forked from Hay1tsme/segatools
91 lines
2.1 KiB
C
91 lines
2.1 KiB
C
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#include <windows.h>
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#include <assert.h>
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#include <string.h>
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#include "util/dprintf.h"
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#include "hook/iohook.h"
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#include "nu/hwmon.h"
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enum {
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HWMON_IOCTL_READ_CPU_TEMP = 0x80006000,
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};
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static HRESULT hwmon_handle_irp(struct irp *irp);
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static HRESULT hwmon_handle_open(struct irp *irp);
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static HRESULT hwmon_handle_close(struct irp *irp);
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static HRESULT hwmon_handle_ioctl(struct irp *irp);
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static HRESULT hwmon_ioctl_read_cpu_temp(struct irp *irp);
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static HANDLE hwmon_fd;
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void hwmon_hook_init(void)
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{
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hwmon_fd = iohook_open_dummy_fd();
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iohook_push_handler(hwmon_handle_irp);
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}
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static HRESULT hwmon_handle_irp(struct irp *irp)
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{
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assert(irp != NULL);
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if (irp->op != IRP_OP_OPEN && irp->fd != hwmon_fd) {
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return iohook_invoke_next(irp);
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}
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switch (irp->op) {
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case IRP_OP_OPEN: return hwmon_handle_open(irp);
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case IRP_OP_CLOSE: return hwmon_handle_close(irp);
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case IRP_OP_IOCTL: return hwmon_handle_ioctl(irp);
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default: return HRESULT_FROM_WIN32(ERROR_INVALID_FUNCTION);
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}
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}
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static HRESULT hwmon_handle_open(struct irp *irp)
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{
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if (wcscmp(irp->open_filename, L"\\\\.\\sghwmonitor") != 0) {
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return iohook_invoke_next(irp);
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}
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dprintf("Hwmon: Opened device\n");
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irp->fd = hwmon_fd;
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return S_OK;
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}
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static HRESULT hwmon_handle_close(struct irp *irp)
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{
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dprintf("Hwmon: Closed device\n");
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return S_OK;
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}
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static HRESULT hwmon_handle_ioctl(struct irp *irp)
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{
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switch (irp->ioctl) {
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case HWMON_IOCTL_READ_CPU_TEMP:
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return hwmon_ioctl_read_cpu_temp(irp);
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default:
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dprintf("Hwmon: Unknown ioctl %08x write %i read %i\n",
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irp->ioctl,
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irp->write.nbytes,
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irp->read.nbytes);
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return HRESULT_FROM_WIN32(ERROR_INVALID_FUNCTION);
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}
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}
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static HRESULT hwmon_ioctl_read_cpu_temp(struct irp *irp)
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{
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/* Assuming this is Celsius. It also seems to be biased by -23 (based on the
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caller code) despite being a 32-bit int. */
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dprintf("Hwmon: Read CPU temperature\n");
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return iobuf_write_le32(&irp->read, 52);
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}
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