| /* |
| * Copyright 1988, 1989 Hans-J. Boehm, Alan J. Demers |
| * Copyright (c) 1991-1994 by Xerox Corporation. All rights reserved. |
| * |
| * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED |
| * OR IMPLIED. ANY USE IS AT YOUR OWN RISK. |
| * |
| * Permission is hereby granted to use or copy this program |
| * for any purpose, provided the above notices are retained on all copies. |
| * Permission to modify the code and to distribute modified code is granted, |
| * provided the above notices are retained, and a notice that the code was |
| * modified is included with the above copyright notice. |
| */ |
| /* Boehm, November 17, 1995 12:13 pm PST */ |
| # include "private/gc_priv.h" |
| # include <stdio.h> |
| # include <setjmp.h> |
| # if defined(OS2) || defined(CX_UX) |
| # define _setjmp(b) setjmp(b) |
| # define _longjmp(b,v) longjmp(b,v) |
| # endif |
| # ifdef AMIGA |
| # ifndef __GNUC__ |
| # include <dos.h> |
| # else |
| # include <machine/reg.h> |
| # endif |
| # endif |
| |
| #if defined(RS6000) || defined(POWERPC) |
| # include <ucontext.h> |
| #endif |
| |
| #if defined(__MWERKS__) && !defined(POWERPC) |
| |
| asm static void PushMacRegisters() |
| { |
| sub.w #4,sp // reserve space for one parameter. |
| move.l a2,(sp) |
| jsr GC_push_one |
| move.l a3,(sp) |
| jsr GC_push_one |
| move.l a4,(sp) |
| jsr GC_push_one |
| # if !__option(a6frames) |
| // <pcb> perhaps a6 should be pushed if stack frames are not being used. |
| move.l a6,(sp) |
| jsr GC_push_one |
| # endif |
| // skip a5 (globals), a6 (frame pointer), and a7 (stack pointer) |
| move.l d2,(sp) |
| jsr GC_push_one |
| move.l d3,(sp) |
| jsr GC_push_one |
| move.l d4,(sp) |
| jsr GC_push_one |
| move.l d5,(sp) |
| jsr GC_push_one |
| move.l d6,(sp) |
| jsr GC_push_one |
| move.l d7,(sp) |
| jsr GC_push_one |
| add.w #4,sp // fix stack. |
| rts |
| } |
| |
| #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 */ |
| /* on your architecture. Run the test_setjmp program to see whether */ |
| /* there is any chance it will work. */ |
| |
| #if !defined(USE_GENERIC_PUSH_REGS) && !defined(USE_ASM_PUSH_REGS) |
| #undef HAVE_PUSH_REGS |
| void GC_push_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_push_one"); |
| asm("pushl r10"); asm("calls $1,_GC_push_one"); |
| asm("pushl r9"); asm("calls $1,_GC_push_one"); |
| asm("pushl r8"); asm("calls $1,_GC_push_one"); |
| asm("pushl r7"); asm("calls $1,_GC_push_one"); |
| asm("pushl r6"); asm("calls $1,_GC_push_one"); |
| # define HAVE_PUSH_REGS |
| # endif |
| # if defined(M68K) && (defined(SUNOS4) || defined(NEXT)) |
| /* 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_push_one"); |
| asm("movl a3,sp@"); asm("jbsr _GC_push_one"); |
| asm("movl a4,sp@"); asm("jbsr _GC_push_one"); |
| asm("movl a5,sp@"); asm("jbsr _GC_push_one"); |
| /* Skip frame pointer and stack pointer */ |
| asm("movl d1,sp@"); asm("jbsr _GC_push_one"); |
| asm("movl d2,sp@"); asm("jbsr _GC_push_one"); |
