OpenXM_contrib2/asir2000/gc/mach_dep.c - diff

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Diff for /OpenXM_contrib2/asir2000/gc/mach_dep.c between version 1.1 and 1.4

version 1.1, 1999/12/03 07:39:09

version 1.4, 2001/04/20 07:39:19

Line 12

* modified is included with the above copyright notice.

/* Boehm, November 17, 1995 12:13 pm PST */

# include "gc_priv.h"

# include "private/gc_priv.h"

# include <stdio.h>

# include <setjmp.h>

# if defined(OS2) || defined(CX_UX)

Line 21

# endif

# ifdef AMIGA

# ifndef __GNUC__

# include <dos/dos.h>

# include <dos.h>

# else

# include <machine/reg.h>

# endif

Line 62 asm static void PushMacRegisters()

#endif /* __MWERKS__ */

# if defined(SPARC) || defined(IA64)

/* Value returned from register flushing routine; either sp (SPARC) */

/* or ar.bsp (IA64) */

word GC_save_regs_ret_val;

# 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 */

Line 74 void GC_push_regs()

Line 80 void GC_push_regs()

# ifdef RT

# endif

# if defined(MIPS) && defined(LINUX)

/* I'm not sure whether this has actually been tested. */

# define call_push(x) asm("move $4," x ";"); asm("jal GC_push_one")

call_push("$2");

call_push("$3");

call_push("$16");

call_push("$17");

call_push("$18");

call_push("$19");

call_push("$20");

call_push("$21");

call_push("$22");

call_push("$23");

call_push("$30");

# undef call_push

# endif /* MIPS && LINUX */

# ifdef VAX

/* VAX - generic code below does not work under 4.2 */

/* r1 through r5 are caller save, and therefore */

Line 154 void GC_push_regs()

Line 178 void GC_push_regs()

# else /* !__GNUC__ */

GC_push_one(getreg(REG_A2));

GC_push_one(getreg(REG_A3));

GC_push_one(getreg(REG_A4));

# ifndef __SASC

/* Can probably be changed to #if 0 -Kjetil M. (a4=globals)*/

GC_push_one(getreg(REG_A4));

# endif

GC_push_one(getreg(REG_A5));

GC_push_one(getreg(REG_A6));

/* Skip stack pointer */

Line 193 void GC_push_regs()

Line 220 void GC_push_regs()

# endif /* __MWERKS__ */

# endif /* MACOS */

# if defined(I386) &&!defined(OS2) &&!defined(SVR4) &&!defined(MSWIN32) \

# if defined(I386) &&!defined(OS2) &&!defined(SVR4) \

&& (defined(__MINGW32__) || !defined(MSWIN32)) \

&& !defined(SCO) && !defined(SCO_ELF) \

&& !(defined(LINUX) && defined(__ELF__)) \

&& !(defined(__FreeBSD__) && defined(__ELF__)) \

&& !(defined(FREEBSD) && defined(__ELF__)) \

&& !(defined(NETBSD) && defined(__ELF__)) \

&& !(defined(OPENBSD) && defined(__ELF__)) \

&& !(defined(BEOS) && defined(__ELF__)) \

&& !defined(DOS4GW)

/* I386 code, generic code does not appear to work */

/* It does appear to work under OS2, and asms dont */

Line 211 void GC_push_regs()

Line 242 void GC_push_regs()

# endif

# if ( defined(I386) && defined(LINUX) && defined(__ELF__) ) \

|| ( defined(I386) && defined(__FreeBSD__) && defined(__ELF__) )

|| ( defined(I386) && defined(FREEBSD) && defined(__ELF__) ) \

|| ( defined(I386) && defined(NETBSD) && defined(__ELF__) ) \

|| ( defined(I386) && defined(OPENBSD) && defined(__ELF__) )

/* This is modified for Linux with ELF (Note: _ELF_ only) */

/* This section handles FreeBSD with ELF. */

asm("pushl %eax"); asm("call GC_push_one"); asm("addl $4,%esp");

