X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fruntime%2Fx86-64-assem.S;h=2e8e1c7667343a2a8e11240543b712b25aa8cfe4;hb=78c2361d1d9e680230df412f4d1489725781c6d2;hp=96429789ecf3bad17a5987f1c1c7c89ab4133a00;hpb=1b83f8f5a9c75b01993eadbcd564a4dd2c349b5e;p=sbcl.git diff --git a/src/runtime/x86-64-assem.S b/src/runtime/x86-64-assem.S index 9642978..2e8e1c7 100644 --- a/src/runtime/x86-64-assem.S +++ b/src/runtime/x86-64-assem.S @@ -14,9 +14,11 @@ */ #define LANGUAGE_ASSEMBLY +#include "genesis/config.h" #include "validate.h" #include "sbcl.h" #include "genesis/closure.h" +#include "genesis/funcallable-instance.h" #include "genesis/fdefn.h" #include "genesis/static-symbols.h" #include "genesis/symbol.h" @@ -42,9 +44,52 @@ #define align_16byte 4 #endif +/* + * The assembler used for win32 doesn't like .type or .size directives, + * so we want to conditionally kill them out. So let's wrap them in macros + * that are defined to be no-ops on win32. Hopefully this still works on + * other platforms. + */ +#if !defined(LISP_FEATURE_WIN32) && !defined(LISP_FEATURE_DARWIN) +#define TYPE(name) .type name,@function +#define SIZE(name) .size name,.-name +#define DOLLAR(name) $(name) +#else +#define TYPE(name) +#define SIZE(name) +#endif + +/* + * x86/darwin (as of MacOS X 10.4.5) doesn't reliably fire signal + * handlers (SIGTRAP or Mach exception handlers) for 0xCC, wo we have + * to use ud2 instead. ud2 is an undefined opcode, #x0b0f, or + * 0F 0B in low-endian notation, that causes SIGILL to fire. We check + * for this instruction in the SIGILL handler and if we see it, we + * advance the EIP by two bytes to skip over ud2 instruction and + * call sigtrap_handler. */ +#if defined(LISP_FEATURE_DARWIN) +#define TRAP ud2 +#else +#define TRAP int3 +#endif + +/* + * More Apple assembler hacks + */ + +#if defined(LISP_FEATURE_DARWIN) +/* global symbol x86-64 sym(%rip) hack:*/ +#define GSYM(name) name(%rip) +#define END() +#else +#define GSYM(name) $name +#define END() .end +#endif + + .text - .global GNAME(foreign_function_call_active) - .global GNAME(all_threads) + .globl GNAME(all_threads) + /* From lower to higher-numbered addresses, the stack contains @@ -57,9 +102,12 @@ */ .text .align align_16byte,0x90 - .global GNAME(call_into_c) - .type GNAME(call_into_c),@function + .globl GNAME(call_into_c) + TYPE(GNAME(call_into_c)) GNAME(call_into_c): + /* ABI requires that the direction flag be clear on function + * entry and exit. */ + cld push %rbp # Save old frame pointer. mov %rsp,%rbp # Establish new frame. @@ -76,12 +124,12 @@ GNAME(call_into_c): mov %rbp,%rsp pop %rbp ret - .size GNAME(call_into_c), . - GNAME(call_into_c) + SIZE(GNAME(call_into_c)) .text - .global GNAME(call_into_lisp_first_time) - .type GNAME(call_into_lisp_first_time),@function + .globl GNAME(call_into_lisp_first_time) + TYPE(GNAME(call_into_lisp_first_time)) /* The *ALIEN-STACK* pointer is set up on the first call_into_lisp when * the stack changes. We don't worry too much about saving registers @@ -92,17 +140,21 @@ GNAME(call_into_c): GNAME(call_into_lisp_first_time): push %rbp # Save old frame pointer. mov %rsp,%rbp # Establish new frame. - mov %rsp,ALIEN_STACK + SYMBOL_VALUE_OFFSET - mov GNAME(all_threads),%rax - mov THREAD_CONTROL_STACK_START_OFFSET(%rax) ,%rsp + mov %rsp,ALIEN_STACK + SYMBOL_VALUE_OFFSET +#if defined(LISP_FEATURE_DARWIN) + movq GSYM(GNAME(all_threads)),%rax +#else + movq GNAME(all_threads),%rax +#endif + mov THREAD_CONTROL_STACK_START_OFFSET(%rax) ,%rsp /* don't think too hard about what happens if we get interrupted * here */ - add $THREAD_CONTROL_STACK_SIZE-16,%rsp + add $(THREAD_CONTROL_STACK_SIZE)-16,%rsp jmp Lstack .text - .global GNAME(call_into_lisp) - .type GNAME(call_into_lisp),@function + .globl GNAME(call_into_lisp) + TYPE(GNAME(call_into_lisp)) /* * amd64 calling convention: C