68 lines
1.8 KiB
C
68 lines
1.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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#ifndef _TESTCASES_MMAP_TEST_H
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#define _TESTCASES_MMAP_TEST_H
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#include <sys/mman.h>
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#include <sys/resource.h>
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#include <stddef.h>
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#define TOP_DOWN 0
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#define BOTTOM_UP 1
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struct addresses {
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int *no_hint;
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int *on_37_addr;
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int *on_38_addr;
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int *on_46_addr;
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int *on_47_addr;
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int *on_55_addr;
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int *on_56_addr;
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};
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// Only works on 64 bit
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#if __riscv_xlen == 64
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static inline void do_mmaps(struct addresses *mmap_addresses)
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{
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/*
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* Place all of the hint addresses on the boundaries of mmap
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* sv39, sv48, sv57
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* User addresses end at 1<<38, 1<<47, 1<<56 respectively
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*/
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void *on_37_bits = (void *)(1UL << 37);
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void *on_38_bits = (void *)(1UL << 38);
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void *on_46_bits = (void *)(1UL << 46);
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void *on_47_bits = (void *)(1UL << 47);
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void *on_55_bits = (void *)(1UL << 55);
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void *on_56_bits = (void *)(1UL << 56);
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int prot = PROT_READ | PROT_WRITE;
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int flags = MAP_PRIVATE | MAP_ANONYMOUS;
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mmap_addresses->no_hint =
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mmap(NULL, 5 * sizeof(int), prot, flags, 0, 0);
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mmap_addresses->on_37_addr =
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mmap(on_37_bits, 5 * sizeof(int), prot, flags, 0, 0);
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mmap_addresses->on_38_addr =
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mmap(on_38_bits, 5 * sizeof(int), prot, flags, 0, 0);
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mmap_addresses->on_46_addr =
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mmap(on_46_bits, 5 * sizeof(int), prot, flags, 0, 0);
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mmap_addresses->on_47_addr =
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mmap(on_47_bits, 5 * sizeof(int), prot, flags, 0, 0);
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mmap_addresses->on_55_addr =
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mmap(on_55_bits, 5 * sizeof(int), prot, flags, 0, 0);
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mmap_addresses->on_56_addr =
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mmap(on_56_bits, 5 * sizeof(int), prot, flags, 0, 0);
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}
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#endif /* __riscv_xlen == 64 */
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static inline int memory_layout(void)
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{
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int prot = PROT_READ | PROT_WRITE;
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int flags = MAP_PRIVATE | MAP_ANONYMOUS;
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void *value1 = mmap(NULL, sizeof(int), prot, flags, 0, 0);
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void *value2 = mmap(NULL, sizeof(int), prot, flags, 0, 0);
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return value2 > value1;
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}
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#endif /* _TESTCASES_MMAP_TEST_H */
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