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2a709f28fa
* 0day explit mitigation * Memory corruption prevention * Privilege escalation prevention * Buffer over flow prevention * File System corruption defense * Thread escape prevention This may very well be the most intensive inclusion to BrooklynR. This will not be part of an x86 suite nor it will be released as tool kit. The security core toolkit will remain part of kernel base.
66 lines
2.2 KiB
C
66 lines
2.2 KiB
C
/**
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* \file drm_os_linux.h
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* OS abstraction macros.
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*/
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#include <linux/interrupt.h> /* For task queue support */
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#include <linux/delay.h>
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#ifndef readq
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static inline u64 readq(void __iomem *reg)
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{
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return ((u64) readl(reg)) | (((u64) readl(reg + 4UL)) << 32);
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}
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static inline void writeq(u64 val, void __iomem *reg)
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{
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writel(val & 0xffffffff, reg);
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writel(val >> 32, reg + 0x4UL);
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}
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#endif
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/** Current process ID */
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#define DRM_CURRENTPID task_pid_nr(current)
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#define DRM_UDELAY(d) udelay(d)
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/** Read a byte from a MMIO region */
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#define DRM_READ8(map, offset) readb(((void __iomem *)(map)->handle) + (offset))
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/** Read a word from a MMIO region */
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#define DRM_READ16(map, offset) readw(((void __iomem *)(map)->handle) + (offset))
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/** Read a dword from a MMIO region */
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#define DRM_READ32(map, offset) readl(((void __iomem *)(map)->handle) + (offset))
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/** Write a byte into a MMIO region */
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#define DRM_WRITE8(map, offset, val) writeb(val, ((void __iomem *)(map)->handle) + (offset))
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/** Write a word into a MMIO region */
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#define DRM_WRITE16(map, offset, val) writew(val, ((void __iomem *)(map)->handle) + (offset))
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/** Write a dword into a MMIO region */
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#define DRM_WRITE32(map, offset, val) writel(val, ((void __iomem *)(map)->handle) + (offset))
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/** Read a qword from a MMIO region - be careful using these unless you really understand them */
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#define DRM_READ64(map, offset) readq(((void __iomem *)(map)->handle) + (offset))
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/** Write a qword into a MMIO region */
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#define DRM_WRITE64(map, offset, val) writeq(val, ((void __iomem *)(map)->handle) + (offset))
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#define DRM_WAIT_ON( ret, queue, timeout, condition ) \
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do { \
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DECLARE_WAITQUEUE(entry, current); \
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unsigned long end = jiffies + (timeout); \
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add_wait_queue(&(queue), &entry); \
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\
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for (;;) { \
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__set_current_state(TASK_INTERRUPTIBLE); \
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if (condition) \
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break; \
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if (time_after_eq(jiffies, end)) { \
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ret = -EBUSY; \
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break; \
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} \
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schedule_timeout((HZ/100 > 1) ? HZ/100 : 1); \
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if (signal_pending(current)) { \
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ret = -EINTR; \
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break; \
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} \
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} \
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__set_current_state(TASK_RUNNING); \
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remove_wait_queue(&(queue), &entry); \
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} while (0)
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