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|
/***********************************************************************/
/* */
/* Objective Caml */
/* */
/* Xavier Leroy, projet Cristal, INRIA Rocquencourt */
/* */
/* Copyright 2003 Institut National de Recherche en Informatique et */
/* en Automatique. All rights reserved. This file is distributed */
/* under the terms of the GNU Library General Public License, with */
/* the special exception on linking described in file ../LICENSE. */
/* */
/***********************************************************************/
/* $Id$ */
/* Asm part of the runtime system, AMD64 processor */
/* Must be preprocessed by cpp */
/* PIC mode support based on contribution by Paul Stravers (see PR#4795) */
#ifdef SYS_macosx
#define G(r) _##r
#define GREL(r) _##r@GOTPCREL
#define GCALL(r) _##r
#define FUNCTION_ALIGN 2
#define EIGHT_ALIGN 3
#define SIXTEEN_ALIGN 4
#define FUNCTION(name) \
.globl name; \
.align FUNCTION_ALIGN; \
name:
#else
#define G(r) r
#define GREL(r) r@GOTPCREL
#define GCALL(r) r@PLT
#define FUNCTION_ALIGN 4
#define EIGHT_ALIGN 8
#define SIXTEEN_ALIGN 16
#define FUNCTION(name) \
.globl name; \
.type name,@function; \
.align FUNCTION_ALIGN; \
name:
#endif
#ifdef __PIC__
/* Position-independent operations on global variables. */
/* Store [srcreg] in global [dstlabel]. Clobbers %r11. */
#define STORE_VAR(srcreg,dstlabel) \
movq GREL(dstlabel)(%rip), %r11 ; \
movq srcreg, (%r11)
/* Load global [srclabel] in register [dstreg]. Clobbers %r11. */
#define LOAD_VAR(srclabel,dstreg) \
movq GREL(srclabel)(%rip), %r11 ; \
movq (%r11), dstreg
/* Compare global [label] with register [reg]. Clobbers %rax. */
#define CMP_VAR(label,reg) \
movq GREL(label)(%rip), %rax ; \
cmpq (%rax), reg
/* Test 32-bit global [label] against mask [imm]. Clobbers %r11. */
#define TESTL_VAR(imm,label) \
movq GREL(label)(%rip), %r11 ; \
testl imm, (%r11)
/* Push global [label] on stack. Clobbers %r11. */
#define PUSH_VAR(srclabel) \
movq GREL(srclabel)(%rip), %r11 ; \
pushq (%r11)
/* Pop global [label] off stack. Clobbers %r11. */
#define POP_VAR(dstlabel) \
movq GREL(dstlabel)(%rip), %r11 ; \
popq (%r11)
/* Record lowest stack address and return address. Clobbers %rax. */
#define RECORD_STACK_FRAME(OFFSET) \
pushq %r11 ; \
movq 8+OFFSET(%rsp), %rax ; \
STORE_VAR(%rax,caml_last_return_address) ; \
leaq 16+OFFSET(%rsp), %rax ; \
STORE_VAR(%rax,caml_bottom_of_stack) ; \
popq %r11
#else
/* Non-PIC operations on global variables. Slightly faster. */
#define STORE_VAR(srcreg,dstlabel) \
movq srcreg, G(dstlabel)(%rip)
#define LOAD_VAR(srclabel,dstreg) \
movq G(srclabel)(%rip), dstreg
#define CMP_VAR(label,reg) \
cmpq G(label)(%rip), %r15
#define TESTL_VAR(imm,label) \
testl imm, G(label)(%rip)
#define PUSH_VAR(srclabel) \
pushq G(srclabel)(%rip)
#define POP_VAR(dstlabel) \
popq G(dstlabel)(%rip)
#define RECORD_STACK_FRAME(OFFSET) \
movq OFFSET(%rsp), %rax ; \
STORE_VAR(%rax,caml_last_return_address) ; \
leaq 8+OFFSET(%rsp), %rax ; \
STORE_VAR(%rax,caml_bottom_of_stack)
#endif
.text
/* Allocation */
FUNCTION(G(caml_call_gc))
RECORD_STACK_FRAME(0)
.Lcaml_call_gc:
/* Build array of registers, save it into caml_gc_regs */
pushq %r13
pushq %r12
pushq %rbp
pushq %r11
pushq %r10
pushq %r9
pushq %r8
pushq %rcx
pushq %rdx
pushq %rsi
pushq %rdi
pushq %rbx
pushq %rax
STORE_VAR(%rsp, caml_gc_regs)
/* Save caml_young_ptr, caml_exception_pointer */
STORE_VAR(%r15, caml_young_ptr)
STORE_VAR(%r14, caml_exception_pointer)
/* Save floating-point registers */
subq $(16*8), %rsp