| asm("movl d3,sp@"); asm("jbsr _GC_push_one"); |
| asm("movl d4,sp@"); asm("jbsr _GC_push_one"); |
| asm("movl d5,sp@"); asm("jbsr _GC_push_one"); |
| asm("movl d6,sp@"); asm("jbsr _GC_push_one"); |
| asm("movl d7,sp@"); asm("jbsr _GC_push_one"); |
| |
| asm("addqw #0x4,sp"); /* put stack back where it was */ |
| # define HAVE_PUSH_REGS |
| # 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_push_one"); |
| asm("mov.l %a3,(%sp)"); asm("jsr _GC_push_one"); |
| asm("mov.l %a4,(%sp)"); asm("jsr _GC_push_one"); |
| asm("mov.l %a5,(%sp)"); asm("jsr _GC_push_one"); |
| /* Skip frame pointer and stack pointer */ |
| asm("mov.l %d1,(%sp)"); asm("jsr _GC_push_one"); |
| asm("mov.l %d2,(%sp)"); asm("jsr _GC_push_one"); |
| asm("mov.l %d3,(%sp)"); asm("jsr _GC_push_one"); |
| asm("mov.l %d4,(%sp)"); asm("jsr _GC_push_one"); |
| asm("mov.l %d5,(%sp)"); asm("jsr _GC_push_one"); |
| asm("mov.l %d6,(%sp)"); asm("jsr _GC_push_one"); |
| asm("mov.l %d7,(%sp)"); asm("jsr _GC_push_one"); |
| |
| asm("addq.w &0x4,%sp"); /* put stack back where it was */ |
| # define HAVE_PUSH_REGS |
| # endif /* M68K HP */ |
| |
| # if defined(M68K) && defined(AMIGA) |
| /* AMIGA - could be replaced by generic code */ |
| /* a0, a1, d0 and d1 are caller save */ |
| |
| # ifdef __GNUC__ |
| asm("subq.w &0x4,%sp"); /* allocate word on top of stack */ |
| |
| asm("mov.l %a2,(%sp)"); asm("jsr _GC_push_one"); |
| asm("mov.l %a3,(%sp)"); asm("jsr _GC_push_one"); |
| asm("mov.l %a4,(%sp)"); asm("jsr _GC_push_one"); |
| asm("mov.l %a5,(%sp)"); asm("jsr _GC_push_one"); |
| asm("mov.l %a6,(%sp)"); asm("jsr _GC_push_one"); |
| /* Skip frame pointer and stack pointer */ |
| asm("mov.l %d2,(%sp)"); asm("jsr _GC_push_one"); |
| asm("mov.l %d3,(%sp)"); asm("jsr _GC_push_one"); |
| asm("mov.l %d4,(%sp)"); asm("jsr _GC_push_one"); |
| asm("mov.l %d5,(%sp)"); asm("jsr _GC_push_one"); |
| asm("mov.l %d6,(%sp)"); asm("jsr _GC_push_one"); |
| asm("mov.l %d7,(%sp)"); asm("jsr _GC_push_one"); |
| |
| asm("addq.w &0x4,%sp"); /* put stack back where it was */ |
| # define HAVE_PUSH_REGS |
| # else /* !__GNUC__ */ |
| GC_push_one(getreg(REG_A2)); |
| GC_push_one(getreg(REG_A3)); |
| # 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 */ |
| GC_push_one(getreg(REG_D2)); |
| GC_push_one(getreg(REG_D3)); |
| GC_push_one(getreg(REG_D4)); |
| GC_push_one(getreg(REG_D5)); |
| GC_push_one(getreg(REG_D6)); |
| GC_push_one(getreg(REG_D7)); |
| # define HAVE_PUSH_REGS |
| # endif /* !__GNUC__ */ |
| # endif /* AMIGA */ |
| |
| # if defined(M68K) && defined(MACOS) |
| # if defined(THINK_C) |
| # define PushMacReg(reg) \ |
| move.l reg,(sp) \ |
| jsr GC_push_one |
| asm { |
| sub.w #4,sp ; reserve space for one parameter. |
| PushMacReg(a2); |
| PushMacReg(a3); |
| PushMacReg(a4); |
| ; skip a5 (globals), a6 (frame pointer), and a7 (stack pointer) |
| PushMacReg(d2); |
| PushMacReg(d3); |
| PushMacReg(d4); |
| PushMacReg(d5); |
| PushMacReg(d6); |
| PushMacReg(d7); |
| add.w #4,sp ; fix stack. |
