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Kernel+LibC: Add minherit() and MAP_INHERIT_ZERO

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This patch adds the minherit() syscall originally invented by OpenBSD.
Only the MAP_INHERIT_ZERO mode is supported for now. If set on an mmap
region, that region will be zeroed out on fork().
This commit is contained in:
Andreas Kling 2020-04-12 20:22:26 +02:00
parent dd00175ae2
commit c19b56dc99
8 changed files with 58 additions and 1 deletions
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2
Kernel/UnixTypes.h
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@ -67,6 +67,8 @@
#define MADV_SET_NONVOLATILE 0x200
#define MADV_GET_VOLATILE 0x400
#define MAP_INHERIT_ZERO 1
#define F_DUPFD 0
#define F_GETFD 1
#define F_SETFD 2