X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fruntime%2Fx86-64-assem.S;h=b85639eb14e0f267e5baa0ea954ecbea5be3e5f9;hb=bf40ae88bc289fd765a33861cc4bc0853ed483ba;hp=02cbf26b55fed21c6ddda86f81fced0e0482810f;hpb=1a19da9ff50a45962fc2cf42c7a241a2ce97a364;p=sbcl.git diff --git a/src/runtime/x86-64-assem.S b/src/runtime/x86-64-assem.S index 02cbf26..b85639e 100644 --- a/src/runtime/x86-64-assem.S +++ b/src/runtime/x86-64-assem.S @@ -25,23 +25,25 @@ #include "genesis/thread.h" /* Minimize conditionalization for different OS naming schemes. */ -#if defined __linux__ || defined __FreeBSD__ /* (but *not* OpenBSD) */ +#if defined __linux__ || defined __FreeBSD__ || defined __OpenBSD__ || defined __NetBSD__ || defined __sun || defined _WIN64 #define GNAME(var) var #else #define GNAME(var) _##var #endif -/* Get the right type of alignment. Linux and FreeBSD (but not OpenBSD) +/* Get the right type of alignment. Linux, FreeBSD and OpenBSD * want alignment in bytes. */ -#if defined(__linux__) || defined(__FreeBSD__) +#if defined(__linux__) || defined(__FreeBSD__) || defined(__OpenBSD__) || defined __NetBSD__ || defined(__sun) || defined _WIN64 #define align_4byte 4 #define align_8byte 8 #define align_16byte 16 #define align_32byte 32 +#define align_page 32768 #else #define align_4byte 2 #define align_8byte 3 #define align_16byte 4 +#define align_page 15 #endif /* @@ -67,7 +69,7 @@ * 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) +#if defined(LISP_FEATURE_UD2_BREAKPOINTS) #define TRAP ud2 #else #define TRAP int3 @@ -128,8 +130,7 @@ GNAME(call_into_c): .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 +/* We don't worry too much about saving registers * here, because we never expect to return from the initial call to lisp * anyway */ @@ -137,16 +138,12 @@ 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 #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 + mov THREAD_CONTROL_STACK_END_OFFSET(%rax) ,%rsp jmp Lstack .text @@ -159,12 +156,23 @@ GNAME(call_into_lisp_first_time): * return values in rax rdx * callee saves rbp rbx r12-15 if it uses them */ - +#ifdef LISP_FEATURE_WIN32 +# define SUPPORT_FOMIT_FRAME_POINTER +#endif .align align_16byte,0x90 GNAME(call_into_lisp): +#ifdef SUPPORT_FOMIT_FRAME_POINTER + mov %rbp,%rax +#endif push %rbp # Save old frame pointer. mov %rsp,%rbp # Establish new frame. Lstack: +#ifdef SUPPORT_FOMIT_FRAME_POINTER + /* If called through call_into_lisp_first_time, %r15 becomes invalid + * here, but we will not return in that case. */ + push %r15 + mov %rax,%r15 +#endif /* FIXME x86 saves FPU state here */ push %rbx # these regs are callee-saved according to C push %r12 # so must be preserved and restored when @@ -179,6 +187,13 @@ Lstack: push %rsi # push %rdx # #ifdef LISP_FEATURE_SB_THREAD +# ifdef SUPPORT_FOMIT_FRAME_POINTER + mov (%rbp),%rcx + sub $32,%rsp + call GNAME(carry_frame_pointer) + add $32,%rsp + mov %rax,(%rbp) +# endif #ifdef LISP_FEATURE_GCC_TLS movq %fs:0, %rax movq GNAME(current_thread)@TPOFF(%rax), %r12 @@ -199,7 +214,7 @@ Lstack: xor %rdx,%rdx # clear any descriptor registers xor %rdi,%rdi # that we can't be sure we'll xor %rsi,%rsi # initialise properly. XX do r8-r15 too? - shl $3,%rcx # (fixnumize num-args) + shl $(N_FIXNUM_TAG_BITS),%rcx # (fixnumize num-args) cmp $0,%rcx je Ldone mov 0(%rbx),%rdx # arg0 @@ -214,10 +229,10 @@ Ldone: xor %rbx,%rbx # available /* Alloc new frame. */ - mov %rsp,%rbx # The current sp marks start of new frame. - push %rbp # fp