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|
/***********************************************************************/
/* */
/* Objective Caml */
/* */
/* Xavier Leroy, projet Cristal, INRIA Rocquencourt */
/* */
/* Copyright 1996 Institut National de Recherche en Informatique et */
/* Automatique. Distributed only by permission. */
/* */
/***********************************************************************/
/* $Id$ */
/* Asm part of the runtime system for the Sparc processor. */
/* Must be preprocessed by cpp */
/* SunOS 4 and BSD prefix identifiers with _, Solaris and Linux do not */
#if defined(SYS_sunos) || defined(SYS_bsd)
.common _caml_required_size, 4, "bss"
#define Young_limit _young_limit
#define Young_ptr _young_ptr
#define Caml_bottom_of_stack _caml_bottom_of_stack
#define Caml_last_return_address _caml_last_return_address
#define Caml_gc_regs _caml_gc_regs
#define Caml_exception_pointer _caml_exception_pointer
#define Caml_required_size _caml_required_size
#define Caml_alloc _caml_alloc
#define Caml_call_gc _caml_call_gc
#define Garbage_collection _garbage_collection
#define Caml_c_call _caml_c_call
#define Caml_start_program _caml_start_program
#define Caml_program _caml_program
#define Raise_caml_exception _raise_caml_exception
#define Callback_exn _callback_exn
#define Callback2_exn _callback2_exn
#define Callback3_exn _callback3_exn
#define Caml_apply2 _caml_apply2
#define Caml_apply3 _caml_apply3
#define Mlraise _mlraise
#define System_frametable _system_frametable
#else
.common caml_required_size, 4, 4
#define Young_limit young_limit
#define Young_ptr young_ptr
#define Caml_bottom_of_stack caml_bottom_of_stack
#define Caml_last_return_address caml_last_return_address
#define Caml_gc_regs caml_gc_regs
#define Caml_exception_pointer caml_exception_pointer
#define Caml_required_size caml_required_size
#define Caml_alloc caml_alloc
#define Caml_call_gc caml_call_gc
#define Garbage_collection garbage_collection
#define Caml_c_call caml_c_call
#define Caml_start_program caml_start_program
#define Caml_program caml_program
#define Raise_caml_exception raise_caml_exception
#define Callback_exn callback_exn
#define Callback2_exn callback2_exn
#define Callback3_exn callback3_exn
#define Caml_apply2 caml_apply2
#define Caml_apply3 caml_apply3
#define Mlraise mlraise
#define System_frametable system_frametable
#endif
#define Exn_ptr %l5
#define Alloc_ptr %l6
#define Alloc_limit %l7
#define Load(symb,reg) sethi %hi(symb), %g1; ld [%g1 + %lo(symb)], reg
#define Store(reg,symb) sethi %hi(symb), %g1; st reg, [%g1 + %lo(symb)]
#define Address(symb,reg) sethi %hi(symb), reg; or reg, %lo(symb), reg
/* Allocation functions */
.text
.global Caml_alloc
.global Caml_call_gc
/* Required size in %g2 */
Caml_alloc:
ld [Alloc_limit], %g1
sub Alloc_ptr, %g2, Alloc_ptr
cmp Alloc_ptr, %g1
blu Caml_call_gc
nop
retl
nop
/* Required size in %g2 */
Caml_call_gc:
/* Save %g2 (required size) */
Store(%g2, Caml_required_size)
/* Save exception pointer if GC raises */