| } |
| # define HAVE_PUSH_REGS |
| # undef PushMacReg |
| # endif /* THINK_C */ |
| # if defined(__MWERKS__) |
| PushMacRegisters(); |
| # define HAVE_PUSH_REGS |
| # endif /* __MWERKS__ */ |
| # endif /* MACOS */ |
| |
| # 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(NETBSD) && defined(__ELF__)) \ |
| && !(defined(OPENBSD) && defined(__ELF__)) \ |
| && !(defined(BEOS) && defined(__ELF__)) \ |
| && !defined(DOS4GW) && !defined(HURD) |
| /* I386 code, generic code does not appear to work */ |
| /* It does appear to work under OS2, and asms dont */ |
| /* This is used for some 38g UNIX variants and for CYGWIN32 */ |
| asm("pushl %eax"); asm("call _GC_push_one"); asm("addl $4,%esp"); |
| asm("pushl %ecx"); asm("call _GC_push_one"); asm("addl $4,%esp"); |
| asm("pushl %edx"); asm("call _GC_push_one"); asm("addl $4,%esp"); |
| asm("pushl %ebp"); asm("call _GC_push_one"); asm("addl $4,%esp"); |
| asm("pushl %esi"); asm("call _GC_push_one"); asm("addl $4,%esp"); |
| asm("pushl %edi"); asm("call _GC_push_one"); asm("addl $4,%esp"); |
| asm("pushl %ebx"); asm("call _GC_push_one"); asm("addl $4,%esp"); |
| # define HAVE_PUSH_REGS |
| # endif |
| |
| # if ( defined(I386) && defined(LINUX) && defined(__ELF__) ) \ |
| || ( defined(I386) && defined(FREEBSD) && defined(__ELF__) ) \ |
| || ( defined(I386) && defined(NETBSD) && defined(__ELF__) ) \ |
| || ( defined(I386) && defined(OPENBSD) && defined(__ELF__) ) \ |
| || ( defined(I386) && defined(HURD) && defined(__ELF__) ) \ |
| || ( defined(I386) && defined(DGUX) ) |
| |
| /* This is modified for Linux with ELF (Note: _ELF_ only) */ |
| /* This section handles FreeBSD with ELF. */ |
| /* Eax is caller-save and dead here. Other caller-save */ |
| /* registers could also be skipped. We assume there are no */ |
| /* pointers in MMX registers, etc. */ |
| /* We combine instructions in a single asm to prevent gcc from */ |
| /* inserting code in the middle. */ |
| asm("pushl %ecx; call GC_push_one; 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"); |
| # define HAVE_PUSH_REGS |
| # endif |
| |
| # 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"); |
| # define HAVE_PUSH_REGS |
| # endif |
| |
| # if defined(I386) && defined(MSWIN32) && !defined(__MINGW32__) \ |
| && !defined(USE_GENERIC) |
| /* I386 code, Microsoft variant */ |
| __asm push eax |
| __asm call GC_push_one |
| __asm add esp,4 |
| __asm push ebx |
| __asm call GC_push_one |
| __asm add esp,4 |
| __asm push ecx |
| __asm call GC_push_one |
| __asm add esp,4 |
| __asm push edx |
| __asm call GC_push_one |
| __asm add esp,4 |
| __asm push ebp |
| __asm call GC_push_one |
| __asm add esp,4 |
| __asm push esi |
| __asm call GC_push_one |
| __asm add esp,4 |
| __asm push edi |
| __asm call GC_push_one |
| __asm add esp,4 |
| # define HAVE_PUSH_REGS |
| # endif |
| |
| # if defined(I386) && (defined(SVR4) || defined(SCO) || defined(SCO_ELF)) |
| /* I386 code, SVR4 variant, generic code does not appear to work */ |
