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