version 1.1.1.1, 1999/12/03 07:39:09 |
version 1.6, 2002/07/24 08:00:10 |
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* modified is included with the above copyright notice. |
* modified is included with the above copyright notice. |
*/ |
*/ |
/* Boehm, November 17, 1995 12:13 pm PST */ |
/* Boehm, November 17, 1995 12:13 pm PST */ |
# include "gc_priv.h" |
# include "private/gc_priv.h" |
# include <stdio.h> |
# include <stdio.h> |
# include <setjmp.h> |
# include <setjmp.h> |
# if defined(OS2) || defined(CX_UX) |
# if defined(OS2) || defined(CX_UX) |
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# endif |
# endif |
# ifdef AMIGA |
# ifdef AMIGA |
# ifndef __GNUC__ |
# ifndef __GNUC__ |
# include <dos/dos.h> |
# include <dos.h> |
# else |
# else |
# include <machine/reg.h> |
# include <machine/reg.h> |
# endif |
# endif |
Line 62 asm static void PushMacRegisters() |
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Line 62 asm static void PushMacRegisters() |
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#endif /* __MWERKS__ */ |
#endif /* __MWERKS__ */ |
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# if defined(SPARC) || defined(IA64) |
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/* Value returned from register flushing routine; either sp (SPARC) */ |
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/* or ar.bsp (IA64) */ |
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word GC_save_regs_ret_val; |
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# endif |
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/* Routine to mark from registers that are preserved by the C compiler. */ |
/* Routine to mark from registers that are preserved by the C compiler. */ |
/* This must be ported to every new architecture. There is a generic */ |
/* This must be ported to every new architecture. There is a generic */ |
/* version at the end, that is likely, but not guaranteed to work */ |
/* version at the end, that is likely, but not guaranteed to work */ |
Line 74 void GC_push_regs() |
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Line 80 void GC_push_regs() |
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# ifdef RT |
# ifdef RT |
register long TMP_SP; /* must be bound to r11 */ |
register long TMP_SP; /* must be bound to r11 */ |
# endif |
# endif |
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# ifdef VAX |
# ifdef VAX |
/* VAX - generic code below does not work under 4.2 */ |
/* VAX - generic code below does not work under 4.2 */ |
/* r1 through r5 are caller save, and therefore */ |
/* r1 through r5 are caller save, and therefore */ |
Line 154 void GC_push_regs() |
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Line 161 void GC_push_regs() |
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# else /* !__GNUC__ */ |
# else /* !__GNUC__ */ |
GC_push_one(getreg(REG_A2)); |
GC_push_one(getreg(REG_A2)); |
GC_push_one(getreg(REG_A3)); |
GC_push_one(getreg(REG_A3)); |
GC_push_one(getreg(REG_A4)); |
# ifndef __SASC |
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/* Can probably be changed to #if 0 -Kjetil M. (a4=globals)*/ |
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GC_push_one(getreg(REG_A4)); |
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# endif |
GC_push_one(getreg(REG_A5)); |
GC_push_one(getreg(REG_A5)); |
GC_push_one(getreg(REG_A6)); |
GC_push_one(getreg(REG_A6)); |
/* Skip stack pointer */ |
/* Skip stack pointer */ |
Line 193 void GC_push_regs() |
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Line 203 void GC_push_regs() |
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# endif /* __MWERKS__ */ |
# endif /* __MWERKS__ */ |
# endif /* MACOS */ |
# endif /* MACOS */ |
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# if defined(I386) &&!defined(OS2) &&!defined(SVR4) &&!defined(MSWIN32) \ |
# if defined(I386) &&!defined(OS2) &&!defined(SVR4) \ |
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&& (defined(__MINGW32__) || !defined(MSWIN32)) \ |
&& !defined(SCO) && !defined(SCO_ELF) \ |
&& !defined(SCO) && !defined(SCO_ELF) \ |
&& !(defined(LINUX) && defined(__ELF__)) \ |
&& !(defined(LINUX) && defined(__ELF__)) \ |
&& !(defined(__FreeBSD__) && defined(__ELF__)) \ |
&& !(defined(FREEBSD) && defined(__ELF__)) \ |
&& !defined(DOS4GW) |
&& !(defined(NETBSD) && defined(__ELF__)) \ |
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&& !(defined(OPENBSD) && defined(__ELF__)) \ |
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&& !(defined(BEOS) && defined(__ELF__)) \ |
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&& !defined(DOS4GW) && !defined(HURD) |
/* I386 code, generic code does not appear to work */ |
/* I386 code, generic code does not appear to work */ |
/* It does appear to work under OS2, and asms dont */ |
/* It does appear to work under OS2, and asms dont */ |
/* This is used for some 38g UNIX variants and for CYGWIN32 */ |
/* This is used for some 38g UNIX variants and for CYGWIN32 */ |
Line 211 void GC_push_regs() |
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Line 225 void GC_push_regs() |
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# endif |
# endif |
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# if ( defined(I386) && defined(LINUX) && defined(__ELF__) ) \ |
# if ( defined(I386) && defined(LINUX) && defined(__ELF__) ) \ |
|| ( defined(I386) && defined(__FreeBSD__) && defined(__ELF__) ) |
|| ( defined(I386) && defined(FREEBSD) && defined(__ELF__) ) \ |
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|| ( defined(I386) && defined(NETBSD) && defined(__ELF__) ) \ |
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|| ( defined(I386) && defined(OPENBSD) && defined(__ELF__) ) \ |