| asm("pushl %eax"); asm("call GC_push_one"); asm("addl $4,%esp"); |
| asm("pushl %ebx"); asm("call GC_push_one"); asm("addl $4,%esp"); |
| asm("pushl %ecx"); asm("call GC_push_one"); asm("addl $4,%esp"); |
| asm("pushl %edx"); asm("call GC_push_one"); asm("addl $4,%esp"); |
| asm("pushl %ebp"); asm("call GC_push_one"); asm("addl $4,%esp"); |
| asm("pushl %esi"); asm("call GC_push_one"); asm("addl $4,%esp"); |
| asm("pushl %edi"); asm("call GC_push_one"); asm("addl $4,%esp"); |
| # define HAVE_PUSH_REGS |
| # endif |
| |
| # ifdef NS32K |
| asm ("movd r3, tos"); asm ("bsr ?_GC_push_one"); asm ("adjspb $-4"); |
| asm ("movd r4, tos"); asm ("bsr ?_GC_push_one"); asm ("adjspb $-4"); |
| asm ("movd r5, tos"); asm ("bsr ?_GC_push_one"); asm ("adjspb $-4"); |
| asm ("movd r6, tos"); asm ("bsr ?_GC_push_one"); asm ("adjspb $-4"); |
| asm ("movd r7, tos"); asm ("bsr ?_GC_push_one"); asm ("adjspb $-4"); |
| # define HAVE_PUSH_REGS |
| # endif |
| |
| # if defined(SPARC) |
| GC_save_regs_ret_val = GC_save_regs_in_stack(); |
| # define HAVE_PUSH_REGS |
| # endif |
| |
| # ifdef RT |
| GC_push_one(TMP_SP); /* GC_push_one from r11 */ |
| |
| asm("cas r11, r6, r0"); GC_push_one(TMP_SP); /* r6 */ |
| asm("cas r11, r7, r0"); GC_push_one(TMP_SP); /* through */ |
| asm("cas r11, r8, r0"); GC_push_one(TMP_SP); /* r10 */ |
| asm("cas r11, r9, r0"); GC_push_one(TMP_SP); |
| asm("cas r11, r10, r0"); GC_push_one(TMP_SP); |
| |
| asm("cas r11, r12, r0"); GC_push_one(TMP_SP); /* r12 */ |
| asm("cas r11, r13, r0"); GC_push_one(TMP_SP); /* through */ |
| asm("cas r11, r14, r0"); GC_push_one(TMP_SP); /* r15 */ |
| asm("cas r11, r15, r0"); GC_push_one(TMP_SP); |
| # define HAVE_PUSH_REGS |
| # 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_push_one"); |
| asm("movl %a3,%sp@"); asm("jbsr GC_push_one"); |
| asm("movl %a4,%sp@"); asm("jbsr GC_push_one"); |
| asm("movl %a5,%sp@"); asm("jbsr GC_push_one"); |
| /* Skip frame pointer and stack pointer */ |
| asm("movl %d1,%sp@"); asm("jbsr GC_push_one"); |
| asm("movl %d2,%sp@"); asm("jbsr GC_push_one"); |
| asm("movl %d3,%sp@"); asm("jbsr GC_push_one"); |
| asm("movl %d4,%sp@"); asm("jbsr GC_push_one"); |
| asm("movl %d5,%sp@"); asm("jbsr GC_push_one"); |
| asm("movl %d6,%sp@"); asm("jbsr GC_push_one"); |
| asm("movl %d7,%sp@"); asm("jbsr GC_push_one"); |
| |
| asm("addqw #0x4,%sp"); /* put stack back where it was */ |
| # define HAVE_PUSH_REGS |
| # else /* !__GNUC__*/ |
| asm("subq.w &0x4,%sp"); /* allocate word on top of stack */ |
| |
| asm("mov.l %a2,(%sp)"); asm("jsr GC_push_one"); |
| asm("mov.l %a3,(%sp)"); asm("jsr GC_push_one"); |
| asm("mov.l %a4,(%sp)"); asm("jsr GC_push_one"); |
| asm("mov.l %a5,(%sp)"); asm("jsr GC_push_one"); |
| /* Skip frame pointer and stack pointer */ |
| asm("mov.l %d1,(%sp)"); asm("jsr GC_push_one"); |
| asm("mov.l %d2,(%sp)"); asm("jsr GC_push_one"); |
| asm("mov.l %d3,(%sp)"); asm("jsr GC_push_one"); |
| asm("mov.l %d4,(%sp)"); asm("jsr GC_push_one"); |
