Function writeToContext

source/kernel/kthread.cpp:949–1002

};
void common_fxsave(CPU* cpu, U32 address);
void writeToContext(KThread* thread, U32 stack, U32 context, bool altStack, U32 trapNo, U32 errorNo) {	
    CPU* cpu = thread->cpu;
    KMemory* memory = thread->memory;

    if (altStack) {
        memory->writed(context+0x8, thread->alternateStack);
        memory->writed(context+0xC, K_SS_ONSTACK);
        memory->writed(context+0x10, thread->alternateStackSize);
    } else {
        memory->writed(context+0x8, thread->alternateStack);
        memory->writed(context+0xC, K_SS_DISABLE);
        memory->writed(context+0x10, 0);
    }
    memory->writed(context+0x14, cpu->seg[GS].value);
    memory->writed(context+0x18, cpu->seg[FS].value);
    memory->writed(context+0x1C, cpu->seg[ES].value);
    memory->writed(context+0x20, cpu->seg[DS].value);
    memory->writed(context+0x24, cpu->reg[7].u32); // EDI
    memory->writed(context+0x28, cpu->reg[6].u32); // ESI
    memory->writed(context+0x2C, cpu->reg[5].u32); // EBP
    memory->writed(context+0x30, stack); // ESP
    memory->writed(context+0x34, cpu->reg[3].u32); // EBX
    memory->writed(context+0x38, cpu->reg[2].u32); // EDX
    memory->writed(context+0x3C, cpu->reg[1].u32); // ECX
    memory->writed(context+0x40, cpu->reg[0].u32); // EAX
    memory->writed(context+0x44, trapNo); // REG_TRAPNO
    memory->writed(context+0x48, errorNo); // REG_ERR
    memory->writed(context+0x4C, cpu->isBig()?cpu->eip.u32:cpu->eip.u16);
    memory->writed(context+0x50, cpu->seg[CS].value);
    memory->writed(context+0x54, cpu->flags);
    memory->writed(context+0x58, 0); // REG_UESP
    memory->writed(context+0x5C, cpu->seg[SS].value);
    memory->writed(context+0x60, 0); // sigset_t uc_sigmask;
    memory->writed(context+0x64, 0); // cr2
    memory->writed(context+0x68, context + 0x70); // fpu save state
    // sizeof(struct _fpstate) = 624 (0x270) on 32-bit debian 11
    memory->writed(context+0x70, cpu->fpu.CW());
    memory->writed(context+0x74, cpu->fpu.SW());
    memory->writed(context+0x78, cpu->fpu.GetTag(cpu));
    memory->writed(context+0x7C, 0);
    memory->writed(context+0x80, 0);
    memory->writed(context+0x84, 0);
    memory->writed(context+0x88, 0);
    for (U32 i = 0; i < 8; i++) {
        U32 address = context + 0x8C + i * 10;
        cpu->fpu.ST80(cpu, address, cpu->fpu.STV(i));
    }
    memory->writew(context + 0xDC, 0); // status
    // magic :TODO: what should this value be, wine just checks if it has a value 
    // #define FPUX_sig(context)    (FPU_sig(context) && !((context)->uc_mcontext.fpregs->status >> 16) ? (XSAVE_FORMAT *)(FPU_sig(context) + 1) : NULL)
    memory->writew(context + 0xDE, 1);
    memory->memset(context + 0xE0, 0, 512); // wine will look for a magic number that we don't want to set. fpu->Reserved4)[12] == FP_XSTATE_MAGIC1
    common_fxsave(cpu, context + 0xE0);
}

void common_fxrstor(CPU* cpu, U32 address);
void readFromContext(CPU* cpu, U32 context) {