semaphores: fix missed wakes from ABA bug in waiter count logic

[musl] / arch / i386 / reloc.h

diff --git a/arch/i386/reloc.h b/arch/i386/reloc.h
index b52ef40..032f454 100644 (file)
--- a/arch/i386/reloc.h
+++ b/arch/i386/reloc.h
@@ -14,3 +14,10 @@
 
 #define CRTJMP(pc,sp) __asm__ __volatile__( \
        "mov %1,%%esp ; jmp *%0" : : "r"(pc), "r"(sp) : "memory" )
+
+#define GETFUNCSYM(fp, sym, got) __asm__ ( \
+       ".hidden " #sym "\n" \
+       "       call 1f\n" \
+       "1:     addl $" #sym "-.,(%%esp)\n" \
+       "       pop %0" \
+       : "=r"(*fp) : : "memory" )