source of x86 swapcontext() ?

[Leszek Koltunski]

Hello glibc gurus,

I am trying to find sources of the swapcontext() function, version x86.
Now,

utumno:~/glibc-2.3.2$ find . -name "*.c" -exec grep -H swapcontext {} \;
./sysdeps/generic/swapcontext.c:swapcontext (oucp, ucp)
./sysdeps/generic/swapcontext.c:stub_warning (swapcontext)
./sysdeps/unix/sysv/linux/ia64/swapcontext.c:__swapcontext (ucontext_t 
*oucp, const ucontext_t *ucp)
./sysdeps/unix/sysv/linux/ia64/swapcontext.c:weak_alias (__swapcontext, 
swapcontext)
./sysdeps/unix/sysv/linux/sparc/sparc64/swapcontext.c:__swapcontext 
(ucontext_t *oucp, const ucontext_t *ucp)
./sysdeps/unix/sysv/linux/sparc/sparc64/swapcontext.c:  extern void 
__swapcontext_ret (void);
./sysdeps/unix/sysv/linux/sparc/sparc64/swapcontext.c: 
oucp->uc_mcontext.mc_gregs[MC_PC] = (long) __swapcontext_ret;
./sysdeps/unix/sysv/linux/sparc/sparc64/swapcontext.c: 
oucp->uc_mcontext.mc_gregs[MC_NPC] = ((long) __swapcontext_ret) + 4;
./sysdeps/unix/sysv/linux/sparc/sparc64/swapcontext.c:  .type 
__swapcontext_ret, #function            \n\
./sysdeps/unix/sysv/linux/sparc/sparc64/swapcontext.c:__swapcontext_ret: 
\n\
./sysdeps/unix/sysv/linux/sparc/sparc64/swapcontext.c:  .size 
__swapcontext_ret, .-__swapcontext_ret  \n\
./sysdeps/unix/sysv/linux/sparc/sparc64/swapcontext.c:weak_alias 
(__swapcontext, swapcontext)
./manual/examples/swapcontext.c:          swapcontext (&uc[n], &uc[3 - 
n]);
./manual/examples/swapcontext.c:  swapcontext (&uc[0], &uc[1]);
./stdlib/tst-setcontext.c:  if (swapcontext (&ctx[1], &ctx[2]) != 0)
./stdlib/tst-setcontext.c:      printf ("%s: swapcontext: %m\n", 
__FUNCTION__);
./stdlib/tst-setcontext.c:  if (swapcontext (&ctx[2], &ctx[1]) != 0)
./stdlib/tst-setcontext.c:      printf ("%s: swapcontext: %m\n", 
__FUNCTION__);
./stdlib/tst-setcontext.c:  if (swapcontext (&ctx[0], &ctx[2]) != 0)
./stdlib/tst-setcontext.c:      printf ("%s: swapcontext: %m\n", 
__FUNCTION__);

results in a few hits, but:

1) stuff from /sysdeps/generic/swapcontext.c is just a stub,
2) I assume that stuff from /sysdeps/unix/sysv/linux/ia64/swapcontext.c 
and /sysdeps/unix/sysv/linux/sparc/sparc64/swapcontext.c is related to 
ia64 and sparc64 architectures
3) finally, /manual/examples/swapcontext.c and /stdlib/tst-setcontext.c 
are examples.


The question: where can I find that function?

Please CC me in your answers as i am not subscribed to the list.

Leszek Koltunski