> main9.s sets _tos on entry. why not just use _tos as > the c glue code does? > > - erik > >
I'm already setting _tos on entry: http://code.google.com/p/go/source/browse/src/pkg/runtime/plan9/386/rt0.s TEXT _rt0_386_plan9(SB),7, $0 MOVL AX, _tos(SB) // move arguments down to make room for // m and g at top of stack, right before Tos. ... the hard coded addresses are here: http://code.google.com/p/go/source/browse/src/pkg/runtime/mkasmh.sh case "$GOOS" in ... plan9) echo '#define get_tls(r)' echo '#define g(r) 0xdfffefc0' echo '#define m(r) 0xdfffefc4' which are easy enough to modify and here: http://code.google.com/p/go/source/browse/src/cmd/8l/pass.c ^patch(void) ... if(HEADTYPE == 2) { // Plan 9 if(p->from.type == D_INDIR+D_GS && p->to.type >= D_AX && p->to.type <= D_DI) { p->as = AMOVL; p->from.type = D_ADDR+D_STATIC; p->from.offset += 0xdfffefc0; } } ^dostkoff(void) ... case 2: // Plan 9 p->as = AMOVL; p->from.type = D_ADDR+D_STATIC; p->from.offset = 0xdfffefc0; p->to.type = D_CX; break; I am not that familiar with the linker, but maybe calling Sym* lookup("_tos") and adding some code to to add instructions for calculating the offset would work. It was just easier for me to start working on a kvm vm...