movsd %xmm0, 0*8(%rsp)
movsd %xmm1, 1*8(%rsp)
movsd %xmm2, 2*8(%rsp)
movsd %xmm3, 3*8(%rsp)
movsd %xmm4, 4*8(%rsp)
movsd %xmm5, 5*8(%rsp)
movsd %xmm6, 6*8(%rsp)
movsd %xmm7, 7*8(%rsp)
movsd %xmm8, 8*8(%rsp)
movsd %xmm9, 9*8(%rsp)
movsd %xmm10, 10*8(%rsp)
movsd %xmm11, 11*8(%rsp)
movsd %xmm12, 12*8(%rsp)
movsd %xmm13, 13*8(%rsp)
movsd %xmm14, 14*8(%rsp)
movsd %xmm15, 15*8(%rsp)
/* Call the garbage collector */
call GCALL(caml_garbage_collection)
/* Restore caml_young_ptr, caml_exception_pointer */
LOAD_VAR(caml_young_ptr, %r15)
LOAD_VAR(caml_exception_pointer, %r14)
/* Restore all regs used by the code generator */
movsd 0*8(%rsp), %xmm0
movsd 1*8(%rsp), %xmm1
movsd 2*8(%rsp), %xmm2
movsd 3*8(%rsp), %xmm3
movsd 4*8(%rsp), %xmm4
movsd 5*8(%rsp), %xmm5
movsd 6*8(%rsp), %xmm6
movsd 7*8(%rsp), %xmm7
movsd 8*8(%rsp), %xmm8
movsd 9*8(%rsp), %xmm9
movsd 10*8(%rsp), %xmm10
movsd 11*8(%rsp), %xmm11
movsd 12*8(%rsp), %xmm12
movsd 13*8(%rsp), %xmm13
movsd 14*8(%rsp), %xmm14
movsd 15*8(%rsp), %xmm15
addq $(16*8), %rsp
popq %rax
popq %rbx
popq %rdi
popq %rsi
popq %rdx
popq %rcx
popq %r8
popq %r9
popq %r10
popq %r11
popq %rbp
popq %r12
popq %r13
/* Return to caller */
ret
FUNCTION(G(caml_alloc1))
.Lcaml_alloc1:
subq $16, %r15
CMP_VAR(caml_young_limit, %r15)
jb .L100
ret
.L100:
RECORD_STACK_FRAME(0)
subq $8, %rsp
call .Lcaml_call_gc
addq $8, %rsp
jmp .Lcaml_alloc1
FUNCTION(G(caml_alloc2))
.Lcaml_alloc2:
subq $24, %r15
CMP_VAR(caml_young_limit, %r15)
jb .L101
ret
.L101:
RECORD_STACK_FRAME(0)
subq $8, %rsp
call .Lcaml_call_gc
addq $8, %rsp
jmp .Lcaml_alloc2
FUNCTION(G(caml_alloc3))
.Lcaml_alloc3:
subq $32, %r15
CMP_VAR(caml_young_limit, %r15)
jb .L102
ret
.L102:
RECORD_STACK_FRAME(0)
subq $8, %rsp
call .Lcaml_call_gc
addq $8, %rsp
jmp .Lcaml_alloc3
FUNCTION(G(caml_allocN))
.Lcaml_allocN:
pushq %rax /* save desired size */
subq %rax, %r15
CMP_VAR(caml_young_limit, %r15)
jb .L103
addq $8, %rsp /* drop desired size */
ret
.L103:
RECORD_STACK_FRAME(8)
call .Lcaml_call_gc
popq %rax /* recover desired size */
jmp .Lcaml_allocN
/* Call a C function from Caml */
FUNCTION(G(caml_c_call))
.Lcaml_c_call:
/* Record lowest stack address and return address */
popq %r12
STORE_VAR(%r12, caml_last_return_address)
STORE_VAR(%rsp, caml_bottom_of_stack)
/* Make the exception handler and alloc ptr available to the C code */
STORE_VAR(%r15, caml_young_ptr)
STORE_VAR(%r14, caml_exception_pointer)
/* Call the function (address in %rax) */
call *%rax
/* Reload alloc ptr */
LOAD_VAR(caml_young_ptr, %r15)
/* Return to caller */
pushq %r12
ret
/* Start the Caml program */
FUNCTION(G(caml_start_program))
/* Save callee-save registers */
pushq %rbx
pushq %rbp
pushq %r12
pushq %r13
pushq %r14
pushq %r15
subq $8, %rsp /* stack 16-aligned */
/* Initial entry point is G(caml_program) */
leaq GCALL(caml_program)(%rip), %r12
/* Common code for caml_start_program and caml_callback* */
.Lcaml_start_program:
/* Build a callback link */
subq $8, %rsp /* stack 16-aligned */
PUSH_VAR(caml_gc_regs)
PUSH_VAR(caml_last_return_address)
PUSH_VAR(caml_bottom_of_stack)
/* Setup alloc ptr and exception ptr */
LOAD_VAR(caml_young_ptr, %r15)
LOAD_VAR(caml_exception_pointer, %r14)
/* Build an exception handler */
lea .L108(%rip), %r13
pushq %r13
pushq %r14
movq %rsp, %r14
/* Call the Caml code */
call *%r12
.L107:
/* Pop the exception handler */
popq %r14
popq %r12 /* dummy register */
.L109:
/* Update alloc ptr and exception ptr */
STORE_VAR(%r15,caml_young_ptr)
STORE_VAR(%r14,caml_exception_pointer)
/* Pop the callback link, restoring the global variables */