expects that @@ -117,20 +169,26 @@ GNAME(call_into_lisp): mov %rsp,%rbp # Establish new frame. Lstack: /* FIXME x86 saves FPU state here */ - push %rbx - push %r12 - push %r13 - push %r14 - push %r15 - + push %rbx # these regs are callee-saved according to C + push %r12 # so must be preserved and restored when + push %r13 # the lisp function returns + push %r14 # + push %r15 # mov %rsp,%rbx # remember current stack push %rbx # Save entry stack on (maybe) new stack. - /* Establish Lisp args. */ - mov %rdi,%rax # lexenv? - mov %rsi,%rbx # address of arg vec - mov %rdx,%rcx # num args + push %rdi # args from C + push %rsi # + push %rdx # +#ifdef LISP_FEATURE_SB_THREAD + mov specials,%rdi + call pthread_getspecific + mov %rax,%r12 +#endif + pop %rcx # num args + pop %rbx # arg vector + pop %rax # function ptr/lexenv xor %rdx,%rdx # clear any descriptor registers xor %rdi,%rdi # that we can't be sure we'll @@ -160,8 +218,9 @@ Lcall: /* If the function returned multiple values, it will return to this point. Lose them */ + jnc LsingleValue mov %rbx, %rsp - /* A singled value function returns here */ +LsingleValue: /* Restore the stack, in case there was a stack change. */ pop %rsp # c-sp @@ -173,54 +232,58 @@ Lcall: pop %r12 pop %rbx + /* ABI requires that the direction flag be clear on function + * entry and exit. */ + cld + /* FIXME Restore the NPX state. */ /* return value is already in rax where lisp expects it */ leave ret - .size GNAME(call_into_lisp), . - GNAME(call_into_lisp) + SIZE(GNAME(call_into_lisp)) /* support for saving and restoring the NPX state from C */ .text - .global GNAME(fpu_save) - .type GNAME(fpu_save),@function + .globl GNAME(fpu_save) + TYPE(GNAME(fpu_save)) .align 2,0x90 GNAME(fpu_save): mov 4(%rsp),%rax fnsave (%rax) # Save the NPX state. (resets NPX) ret - .size GNAME(fpu_save),.-GNAME(fpu_save) + SIZE(GNAME(fpu_save)) - .global GNAME(fpu_restore) - .type GNAME(fpu_restore),@function + .globl GNAME(fpu_restore) + TYPE(GNAME(fpu_restore)) .align 2,0x90 GNAME(fpu_restore): mov 4(%rsp),%rax frstor (%rax) # Restore the NPX state. ret - .size GNAME(fpu_restore),.-GNAME(fpu_restore) + SIZE(GNAME(fpu_restore)) /* * the undefined-function trampoline */ .text .align align_8byte,0x90 - .global GNAME(undefined_tramp) - .type GNAME(undefined_tramp),@function + .globl GNAME(undefined_tramp) + TYPE(GNAME(undefined_tramp)) GNAME(undefined_tramp): - int3 + TRAP .byte trap_Error .byte 2 .byte UNDEFINED_FUN_ERROR .byte sc_DescriptorReg # eax in the Descriptor-reg SC ret - .size GNAME(undefined_tramp), .-GNAME(undefined_tramp) + SIZE(GNAME(undefined_tramp)) .text .align align_8byte,0x90 - .global GNAME(alloc_tramp) - .type GNAME(alloc_tramp),@function + .globl GNAME(alloc_tramp) + TYPE(GNAME(alloc_tramp)) GNAME(alloc_tramp): push %rbp # Save old frame pointer. mov %rsp,%rbp # Establish new frame. @@ -234,7 +297,7 @@ GNAME(alloc_tramp): push %r10 push %r11 mov 16(%rbp),%rdi - call alloc + call GNAME(alloc) mov %rax,16(%rbp) pop %r11 pop %r10 @@ -247,7 +310,7 @@ GNAME(alloc_tramp): pop %rax pop %rbp ret - .size GNAME(alloc_tramp),.-GNAME(alloc_tramp) + SIZE(GNAME(alloc_tramp)) /* @@ -255,8 +318,8 @@ GNAME(alloc_tramp): */ .text .align align_8byte,0x90 - .global GNAME(closure_tramp) - .type GNAME(closure_tramp),@function + .globl GNAME(closure_tramp) + TYPE(GNAME(closure_tramp)) GNAME(closure_tramp): mov FDEFN_FUN_OFFSET(%rax),%rax /* FIXME: The '*' after "jmp" in the next line is from PVE's @@ -266,53 +329,67 @@ GNAME(closure_tramp): * right. It would be good to find a way to force the flow of * control through here to test it. */ jmp *CLOSURE_FUN_OFFSET(%rax) - .size GNAME(closure_tramp), .