/* Eax is caller-save and dead here. Other caller-save */

asm("pushl %ecx"); asm("call GC_push_one"); asm("addl $4,%esp");

/* registers could also be skipped. We assume there are no */

asm("pushl %edx"); asm("call GC_push_one"); asm("addl $4,%esp");

/* pointers in MMX registers, etc. */

asm("pushl %ebp"); asm("call GC_push_one"); asm("addl $4,%esp");

/* We combine instructions in a single asm to prevent gcc from */

asm("pushl %esi"); asm("call GC_push_one"); asm("addl $4,%esp");

/* inserting code in the middle. */

asm("pushl %edi"); asm("call GC_push_one"); asm("addl $4,%esp");

asm("pushl %ecx; call GC_push_one; addl $4,%esp");

asm("pushl %ebx"); asm("call GC_push_one"); asm("addl $4,%esp");

asm("pushl %edx; call GC_push_one; addl $4,%esp");

asm("pushl %ebp; call GC_push_one; addl $4,%esp");

asm("pushl %esi; call GC_push_one; addl $4,%esp");

asm("pushl %edi; call GC_push_one; addl $4,%esp");

asm("pushl %ebx; call GC_push_one; addl $4,%esp");

# endif

# if defined(I386) && defined(MSWIN32) && !defined(USE_GENERIC)

# if ( defined(I386) && defined(BEOS) && defined(__ELF__) )

/* As far as I can understand from */

/* http://www.beunited.org/articles/jbq/nasm.shtml, */

/* only ebp, esi, edi and ebx are not scratch. How MMX */

/* etc. registers should be treated, I have no idea. */

asm("pushl %ebp; call GC_push_one; addl $4,%esp");

asm("pushl %esi; call GC_push_one; addl $4,%esp");

asm("pushl %edi; call GC_push_one; addl $4,%esp");

asm("pushl %ebx; call GC_push_one; addl $4,%esp");

# endif

# if defined(I386) && defined(MSWIN32) && !defined(__MINGW32__) \

&& !defined(USE_GENERIC)

/* I386 code, Microsoft variant */

__asm push eax

__asm call GC_push_one

Line 268 void GC_push_regs()

Line 317 void GC_push_regs()

asm ("movd r7, tos"); asm ("bsr ?_GC_push_one"); asm ("adjspb $-4");

# endif

# ifdef SPARC

# if defined(SPARC)

{

word GC_save_regs_in_stack();

/* generic code will not work */

GC_save_regs_ret_val = GC_save_regs_in_stack();

(void)GC_save_regs_in_stack();

}

# endif

Line 333 void GC_push_regs()

Line 381 void GC_push_regs()

# endif /* !__GNUC__ */

# endif /* M68K/SYSV */

# if defined(PJ)

{

extern int *__libc_stack_end;

GC_push_all_stack (sp, __libc_stack_end);

}

# endif

/* other machines... */

# if !(defined M68K) && !(defined VAX) && !(defined RT)

# if !(defined SPARC) && !(defined I386) && !(defined NS32K)

# if !defined(POWERPC) && !defined(UTS4)

# if !defined(PJ) && !(defined(MIPS) && defined(LINUX))

--> bad news <--

# endif

Line 363 ptr_t cold_gc_frame;

Line 421 ptr_t cold_gc_frame;

for (; (char *)i < lim; i++) {

*i = 0;

}

# if defined(POWERPC) || defined(MSWIN32) || defined(UTS4)

# if defined(POWERPC) || defined(MSWIN32) || defined(MSWINCE) \

|| defined(UTS4) || defined(LINUX)

(void) setjmp(regs);

# else

(void) _setjmp(regs);

# endif

# if defined(SPARC) || defined(IA64)

/* On a register window machine, we need to save register */

/* contents on the stack for this to work. The setjmp */

/* is probably not needed on SPARC, since pointers are */

/* only stored in windowed or scratch registers. It is */

/* needed on IA64, since some non-windowed registers are */

/* preserved. */

{

word GC_save_regs_in_stack();

