X-Git-Url: http://repo.macrolet.net/gitweb/?a=blobdiff_plain;f=src%2Fruntime%2Fmips-assem.S;h=2b882c237465b67f1f2a47d9f45f3a4342fea15b;hb=df61d054712f14fda874034fde70a269a76c792b;hp=5bf5448f57fd7c8a75c1a1c7ea8f7aba51495917;hpb=fd00d78accb69be3a626a29120ba17a18569b98c;p=sbcl.git diff --git a/src/runtime/mips-assem.S b/src/runtime/mips-assem.S index 5bf5448..2b882c2 100644 --- a/src/runtime/mips-assem.S +++ b/src/runtime/mips-assem.S @@ -3,6 +3,7 @@ #include "globals.h" #include "genesis/fdefn.h" #include "genesis/closure.h" +#include "genesis/return-pc.h" #include "genesis/simple-fun.h" #include "genesis/static-symbols.h" @@ -40,6 +41,16 @@ #define ra $31 /* + * LEAF - declare leaf routine + */ +#define LEAF(symbol) \ + .globl symbol; \ + .align 2; \ + .type symbol,@function; \ + .ent symbol,0; \ +symbol: .frame sp,0,ra + +/* * NESTED - declare nested routine entry point */ #define NESTED(symbol, framesize, rpc) \ @@ -56,6 +67,21 @@ symbol: .frame sp, framesize, rpc .end function; \ .size function,.-function +/* + * EXPORT - export definition of symbol + */ +#define EXPORT(symbol) \ + .globl symbol; \ +symbol: + +/* + * FEXPORT - export definition of a function symbol + */ +#define FEXPORT(symbol) \ + .globl symbol; \ + .type symbol,@function; \ +symbol: + .text @@ -64,51 +90,44 @@ symbol: .frame sp, framesize, rpc */ #define framesize 16*4 NESTED(call_into_lisp, framesize, ra) + .set noreorder + .cpload t9 + .set reorder subu sp, framesize + /* Save all the C regs. */ - .mask 0xd0ff0000, -4 - sw ra, framesize(sp) - sw s8, framesize-4(sp) - sw gp, framesize-8(sp) - sw s7, framesize-12(sp) - sw s6, framesize-16(sp) - sw s5, framesize-20(sp) - sw s4, framesize-24(sp) - sw s3, framesize-28(sp) - sw s2, framesize-32(sp) - sw s1, framesize-36(sp) - sw s0, framesize-40(sp) - - /* Clear descriptor regs */ - move t0, zero - move t1, zero - move t2, zero - move t3, zero - move t4, zero - move t5, zero - move t6, zero - move t7, zero - move t8, zero - move s0, zero - move s1, zero - move s2, zero - move s3, zero - move ra, zero + .mask 0xc0ff0000, -8 + sw ra, framesize-8(sp) + sw s8, framesize-12(sp) + /* No .cprestore, we don't want automatic gp restauration. */ + sw gp, framesize-16(sp) + sw s7, framesize-20(sp) + sw s6, framesize-24(sp) + sw s5, framesize-28(sp) + sw s4, framesize-32(sp) + sw s3, framesize-36(sp) + sw s2, framesize-40(sp) + sw s1, framesize-44(sp) + sw s0, framesize-48(sp) li reg_NIL, NIL - /* Start pseudo-atomic. */ + /* Clear unsaved boxed descriptor regs */ + li reg_FDEFN, 0 # t6 + li reg_L1, 0 # t8 + + /* Turn on pseudo-atomic. */ .set noreorder li reg_NL4, 0 li reg_ALLOC, 1 .set reorder - /* No longer in foreign call. */ + /* 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 - add reg_ALLOC, reg_BSP + addu reg_ALLOC, reg_BSP /* Load the rest of the LISP state. */ lw reg_BSP, current_binding_stack_pointer @@ -117,12 +136,10 @@ symbol: .frame sp, framesize, rpc /* Check for interrupt */ .set noreorder - bgez reg_NL4, pa1 - nop + bgez reg_NL4, 1f + subu reg_ALLOC, 1 break 0x10 -pa1: - subu reg_ALLOC, 1 - .set reorder +1: .set reorder /* Pass in args */ move reg_LEXENV, a0 @@ -136,73 +153,66 @@ pa1: lw reg_A5, 20(reg_CFP) /* Calculate LRA */ - la reg_LRA, lra + OTHER_POINTER_LOWTAG + la reg_LRA, lra - RETURN_PC_RETURN_POINT_OFFSET /* Indirect closure */ - lw reg_CODE, -1(reg_LEXENV) + lw reg_CODE, CLOSURE_FUN_OFFSET(reg_LEXENV) /* Jump into lisp land. */ - addu reg_LIP, reg_CODE, 6*4 - FUN_POINTER_LOWTAG + addu reg_LIP, reg_CODE, SIMPLE_FUN_CODE_OFFSET jr reg_LIP + .align 2 .set noreorder - .align 3 -#ifdef irix - /* This particular KLUDGE is kept here as a reminder; for more - details, see irix-asm-munge.c from CMUCL's lisp directory. - Other examples have been deleted from later in the file in the - hope that they will not be needed. */ -.globl mipsmungelra /* for our munging afterwards in irix-asm-munge */ -mipsmungelra: -#endif -lra: - .word RETURN_PC_HEADER_WIDETAG +lra: .word RETURN_PC_HEADER_WIDETAG - /* Multiple value return spot, clear stack */ + /* Multiple value return spot, clear stack. */ move reg_CSP, reg_OCFP nop - /* Set pseudo-atomic flag. */ + /* Single value return spot. */ + + /* Nested lisp -> C calls may have clobbered gp. */ + lw gp, framesize-16(sp) + + /* Set the pseudo-atomic flag. */ li reg_NL4, 0 addu reg_ALLOC, 1 .set reorder - /* Save LISP registers. */ + /* Save LISP state. */ subu reg_NL0, reg_ALLOC, 1 sw reg_NL0, dynamic_space_free_pointer sw reg_BSP, current_binding_stack_pointer sw reg_CSP, current_control_stack_pointer sw reg_CFP, current_control_frame_pointer - /* Pass one return value back to C land. */ - /* v0 is reg_ALLOC in this new world, so do this after saving - reg_ALLOC in dynamic_space_free_pointer */ - move v0, reg_A0 - - /* Back in foreign function call */ - sw reg_CFP, foreign_function_call_active + /* Mark us as in C land. */ + sw reg_CSP, foreign_function_call_active /* Check for interrupt */ .set noreorder - bgez reg_NL4, pa2 - nop + bgez reg_NL4, 1f + subu reg_ALLOC, 1 break 0x10 -pa2: - subu reg_ALLOC, 1 - .set reorder +1: .set reorder + + /* Pass one return value back to C land. For a 64bit value, we may + need to clobber v1 aka reg_NL4. */ + move v0, reg_A0 # reg_CFUNC + move v1, reg_A1 # reg_NL4 /* Restore C regs */ - lw ra, framesize(sp) - lw s8, framesize-4(sp) - lw gp, framesize-8(sp) - lw s7, framesize-12(sp) - lw s6, framesize-16(sp) - lw s5, framesize-20(sp) - lw s4, framesize-24(sp) - lw s3, framesize-28(sp) - lw s2, framesize-32(sp) - lw s1, framesize-36(sp) - lw s0, framesize-40(sp) + lw ra, framesize-8(sp) + lw s8, framesize-12(sp) + lw s7, framesize-20(sp) + lw s6, framesize-24(sp) + lw s5, framesize-28(sp) + lw s4, framesize-32(sp) + lw s3, framesize-36(sp) + lw