Store(Exn_ptr, Caml_exception_pointer)
/* Save current allocation pointer for debugging purposes */
Store(Alloc_ptr, Young_ptr)
/* Record lowest stack address */
Store(%sp, Caml_bottom_of_stack)
/* Record last return address */
Store(%o7, Caml_last_return_address)
/* Allocate space on stack for caml_context structure and float regs */
sub %sp, 20*4 + 15*8, %sp
/* Save int regs on stack and save it into caml_gc_regs */
add %sp, 96 + 15*8, %g2
std %o0, [%g2]
std %o2, [%g2 + 0x8]
std %o4, [%g2 + 0x10]
std %i0, [%g2 + 0x18]
std %i2, [%g2 + 0x20]
std %i4, [%g2 + 0x28]
std %l0, [%g2 + 0x30]
std %l2, [%g2 + 0x38]
st %l4, [%g2 + 0x40]
st %g3, [%g2 + 0x44]
st %g4, [%g2 + 0x48]
Store(%g2, Caml_gc_regs)
/* Save the floating-point registers */
add %sp, 96, %g1
std %f0, [%g1]
std %f2, [%g1 + 0x8]
std %f4, [%g1 + 0x10]
std %f6, [%g1 + 0x18]
std %f8, [%g1 + 0x20]
std %f10, [%g1 + 0x28]
std %f12, [%g1 + 0x30]
std %f14, [%g1 + 0x38]
std %f16, [%g1 + 0x40]
std %f18, [%g1 + 0x48]
std %f20, [%g1 + 0x50]
std %f22, [%g1 + 0x58]
std %f24, [%g1 + 0x60]
std %f26, [%g1 + 0x68]
std %f28, [%g1 + 0x70]
/* Call the garbage collector */
call Garbage_collection
nop
/* Restore all regs used by the code generator */
add %sp, 96 + 15*8, %g2
ldd [%g2], %o0
ldd [%g2 + 0x8], %o2
ldd [%g2 + 0x10], %o4
ldd [%g2 + 0x18], %i0
ldd [%g2 + 0x20], %i2
ldd [%g2 + 0x28], %i4
ldd [%g2 + 0x30], %l0
ldd [%g2 + 0x38], %l2
ld [%g2 + 0x40], %l4
ld [%g2 + 0x44], %g3
ld [%g2 + 0x48], %g4
add %sp, 96, %g1
ldd [%g1], %f0
ldd [%g1 + 0x8], %f2
ldd [%g1 + 0x10], %f4
ldd [%g1 + 0x18], %f6
ldd [%g1 + 0x20], %f8
ldd [%g1 + 0x28], %f10
ldd [%g1 + 0x30], %f12
ldd [%g1 + 0x38], %f14
ldd [%g1 + 0x40], %f16
ldd [%g1 + 0x48], %f18
ldd [%g1 + 0x50], %f20
ldd [%g1 + 0x58], %f22
ldd [%g1 + 0x60], %f24
ldd [%g1 + 0x68], %f26
ldd [%g1 + 0x70], %f28
/* Reload alloc ptr */
Load(Young_ptr, Alloc_ptr)
/* Allocate space for block */
Load(Caml_required_size, %g2)
sub Alloc_ptr, %g2, Alloc_ptr
/* Return to caller */
Load(Caml_last_return_address, %o7)
retl
add %sp, 20*4 + 15*8, %sp /* in delay slot */
/* Call a C function from Caml */
.global Caml_c_call
/* Function to call is in %g2 */
Caml_c_call:
/* Record lowest stack address and return address */
Store(%sp, Caml_bottom_of_stack)
Store(%o7, Caml_last_return_address)
/* Save the exception handler and alloc pointer */
Store(Exn_ptr, Caml_exception_pointer)
sethi %hi(Young_ptr), %g1
/* Call the C function */
call %g2
st Alloc_ptr, [%g1 + %lo(Young_ptr)] /* in delay slot */
/* Reload return address */
Load(Caml_last_return_address, %o7)
/* Reload alloc pointer */
sethi %hi(Young_ptr), %g1
/* Return to caller */
retl
ld [%g1 + %lo(Young_ptr)], Alloc_ptr /* in delay slot */
/* Start the Caml program */
.global Caml_start_program
Caml_start_program:
/* Save all callee-save registers */
save %sp, -96, %sp
/* Address of code to call */
Address(Caml_program, %l2)
/* Code shared with callback* */
L108:
/* Set up a callback link on the stack. */
sub %sp, 16, %sp
Load(Caml_bottom_of_stack, %l0)