| asm("mov.l %d5,(%sp)"); asm("jsr GC_push_one"); |
| asm("mov.l %d6,(%sp)"); asm("jsr GC_push_one"); |
| asm("mov.l %d7,(%sp)"); asm("jsr GC_push_one"); |
| |
| asm("addq.w &0x4,%sp"); /* put stack back where it was */ |
| # define HAVE_PUSH_REGS |
| # endif /* !__GNUC__ */ |
| # endif /* M68K/SYSV */ |
| |
| # if defined(PJ) |
| { |
| register int * sp asm ("optop"); |
| extern int *__libc_stack_end; |
| |
| GC_push_all_stack (sp, __libc_stack_end); |
| # define HAVE_PUSH_REGS |
| /* Isn't this redundant with the code to push the stack? */ |
| } |
| # endif |
| |
| /* other machines... */ |
| # if !defined(HAVE_PUSH_REGS) |
| --> We just generated an empty GC_push_regs, which |
| --> is almost certainly broken. Try defining |
| --> USE_GENERIC_PUSH_REGS instead. |
| # endif |
| } |
| #endif /* !USE_GENERIC_PUSH_REGS && !USE_ASM_PUSH_REGS */ |
| |
| void GC_with_callee_saves_pushed(fn, arg) |
| void (*fn)(); |
| ptr_t arg; |
| { |
| word dummy; |
| |
| # if defined(USE_GENERIC_PUSH_REGS) |
| # ifdef HAVE_BUILTIN_UNWIND_INIT |
| /* This was suggested by Richard Henderson as the way to */ |
| /* force callee-save registers and register windows onto */ |
| /* the stack. */ |
| __builtin_unwind_init(); |
| # else /* !HAVE_BUILTIN_UNWIND_INIT */ |
| # if defined(RS6000) || defined(POWERPC) |
| /* FIXME: RS6000 means AIX. */ |
| /* This should probably be used in all Posix/non-gcc */ |
| /* settings. We defer that change to minimize risk. */ |
| ucontext_t ctxt; |
| getcontext(&ctxt); |
| # else |
| /* 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 doesn't always clear all of the buffer. */ |
| /* That tends to preserve garbage. Clear it. */ |
| for (; (char *)i < lim; i++) { |
| *i = 0; |
| } |
| # if defined(MSWIN32) || defined(MSWINCE) \ |
| || defined(UTS4) || defined(LINUX) || defined(EWS4800) |
| (void) setjmp(regs); |
| # else |
| (void) _setjmp(regs); |
| /* We don't want to mess with signals. According to */ |
| /* SUSV3, setjmp() may or may not save signal mask. */ |
| /* _setjmp won't, but is less portable. */ |
| # endif |
| # endif /* !AIX ... */ |
| # endif /* !HAVE_BUILTIN_UNWIND_INIT */ |
| # else |
| # if defined(PTHREADS) && !defined(MSWIN32) /* !USE_GENERIC_PUSH_REGS */ |
| /* We may still need this to save thread contexts. */ |
| ucontext_t ctxt; |
| getcontext(&ctxt); |
| # else /* Shouldn't be needed */ |
| ABORT("Unexpected call to GC_with_callee_saves_pushed"); |
| # endif |
| # endif |
| # if (defined(SPARC) && !defined(HAVE_BUILTIN_UNWIND_INIT)) \ |
| || 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. */ |
| { |
| GC_save_regs_ret_val = GC_save_regs_in_stack(); |
| /* On IA64 gcc, could use __builtin_ia64_flushrs() and */ |
| /* __builtin_ia64_flushrs(). The latter will be done */ |
| /* implicitly by __builtin_unwind_init() for gcc3.0.1 */ |
| /* and later. */ |
| } |
| # endif |
| fn(arg); |
| /* Strongly discourage the compiler from treating the above */ |