in save location S0 - sub $16,%rsp # Ensure 3 slots are allocated, one above. - mov %rbx,%rbp # Switch to new frame. + push %rbp # Dummy for return address + push %rbp # fp in save location S1 + mov %rsp,%rbp # The current sp marks start of new frame. + sub $8,%rsp # Ensure 3 slots are allocated, two above. Lcall: call *CLOSURE_FUN_OFFSET(%rax) @@ -240,8 +255,14 @@ LsingleValue: /* FIXME Restore the NPX state. */ - /* return value is already in rax where lisp expects it */ + mov %rdx,%rax # c-val +#ifdef SUPPORT_FOMIT_FRAME_POINTER + mov %r15,%rbp # orig rbp + pop %r15 # orig r15 + add $8,%rsp # no need for saved (overridden) rbp +#else leave +#endif ret SIZE(GNAME(call_into_lisp)) @@ -249,19 +270,17 @@ LsingleValue: .text .globl GNAME(fpu_save) TYPE(GNAME(fpu_save)) - .align 2,0x90 + .align align_16byte,0x90 GNAME(fpu_save): - mov 4(%rsp),%rax - fnsave (%rax) # Save the NPX state. (resets NPX) + fnsave (%rdi) # Save the NPX state. (resets NPX) ret SIZE(GNAME(fpu_save)) .globl GNAME(fpu_restore) TYPE(GNAME(fpu_restore)) - .align 2,0x90 + .align align_16byte,0x90 GNAME(fpu_restore): - mov 4(%rsp),%rax - frstor (%rax) # Restore the NPX state. + frstor (%rdi) # Restore the NPX state. ret SIZE(GNAME(fpu_restore)) @@ -273,6 +292,7 @@ GNAME(fpu_restore): .globl GNAME(undefined_tramp) TYPE(GNAME(undefined_tramp)) GNAME(undefined_tramp): + pop 8(%rbp) # Save return PC for backtrace. TRAP .byte trap_Error .byte 2 @@ -281,14 +301,40 @@ GNAME(undefined_tramp): ret SIZE(GNAME(undefined_tramp)) +/* KLUDGE: FIND-ESCAPED-FRAME (SYS:SRC;CODE;DEBUG-INT.LISP) needs + * to know the name of the function immediately following the + * undefined-function trampoline. */ + +/* Our call-site does not take care of caller-saved xmm registers, so it + * falls to us spill them beforing hopping into C. + * + * We simply save all of them. + * + * (But for the sake of completeness, here is my understanding of the specs:) + * System V Microsoft + * argument passing xmm0-7 xmm0-3 + * caller-saved xmm8-15 xmm4-5 + * callee-saved - xmm6-15 + * + * --DFL */ + +#define stkxmmsave(n) movaps %xmm##n, n*16(%rsp) +#define stkxmmload(n) movaps n*16(%rsp), %xmm##n +#define map_all_xmm(op) \ + op(0);op(1);op(2);op(3);op(4);op(5);op(6);op(7); \ + op(8);op(9);op(10);op(11);op(12);op(13);op(14);op(15); .text .align align_16byte,0x90 .globl GNAME(alloc_tramp) TYPE(GNAME(alloc_tramp)) GNAME(alloc_tramp): + cld push %rbp # Save old frame pointer. mov %rsp,%rbp # Establish new frame. + and $-32,%rsp + sub $16*16,%rsp + map_all_xmm(stkxmmsave) push %rax push %rcx push %rdx @@ -298,10 +344,12 @@ GNAME(alloc_tramp): push %r9 push %r10 push %r11 - mov 16(%rbp),%rdi + push %r11 + mov 16(%rbp),%rdi call GNAME(alloc) mov %rax,16(%rbp) pop %r11 + pop %r11 pop %r10 pop %r9 pop %r8 @@ -310,6 +358,8 @@ GNAME(alloc_tramp): pop %rdx pop %rcx pop %rax + map_all_xmm(stkxmmload) + mov %rbp,%rsp pop %rbp ret SIZE(GNAME(alloc_tramp)) @@ -337,7 +387,7 @@ GNAME(closure_tramp): .align align_16byte,0x90 .globl GNAME(funcallable_instance_tramp) #if !defined(LISP_FEATURE_DARWIN) - .type GNAME(funcallable_instance_tramp),@function + TYPE(GNAME(funcallable_instance_tramp)) #endif GNAME(funcallable_instance_tramp): mov FUNCALLABLE_INSTANCE_FUNCTION_OFFSET(%rax),%rax @@ -345,11 +395,17 @@ GNAME(closure_tramp): * 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) + SIZE(GNAME(funcallable_instance_tramp)) #endif /* * fun-end breakpoint magic */ + +/* + * For an explanation of the magic