s2, framesize-40(sp) + lw s1, framesize-44(sp) + lw s0, framesize-48(sp) /* Restore C stack. */ addu sp, framesize @@ -215,23 +225,24 @@ pa2: /* * Transfering control from Lisp into C */ - .globl call_into_c - .align 2 - .type call_into_c,@function - .ent call_into_c,0 -call_into_c: - /* Set up a stack frame. */ + NESTED(call_into_c, 0, ra) + /* The C stack frame was already set up from lisp, and the + argument registers as well. We have to fake the correct + gp value for this function, though. */ + .set noreorder + /* reg_NL3 is AT. */ + .set noat + lui gp, %hi(_gp_disp) + addiu gp, %lo(_gp_disp) + lui reg_NL3, %hi(call_into_c) + addiu reg_NL3, %lo(call_into_c) + addu gp, reg_NL3 + .set at + .set reorder + move reg_OCFP, reg_CFP move reg_CFP, reg_CSP addu reg_CSP, reg_CFP, 32 - sw reg_OCFP, 0(reg_CFP) - subu reg_NL4, reg_LIP, reg_CODE - addu reg_NL4, OTHER_POINTER_LOWTAG - sw reg_NL4, 4(reg_CFP) - sw reg_CODE, 8(reg_CFP) - sw gp, 12(reg_CFP) - - /* Note: the C stack is already set up. */ /* Set the pseudo-atomic flag. */ .set noreorder @@ -239,9 +250,16 @@ call_into_c: addu reg_ALLOC, 1 .set reorder - /* Save lisp state. */ - subu t0, reg_ALLOC, 1 - sw t0, dynamic_space_free_pointer + /* 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_CODE, 4(reg_CFP) + sw gp, 8(reg_CFP) + + /* Save LISP state. */ + subu reg_A0, reg_ALLOC, 1 + sw reg_A0, dynamic_space_free_pointer sw reg_BSP, current_binding_stack_pointer sw reg_CSP, current_control_stack_pointer sw reg_CFP, current_control_frame_pointer @@ -249,36 +267,34 @@ call_into_c: /* Mark us as in C land. */ sw reg_CSP, foreign_function_call_active - /* Were we interrupted? */ + /* Check for interrupt */ .set noreorder - bgez reg_NL4, pa3 - nop + bgez reg_NL4, 1f + subu reg_ALLOC, 1 break 0x10 -pa3: - subu reg_ALLOC, 1 - .set reorder +1: .set reorder /* Into C land we go. */ - move t9, reg_CFUNC + move t9, reg_CFUNC # reg_ALLOC jalr t9 - nop - lw gp, 12(reg_CFP) - - /* Clear unsaved descriptor regs */ - move t0, zero - move t1, zero - move t2, zero - move t3, zero - move t4, zero - move t5, zero - move t6, zero - move t7, zero - move t8, zero - move s0, zero - move s2, zero - move s3, zero - move ra, zero + lw gp, 8(reg_CFP) + + /* Pass 64bit return value to lisp land. */ + move reg_NL0, v0 # reg_CFUNC + move reg_NL1, v1 # reg_NL4 + + /* Clear unsaved boxed descriptor regs before allowing an interrupt */ + li reg_A0, 0 # t0 + li reg_A1, 0 # t1 + li reg_A2, 0 # t2 + li reg_A3, 0 # t3 + li reg_A4, 0 # t4 + li reg_A5, 0 # t5 + li reg_FDEFN, 0 # t6 + li reg_LEXENV, 0 # t7 + li reg_L1, 0 # t8 + li reg_LIP, 0 # ra /* Turn on pseudo-atomic. */ .set noreorder @@ -286,27 +302,27 @@ pa3: li reg_ALLOC, 1 .set reorder - /* Mark us at in Lisp land. */ + /* Mark us as in Lisp land. */ sw zero, foreign_function_call_active - /* Restore ALLOC, preserving pseudo-atomic-atomic */ - lw