X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fruntime%2Fmips-assem.S;h=62b3672ecfdcc337df25d7ebc62d30029dcfde59;hb=35ab27e7aab71c94aa6be12da15603c7fd87fca8;hp=2b882c237465b67f1f2a47d9f45f3a4342fea15b;hpb=e3547b45241fdc4a2aaab382f1e7e8f71566beba;p=sbcl.git diff --git a/src/runtime/mips-assem.S b/src/runtime/mips-assem.S index 2b882c2..62b3672 100644 --- a/src/runtime/mips-assem.S +++ b/src/runtime/mips-assem.S @@ -1,9 +1,24 @@ +/* + * very-low-level utilities for runtime support + */ + +/* + * This software is part of the SBCL system. See the README file for + * more information. + * + * This software is derived from the CMU CL system, which was + * written at Carnegie Mellon University and released into the + * public domain. The software is in the public domain and is + * provided with absolutely no warranty. See the COPYING and CREDITS + * files for more information. + */ + #include "sbcl.h" #include "lispregs.h" #include "globals.h" #include "genesis/fdefn.h" #include "genesis/closure.h" -#include "genesis/return-pc.h" +#include "genesis/funcallable-instance.h" #include "genesis/simple-fun.h" #include "genesis/static-symbols.h" @@ -122,9 +137,6 @@ symbol: li reg_ALLOC, 1 .set reorder - /* Mark us as in Lisp land. */ - sw zero, foreign_function_call_active - /* Load the allocation pointer, preserving the low-bit of alloc */ lw reg_BSP, dynamic_space_free_pointer addu reg_ALLOC, reg_BSP @@ -138,7 +150,7 @@ symbol: .set noreorder bgez reg_NL4, 1f subu reg_ALLOC, 1 - break 0x10 + break 0x0, 0x10 1: .set reorder /* Pass in args */ @@ -153,16 +165,20 @@ symbol: lw reg_A5, 20(reg_CFP) /* Calculate LRA */ - la reg_LRA, lra - RETURN_PC_RETURN_POINT_OFFSET + la reg_LRA, lra + OTHER_POINTER_LOWTAG /* Indirect closure */ lw reg_CODE, CLOSURE_FUN_OFFSET(reg_LEXENV) - /* Jump into lisp land. */ addu reg_LIP, reg_CODE, SIMPLE_FUN_CODE_OFFSET + + /* Mark us as in Lisp land. */ + sw zero, foreign_function_call_active + + /* Jump into lisp land. */ jr reg_LIP - .align 2 + .align 3 .set noreorder lra: .word RETURN_PC_HEADER_WIDETAG @@ -175,6 +191,9 @@ lra: .word RETURN_PC_HEADER_WIDETAG /* Nested lisp -> C calls may have clobbered gp. */ lw gp, framesize-16(sp) + /* Mark us as in C land. */ + sw reg_CSP, foreign_function_call_active + /* Set the pseudo-atomic flag. */ li reg_NL4, 0 addu reg_ALLOC, 1 @@ -187,14 +206,11 @@ lra: .word RETURN_PC_HEADER_WIDETAG sw reg_CSP, current_control_stack_pointer sw reg_CFP, current_control_frame_pointer - /* Mark us as in C land. */ - sw reg_CSP, foreign_function_call_active - /* Check for interrupt */ .set noreorder bgez reg_NL4, 1f subu reg_ALLOC, 1 - break 0x10 + break 0x0, 0x10 1: .set reorder /* Pass one return value back to C land. For a 64bit value, we may @@ -240,10 +256,14 @@ lra: .word RETURN_PC_HEADER_WIDETAG .set at .set reorder + /* Setup the lisp stack. */ move reg_OCFP, reg_CFP move reg_CFP, reg_CSP addu reg_CSP, reg_CFP, 32 + /* Mark us as in C land. */ + sw reg_CSP, foreign_function_call_active + /* Set the pseudo-atomic flag. */ .set noreorder li reg_NL4, 0 @@ -253,7 +273,7 @@ lra: .word RETURN_PC_HEADER_WIDETAG /* Convert the return address to an offset and save it on the stack. */ subu reg_NFP, reg_LIP, reg_CODE addu reg_NFP, OTHER_POINTER_LOWTAG - sw reg_NFP, (reg_CFP) + sw reg_LRA, (reg_CFP) sw reg_CODE, 4(reg_CFP) sw gp, 8(reg_CFP) @@ -264,14 +284,11 @@ lra: .word RETURN_PC_HEADER_WIDETAG sw reg_CSP, current_control_stack_pointer sw reg_CFP, current_control_frame_pointer - /* Mark us as in C land. */ - sw reg_CSP, foreign_function_call_active - /* Check for interrupt */ .set noreorder bgez reg_NL4, 1f subu reg_ALLOC, 1 - break 0x10 + break 0x0, 0x10 1: .set reorder /* Into C land we go. */ @@ -284,7 +301,11 @@ lra: .word RETURN_PC_HEADER_WIDETAG move reg_NL0, v0 # reg_CFUNC move reg_NL1, v1 # reg_NL4 - /* Clear unsaved boxed descriptor regs before allowing an interrupt */ + /* + * Clear boxed descriptor registers before allowing an interrupt. + * We can't rely on C saving some of those registers, they might + * have been GCed in the meanwhile. + */ li reg_A0, 0 # t0 li reg_A1, 0 # t1 li reg_A2, 0 # t2 @@ -293,7 +314,14 @@ lra: .word RETURN_PC_HEADER_WIDETAG li reg_A5, 0 # t5 li reg_FDEFN, 0 # t6 li reg_LEXENV, 0 # t7 + /* + * reg_NFP and reg_OCFP are pointing to fixed locations and are + * preserved by C. + */ + li reg_LRA, 0 # s2 + li reg_L0, 0 # s3 li reg_L1, 0 # t8 + li reg_CODE, 0 # s8 li reg_LIP, 0 # ra /* Turn on pseudo-atomic. */ @@ -302,9 +330,6 @@ lra: .word RETURN_PC_HEADER_WIDETAG li reg_ALLOC, 1 .set reorder - /* Mark us as in Lisp land. */ - sw zero, foreign_function_call_active - /* Load the allocation pointer, preserving the low-bit of alloc */ lw reg_BSP, dynamic_space_free_pointer addu reg_ALLOC, reg_BSP @@ -312,16 +337,16 @@ lra: .word RETURN_PC_HEADER_WIDETAG lw reg_BSP, current_binding_stack_pointer /* Restore LRA & CODE */ - lw reg_LIP, (reg_CFP) + lw reg_LRA, (reg_CFP) lw reg_CODE, 4(reg_CFP) - subu reg_LIP, OTHER_POINTER_LOWTAG + subu reg_LIP, reg_NFP, OTHER_POINTER_LOWTAG addu reg_LIP, reg_CODE /* Check for interrupt */ .set noreorder bgez reg_NL4, 1f subu reg_ALLOC, 1 - break 0x10 + break 0x0, 0x10 1: .set reorder /* Reset the lisp stack. */ @@ -329,6 +354,9 @@ lra: .word RETURN_PC_HEADER_WIDETAG move reg_CSP, reg_CFP move reg_CFP, reg_OCFP + /* Mark us as in Lisp land. */ + sw zero, foreign_function_call_active + /* Return to LISP. */ jr reg_LIP END(call_into_c) @@ -338,33 +366,54 @@ lra: .word RETURN_PC_HEADER_WIDETAG * * The undefined-function trampoline. */ - .align 2 + .align 3 /* minimum alignment for a lisp object */ .word SIMPLE_FUN_HEADER_WIDETAG /* header */ .word undefined_tramp - SIMPLE_FUN_CODE_OFFSET /* self */ .word NIL /* next */ .word NIL /* name */ .word NIL /* arglist */ .word NIL /* type */ + .word NIL /* xrefs */ LEAF(undefined_tramp) - break trap_Error - .byte 4 - .byte UNDEFINED_FUN_ERROR - .byte 254 - .byte (0xc0 + sc_DescriptorReg) - .byte 1 + /* Point