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66 lines
2.1 KiB
66 lines
2.1 KiB
/*
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* Copyright 2002-2019 Intel Corporation.
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*
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* This software is provided to you as Sample Source Code as defined in the accompanying
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* End User License Agreement for the Intel(R) Software Development Products ("Agreement")
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* section 1.L.
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*
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* This software and the related documents are provided as is, with no express or implied
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* warranties, other than those that are expressly stated in the License.
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*/
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/*! @file
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* An example of SMC application.
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*/
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#include "smc_util.h"
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#include "../Utils/sys_memory.h"
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#include <stdio.h>
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#if defined(TARGET_MAC)
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//# include <mach/mach.h>
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# define CODE_SECTION_MAC(name) __attribute__ ((section ("__TEXT, " name)))
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#else
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// No need at the moment for other OS's.
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# define CODE_SECTION_MAC(name)
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#endif
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/*!
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* Exit with the specified error message
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*/
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static void Abort(string msg)
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{
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fprintf (stderr, "%s\n", msg.c_str());
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exit(1);
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}
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/*!
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* The main procedure of the application.
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*/
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int main(int argc, char *argv[])
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{
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fprintf (stderr, "Code executed from writable page\n");
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// buffer to move foo/bar routines into and execute
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// Starting from macOS 10.15, statically allocated memory doesn't have execute permission and cannot be modified to have
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// execute permission. Therefore adding compiler annotation to mark this buffer as a text section which will grant him
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// execute permission.
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static char staticBuffer[PI_FUNC::MAX_SIZE] CODE_SECTION_MAC("executable_buf");
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// Set read-write-execute protection for the buffer
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size_t pageSize = GetPageSize();
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char * firstPage = (char *)(((size_t)staticBuffer) & ~(pageSize - 1));
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char * endPage = (char *)(((size_t)staticBuffer + sizeof(staticBuffer) + pageSize - 1) & ~(pageSize - 1));
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if (!MemProtect(firstPage, endPage - firstPage, MEM_READ_WRITE_EXEC)) {Abort("MemProtect failed");}
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FOO_FUNC fooFunc;
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fooFunc.Copy(staticBuffer).Execute().AssertStatus();
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return 0;
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}
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/* ===================================================================== */
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/* eof */
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/* ===================================================================== */
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