Load(Caml_last_return_address, %l1)
Load(Caml_gc_regs, %l3)
std %l0, [%sp + 96]
st %l3, [%sp + 104]
/* Set up a trap frame to catch exceptions escaping the Caml code */
call L111
nop
b L110
nop
L111: sub %sp, 8, %sp
Load(Caml_exception_pointer, Exn_ptr)
st %o7, [%sp + 96]
st Exn_ptr, [%sp + 100]
mov %sp, Exn_ptr
/* Reload allocation pointers */
Load(Young_ptr, Alloc_ptr)
Address(Young_limit, Alloc_limit)
/* Call the Caml code */
L109: call %l2
nop
/* Pop trap frame and restore caml_exception_pointer */
ld [%sp + 100], Exn_ptr
add %sp, 8, %sp
Store(Exn_ptr, Caml_exception_pointer)
/* Pop callback link, restoring the global variables */
L112: ldd [%sp + 96], %l0
ld [%sp + 104], %l2
Store(%l0, Caml_bottom_of_stack)
Store(%l1, Caml_last_return_address)
Store(%l2, Caml_gc_regs)
add %sp, 16, %sp
/* Save allocation pointer */
Store(Alloc_ptr, Young_ptr)
/* Move result where the C function expects it */
mov %o0, %i0 /* %i0 will become %o0 after restore */
/* Reload callee-save registers and return */
ret
restore
L110:
/* The trap handler */
Store(Exn_ptr, Caml_exception_pointer)
/* Encode exception bucket as an exception result */
or %o0, 2, %o0
b L112
nop
/* Raise an exception from C */
.global Raise_caml_exception
Raise_caml_exception:
/* Save exception bucket in a register outside the reg windows */
mov %o0, %g2
/* Load exception pointer in a register outside the reg windows */
Load(Caml_exception_pointer, %g3)
/* Pop some frames until the trap pointer is in the current frame. */
cmp %g3, %fp
blt L107 /* if Exn_ptr < %fp, over */
nop
L106: restore
cmp %fp, %g3 /* if %fp <= Exn_ptr, loop */
ble L106
nop
L107:
/* Reload allocation registers */
Load(Young_ptr, Alloc_ptr)
Address(Young_limit, Alloc_limit)
/* Branch to exception handler */
mov %g3, %sp
ld [%sp + 96], %g1
ld [%sp + 100], Exn_ptr
add %sp, 8, %sp
jmp %g1 + 8
/* Restore bucket, in delay slot */
mov %g2, %o0
/* Callbacks C -> ML */
.global Callback_exn
Callback_exn:
/* Save callee-save registers and return address */
save %sp, -96, %sp
/* Initial shuffling of arguments */
mov %i0, %g1
mov %i1, %i0 /* first arg */
mov %g1, %i1 /* environment */
b L108
ld [%g1], %l2 /* code pointer */
.global Callback2_exn
Callback2_exn:
/* Save callee-save registers and return address */
save %sp, -104, %sp
/* Initial shuffling of arguments */
mov %i0, %g1
mov %i1, %i0 /* first arg */
mov %i2, %i1 /* second arg */
mov %g1, %i2 /* environment */
sethi %hi(Caml_apply2), %l2
b L108
or %l2, %lo(Caml_apply2), %l2
.global Callback3_exn
Callback3_exn:
/* Save callee-save registers and return address */
save %sp, -104, %sp
/* Initial shuffling of arguments */
mov %i0, %g1
mov %i1, %i0 /* first arg */
mov %i2, %i1 /* second arg */
mov %i3, %i2 /* third arg */
mov %g1, %i3 /* environment */
sethi %hi(Caml_apply3), %l2
b L108
or %l2, %lo(Caml_apply3), %l2
.data
.global System_frametable
System_frametable:
.word 1 /* one descriptor */
.word L109 /* return address into callback */
.half -1 /* negative frame size => use callback link */
.half 0 /* no roots */
|