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|| ( defined(I386) && defined(HURD) && defined(__ELF__) ) \ |
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|| ( defined(I386) && defined(DGUX) ) |
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/* This is modified for Linux with ELF (Note: _ELF_ only) */ |
/* This is modified for Linux with ELF (Note: _ELF_ only) */ |
/* This section handles FreeBSD with ELF. */ |
/* 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"); |
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asm("pushl %ebp; call GC_push_one; addl $4,%esp"); |
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asm("pushl %esi; call GC_push_one; addl $4,%esp"); |
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asm("pushl %edi; call GC_push_one; addl $4,%esp"); |
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asm("pushl %ebx; call GC_push_one; addl $4,%esp"); |
# endif |
# endif |
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# if defined(I386) && defined(MSWIN32) && !defined(USE_GENERIC) |
# if ( defined(I386) && defined(BEOS) && defined(__ELF__) ) |
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/* As far as I can understand from */ |
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/* http://www.beunited.org/articles/jbq/nasm.shtml, */ |
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/* only ebp, esi, edi and ebx are not scratch. How MMX */ |
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/* etc. registers should be treated, I have no idea. */ |
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asm("pushl %ebp; call GC_push_one; addl $4,%esp"); |
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asm("pushl %esi; call GC_push_one; addl $4,%esp"); |
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asm("pushl %edi; call GC_push_one; addl $4,%esp"); |
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asm("pushl %ebx; call GC_push_one; addl $4,%esp"); |
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# endif |
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# if defined(I386) && defined(MSWIN32) && !defined(__MINGW32__) \ |
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&& !defined(USE_GENERIC) |
/* I386 code, Microsoft variant */ |
/* I386 code, Microsoft variant */ |
__asm push eax |
__asm push eax |
__asm call GC_push_one |
__asm call GC_push_one |
Line 268 void GC_push_regs() |
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Line 302 void GC_push_regs() |
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asm ("movd r7, tos"); asm ("bsr ?_GC_push_one"); asm ("adjspb $-4"); |
asm ("movd r7, tos"); asm ("bsr ?_GC_push_one"); asm ("adjspb $-4"); |
# endif |
# endif |
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# ifdef SPARC |
# if defined(SPARC) |
{ |
{ |
word GC_save_regs_in_stack(); |
word GC_save_regs_in_stack(); |
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/* generic code will not work */ |
GC_save_regs_ret_val = GC_save_regs_in_stack(); |
(void)GC_save_regs_in_stack(); |
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} |
} |
# endif |
# endif |
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Line 333 void GC_push_regs() |
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Line 366 void GC_push_regs() |
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# endif /* !__GNUC__ */ |
# endif /* !__GNUC__ */ |
# endif /* M68K/SYSV */ |
# endif /* M68K/SYSV */ |
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# if defined(PJ) |
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{ |
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register int * sp asm ("optop"); |
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extern int *__libc_stack_end; |
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GC_push_all_stack (sp, __libc_stack_end); |
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} |
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# endif |
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/* other machines... */ |
/* other machines... */ |
# if !(defined M68K) && !(defined VAX) && !(defined RT) |
# if !defined(M68K) && !defined(VAX) && !defined(RT) |
# if !(defined SPARC) && !(defined I386) && !(defined NS32K) |
# if !defined(SPARC) && !defined(I386) && !defined(NS32K) |
# if !defined(POWERPC) && !defined(UTS4) |
# if !defined(POWERPC) && !defined(UTS4) |
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# if !defined(PJ) && !(defined(MIPS) && defined(LINUX)) |
--> bad news <-- |
--> bad news <-- |
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# endif |
# endif |
# endif |
# endif |
# endif |
# endif |
# endif |
Line 349 void GC_push_regs() |
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Line 392 void GC_push_regs() |
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void GC_generic_push_regs(cold_gc_frame) |
void GC_generic_push_regs(cold_gc_frame) |
ptr_t cold_gc_frame; |
ptr_t cold_gc_frame; |
{ |
{ |
/* Generic code */ |
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/* The idea is due to Parag Patel at HP. */ |
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/* We're not sure whether he would like */ |
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/* to be he acknowledged for it or not. */ |
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{ |
{ |
static jmp_buf regs; |
# ifdef HAVE_BUILTIN_UNWIND_INIT |
register word * i = (word *) regs; |
/* This was suggested by Richard Henderson as the way to */ |
register ptr_t lim = (ptr_t)(regs) + (sizeof regs); |
/* force callee-save registers and register windows onto */ |
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/* the stack. */ |
