769af57274
. new mode for sys_memset: include process so memset can be done in physical or virtual address space. . add a mode to mmap() that lets a process allocate uninitialized memory. . this allows an exec()er (RS, VFS, etc.) to request uninitialized memory from VM and selectively clear the ranges that don't come from a file, leaving no uninitialized memory left for the process to see. . use callbacks for clearing the process, clearing memory in the process, and copying into the process; so that the libexec code can be used from rs, vfs, and in the future, kernel (to load vm) and vm (to load boot-time processes)
19 lines
354 B
C
19 lines
354 B
C
#include "syslib.h"
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int sys_memset(endpoint_t who, unsigned long pattern,
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phys_bytes base, phys_bytes bytes)
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{
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/* Zero a block of data. */
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message mess;
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if (bytes == 0L) return(OK);
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mess.MEM_PTR = (char *) base;
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mess.MEM_COUNT = bytes;
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mess.MEM_PATTERN = pattern;
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mess.MEM_PROCESS = who;
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return(_kernel_call(SYS_MEMSET, &mess));
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}
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