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m68k: fixups for makecontext

pull/21/head
Ariadne Conill 2020-12-06 01:37:12 -06:00
parent 22520be2de
commit 5f6135c0f9
1 changed files with 6 additions and 1 deletions
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7
arch/m68k/makecontext.c
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@ -32,12 +32,14 @@ __makecontext(ucontext_t *ucp, void (*func)(void), int argc, ...)
/* set up and align the stack. */
sp = (greg_t *) ((uintptr_t) ucp->uc_stack.ss_sp + ucp->uc_stack.ss_size);
sp -= (argc + 1);
sp -= (argc + 2);
sp = (greg_t *) (((uintptr_t) sp & ~0x3));
/* set up the ucontext structure */
ucp->uc_mcontext.gregs[REG_SP] = (greg_t) sp;
ucp->uc_mcontext.gregs[REG_A6] = 0;
ucp->uc_mcontext.gregs[REG_D7] = argc;
ucp->uc_mcontext.gregs[REG_PC] = (greg_t) func;
/* return address */
*sp++ = (greg_t) __start_context;
@ -49,6 +51,9 @@ __makecontext(ucontext_t *ucp, void (*func)(void), int argc, ...)
*sp++ = va_arg (va, greg_t);
va_end(va);
/* link pointer */
*sp++ = (greg_t) ucp->uc_link;
}