-GNAME(closure_tramp) + SIZE(GNAME(closure_tramp)) + .text + .align align_8byte,0x90 + .globl GNAME(funcallable_instance_tramp) +#if !defined(LISP_FEATURE_DARWIN) + .type GNAME(funcallable_instance_tramp),@function +#endif + GNAME(funcallable_instance_tramp): + mov FUNCALLABLE_INSTANCE_FUNCTION_OFFSET(%rax),%rax + /* KLUDGE: on this platform, whatever kind of function is in %rax + * now, the first word of it contains the address to jump to. */ + jmp *CLOSURE_FUN_OFFSET(%rax) +#if !defined(LISP_FEATURE_DARWIN) + .size GNAME(funcallable_instance_tramp), .-GNAME(funcallable_instance_tramp) +#endif /* * fun-end breakpoint magic */ .text - .global GNAME(fun_end_breakpoint_guts) + .globl GNAME(fun_end_breakpoint_guts) .align align_8byte GNAME(fun_end_breakpoint_guts): /* Multiple Value return */ - jmp multiple_value_return - /* the above jmp is only 2 bytes long, we need to add a nop for - * padding since the single value return convention jumps to original - * return address + 3 bytes */ - nop + jc multiple_value_return /* Single value return: The eventual return will now use the multiple values return convention but with a return values count of one. */ mov %rsp,%rbx # Setup ebx - the ofp. sub $8,%rsp # Allocate one stack slot for the return value mov $8,%rcx # Setup ecx for one return value. +#if defined(LISP_FEATURE_DARWIN) + mov GSYM(NIL),%rdi # default second value + mov GSYM(NIL),%rsi # default third value +#else mov $NIL,%rdi # default second value mov $NIL,%rsi # default third value - +#endif multiple_value_return: - .global GNAME(fun_end_breakpoint_trap) + .globl GNAME(fun_end_breakpoint_trap) GNAME(fun_end_breakpoint_trap): - int3 + TRAP .byte trap_FunEndBreakpoint hlt # We should never return here. - .global GNAME(fun_end_breakpoint_end) + .globl GNAME(fun_end_breakpoint_end) GNAME(fun_end_breakpoint_end): - .global GNAME(do_pending_interrupt) - .type GNAME(do_pending_interrupt),@function + .globl GNAME(do_pending_interrupt) + TYPE(GNAME(do_pending_interrupt)) .align align_8byte,0x90 GNAME(do_pending_interrupt): - int3 + TRAP .byte trap_PendingInterrupt ret - .size GNAME(do_pending_interrupt),.-GNAME(do_pending_interrupt) + SIZE(GNAME(do_pending_interrupt)) .globl GNAME(post_signal_tramp) - .type GNAME(post_signal_tramp),@function + TYPE(GNAME(post_signal_tramp)) .align align_8byte,0x90 GNAME(post_signal_tramp): /* this is notionally the second half of a function whose first half @@ -328,15 +405,54 @@ GNAME(post_signal_tramp): popq %r8 popq %rdi popq %rsi - addq $8, %rsp - popq %rsp - popq %rdx + /* skip RBP and RSP */ popq %rbx + popq %rdx popq %rcx popq %rax popfq leave ret - .size GNAME(post_signal_tramp),.-GNAME(post_signal_tramp) + SIZE(GNAME(post_signal_tramp)) - .end + .text + .align align_8byte,0x90 + .globl GNAME(fast_bzero) + TYPE(GNAME(fast_bzero)) + +GNAME(fast_bzero): + /* A fast routine for zero-filling blocks of memory that are + * guaranteed to start and end at a 4096-byte aligned address. + */ + shr $6, %rsi /* Amount of 64-byte blocks to copy */ + jz Lend /* If none, stop */ + mov %rsi, %rcx /* Save start address */ + movups %xmm7, -16(%rsp) /* Save XMM register */ + xorps %xmm7, %xmm7 /* Zero the XMM register */ + jmp Lloop + .align align_16byte +Lloop: + + /* Copy the 16 zeroes from xmm7 to memory, 4 times. MOVNTDQ is the + * non-caching double-quadword moving variant, i.e. the memory areas + * we're touching are not fetched into the L1 cache, since we're just + * going to overwrite the memory soon anyway. + */ + movntdq %xmm7, 0(%rdi) + movntdq %xmm7, 16(%rdi) + movntdq %xmm7, 32(%rdi) + movntdq %xmm7, 48(%rdi) + + add $64, %rdi /* Advance pointer */ + dec %rsi /* Decrement 64-byte block count */ + jnz Lloop + mfence /* Ensure that the writes are globally visible, since + * MOVNTDQ is weakly ordered */ + movups -16(%rsp), %xmm7 /* Restore the XMM register */ + prefetcht0 0(%rcx) /* Prefetch the start of the block into cache, + * since it's likely to be used immediately. */ +Lend: + ret + SIZE(GNAME(fast_bzero)) + + END()