# include "gc←private.h"
# include <stdio.h>
# include <setjmp.h>
# ifdef OS2
# define ←setjmp(b) setjmp(b)
# define ←longjmp(b,v) longjmp(b,v)
# endif
/* Routine to mark from registers that are preserved by the C compiler. */
/* This must be ported to every new architecture. There is a generic */
/* version at the end, that is likely, but not guaranteed to work */
/* on your architecture. Run the test←setjmp program to see whether */
/* there is any chance it will work. */
GC←mark←regs()
{
# ifdef RT
register long TMP←SP; /* must be bound to r11 */
# endif
# ifdef VAX
/* VAX - generic code below does not work under 4.2 */
/* r1 through r5 are caller save, and therefore */
/* on the stack or dead. */
asm("pushl r11"); asm("calls $1,←GC←tl←mark");
asm("pushl r10"); asm("calls $1,←GC←tl←mark");
asm("pushl r9"); asm("calls $1,←GC←tl←mark");
asm("pushl r8"); asm("calls $1,←GC←tl←mark");
asm("pushl r7"); asm("calls $1,←GC←tl←mark");
asm("pushl r6"); asm("calls $1,←GC←tl←mark");
# endif
# if defined(M68K) && defined(SUNOS)
/* M68K SUNOS - could be replaced by generic code */
/* a0, a1 and d1 are caller save */
/* and therefore are on stack or dead. */
asm("subqw #0x4,sp"); /* allocate word on top of stack */
asm("movl a2,sp@"); asm("jbsr ←GC←tl←mark");
asm("movl a3,sp@"); asm("jbsr ←GC←tl←mark");
asm("movl a4,sp@"); asm("jbsr ←GC←tl←mark");
asm("movl a5,sp@"); asm("jbsr ←GC←tl←mark");
/* Skip frame pointer and stack pointer */
asm("movl d1,sp@"); asm("jbsr ←GC←tl←mark");
asm("movl d2,sp@"); asm("jbsr ←GC←tl←mark");
asm("movl d3,sp@"); asm("jbsr ←GC←tl←mark");
asm("movl d4,sp@"); asm("jbsr ←GC←tl←mark");
asm("movl d5,sp@"); asm("jbsr ←GC←tl←mark");
asm("movl d6,sp@"); asm("jbsr ←GC←tl←mark");
asm("movl d7,sp@"); asm("jbsr ←GC←tl←mark");
asm("addqw #0x4,sp"); /* put stack back where it was */
# endif
# if defined(M68K) && defined(HP)
/* M68K HP - could be replaced by generic code */
/* a0, a1 and d1 are caller save. */
asm("subq.w &0x4,%sp"); /* allocate word on top of stack */
asm("mov.l %a2,(%sp)"); asm("jsr ←GC←tl←mark");
asm("mov.l %a3,(%sp)"); asm("jsr ←GC←tl←mark");
asm("mov.l %a4,(%sp)"); asm("jsr ←GC←tl←mark");
asm("mov.l %a5,(%sp)"); asm("jsr ←GC←tl←mark");
/* Skip frame pointer and stack pointer */
asm("mov.l %d1,(%sp)"); asm("jsr ←GC←tl←mark");
asm("mov.l %d2,(%sp)"); asm("jsr ←GC←tl←mark");
asm("mov.l %d3,(%sp)"); asm("jsr ←GC←tl←mark");
asm("mov.l %d4,(%sp)"); asm("jsr ←GC←tl←mark");
asm("mov.l %d5,(%sp)"); asm("jsr ←GC←tl←mark");
asm("mov.l %d6,(%sp)"); asm("jsr ←GC←tl←mark");
asm("mov.l %d7,(%sp)"); asm("jsr ←GC←tl←mark");
asm("addq.w &0x4,%sp"); /* put stack back where it was */
# endif /* M68K HP */
# if defined(I386) && !defined(OS2) && !defined(SUNOS5)
/* I386 code, generic code does not appear to work */
/* It does appear to work under OS2, and asms dont */
asm("pushl %eax"); asm("call ←GC←tl←mark"); asm("addl $4,%esp");
asm("pushl %ecx"); asm("call ←GC←tl←mark"); asm("addl $4,%esp");
asm("pushl %edx"); asm("call ←GC←tl←mark"); asm("addl $4,%esp");
asm("pushl %esi"); asm("call ←GC←tl←mark"); asm("addl $4,%esp");
asm("pushl %edi"); asm("call ←GC←tl←mark"); asm("addl $4,%esp");
asm("pushl %ebx"); asm("call ←GC←tl←mark"); asm("addl $4,%esp");
# endif
# if defined(I386) && defined(SUNOS5)
/* I386 code, generic code does not appear to work */
/* It does appear to work under OS2, and asms dont */
asm("pushl %eax"); asm("call GC←tl←mark"); asm("addl $4,%esp");
asm("pushl %ecx"); asm("call GC←tl←mark"); asm("addl $4,%esp");
asm("pushl %edx"); asm("call GC←tl←mark"); asm("addl $4,%esp");
asm("pushl %esi"); asm("call GC←tl←mark"); asm("addl $4,%esp");
asm("pushl %edi"); asm("call GC←tl←mark"); asm("addl $4,%esp");
asm("pushl %ebx"); asm("call GC←tl←mark"); asm("addl $4,%esp");
# endif
# ifdef NS32K
asm ("movd r3, tos"); asm ("bsr ?←GC←tl←mark"); asm ("adjspb $-4");
asm ("movd r4, tos"); asm ("bsr ?←GC←tl←mark"); asm ("adjspb $-4");
asm ("movd r5, tos"); asm ("bsr ?←GC←tl←mark"); asm ("adjspb $-4");
asm ("movd r6, tos"); asm ("bsr ?←GC←tl←mark"); asm ("adjspb $-4");
asm ("movd r7, tos"); asm ("bsr ?←GC←tl←mark"); asm ("adjspb $-4");
# endif
# ifdef SPARC
/* generic code will not work */
GC←save←regs←in←stack();
# endif
# ifdef RT
GC←tl←mark(TMP←SP); /* GC←tl←mark from r11 */
asm("cas r11, r6, r0"); GC←tl←mark(TMP←SP); /* r6 */
asm("cas r11, r7, r0"); GC←tl←mark(TMP←SP); /* through */
asm("cas r11, r8, r0"); GC←tl←mark(TMP←SP); /* r10 */
asm("cas r11, r9, r0"); GC←tl←mark(TMP←SP);
asm("cas r11, r10, r0"); GC←tl←mark(TMP←SP);
asm("cas r11, r12, r0"); GC←tl←mark(TMP←SP); /* r12 */
asm("cas r11, r13, r0"); GC←tl←mark(TMP←SP); /* through */
asm("cas r11, r14, r0"); GC←tl←mark(TMP←SP); /* r15 */
asm("cas r11, r15, r0"); GC←tl←mark(TMP←SP);
# endif
# if defined(M68K) && defined(SYSV)
/* Once again similar to SUN and HP, though setjmp appears to work.
