From 6c63633545c254dc085402e0f927a6826d1dd229 Mon Sep 17 00:00:00 2001 From: Akinori Ito Date: Fri, 9 Nov 2001 04:59:17 +0000 Subject: Updates from 0.2.1 into 0.2.1-inu-1.5 --- gc/mach_dep.c | 232 ++++++++++++++++++++++++++++++++++++++++++++-------------- 1 file changed, 176 insertions(+), 56 deletions(-) (limited to 'gc/mach_dep.c') diff --git a/gc/mach_dep.c b/gc/mach_dep.c index 756adb3..776bf69 100644 --- a/gc/mach_dep.c +++ b/gc/mach_dep.c @@ -12,7 +12,7 @@ * 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 # include # if defined(OS2) || defined(CX_UX) @@ -21,7 +21,7 @@ # endif # ifdef AMIGA # ifndef __GNUC__ -# include +# include # else # include # endif @@ -62,6 +62,12 @@ 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 */ @@ -74,21 +80,24 @@ void GC_push_regs() # ifdef RT register long TMP_SP; /* must be bound to r11 */ # 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"); + 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 +# endif /* MIPS && LINUX */ + # ifdef VAX /* VAX - generic code below does not work under 4.2 */ /* r1 through r5 are caller save, and therefore */ @@ -169,7 +178,10 @@ 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 */ @@ -208,11 +220,15 @@ 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(DOS4GW) + && !(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 */ @@ -226,20 +242,39 @@ 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__) ) \ + || ( defined(I386) && defined(HURD) && 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"); - 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"); + /* 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"); # 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 @@ -283,12 +318,11 @@ 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 */ - (void)GC_save_regs_in_stack(); + GC_save_regs_ret_val = GC_save_regs_in_stack(); } # endif @@ -348,14 +382,22 @@ void GC_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); + } +# endif /* other machines... */ -# if !(defined M68K) && !(defined VAX) && !(defined RT) -# if !(defined SPARC) && !(defined I386) && !(defined NS32K) -# if !defined(POWERPC) && !defined(UTS4) -# if (!defined(MIPS) && !defined(LINUX)) +# 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 +# endif # endif # endif # endif @@ -366,25 +408,51 @@ void GC_push_regs() void GC_generic_push_regs(cold_gc_frame) ptr_t cold_gc_frame; { - /* 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. */ { - static 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. */ +# 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 */ + /* 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(POWERPC) || defined(MSWIN32) || defined(UTS4) - (void) setjmp(regs); -# else - (void) _setjmp(regs); -# endif +# if defined(POWERPC) || defined(MSWIN32) || defined(MSWINCE) \ + || defined(UTS4) || defined(LINUX) + (void) setjmp(regs); +# else + (void) _setjmp(regs); +# endif +# endif /* !HAVE_BUILTIN_UNWIND_INIT */ +# 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. */ + { + word GC_save_regs_in_stack(); + + 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 GC_push_current_stack(cold_gc_frame); } } @@ -402,10 +470,16 @@ 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"); - asm(" mov %sp,%o0"); - asm(" retl"); - asm(" nop"); +# 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"); @@ -415,12 +489,42 @@ ptr_t cold_gc_frame; # 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. */ +# 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 +# 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) && !defined(THREADS) +#if defined(ASM_CLEAR_CODE) #ifndef SPARC --> fix it #endif @@ -432,6 +536,21 @@ 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 */ @@ -446,6 +565,7 @@ 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:"); -- cgit v1.2.3