POP_VAR(caml_bottom_of_stack)
POP_VAR(caml_last_return_address)
POP_VAR(caml_gc_regs)
addq $8, %rsp
/* Restore callee-save registers. */
addq $8, %rsp
popq %r15
popq %r14
popq %r13
popq %r12
popq %rbp
popq %rbx
/* Return to caller. */
ret
.L108:
/* Exception handler*/
/* Mark the bucket as an exception result and return it */
orq $2, %rax
jmp .L109
/* Raise an exception from Caml */
FUNCTION(G(caml_raise_exn))
TESTL_VAR($1, caml_backtrace_active)
jne .L110
movq %r14, %rsp
popq %r14
ret
.L110:
movq %rax, %r12 /* Save exception bucket */
movq %rax, %rdi /* arg 1: exception bucket */
movq 0(%rsp), %rsi /* arg 2: pc of raise */
leaq 8(%rsp), %rdx /* arg 3: sp of raise */
movq %r14, %rcx /* arg 4: sp of handler */
call GCALL(caml_stash_backtrace)
movq %r12, %rax /* Recover exception bucket */
movq %r14, %rsp
popq %r14
ret
/* Raise an exception from C */
FUNCTION(G(caml_raise_exception))
TESTL_VAR($1, caml_backtrace_active)
jne .L111
movq %rdi, %rax
LOAD_VAR(caml_exception_pointer, %rsp) /* Cut stack */
popq %r14 /* Recover previous exception handler */
LOAD_VAR(caml_young_ptr, %r15) /* Reload alloc ptr */
ret
.L111:
movq %rdi, %r12 /* Save exception bucket */
/* arg 1: exception bucket */
LOAD_VAR(caml_last_return_address,%rsi) /* arg 2: pc of raise */
LOAD_VAR(caml_bottom_of_stack,%rdx) /* arg 3: sp of raise */
LOAD_VAR(caml_exception_pointer,%rcx) /* arg 4: sp of handler */
call GCALL(caml_stash_backtrace)
movq %r12, %rax /* Recover exception bucket */
LOAD_VAR(caml_exception_pointer,%rsp)
popq %r14 /* Recover previous exception handler */
LOAD_VAR(caml_young_ptr,%r15) /* Reload alloc ptr */
ret
/* Callback from C to Caml */
FUNCTION(G(caml_callback_exn))
/* Save callee-save registers */
pushq %rbx
pushq %rbp
pushq %r12
pushq %r13
pushq %r14
pushq %r15
subq $8, %rsp /* stack 16-aligned */
/* Initial loading of arguments */
movq %rdi, %rbx /* closure */
movq %rsi, %rax /* argument */
movq 0(%rbx), %r12 /* code pointer */
jmp .Lcaml_start_program
FUNCTION(G(caml_callback2_exn))
/* Save callee-save registers */
pushq %rbx
pushq %rbp
pushq %r12
pushq %r13
pushq %r14
pushq %r15
subq $8, %rsp /* stack 16-aligned */
/* Initial loading of arguments */
/* closure stays in %rdi */
movq %rsi, %rax /* first argument */
movq %rdx, %rbx /* second argument */
leaq GCALL(caml_apply2)(%rip), %r12 /* code pointer */
jmp .Lcaml_start_program
FUNCTION(G(caml_callback3_exn))
/* Save callee-save registers */
pushq %rbx
pushq %rbp
pushq %r12
pushq %r13
pushq %r14
pushq %r15
subq $8, %rsp /* stack 16-aligned */
/* Initial loading of arguments */
movq %rsi, %rax /* first argument */
movq %rdx, %rbx /* second argument */
movq %rdi, %rsi /* closure */
movq %rcx, %rdi /* third argument */
leaq GCALL(caml_apply3)(%rip), %r12 /* code pointer */
jmp .Lcaml_start_program
FUNCTION(G(caml_ml_array_bound_error))
leaq GCALL(caml_array_bound_error)(%rip), %rax
jmp .Lcaml_c_call
.data
.globl G(caml_system__frametable)
.align EIGHT_ALIGN
G(caml_system__frametable):
.quad 1 /* one descriptor */
.quad .L107 /* return address into callback */
.value -1 /* negative frame size => use callback link */
.value 0 /* no roots here */
.align EIGHT_ALIGN
#ifdef SYS_macosx
.literal16
#else
.section .rodata.cst8,"a",@progbits
#endif
.globl G(caml_negf_mask)
.align SIXTEEN_ALIGN
G(caml_negf_mask):
.quad 0x8000000000000000, 0
.globl G(caml_absf_mask)
.align SIXTEEN_ALIGN
G(caml_absf_mask):
.quad 0x7FFFFFFFFFFFFFFF, 0xFFFFFFFFFFFFFFFF
#if defined(SYS_linux)
/* Mark stack as non-executable, PR#4564 */
.section .note.GNU-stack,"",%progbits
#endif
|