involved in function-end + * breakpoints, see the implementation in ppc-assem.S. + */ + .text .globl GNAME(fun_end_breakpoint_guts) .align align_16byte @@ -372,6 +428,7 @@ GNAME(fun_end_breakpoint_guts): multiple_value_return: .globl GNAME(fun_end_breakpoint_trap) + .align align_16byte,0x90 GNAME(fun_end_breakpoint_trap): TRAP .byte trap_FunEndBreakpoint @@ -421,7 +478,17 @@ GNAME(post_signal_tramp): .align align_16byte,0x90 .globl GNAME(fast_bzero) TYPE(GNAME(fast_bzero)) - + + #ifdef LISP_FEATURE_WIN32 + #define xmmreg xmm7 + #define redsave(reg,off) movups reg,-off(%rsp) + #define redrestore(reg,off) movups -off(%rsp),reg + #else + #define xmmreg xmm0 + #define redsave(reg,off) + #define redrestore(reg,off) + #endif + 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. @@ -429,10 +496,10 @@ GNAME(fast_bzero): 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 */ + redsave(%xmmreg,16) + xorps %xmmreg, %xmmreg /* Zero the XMM register */ jmp Lloop - .align align_16byte + .align align_16byte Lloop: /* Copy the 16 zeroes from xmm7 to memory, 4 times. MOVNTDQ is the @@ -440,21 +507,95 @@ Lloop: * 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) + movntdq %xmmreg, 0(%rdi) + movntdq %xmmreg, 16(%rdi) + movntdq %xmmreg, 32(%rdi) + movntdq %xmmreg, 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 */ + redrestore(%xmmreg,16) 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)) + +/* When LISP_FEATURE_C_STACK_IS_CONTROL_STACK, we cannot safely scrub + * the control stack from C, largely due to not knowing where the + * active stack frame ends. On such platforms, we reimplement the + * core scrubbing logic in assembly, in this case here: + */ + .text + .align align_16byte,0x90 + .globl GNAME(arch_scrub_control_stack) + TYPE(GNAME(arch_scrub_control_stack)) +GNAME(arch_scrub_control_stack): + /* We are passed three parameters: + * A (struct thread *) in RDI, + * the address of the guard page in RSI, and + * the address of the hard guard page in RDX. + * We may trash RAX, RCX, and R8-R11 with impunity. + * [RSP] is our return address, [RSP-8] is the first + * stack slot to scrub. */ + + /* We start by setting up our scrub pointer in RAX, our + * guard page upper bound in R8, and our hard guard + * page upper bound in R9. */ + lea -8(%rsp), %rax +#ifdef LISP_FEATURE_DARWIN + mov GSYM(GNAME(os_vm_page_size)),%r9 +#else + mov os_vm_page_size,%r9 +#endif + lea (%rsi,%r9), %r8 + lea (%rdx,%r9), %r9 + + /* Now we begin our main scrub loop. */ +ascs_outer_loop: + + /* If we're about to scrub the hard guard page, exit. */ + cmp %r9, %rax + jae ascs_check_guard_page + cmp %rax, %rdx + jbe ascs_finished + +ascs_check_guard_page: + /* If we're about to scrub the guard page, and the guard + * page is protected, exit. */ + cmp %r8, %rax + jae ascs_clear_loop + cmp %rax, %rsi + ja ascs_clear_loop + cmpq $(NIL), THREAD_CONTROL_STACK_GUARD_PAGE_PROTECTED_OFFSET(%rdi) + jne ascs_finished + + /* Clear memory backwards to the start of the (4KiB) page */ +ascs_clear_loop: + movq $0, (%rax) + test $0xfff, %rax + lea -8(%rax), %rax + jnz ascs_clear_loop + + /* If we're about to hit the hard guard page, exit. */ + cmp %r9, %rax + jae ascs_finished + + /* If the next (previous?) 4KiB page contains a non-zero + * word, continue scrubbing. */ +ascs_check_loop: + testq $-1, (%rax) + jnz ascs_outer_loop + test $0xfff, %rax + lea -8(%rax), %rax + jnz ascs_check_loop + +ascs_finished: + ret + SIZE(GNAME(arch_scrub_control_stack)) + END()