reg_CODE to the header and tag it as function, since + the debugger regards a function pointer in reg_CODE which + doesn't point to a code object as undefined function. */ + lui reg_CODE, %hi(undefined_tramp) + addiu reg_CODE, %lo(undefined_tramp) + addiu reg_CODE, -SIMPLE_FUN_CODE_OFFSET + .set noreorder + b 1f + break 0x0, trap_Cerror + /* Error data length. */ + .byte 4 + /* Error number. */ + .byte UNDEFINED_FUN_ERROR + /* Magic value 254 means a 16bit little endian value follows. + See debug-var-io.lisp. */ + .byte 254 + /* reg_FDEFN is #14. */ + .byte ((14 << 6) + sc_DescriptorReg) % 0x100 + .byte ((14 << 6) + sc_DescriptorReg) / 0x100 .align 2 + .set reorder +1: lw reg_CODE, FDEFN_FUN_OFFSET(reg_FDEFN) + lw reg_LIP, SIMPLE_FUN_CODE_OFFSET(reg_CODE) + jr reg_LIP END(undefined_tramp) /* * The closure trampoline. */ - .align 2 + .align 5 /* common MIPS cacheline size */ + .word 0 /* pad 1 */ + .word 0 /* pad 2 */ .word SIMPLE_FUN_HEADER_WIDETAG /* header */ .word closure_tramp - SIMPLE_FUN_CODE_OFFSET /* self */ .word NIL /* next */ .word NIL /* name */ .word NIL /* arglist */ .word NIL /* type */ + .word NIL /* xrefs */ LEAF(closure_tramp) lw reg_LEXENV, FDEFN_FUN_OFFSET(reg_FDEFN) lw reg_CODE, CLOSURE_FUN_OFFSET(reg_LEXENV) @@ -373,16 +422,45 @@ lra: .word RETURN_PC_HEADER_WIDETAG END(closure_tramp) /* - * Function-end breakpoint magic. + * The trampoline for funcallable instances */ + .globl funcallable_instance_tramp .align 3 - LEAF(fun_end_breakpoint_guts) - .set noreorder - .word RETURN_PC_HEADER_WIDETAG + .word SIMPLE_FUN_HEADER_WIDETAG +funcallable_instance_tramp = . + 1 + .word funcallable_instance_tramp + .word NIL + .word NIL + .word NIL + .word NIL + .word NIL + + lw reg_LEXENV, FUNCALLABLE_INSTANCE_FUNCTION_OFFSET(reg_LEXENV) + lw reg_CODE, CLOSURE_FUN_OFFSET(reg_LEXENV) + addu reg_LIP, reg_CODE, SIMPLE_FUN_CODE_OFFSET + jr reg_LIP + nop - b multiple_value_return +/* + * Function-end breakpoint magic. This is truely magic, the code is + * copied and has to be relocatable. It also needs a properly aligned + * header tag after the fun_end_breakpoint_guts symbol. + */ + +/* + * For an explanation of the magic involved in function-end + * breakpoints, see the implementation in ppc-assem.S. + */ + + .align 3 /* minimum alignment for a lisp object */ + LEAF(fun_end_breakpoint_guts) + .set noreorder + .word RETURN_PC_HEADER_WIDETAG + 0x800 + b multiple_value_return nop - .set reorder + .set reorder + + /* single value return */ move reg_OCFP, reg_CSP addu reg_CSP, 4 @@ -396,7 +474,16 @@ lra: .word RETURN_PC_HEADER_WIDETAG multiple_value_return: FEXPORT(fun_end_breakpoint_trap) - break trap_FunEndBreakpoint + .set noreorder b multiple_value_return + break 0x0, trap_FunEndBreakpoint + .set reorder EXPORT(fun_end_breakpoint_end) END(fun_end_breakpoint_guts) + + + .align 3 /* minimum alignment for a lisp object */ + LEAF(do_pending_interrupt) + break 0x0, trap_PendingInterrupt + jr reg_LIP + END(do_pending_interrupt)