From 86087e5f9cf4a0512ba36b4d01086b905574a47d Mon Sep 17 00:00:00 2001 From: Mattias Andrée Date: Mon, 11 May 2026 23:15:33 +0200 Subject: Misc MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: Mattias Andrée --- libtest/mmap.c | 27 ++++++++++++++++----------- 1 file changed, 16 insertions(+), 11 deletions(-) (limited to 'libtest/mmap.c') diff --git a/libtest/mmap.c b/libtest/mmap.c index d8a2a60..62ef06e 100644 --- a/libtest/mmap.c +++ b/libtest/mmap.c @@ -2,33 +2,38 @@ #include "common.h" #ifndef TEST -#include - - #if !defined(__linux__) # errno "Don't know how to implement mmap(3), mumap(3), and mremap(3)" #endif +#ifdef SYS_mmap2 +# define IF_MMAP2(A) (A) +#else +# define IF_MMAP2(A) ((void)0) +#endif + +#if defined(__x86_64__) && defined(__ILP32__) /* x32 */ +# define SYSCALL_ARG_MAX LLONG_MAX +#else +# define SYSCALL_ARG_MAX LONG_MAX +#endif + + void * libtest_real_mmap(void *addr, size_t len, int prot, int flags, int fd, off_t off) { size_t pagesize = libtest_get_pagesize(); + IF_MMAP2(assert(pagesize == 4096u)); if (off < 0 || off % (off_t)pagesize) goto einval; - off /= (off_t)pagesize; + IF_MMAP2(off /= (off_t)pagesize); -#if defined(__x86_64__) && defined(__ILP32__) /* x32 */ - if (off > LLONG_MAX) + if (off > SYSCALL_ARG_MAX) goto einval; -#else - if (off > LONG_MAX) - goto einval; -#endif #ifdef SYS_mmap2 - assert(pagesize == 4096u); return (void *)syscall(SYS_mmap2, addr, len, prot, flags, fd, off); #else return (void *)syscall(SYS_mmap, addr, len, prot, flags, fd, off); -- cgit v1.2.3-70-g09d2