc.2023.10.16a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu
Pull nolibc fixes from Paul McKenney:
- tools/nolibc: i386: Fix a stack misalign bug on _start
- MAINTAINERS: nolibc: update tree location
- tools/nolibc: mark start_c as weak to avoid linker errors
* tag 'urgent/nolibc.2023.10.16a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu:
tools/nolibc: mark start_c as weak
MAINTAINERS: nolibc: update tree location
tools/nolibc: i386: Fix a stack misalign bug on _start
| -rw-r--r-- | MAINTAINERS | 2 | ||||
| -rw-r--r-- | tools/include/nolibc/arch-i386.h | 4 | ||||
| -rw-r--r-- | tools/include/nolibc/crt.h | 1 |
3 files changed, 5 insertions, 2 deletions
diff --git a/MAINTAINERS b/MAINTAINERS index 2894f0777537..2c42d0ee4435 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -15131,7 +15131,7 @@ NOLIBC HEADER FILE M: Willy Tarreau <w@1wt.eu> M: Thomas Weißschuh <linux@weissschuh.net> S: Maintained -T: git git://git.kernel.org/pub/scm/linux/kernel/git/wtarreau/nolibc.git +T: git git://git.kernel.org/pub/scm/linux/kernel/git/nolibc/linux-nolibc.git F: tools/include/nolibc/ F: tools/testing/selftests/nolibc/ diff --git a/tools/include/nolibc/arch-i386.h b/tools/include/nolibc/arch-i386.h index 64415b9fac77..28c26a00a762 100644 --- a/tools/include/nolibc/arch-i386.h +++ b/tools/include/nolibc/arch-i386.h @@ -167,7 +167,9 @@ void __attribute__((weak, noreturn, optimize("Os", "omit-frame-pointer"))) __no_ __asm__ volatile ( "xor %ebp, %ebp\n" /* zero the stack frame */ "mov %esp, %eax\n" /* save stack pointer to %eax, as arg1 of _start_c */ - "and $-16, %esp\n" /* last pushed argument must be 16-byte aligned */ + "add $12, %esp\n" /* avoid over-estimating after the 'and' & 'sub' below */ + "and $-16, %esp\n" /* the %esp must be 16-byte aligned on 'call' */ + "sub $12, %esp\n" /* sub 12 to keep it aligned after the push %eax */ "push %eax\n" /* push arg1 on stack to support plain stack modes too */ "call _start_c\n" /* transfer to c runtime */ "hlt\n" /* ensure it does not return */ diff --git a/tools/include/nolibc/crt.h b/tools/include/nolibc/crt.h index a5f33fef1672..a05655b4ce1d 100644 --- a/tools/include/nolibc/crt.h +++ b/tools/include/nolibc/crt.h @@ -13,6 +13,7 @@ const unsigned long *_auxv __attribute__((weak)); static void __stack_chk_init(void); static void exit(int); +__attribute__((weak)) void _start_c(long *sp) { long argc; |