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view dyncall/dyncall_call_sparc_v9.S @ 144:5fa2d7d5de10
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author | cslag |
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date | Sat, 20 Aug 2016 15:57:20 +0200 |
parents | 3e629dc19168 |
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/* Package: dyncall Library: dyncall File: dyncall/dyncall_call_sparc_v9.S Description: Call kernel for sparc64 v9 ABI. License: Copyright (c) 2011-2015 Daniel Adler <dadler@uni-goettingen.de> Permission to use, copy, modify, and distribute this software for any purpose with or without fee is hereby granted, provided that the above copyright notice and this permission notice appear in all copies. THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #define BIAS 2047 .global dcCall_v9 /* dcCall_sparc64( DCCallVM* , void * target ) */ /* o0 o1 */ dcCall_v9: or %o0, %g0, %o3 /* o3: callvm */ or %o1, %g0, %o0 /* o0: target */ ldx [%o3+24], %o1 /* o1: mVecSize */ add %o3, 32, %o2 /* o2: stack */ /* Compute a matching stack size (approximate): o3 = align(o1+136,16) */ add %o1, (16+1+6)*8+15, %o3 and %o3, -16, %o3 neg %o3 /* o3: -stacksize */ save %sp, %o3, %sp ldd [%i2+8*0 ],%f0 /* Load double-precision float registers. */ ldd [%i2+8*1 ],%f2 ldd [%i2+8*2 ],%f4 ldd [%i2+8*3 ],%f6 ldd [%i2+8*4 ],%f8 ldd [%i2+8*5 ],%f10 ldd [%i2+8*6 ],%f12 ldd [%i2+8*7 ],%f14 ldd [%i2+8*8 ],%f16 ldd [%i2+8*9 ],%f18 ldd [%i2+8*10],%f20 ldd [%i2+8*11],%f22 ldd [%i2+8*12],%f24 ldd [%i2+8*13],%f26 ldd [%i2+8*14],%f28 ldd [%i2+8*15],%f30 ldx [%i2+8*0],%o0 /* Load output registers. */ ldx [%i2+8*1],%o1 ldx [%i2+8*2],%o2 ldx [%i2+8*3],%o3 ldx [%i2+8*4],%o4 ldx [%i2+8*5],%o5 sub %i1, 48, %i1 cmp %i1, 0 ble .do_call nop /* Copy loop: */ add %i2, 48, %i2 /* skip homing area */ or %g0, %g0, %l0 /* l0 = offset initialized to 0. */ add %sp, BIAS+((16+6)*8), %l2 /* l2 = argument area on stack space (7th word). (64+4+6*4 = byte offset 92). */ .next: ldx [%i2+%l0],%l1 /* Read from arg buffer(%i2) to %l1. */ stx %l1, [%l2+%l0] /* Write %l1 to stack space(%l2). */ add %l0, 8, %l0 /* Increment offset. */ sub %i1, 8, %i1 /* Decrement copy size. */ cmp %i1, 0 bgt .next nop .do_call: call %i0 /* Call target. */ nop or %o0, %g0, %i0 jmpl %i7 + 8, %g0 restore /* or %o0, %g0, %i0 or %o1, %g0, %i1 or %o2, %g0, %i2 or %o3, %g0, %i3 return %i7 + 8 nop Changes from v8: - fundamental data types - (un)signed int: 8,16,32,64 - float: 32,64,128 - float: IEEE 754 compilant 32 32-bit float registers f0,f1,..,f31 32 64-bit float registers f0,f2,..,f62 16 128-bit float registers f0,f4,..,f60 Description: We need to raise up a dynamic stack frame. Therefore we need to compute the stack size. We do this first, in the context of the caller as a leaf function (using o3 as scratch for addition). Then we raise the frame, ending up in o0-o3 is then i0-i3. Stack Layout: BIAS = 2047 BIAS+XX: should be 16 byte aligned. ... 136: argument overflow area 128: 1 extended word for struct/union poiner return value BIAS+ 0: 16 extended words for registers (in/local) save area [register window] Function Argument Passing: - integer %o0..%o5 (caller view). - floating-point %f0 .. %f15 - continuous memory starting at %sp+BIAS+136 (caller view). Register Usage: %fp0..%fp31 : floating-point arguments. %sp or %o6 : stack pointer, always 8 (or 16?)-byte aligned. %fp or %i6 : frame pointer. %i0 and %o0 : integer and pointer return values. %i7 and %o7 : return address. (caller puts return address to %o7, callee uses %i7) %fp0 and %fp1: return value (float). %i0..%i5 : input argument registers %o0..%o5 : output argument registers %g0 : always zero, writes to it have no effect. Register Mappings: r0-7 -> globals r8-15 -> outs r16-r23 -> locals r24-r31 -> ins Integer Register Overview Table: ID Class Name Description ------------------------------------------------------------------------------ 0 globals g0 always zero, writes to it have no effect 1 g1 2 g2 3 g3 4 g4 5 g5 6 g6 7 g7 8 out o0 [int/ptr] arg 0 and return 9 o1 arg 1 10 o2 arg 2 11 o3 arg 3 12 o4 arg 4 13 o5 arg 5 14 o6 stack pointer 15 o7 16 local l0 scratch 17 l1 18 l2 19 l3 20 l4 21 l5 22 l6 23 l7 24 in i0 [int/pt] arg 0 and return 25 i1 26 i2 27 i3 28 i4 29 i5 30 i6 frame pointer 31 i7 */ /* --------------------------------------------------------------------------- call kernel for sparc64 v9 abi tested on sparc64/linux/debian [gcc54.fsffrance.org - thanx to the farm!] new C Interface: void dcCall_sparc (DCCallVM* callvm, DCpointer target); %i0 %1 see dyncall_call_sparc.S for details. old C Interface: void dcCall_sparc (DCpointer target, DCsize size, DCpointer data); %i0 , %i1 , %i2 Input: i0 target i1 size i2 data */ #if 0 #define REGSIZE 8 #define SHEAD ((16+6)*8) #define ALIGN 16 #define IREGS 6 #define FREGS 16 #define SREGS 16 #define IBASE 0 #define FBASE (IREGS*8) // #define DHEAD ((IREGS+FREGS)*8)+SREGS*4 CALLVM_regdata = 72 CALLVM_size = 208 CALLVM_buffer = 216 #endif