mirror of https://github.com/n1nj4sec/pupy.git
47 lines
979 B
C
47 lines
979 B
C
#ifndef _PUPY_MEMFD_H
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#define _PUPY_MEMFD_H
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#define _GNU_SOURCE
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#include <sys/syscall.h>
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#include <string.h>
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#include <stdbool.h>
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#define MFD_CLOEXEC 0x0001U
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#define MFD_ALLOW_SEALING 0x0002U
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#ifndef __NR_memfd_create
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#ifdef __x86_64__
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#define __NR_memfd_create 319
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#elif __i386__
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#define __NR_memfd_create 356
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#endif
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#endif
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#ifndef F_ADD_SEALS
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#define F_ADD_SEALS (1024 + 9)
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#define F_SEAL_SEAL 0x0001
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#define F_SEAL_SHRINK 0x0002
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#define F_SEAL_GROW 0x0004
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#define F_SEAL_WRITE 0x0008
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#endif
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#define MEMFD_FILE_PATH "/proc/self/fd/"
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inline static int pupy_memfd_create(char *path, unsigned int path_size)
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{
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int fd = syscall(__NR_memfd_create, "heap", MFD_CLOEXEC | MFD_ALLOW_SEALING);
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if (fd == -1) {
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return -1;
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}
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snprintf(path, path_size, MEMFD_FILE_PATH "%d", fd);
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return fd;
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}
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inline static bool is_memfd_path(const char *path)
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{
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return !strncmp(path, MEMFD_FILE_PATH, strlen(MEMFD_FILE_PATH));
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}
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#endif
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