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__builtin_unwind_init(); |
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# else /* !HAVE_BUILTIN_UNWIND_INIT */ |
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/* Generic code */ |
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/* The idea is due to Parag Patel at HP. */ |
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/* We're not sure whether he would like */ |
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/* to be he acknowledged for it or not. */ |
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jmp_buf regs; |
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register word * i = (word *) regs; |
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register ptr_t lim = (ptr_t)(regs) + (sizeof regs); |
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/* Setjmp on Sun 3s doesn't clear all of the buffer. */ |
/* Setjmp doesn't always clear all of the buffer. */ |
/* That tends to preserve garbage. Clear it. */ |
/* That tends to preserve garbage. Clear it. */ |
for (; (char *)i < lim; i++) { |
for (; (char *)i < lim; i++) { |
*i = 0; |
*i = 0; |
} |
} |
# if defined(POWERPC) || defined(MSWIN32) || defined(UTS4) |
# if defined(POWERPC) || defined(MSWIN32) || defined(MSWINCE) \ |
(void) setjmp(regs); |
|| defined(UTS4) || defined(LINUX) || defined(EWS4800) |
# else |
(void) setjmp(regs); |
(void) _setjmp(regs); |
# else |
# endif |
(void) _setjmp(regs); |
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# endif |
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# endif /* !HAVE_BUILTIN_UNWIND_INIT */ |
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# if (defined(SPARC) && !defined(HAVE_BUILTIN_UNWIND_INIT)) \ |
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|| defined(IA64) |
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/* On a register window machine, we need to save register */ |
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/* contents on the stack for this to work. The setjmp */ |
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/* is probably not needed on SPARC, since pointers are */ |
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/* only stored in windowed or scratch registers. It is */ |
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/* needed on IA64, since some non-windowed registers are */ |
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/* preserved. */ |
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{ |
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word GC_save_regs_in_stack(); |
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GC_save_regs_ret_val = GC_save_regs_in_stack(); |
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/* On IA64 gcc, could use __builtin_ia64_flushrs() and */ |
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/* __builtin_ia64_flushrs(). The latter will be done */ |
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/* implicitly by __builtin_unwind_init() for gcc3.0.1 */ |
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/* and later. */ |
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} |
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# endif |
GC_push_current_stack(cold_gc_frame); |
GC_push_current_stack(cold_gc_frame); |
} |
} |
} |
} |
Line 385 ptr_t cold_gc_frame; |
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Line 454 ptr_t cold_gc_frame; |
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asm(" .globl _GC_save_regs_in_stack"); |
asm(" .globl _GC_save_regs_in_stack"); |
asm("_GC_save_regs_in_stack:"); |
asm("_GC_save_regs_in_stack:"); |
# endif |
# 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"); |
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asm(" restore %sp,2047+128,%o0"); |
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# else |
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asm(" ta 0x3 ! ST_FLUSH_WINDOWS"); |
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asm(" retl"); |
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asm(" mov %sp,%o0"); |
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# endif |
# ifdef SVR4 |
# ifdef SVR4 |
asm(" .GC_save_regs_in_stack_end:"); |
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"); |
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; |
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Line 473 ptr_t cold_gc_frame; |
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# endif |
# endif |
# endif |
# endif |
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/* On IA64, we also need to flush register windows. But they end */ |
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/* up on the other side of the stack segment. */ |
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/* Returns the backing store pointer for the register stack. */ |
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/* We now implement this as a separate assembly file, since inline */ |
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/* assembly code here doesn't work with either the Intel or HP */ |
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/* compilers. */ |
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# if 0 |
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# ifdef LINUX |
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asm(" .text"); |
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asm(" .psr abi64"); |
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asm(" .psr lsb"); |
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asm(" .lsb"); |
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asm(""); |
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asm(" .text"); |