a0, dynamic_space_free_pointer - addu reg_ALLOC, a0 + /* Load the allocation pointer, preserving the low-bit of alloc */ + lw reg_BSP, dynamic_space_free_pointer + addu reg_ALLOC, reg_BSP + + lw reg_BSP, current_binding_stack_pointer + + /* Restore LRA & CODE */ + lw reg_LIP, (reg_CFP) + lw reg_CODE, 4(reg_CFP) + subu reg_LIP, OTHER_POINTER_LOWTAG + addu reg_LIP, reg_CODE /* Check for interrupt */ .set noreorder - bgez reg_NL4, pa4 - nop + bgez reg_NL4, 1f + subu reg_ALLOC, 1 break 0x10 -pa4: - subu reg_ALLOC, 1 - .set reorder - - /* Restore LRA & CODE (they may have been GC'ed) */ - lw reg_CODE, 8(reg_CFP) - lw a0, 4(reg_CFP) - subu a0, OTHER_POINTER_LOWTAG - addu reg_LIP, reg_CODE, a0 +1: .set reorder /* Reset the lisp stack. */ /* Note: OCFP and CFP are in saved regs. */ @@ -314,56 +330,60 @@ pa4: move reg_CFP, reg_OCFP /* Return to LISP. */ - j reg_LIP - + jr reg_LIP END(call_into_c) - .globl start_of_tramps -start_of_tramps: - /* + * Trampolines follow the Lisp calling convention. + * * The undefined-function trampoline. */ - .globl undefined_tramp - .ent undefined_tramp -undefined_tramp: - break 10 - .byte 4 - .byte UNDEFINED_FUN_ERROR - .byte 254 - .byte (0xc0 + sc_DescriptorReg) - .byte 1 - .align 2 - .end undefined_tramp + .align 2 + .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 */ + LEAF(undefined_tramp) + break trap_Error + .byte 4 + .byte UNDEFINED_FUN_ERROR + .byte 254 + .byte (0xc0 + sc_DescriptorReg) + .byte 1 + .align 2 + END(undefined_tramp) /* * The closure trampoline. */ - .globl closure_tramp - .ent closure_tramp -closure_tramp: - lw reg_LEXENV, FDEFN_FUN_OFFSET(reg_FDEFN) - lw reg_L0, CLOSURE_FUN_OFFSET(reg_LEXENV) - addu reg_LIP, reg_L0, SIMPLE_FUN_CODE_OFFSET - j reg_LIP - .end closure_tramp - - .globl end_of_tramps -end_of_tramps: - + .align 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 */ + LEAF(closure_tramp) + lw reg_LEXENV, FDEFN_FUN_OFFSET(reg_FDEFN) + lw reg_CODE, CLOSURE_FUN_OFFSET(reg_LEXENV) + addu reg_LIP, reg_CODE, SIMPLE_FUN_CODE_OFFSET + jr reg_LIP + END(closure_tramp) /* * Function-end breakpoint magic. */ - - .align 2 + .align 3 + LEAF(fun_end_breakpoint_guts) .set noreorder - .globl function_end_breakpoint_guts -fun_end_breakpoint_guts: .word RETURN_PC_HEADER_WIDETAG - - beq zero, zero, 1f - nop + + b multiple_value_return + nop + .set reorder + move reg_OCFP, reg_CSP addu reg_CSP, 4 li reg_NARGS, 4 @@ -372,14 +392,11 @@ fun_end_breakpoint_guts: move reg_A3, reg_NIL move reg_A4, reg_NIL move reg_A5, reg_NIL -1: - .globl fun_end_breakpoint_trap -fun_end_breakpoint_trap: - break trap_FunEndBreakpoint - beq zero, zero, 1b - nop +multiple_value_return: - .globl fun_end_breakpoint_end -fun_end_breakpoint_end: - .set reorder + FEXPORT(fun_end_breakpoint_trap) + break trap_FunEndBreakpoint + b multiple_value_return + EXPORT(fun_end_breakpoint_end) + END(fun_end_breakpoint_guts)