| /* as a tail-call, since that would pop the register */ |
| /* contents before we get a chance to look at them. */ |
| GC_noop1((word)(&dummy)); |
| } |
| |
| #if defined(USE_GENERIC_PUSH_REGS) |
| void GC_generic_push_regs(cold_gc_frame) |
| ptr_t cold_gc_frame; |
| { |
| GC_with_callee_saves_pushed(GC_push_current_stack, cold_gc_frame); |
| } |
| #endif /* USE_GENERIC_PUSH_REGS */ |
| |
| /* On register window machines, we need a way to force registers into */ |
| /* the stack. Return sp. */ |
| # ifdef SPARC |
| asm(" .seg \"text\""); |
| # if defined(SVR4) || defined(NETBSD) || defined(FREEBSD) |
| asm(" .globl GC_save_regs_in_stack"); |
| asm("GC_save_regs_in_stack:"); |
| asm(" .type GC_save_regs_in_stack,#function"); |
| # else |
| asm(" .globl _GC_save_regs_in_stack"); |
| asm("_GC_save_regs_in_stack:"); |
| # endif |
| # if defined(__arch64__) || defined(__sparcv9) |
| asm(" save %sp,-128,%sp"); |
| asm(" flushw"); |
| 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"); |
| # endif |
| # ifdef LINT |
| word GC_save_regs_in_stack() { return(0 /* sp really */);} |
| # endif |
| # 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. */ |
| /* We now implement this as a separate assembly file, since inline */ |
| /* assembly code here doesn't work with either the Intel or HP */ |
| /* compilers. */ |
| # if 0 |
| # ifdef LINUX |
| 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"); |
| # endif /* LINUX */ |
| # if 0 /* Other alternatives that don't work on HP/UX */ |
| word GC_save_regs_in_stack() { |
| # if USE_BUILTINS |
| __builtin_ia64_flushrs(); |
| return __builtin_ia64_bsp(); |
| # else |
| # ifdef HPUX |
| _asm(" flushrs"); |
| _asm(" ;;"); |
| _asm(" mov r8=ar.bsp"); |
| _asm(" br.ret.sptk.few rp"); |
| # else |
| asm(" flushrs"); |
| asm(" ;;"); |
| asm(" mov r8=ar.bsp"); |
| asm(" br.ret.sptk.few rp"); |
| # endif |
| # endif |
| } |
| # endif |
| # 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 */ |
| /* an assembly version that's more careful. Assumes limit is hotter */ |
| /* than sp, and limit is 8 byte aligned. */ |
| #if defined(ASM_CLEAR_CODE) |
| #ifndef SPARC |
| --> fix it |
| #endif |
| # ifdef SUNOS4 |
| asm(".globl _GC_clear_stack_inner"); |
| asm("_GC_clear_stack_inner:"); |
| # else |
| asm(".globl GC_clear_stack_inner"); |
| 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 */ |
| asm("add %o1,-0x60,%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("std %g0,[%o3]"); /* *(long long *)p = 0 */ |
| asm("cmp %o3,%o1"); |
| asm("bgu 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 */ |
| #endif /* old SPARC */ |
| /* First argument = %o0 = return value */ |
| # ifdef SVR4 |
| asm(" .GC_clear_stack_inner_end:"); |
| asm(" .size GC_clear_stack_inner,.GC_clear_stack_inner_end-GC_clear_stack_inner"); |
| # endif |
| |
| # ifdef LINT |
| /*ARGSUSED*/ |
| ptr_t GC_clear_stack_inner(arg, limit) |
| ptr_t arg; word limit; |
| { return(arg); } |
| # endif |
| #endif |