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asm(" .align 16"); |
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asm(" .global GC_save_regs_in_stack"); |
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asm(" .proc GC_save_regs_in_stack"); |
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asm("GC_save_regs_in_stack:"); |
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asm(" .body"); |
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asm(" flushrs"); |
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asm(" ;;"); |
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asm(" mov r8=ar.bsp"); |
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asm(" br.ret.sptk.few rp"); |
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asm(" .endp GC_save_regs_in_stack"); |
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# endif /* LINUX */ |
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# if 0 /* Other alternatives that don't work on HP/UX */ |
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word GC_save_regs_in_stack() { |
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# if USE_BUILTINS |
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__builtin_ia64_flushrs(); |
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return __builtin_ia64_bsp(); |
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# else |
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# ifdef HPUX |
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_asm(" flushrs"); |
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_asm(" ;;"); |
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_asm(" mov r8=ar.bsp"); |
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_asm(" br.ret.sptk.few rp"); |
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# else |
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asm(" flushrs"); |
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asm(" ;;"); |
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asm(" mov r8=ar.bsp"); |
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asm(" br.ret.sptk.few rp"); |
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# endif |
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# endif |
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} |
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# endif |
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# endif |
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/* GC_clear_stack_inner(arg, limit) clears stack area up to limit and */ |
/* GC_clear_stack_inner(arg, limit) clears stack area up to limit and */ |
/* returns arg. Stack clearing is crucial on SPARC, so we supply */ |
/* returns arg. Stack clearing is crucial on SPARC, so we supply */ |
/* an assembly version that's more careful. Assumes limit is hotter */ |
/* an assembly version that's more careful. Assumes limit is hotter */ |
/* than sp, and limit is 8 byte aligned. */ |
/* than sp, and limit is 8 byte aligned. */ |
#if defined(ASM_CLEAR_CODE) && !defined(THREADS) |
#if defined(ASM_CLEAR_CODE) |
#ifndef SPARC |
#ifndef SPARC |
--> fix it |
--> fix it |
#endif |
#endif |
Line 415 ptr_t cold_gc_frame; |
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Line 536 ptr_t cold_gc_frame; |
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asm("GC_clear_stack_inner:"); |
asm("GC_clear_stack_inner:"); |
asm(".type GC_save_regs_in_stack,#function"); |
asm(".type GC_save_regs_in_stack,#function"); |
# endif |
# endif |
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#if defined(__arch64__) || defined(__sparcv9) |
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asm("mov %sp,%o2"); /* Save sp */ |
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asm("add %sp,2047-8,%o3"); /* p = sp+bias-8 */ |
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asm("add %o1,-2047-192,%sp"); /* Move sp out of the way, */ |
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/* so that traps still work. */ |
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/* Includes some extra words */ |
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/* so we can be sloppy below. */ |
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asm("loop:"); |
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asm("stx %g0,[%o3]"); /* *(long *)p = 0 */ |
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asm("cmp %o3,%o1"); |
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asm("bgu,pt %xcc, loop"); /* if (p > limit) goto loop */ |
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asm("add %o3,-8,%o3"); /* p -= 8 (delay slot) */ |
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asm("retl"); |
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asm("mov %o2,%sp"); /* Restore sp., delay slot */ |
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#else |
asm("mov %sp,%o2"); /* Save sp */ |
asm("mov %sp,%o2"); /* Save sp */ |
asm("add %sp,-8,%o3"); /* p = sp-8 */ |
asm("add %sp,-8,%o3"); /* p = sp-8 */ |
asm("clr %g1"); /* [g0,g1] = 0 */ |
asm("clr %g1"); /* [g0,g1] = 0 */ |
Line 429 ptr_t cold_gc_frame; |
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Line 565 ptr_t cold_gc_frame; |
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asm("add %o3,-8,%o3"); /* p -= 8 (delay slot) */ |
asm("add %o3,-8,%o3"); /* p -= 8 (delay slot) */ |
asm("retl"); |
asm("retl"); |
asm("mov %o2,%sp"); /* Restore sp., delay slot */ |
asm("mov %o2,%sp"); /* Restore sp., delay slot */ |
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#endif /* old SPARC */ |
/* First argument = %o0 = return value */ |
/* First argument = %o0 = return value */ |
# ifdef SVR4 |
# ifdef SVR4 |
asm(" .GC_clear_stack_inner_end:"); |
asm(" .GC_clear_stack_inner_end:"); |