X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;ds=sidebyside;f=src%2Fruntime%2Fx86-assem.S;h=1170bbad4d5e557a710444d8714c640da1482e3b;hb=dde834ef75cb12b8cdda23472b3365de72d9422a;hp=be588391bcf36d3fe187bf0fc09e62d5139ef3d8;hpb=b05ccdd91520249de6b465e226d3708089e541dc;p=sbcl.git diff --git a/src/runtime/x86-assem.S b/src/runtime/x86-assem.S index be58839..1170bba 100644 --- a/src/runtime/x86-assem.S +++ b/src/runtime/x86-assem.S @@ -16,17 +16,35 @@ #define LANGUAGE_ASSEMBLY #include "validate.h" #include "sbcl.h" - -/* Minimize conditionalization for different OS naming schemes. */ -#if defined __linux__ || defined __FreeBSD__ /* (but *not* OpenBSD) */ +#include "genesis/closure.h" +#include "genesis/fdefn.h" +#include "genesis/static-symbols.h" +#include "genesis/symbol.h" +#include "genesis/thread.h" + +/* Minimize conditionalization for different OS naming schemes. + * + * (As of sbcl-0.8.10, this seems no longer to be much of an issue, + * since everyone has converged on ELF. If this generality really + * turns out not to matter, perhaps it's just clutter we could get + * rid of? -- WHN 2004-04-18) + */ +#if defined __linux__ || defined __FreeBSD__ || defined __NetBSD__ || defined __OpenBSD__ #define GNAME(var) var #else #define GNAME(var) _##var #endif -/* Get the right type of alignment. Linux and FreeBSD (but not OpenBSD) - * want alignment in bytes. */ -#if defined(__linux__) || defined(__FreeBSD__) +/* Get the right type of alignment. Linux, FreeBSD and NetBSD (but not OpenBSD) + * want alignment in bytes. + * + * (As in the GNAME() definitions above, as of sbcl-0.8.10, this seems + * no longer to be much of an issue, since everyone has converged on + * the same value. If this generality really turns out not to + * matter any more, perhaps it's just clutter we could get + * rid of? -- WHN 2004-04-18) + */ +#if defined(__linux__) || defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) #define align_4byte 4 #define align_8byte 8 #define align_16byte 16 @@ -38,7 +56,7 @@ .text .global GNAME(foreign_function_call_active) - + .global GNAME(all_threads) /* * A call to call_into_c preserves esi, edi, and ebp. @@ -122,27 +140,46 @@ Lfp_rtn_value: .text + .global GNAME(call_into_lisp_first_time) + .type GNAME(call_into_lisp_first_time),@function + +/* 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 + * here, because we never expect to return from the initial call to lisp + * anyway */ + + .align align_16byte,0x90 +GNAME(call_into_lisp_first_time): + pushl %ebp # Save old frame pointer. + movl %esp,%ebp # Establish new frame. + movl %esp,ALIEN_STACK + SYMBOL_VALUE_OFFSET + movl GNAME(all_threads),%eax + movl THREAD_CONTROL_STACK_START_OFFSET(%eax) ,%esp + /* don't think too hard about what happens if we get interrupted + * here */ + addl $THREAD_CONTROL_STACK_SIZE-4,%esp + jmp Lstack + + .text .global GNAME(call_into_lisp) .type GNAME(call_into_lisp),@function /* The C conventions require that ebx, esi, edi, and ebp be preserved * across function calls. */ -/* The *ALIEN-STACK* pointer is set up on the first call_into_lisp when - * the stack changes. */ .align align_16byte,0x90 GNAME(call_into_lisp): pushl %ebp # Save old frame pointer. movl %esp,%ebp # Establish new frame. - +Lstack: /* Save the NPX state */ fwait # Catch any pending NPX exceptions. subl $108,%esp # Make room for the NPX state. - fnsave (%esp) # resets NPX + fnsave (%esp) # save and reset NPX movl (%esp),%eax # Load NPX control word. - andl $0xfffff3ff,%eax # Set rounding mode to nearest. - orl $0x00000300,%eax # Set precision to 64 bits. + andl $0xfffff2ff,%eax # Set rounding mode to nearest. + orl $0x00000200,%eax # Set precision to 64 bits. (53-bit mantissa) pushl %eax fldcw (%esp) # Recover modes. popl %eax @@ -173,15 +210,6 @@ GNAME(call_into_lisp): movl %eax, GNAME(foreign_function_call_active) movl %esp,%ebx # remember current stack - cmpl $CONTROL_STACK_START,%esp - jbe ChangeToLispStack - cmpl $CONTROL_STACK_END,%esp - jbe OnLispStack -ChangeToLispStack: - /* Setup the *alien-stack* pointer */ - movl %esp,ALIEN_STACK + SYMBOL_VALUE_OFFSET - movl $CONTROL_STACK_END,%esp # new stack -OnLispStack: pushl %ebx # Save entry stack on (maybe) new stack. /* Establish Lisp args. */ @@ -207,12 +235,12 @@ Ldone: sub $8,%esp # Ensure 3 slots are allocated, one above. mov %ebx,%ebp # Switch to new frame. - /* Indirect the closure. */ call *CLOSURE_FUN_OFFSET(%eax) - /* Multi-value return; blow off any extra values. */ + /* If the function returned multiple values, it will return to + this point. Lose them */ mov %ebx, %esp - /* single value return */ + /* A singled value function returns here */ /* Restore the stack, in case there was a stack change. */ popl %esp # c-sp @@ -324,28 +352,6 @@ GNAME(do_pending_interrupt): ret .size GNAME(do_pending_interrupt),.-GNAME(do_pending_interrupt) -#ifdef GENCGC -/* This is a fast bzero using the FPU. The first argument is the start - * address which needs to be aligned on an 8 byte boundary, the second - * argument is the number of bytes, which must be a nonzero multiple - * of 8 bytes. */ - .text - .globl GNAME(i586_bzero) - .type GNAME(i586_bzero),@function - .align align_4byte,0x90 -GNAME(i586_bzero): - movl 4(%esp),%edx # Load the start address. - movl 8(%esp),%eax # Load the number of bytes. - fldz -l1: fstl 0(%edx) - addl $8,%edx - subl $8,%eax - jnz l1 - fstp %st(0) - ret - .size GNAME(i586_bzero),.-GNAME(i586_bzero) -#endif - /* * Allocate bytes and return the start of the allocated space @@ -654,8 +660,22 @@ GNAME(alloc_16_to_edi): .size GNAME(alloc_16_to_edi),.-GNAME(alloc_16_to_edi) + .align align_4byte,0x90 + .globl GNAME(post_signal_tramp) + .type GNAME(post_signal_tramp),@function +GNAME(post_signal_tramp): + /* this is notionally the second half of a function whose first half + * doesn't exist. This is where call_into_lisp returns when called + * using return_to_lisp_function */ + addl $12,%esp /* clear call_into_lisp args from stack */ + popa /* restore registers */ + popl %ebp + ret + .size GNAME(post_signal_tramp),.-GNAME(post_signal_tramp) + + -#ifdef GENCGC +#ifdef GENCGC_INLINE_ALLOC /* LISP_FEATURE_GENCGC */ /* These routines are called from Lisp when an inline allocation * overflows. Every register except the result needs to be preserved.