Hi all,
I'm trying to solve some platform related problems on s390 and ppc64.
I think that I could isolate the problems I have to the platform
switch code which is the following file for the x86_unix case:
Stackless/platf/switch_x86_unix.h
I don't understand what exactly the following code does or why this
#ifdef is needed for the stackless case?
static int
slp_switch(void)
{
register int *stackref, stsizediff;
#if STACKLESS_FRHACK
__asm__ volatile ("" : : : "esi", "edi");
#else
__asm__ volatile ("" : : : "ebx", "esi", "edi");
#endif
__asm__ ("movl %%esp, %0" : "=g" (stackref));
{
SLP_SAVE_STATE(stackref, stsizediff);
__asm__ volatile (
"addl %0, %%esp\n"
"addl %0, %%ebp\n"
:
: "r" (stsizediff)
);
SLP_RESTORE_STATE();
return 0;
}
#if STACKLESS_FRHACK
__asm__ volatile ("" : : : "esi", "edi");
#else
__asm__ volatile ("" : : : "ebx", "esi", "edi");
#endif
}
These #ifdefs don't exist for the s390 and ppc case and therefore I
thought that it might be root cause for the problems I'm facing with.
It would be great if someone on the list could explain this function
such that I could transform it to the s390 and ppc case.
Thanks for your help.
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