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Diffstat (limited to 'newlib/libc/sys/a29khif/signal.s')
| -rw-r--r-- | newlib/libc/sys/a29khif/signal.s | 452 |
1 files changed, 0 insertions, 452 deletions
diff --git a/newlib/libc/sys/a29khif/signal.s b/newlib/libc/sys/a29khif/signal.s deleted file mode 100644 index 29273a0..0000000 --- a/newlib/libc/sys/a29khif/signal.s +++ /dev/null @@ -1,452 +0,0 @@ -;@(#)signal.s 2.15 90/10/14 21:57:55, AMD -;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; -; Copyright 1990 Advanced Micro Devices, Inc. -; -; This software is the property of Advanced Micro Devices, Inc (AMD) which -; specifically grants the user the right to modify, use and distribute this -; software provided this notice is not removed or altered. All other rights -; are reserved by AMD. -; -; AMD MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARD TO THIS -; SOFTWARE. IN NO EVENT SHALL AMD BE LIABLE FOR INCIDENTAL OR CONSEQUENTIAL -; DAMAGES IN CONNECTION WITH OR ARISING FROM THE FURNISHING, PERFORMANCE, OR -; USE OF THIS SOFTWARE. -; -; So that all may benefit from your experience, please report any problems -; or suggestions about this software to the 29K Technical Support Center at -; 800-29-29-AMD (800-292-9263) in the USA, or 0800-89-1131 in the UK, or -; 0031-11-1129 in Japan, toll free. The direct dial number is 512-462-4118. -; -; Advanced Micro Devices, Inc. -; 29K Support Products -; Mail Stop 573 -; 5900 E. Ben White Blvd. -; Austin, TX 78741 -; 800-292-9263 -;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; - .file "signal.s" - -; SigEntry is the address of an array of C-level user code signal handlers. -; They must return to the top-level before doing a sigret() return function. -; Nested signals are supported. - - .extern V_SPILL, V_FILL - .extern fill ; In crt0.s - - .align 4 - .comm WindowSize, 4 - .data -SigEntry: - .word 0 ; reserved - .word 0 ; adds. of #2 SIGINT handler - .word 0 ; reserved - .word 0 ; reserved - .word 0 ; reserved - .word 0 ; reserved - .word 0 ; reserved - .word 0 ; adds. of #8 SIGFPE handler - - .text - - .reg v0, gr96 - .reg v1, gr97 - .reg v2, gr98 - .reg v3, gr99 - - .reg tav, gr121 - .reg tpc, gr122 - .reg lrp, gr123 - .reg slp, gr124 - .reg msp, gr125 - .reg rab, gr126 - .reg rfb, gr127 - -;=================================================================== setjmp() -; int -; setjmp(label_t jmpbuf) -; { -; *jmpbuf = {gr1, msp, lr0, lr1}; -; return 0; -; } -; - .global _setjmp -_setjmp: - store 0, 0, gr1, lr2 - add lr2, lr2, 4 - store 0, 0, msp, lr2 - add lr2, lr2, 4 - store 0, 0, lr0, lr2 - add lr2, lr2, 4 - store 0, 0, lr1, lr2 - jmpi lr0 - const v0, 0 -; -;==================================================================== longjmp() -; int -; longjmp(label_t jmpbuf, int value) -; { -; /* BUG: check for this -; if (msp > jmpbuf->msp || gr1 > jmpbuf->gr1) -; longjmperror(); -; */ -; -; gr1 = jmpbuf->gr1; -; lr2addr = jmpbuf->gr1 + 8; -; msp = jmpbuf->msp; -; -; /* saved lr1 is invalid if saved lr2addr > rfb */ -; if (lr2addr > rfb) { -; /* -; * None of the registers are useful. -; * Set rfb to lr2addr - 512 & rab to rfb - 512. -; * the FILL assert will take care of filling -; */ -; lr1 = jmpbuf->lr1; -; rab = lr2addr - windowsize; -; rfb = lr2addr; -; } -; -; lr0 = jmpbuf->lr0; -; if (rfb < lr1) -; raise V_FILL; -; return value; -; } -; - .global _longjmp -_longjmp: - load 0, 0, tav, lr2 ; copy in gr1 - add v1, lr2, 4 ; v1 points to msp - ; make sure we return a non-zero value - cpeq v0, lr3, 0 - srl v0, v0, 31 - or v0, lr3, v0 - - add gr1, tav, 0 ; now update gr1 - add tav, tav, 8 ; calculate lr2addr - load 0, 0, msp, v1 ; update msp from jmpbuf - cpleu v3, tav, rfb ; if (lr2addr > rfb) - jmpt v3, $1 ; { - add v1, v1, 4 ; v1 points to lr0 - add v2, v1, 4 ; v2 points to lr1 - load 0, 0, lr1, v2 ; lr1 = value from jmpbuf - sub v3, rfb, rab ; - sub rab, tav, v3 ; rab = lr2addr - windowsize - add rfb, tav, 0 ; rfb = lr2addr -$1: ; } - load 0, 0, lr0, v1 - jmpi lr0 - asgeu V_FILL, rfb, lr1 ; may fill from rfb to lr1 -; -;================================================================== sigcode -; About to deliver a signal to a user mode signal handler. -; msp+(15*4) = signal_number -; msp+(14*4) = gr1 -; msp+(13*4) = rab -; msp+(12*4) = PC0 -; msp+(11*4) = PC1 -; msp+(10*4) = PC2 -; msp+( 9*4) = CHA -; msp+( 8*4) = CHD -; msp+( 7*4) = CHC -; msp+( 6*4) = ALU -; msp+( 5*4) = OPS -; msp+( 4*4) = gr121 -; msp+( 3*4) = gr99 -; msp+( 2*4) = gr98 -; msp+( 1*4) = gr97 -; msp = gr96 -; The state of all the registers (except for msp, chc and rab) -; is the same as when the process was interrupted. -; -; We must make the stack and window consistent before calling the handler -; The orignal rab value is on the stack. The interrupt handler placed -; rfb-Windowsize in rab. This is required to support nested interrupts. -; -; Note that the window becomes incosistent only during certain -; critical sections in spill, fill, longjmp and sigcode. -; rfb - rab > windowsize => we are in spill -; rfb - rab < windowsize => we are in fill -; gr1 + 8 > rfb => we are in long-longjmp case -; In case of spill, fill and lonjmp; rab is modified first, -; so if we are in one of these critical sections, -; we set rab to rfb - WINDOWSIZE. -; - .equ SIGCTX_SIZE, (16)*4 - .equ SIGCTX_SIGNUMB, (15)*4 - .equ SIGCTX_GR1_OFFSET, (14)*4 - .equ SIGCTX_RAB_OFFSET, (13)*4 - .equ SIGCTX_PC0_OFFSET, (12)*4 - .equ SIGCTX_PC1_OFFSET, (11)*4 - .equ SIGCTX_PC2_OFFSET, (10)*4 - .equ SIGCTX_CHC_OFFSET, (7)*4 - .equ SIGCTX_OPS_OFFSET, (5)*4 - .equ SIGCTX_TAV_OFFSET, (4)*4 - .global sigcode -sigcode: -; -------------------------------------------------------- R-Stack fixup - const v0, WindowSize ; get register cache size - consth v0, WindowSize - load 0, 0, v0, v0 - add v2, msp, SIGCTX_RAB_OFFSET - load 0, 0, v2, v2 ; get interrupted rab value - sub v1, rfb, v2 ; determine if rfb-rab <= WINDOW_SIZE - cpgeu v1, v1, v0 ; - jmpt v1, nfill ; jmp if spill or 'normal' interrupt - add v1, gr1, 8 - cpgt v1, v1, rfb ; interrupted longjmp can look like fill - jmpf v1, nfill ; test for long-longjmp interruption - nop ; jmp if gr1+8 <= rfb -; Fixup signal stack to re-start interrupted fill -; backup pc1 -- this is needed for the partial fill case. -; Clear chc so an interrupted load/store does not restart. -; Reset rab to a window distance below rfb, rab shall be -; decremented again on re-starting the interrupted fill. -; The interrupt handler set rab=rfb-WindowSize. -; - add v0, msp, SIGCTX_RAB_OFFSET - store 0, 0, rab, v0 ; re-store (rfb-WindowSize) for rab - const v2, fill - consth v2, fill - add v0, msp, SIGCTX_PC1_OFFSET - store 0, 0, v2, v0 - sub v2, v2, 4 ; determine pc0 - add v0, msp, SIGCTX_PC0_OFFSET - store 0, 0, v2, v0 - const v2, 0 ; clear chc - add v0, msp, SIGCTX_CHC_OFFSET - store 0, 0, v2, v0 - -nfill: - cpgt v0, gr1, rfb ; if gr1 > rfb then gr1 = rfb - jmpt v0, lower - cplt v0, gr1, rab ; if gr1 < rab then gr1 = rab - jmpt v0, raise - nop -; -------------------------------------------------------- save_regs -sig1: sub msp, msp, (4+2+25)*4 ; reserve space for regs - mfsr gr96, ipc - mfsr gr97, ipa - mfsr gr98, ipb - mfsr gr99, q - mtsrim cr, 4-1 - storem 0, 0, gr96, msp -; "push" registers stack support - add gr96, lr1, 0 - add gr97, rfb, 0 - mtsrim cr, 2-1 - add gr99, msp, 2*4 - storem 0, 0, gr96, gr99 -; "push" remaining global registers - mtsrim cr, 25-1 ; gr100-gr124 - add gr96, msp, (4+2)*4 - storem 0, 0, gr100, gr96 -; -; -------------------------------------------------------- Dummy Call - .equ RALLOC, 4*4 ; make space for function calls - add v0, rfb, 0 ; store original rfb - sub gr1, gr1, RALLOC - asgeu V_SPILL, gr1, rab - add lr1, v0, 0 ; set lr1 = original rfb - add v1, msp, (4+2+25)*4 + SIGCTX_SIGNUMB - load 0, 0, lr2, v1 ; restore signal number - sub v1, lr2, 1 ; get handler index - sll v1, v1, 2 ; point to addresses -; -; -------------------------------------------------------- call C-level -; Handler must not use HIF services other than the _sigret() type. - const v0, SigEntry - consth v0, SigEntry - add v0, v0, v1 - load 0, 0, v0, v0 ; determine if handler registered - cpeq v1, v0, 0 - jmpt v1, NoHandler - nop - calli lr0, v0 ; call C-level signal handler - nop -; -; -------------------------------------------------------- default return -NoHandler: - jmp __sigdfl - nop - -; -------------------------------------------------------- support bits -lower: sll gr1, rfb, 0 - jmp sig1 - nop -raise: sll gr1, rab, 0 - jmp sig1 - nop -/* -; -------------------------------------------------------- repair_regs - mtsrim cr, 4-1 - loadm 0, 0, gr96, msp - mtsr ipc, gr96 - mtsr ipa, gr97 - mtsr ipb, gr98 - mtsr Q, gr99 -; "pop" registers stack support - mtsrim cr, 2-1 - add gr99, msp, 2*4 - loadm 0, 0, gr96, gr99 - add lr1, gr96, 0 - add rfb, gr97, 0 -; "pop" remaining global registers - mtsrim cr, 25-1 ; gr100-gr124 - add gr96, msp, (4+2)*4 - loadm 0, 0, gr100, gr96 - add msp, msp, (4+2+25)*4 ; repair msp to save_regs entry value -; -------------------------------------------------------- end repair -*/ - -; ======================================================== _sigret() - .global __sigret -__sigret: -; repair_regs -; -------------------------------------------------------- repair_regs - mtsrim cr, 4-1 - loadm 0, 0, gr96, msp - mtsr ipc, gr96 - mtsr ipa, gr97 - mtsr ipb, gr98 - mtsr q, gr99 -; "pop" registers stack support - mtsrim cr, 2-1 - add gr99, msp, 2*4 - loadm 0, 0, gr96, gr99 - add lr1, gr96, 0 - add rfb, gr97, 0 -; "pop" remaining global registers - mtsrim cr, 25-1 ; gr100-gr124 - add gr96, msp, (4+2)*4 - loadm 0, 0, gr100, gr96 - add msp, msp, (4+2+25)*4 ; repair msp to save_regs entry value -; -------------------------------------------------------- end repair - const tav, 323 ; HIF _sigret - asneq 69, gr1,gr1 - halt ; commit suicide if returns - -; ======================================================== _sigdfl() - .global __sigdfl -__sigdfl: -; repair_regs -; -------------------------------------------------------- repair_regs - mtsrim cr, 4-1 - loadm 0, 0, gr96, msp - mtsr ipc, gr96 - mtsr ipa, gr97 - mtsr ipb, gr98 - mtsr q, gr99 -; "pop" registers stack support - mtsrim cr, 2-1 - add gr99, msp, 2*4 - loadm 0, 0, gr96, gr99 - add lr1, gr96, 0 - add rfb, gr97, 0 -; "pop" remaining global registers - mtsrim cr, 25-1 ; gr100-gr124 - add gr96, msp, (4+2)*4 - loadm 0, 0, gr100, gr96 - add msp, msp, (4+2+25)*4 ; repair msp to save_regs entry value -; -------------------------------------------------------- end repair - const tav, 322 ; HIF _sigdfl - asneq 69, gr1,gr1 - halt ; commit suicide if returns - -; ======================================================== _sigrep() -__sigrep: - .global __sigrep -; repair_regs -; -------------------------------------------------------- repair_regs - mtsrim cr, 4-1 - loadm 0, 0, gr96, msp - mtsr ipc, gr96 - mtsr ipa, gr97 - mtsr ipb, gr98 - mtsr q, gr99 -; "pop" registers stack support - mtsrim cr, 2-1 - add gr99, msp, 2*4 - loadm 0, 0, gr96, gr99 - add lr1, gr96, 0 - add rfb, gr97, 0 -; "pop" remaining global registers - mtsrim cr, 25-1 ; gr100-gr124 - add gr96, msp, (4+2)*4 - loadm 0, 0, gr100, gr96 - add msp, msp, (4+2+25)*4 ; repair msp to save_regs entry value -; -------------------------------------------------------- end repair - const tav, 324 ; HIF _sigrep - asneq 69, gr1,gr1 - halt ; commit suicide if returns - -; ======================================================== _sigskp() - .global __sigskp -__sigskp: -; repair_regs -; -------------------------------------------------------- repair_regs - mtsrim cr, 4-1 - loadm 0, 0, gr96, msp - mtsr ipc, gr96 - mtsr ipa, gr97 - mtsr ipb, gr98 - mtsr q, gr99 -; "pop" registers stack support - mtsrim cr, 2-1 - add gr99, msp, 2*4 - loadm 0, 0, gr96, gr99 - add lr1, gr96, 0 - add rfb, gr97, 0 -; "pop" remaining global registers - mtsrim cr, 25-1 ; gr100-gr124 - add gr96, msp, (4+2)*4 - loadm 0, 0, gr100, gr96 - add msp, msp, (4+2+25)*4 ; repair msp to save_regs entry value -; -------------------------------------------------------- end repair - const tav, 325 ; HIF _sigskp - asneq 69, gr1,gr1 - halt ; commit suicide if returns - -; ======================================================== _sendsig() -; lr2 = signal number - .global _raise - .global __sendsig -_raise: -__sendsig: - const tav, 326 ; HIF sendsig - asneq 69, gr1,gr1 - jmpi lr0 - nop - -; -; ======================================================== signal() -; lr2 = signal number -; lr3 = handler address - .global _signal -_signal: -; the memory variable WindowSize must be initalised at the -; start when rfb and rab are a window size apart. - const v0, WindowSize ; get register cache size - consth v0, WindowSize - load 0, 0, v1, v0 - cpeq v1, v1, 0 - jmpf v1, WindowSizeOK - sub v1, rfb, rab ; rfb-rab = WINDOW_SIZE - store 0, 0, v1, v0 -WindowSizeOK: - const v1, SigEntry - consth v1, SigEntry - sub v3, lr2, 1 ; get handler index - sll v3, v3, 2 ; pointer to addresses - add v1, v1, v3 - store 0,0, lr3, v1 ; save new handler - - const lr2, sigcode - consth lr2, sigcode - ;Fall through to __signal -; ======================================================== _signal() - .global __signal -__signal: - const tav, 321 ; HIF signal - asneq 69, gr1,gr1 - jmpi lr0 - nop |