forked from Hay1tsme/segatools
119 lines
2.5 KiB
C
119 lines
2.5 KiB
C
#include <windows.h>
|
|
|
|
#include "hook/iohook.h"
|
|
|
|
#include "nu/sram.h"
|
|
#include "nu/nvram.h"
|
|
|
|
#include "util/dprintf.h"
|
|
#include "util/setupapi.h"
|
|
|
|
static HRESULT sram_handle_irp(struct irp *irp);
|
|
static HRESULT sram_handle_open(struct irp *irp);
|
|
static HRESULT sram_handle_close(struct irp *irp);
|
|
static HRESULT sram_handle_ioctl(struct irp *irp);
|
|
|
|
static HRESULT sram_ioctl_get_geometry(struct irp *irp);
|
|
|
|
static HANDLE sram_file;
|
|
|
|
HRESULT sram_hook_init(void)
|
|
{
|
|
HRESULT hr;
|
|
|
|
hr = nvram_open_file(&sram_file, L"DEVICE\\sram.bin", 0x80000);
|
|
|
|
if (FAILED(hr)) {
|
|
return hr;
|
|
}
|
|
|
|
hr = iohook_push_handler(sram_handle_irp);
|
|
|
|
if (FAILED(hr)) {
|
|
return hr;
|
|
}
|
|
|
|
hr = setupapi_add_phantom_dev(&sram_guid, L"$sram");
|
|
|
|
if (FAILED(hr)) {
|
|
return hr;
|
|
}
|
|
|
|
return S_OK;
|
|
}
|
|
|
|
static HRESULT sram_handle_irp(struct irp *irp)
|
|
{
|
|
assert(irp != NULL);
|
|
|
|
if (irp->op != IRP_OP_OPEN && irp->fd != sram_file) {
|
|
return iohook_invoke_next(irp);
|
|
}
|
|
|
|
switch (irp->op) {
|
|
case IRP_OP_OPEN: return sram_handle_open(irp);
|
|
case IRP_OP_CLOSE: return sram_handle_close(irp);
|
|
case IRP_OP_IOCTL: return sram_handle_ioctl(irp);
|
|
default: return iohook_invoke_next(irp);
|
|
}
|
|
}
|
|
|
|
static HRESULT sram_handle_open(struct irp *irp)
|
|
{
|
|
if (wcscmp(irp->open_filename, L"$sram") != 0) {
|
|
return iohook_invoke_next(irp);
|
|
}
|
|
|
|
dprintf("SRAM: Open device\n");
|
|
irp->fd = sram_file;
|
|
|
|
return S_OK;
|
|
}
|
|
|
|
static HRESULT sram_handle_close(struct irp *irp)
|
|
{
|
|
dprintf("SRAM: Close device\n");
|
|
|
|
return S_OK;
|
|
}
|
|
|
|
static HRESULT sram_handle_ioctl(struct irp *irp)
|
|
{
|
|
switch (irp->ioctl) {
|
|
case IOCTL_DISK_GET_DRIVE_GEOMETRY:
|
|
return sram_ioctl_get_geometry(irp);
|
|
|
|
default:
|
|
dprintf("SRAM: Unknown ioctl %x, write %i read %i\n",
|
|
irp->ioctl,
|
|
irp->write.nbytes,
|
|
irp->read.nbytes);
|
|
|
|
return HRESULT_FROM_WIN32(ERROR_INVALID_FUNCTION);
|
|
}
|
|
}
|
|
|
|
static HRESULT sram_ioctl_get_geometry(struct irp *irp)
|
|
{
|
|
DISK_GEOMETRY *out;
|
|
|
|
if (irp->read.nbytes < sizeof(*out)) {
|
|
dprintf("SRAM: Invalid ioctl response buffer size\n");
|
|
|
|
return HRESULT_FROM_WIN32(ERROR_INSUFFICIENT_BUFFER);
|
|
}
|
|
|
|
dprintf("SRAM: Get geometry\n");
|
|
|
|
out = (DISK_GEOMETRY *) irp->read.bytes;
|
|
out->Cylinders.QuadPart = 0x20000;
|
|
out->MediaType = 0;
|
|
out->TracksPerCylinder = 1;
|
|
out->SectorsPerTrack = 1;
|
|
out->BytesPerSector = 4;
|
|
|
|
irp->read.pos = sizeof(*out);
|
|
|
|
return S_OK;
|
|
}
|