--Parag
*/
# ifdef ←←GNUC←←
asm("subqw #0x4,%sp"); /* allocate word on top of stack */
asm("movl %a2,%sp@"); asm("jbsr GC←tl←mark");
asm("movl %a3,%sp@"); asm("jbsr GC←tl←mark");
asm("movl %a4,%sp@"); asm("jbsr GC←tl←mark");
asm("movl %a5,%sp@"); asm("jbsr GC←tl←mark");
/* Skip frame pointer and stack pointer */
asm("movl %d1,%sp@"); asm("jbsr GC←tl←mark");
asm("movl %d2,%sp@"); asm("jbsr GC←tl←mark");
asm("movl %d3,%sp@"); asm("jbsr GC←tl←mark");
asm("movl %d4,%sp@"); asm("jbsr GC←tl←mark");
asm("movl %d5,%sp@"); asm("jbsr GC←tl←mark");
asm("movl %d6,%sp@"); asm("jbsr GC←tl←mark");
asm("movl %d7,%sp@"); asm("jbsr GC←tl←mark");
asm("addqw #0x4,%sp"); /* put stack back where it was */
# else /* !←←GNUC←←*/
asm("subq.w &0x4,%sp"); /* allocate word on top of stack */
asm("mov.l %a2,(%sp)"); asm("jsr GC←tl←mark");
asm("mov.l %a3,(%sp)"); asm("jsr GC←tl←mark");
asm("mov.l %a4,(%sp)"); asm("jsr GC←tl←mark");
asm("mov.l %a5,(%sp)"); asm("jsr GC←tl←mark");
/* Skip frame pointer and stack pointer */
asm("mov.l %d1,(%sp)"); asm("jsr GC←tl←mark");
asm("mov.l %d2,(%sp)"); asm("jsr GC←tl←mark");
asm("mov.l %d3,(%sp)"); asm("jsr GC←tl←mark");
asm("mov.l %d4,(%sp)"); asm("jsr GC←tl←mark");
asm("mov.l %d5,(%sp)"); asm("jsr GC←tl←mark");
asm("mov.l %d6,(%sp)"); asm("jsr GC←tl←mark");
asm("mov.l %d7,(%sp)"); asm("jsr GC←tl←mark");
asm("addq.w &0x4,%sp"); /* put stack back where it was */
# endif /* !←←GNUC←← */
# endif /* M68K/SYSV */
# if defined(HP←PA) || (defined(I386) && defined(OS2))
/* Generic code */
/* The idea is due to Parag Patel at HP. */
/* We're not sure whether he would like */
/* to be he acknowledged for it or not. */
{
jmp←buf regs;
register word * i = (word *) regs;
register ptr←t lim = (ptr←t)(regs) + (sizeof regs);
/* Setjmp on Sun 3s doesn't clear all of the buffer. */
/* That tends to preserve garbage. Clear it. */
for (; (char *)i < lim; i++) {
*i = 0;
}
(void) ←setjmp(regs);
GC←mark←all←stack((ptr←t)regs, lim);
}
# endif
/* other machines... */
# if !(defined M68K) && !(defined VAX) && !(defined RT)
# if !(defined SPARC) && !(defined I386) &&!(defined NS32K)
# if !defined(HP←PA)
--> bad news <--
# endif
# endif
# endif
}
/* On register window machines, we need a way to force registers into */
/* the stack. */
# ifdef SPARC
asm(" .seg \"text\"");
# ifdef SUNOS5
asm(" .globl GC←save←regs←in←stack");
asm("GC←save←regs←in←stack:");
# else
asm(" .globl ←GC←save←regs←in←stack");
asm("←GC←save←regs←in←stack:");
# endif
asm(" ta 0x3 ! ST←FLUSH←WINDOWS");
asm(" mov %sp,%o0");
asm(" retl");
asm(" nop");
# endif