GC_save_regs_ret_val = GC_save_regs_in_stack();

}

# endif

GC_push_current_stack(cold_gc_frame);

}

Line 385 ptr_t cold_gc_frame;

Line 457 ptr_t cold_gc_frame;

asm(" .globl _GC_save_regs_in_stack");

asm("_GC_save_regs_in_stack:");

# endif

asm(" ta 0x3 ! ST_FLUSH_WINDOWS");

# if defined(__arch64__) || defined(__sparcv9)

asm(" mov %sp,%o0");

asm(" save %sp,-128,%sp");

asm(" retl");

asm(" flushw");

asm(" nop");

asm(" ret");

asm(" restore %sp,2047+128,%o0");

# else

asm(" ta 0x3 ! ST_FLUSH_WINDOWS");

asm(" retl");

asm(" mov %sp,%o0");

# endif

# ifdef SVR4

asm(" .GC_save_regs_in_stack_end:");

asm(" .size GC_save_regs_in_stack,.GC_save_regs_in_stack_end-GC_save_regs_in_stack");

Line 398 ptr_t cold_gc_frame;

Line 476 ptr_t cold_gc_frame;

# endif

/* On IA64, we also need to flush register windows. But they end */

/* up on the other side of the stack segment. */

/* Returns the backing store pointer for the register stack. */

# ifdef IA64

# ifdef __GNUC__

asm(" .text");

asm(" .psr abi64");

asm(" .psr lsb");

asm(" .lsb");

asm("");

asm(" .text");

asm(" .align 16");

asm(" .global GC_save_regs_in_stack");

asm(" .proc GC_save_regs_in_stack");

asm("GC_save_regs_in_stack:");

asm(" .body");

asm(" flushrs");

asm(" ;;");

asm(" mov r8=ar.bsp");

asm(" br.ret.sptk.few rp");

asm(" .endp GC_save_regs_in_stack");

# else

void GC_save_regs_in_stack() {

asm(" flushrs");

asm(" ;;");

asm(" mov r8=ar.bsp");

asm(" br.ret.sptk.few rp");

}

# endif

/* GC_clear_stack_inner(arg, limit) clears stack area up to limit and */

/* returns arg. Stack clearing is crucial on SPARC, so we supply */

Line 415 ptr_t cold_gc_frame;

Line 523 ptr_t cold_gc_frame;

asm("GC_clear_stack_inner:");

asm(".type GC_save_regs_in_stack,#function");

# endif

#if defined(__arch64__) || defined(__sparcv9)

asm("mov %sp,%o2"); /* Save sp */

asm("add %sp,2047-8,%o3"); /* p = sp+bias-8 */

asm("add %o1,-2047-192,%sp"); /* Move sp out of the way, */

/* so that traps still work. */

/* Includes some extra words */

/* so we can be sloppy below. */

asm("loop:");

asm("stx %g0,[%o3]"); /* *(long *)p = 0 */

asm("cmp %o3,%o1");

asm("bgu,pt %xcc, loop"); /* if (p > limit) goto loop */

asm("add %o3,-8,%o3"); /* p -= 8 (delay slot) */

asm("retl");

asm("mov %o2,%sp"); /* Restore sp., delay slot */

#else

asm("mov %sp,%o2"); /* Save sp */

asm("add %sp,-8,%o3"); /* p = sp-8 */

asm("clr %g1"); /* [g0,g1] = 0 */

Line 429 ptr_t cold_gc_frame;

Line 552 ptr_t cold_gc_frame;

asm("add %o3,-8,%o3"); /* p -= 8 (delay slot) */

asm("retl");

asm("mov %o2,%sp"); /* Restore sp., delay slot */

#endif /* old SPARC */

/* First argument = %o0 = return value */

# ifdef SVR4

asm(" .GC_clear_stack_inner_end:");

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