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83 lines
2.3 KiB
C
83 lines
2.3 KiB
C
/*
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* linux-user semihosting checks
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*
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* Copyright (c) 2019
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* Written by Alex Bennée <alex.bennee@linaro.org>
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*
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* SPDX-License-Identifier: GPL-3.0-or-later
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*/
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#define SYS_WRITE0 0x04
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#define SYS_HEAPINFO 0x16
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#define SYS_REPORTEXC 0x18
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#include <stdint.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include "semicall.h"
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int main(int argc, char *argv[argc])
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{
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#if UINTPTR_MAX == UINT32_MAX
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uintptr_t exit_code = 0x20026;
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#else
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uintptr_t exit_block[2] = {0x20026, 0};
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uintptr_t exit_code = (uintptr_t) &exit_block;
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#endif
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struct {
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void *heap_base;
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void *heap_limit;
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void *stack_base;
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void *stack_limit;
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} info;
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void *ptr_to_info = (void *) &info;
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__semi_call(SYS_WRITE0, (uintptr_t) "Checking HeapInfo\n");
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memset(&info, 0, sizeof(info));
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__semi_call(SYS_HEAPINFO, (uintptr_t) &ptr_to_info);
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if (info.heap_base == NULL || info.heap_limit == NULL) {
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printf("null heap: %p -> %p\n", info.heap_base, info.heap_limit);
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exit(1);
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}
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/* Error if heap base is above limit */
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if ((uintptr_t) info.heap_base >= (uintptr_t) info.heap_limit) {
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printf("heap base %p >= heap_limit %p\n",
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info.heap_base, info.heap_limit);
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exit(2);
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}
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if (info.stack_base == NULL || info.stack_limit) {
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printf("null stack: %p -> %p\n", info.stack_base, info.stack_limit);
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exit(3);
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}
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/* check our local variables are indeed inside the reported stack */
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if (ptr_to_info > info.stack_base) {
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printf("info appears to be above stack: %p > %p\n", ptr_to_info,
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info.stack_base);
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exit(4);
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} else if (ptr_to_info < info.stack_limit) {
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printf("info appears to be outside stack: %p < %p\n", ptr_to_info,
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info.stack_limit);
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exit(5);
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}
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if (ptr_to_info > info.heap_base && ptr_to_info < info.heap_limit) {
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printf("info appears to be inside the heap: %p in %p:%p\n",
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ptr_to_info, info.heap_base, info.heap_limit);
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exit(6);
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}
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printf("heap: %p -> %p\n", info.heap_base, info.heap_limit);
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printf("stack: %p -> %p\n", info.stack_base, info.stack_limit);
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__semi_call(SYS_WRITE0, (uintptr_t) "Passed HeapInfo checks");
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__semi_call(SYS_REPORTEXC, exit_code);
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/* if we get here we failed */
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return -1;
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}
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