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- #include <sysdep.h>
- #include <stdarg.h>
- #include <stdint.h>
- #include <ucontext.h>
- void
- __makecontext (ucontext_t *ucp, void (*func) (void), int argc, ...)
- {
- extern void __start_context (void);
- unsigned long int *sp;
- va_list ap;
- int i;
- sp = (unsigned long int *) (ucp->uc_stack.ss_sp + ucp->uc_stack.ss_size);
- sp -= 16 + 7 + argc;
- sp = (unsigned long int *) (((uintptr_t) sp) & ~(8 - 1));
- for (i = 0; i < 8; i++)
- sp[i + 8] = ucp->uc_mcontext.gregs[REG_O0 + i];
-
- sp[16] = (unsigned long int) ucp->uc_link;
- va_start (ap, argc);
-
- for (i = 0; i < argc; i++)
- {
- unsigned long int arg = va_arg (ap, unsigned long int);
- if (i < 6)
- ucp->uc_mcontext.gregs[REG_O0 + i] = arg;
- else
- sp[i + 23 - 6] = arg;
- }
- va_end (ap);
- ucp->uc_mcontext.gregs[REG_O6] = (unsigned long int) sp;
- ucp->uc_mcontext.gregs[REG_O7] = ((unsigned long int) __start_context) - 8;
- ucp->uc_mcontext.gregs[REG_PC] = (unsigned long int) func;
- ucp->uc_mcontext.gregs[REG_nPC] = ucp->uc_mcontext.gregs[REG_PC] + 4;
- }
- weak_alias (__makecontext, makecontext)
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