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[libc] fix rv32 mmap in auxv library #162519

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Merged
merged 1 commit into from
Oct 8, 2025
Merged

[libc] fix rv32 mmap in auxv library #162519

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7 changes: 6 additions & 1 deletion libc/src/__support/OSUtil/linux/auxv.h
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Original file line number Diff line number Diff line change
Expand Up @@ -81,7 +81,12 @@ LIBC_INLINE void Vector::initialize_unsafe(const Entry *auxv) {
[[gnu::cold]]
LIBC_INLINE void Vector::fallback_initialize_unsync() {
constexpr size_t AUXV_MMAP_SIZE = FALLBACK_AUXV_ENTRIES * sizeof(Entry);
long mmap_ret = syscall_impl<long>(SYS_mmap, nullptr, AUXV_MMAP_SIZE,
#ifdef SYS_mmap2
constexpr int MMAP_SYSNO = SYS_mmap2;
#else
constexpr int MMAP_SYSNO = SYS_mmap;
#endif
long mmap_ret = syscall_impl<long>(MMAP_SYSNO, nullptr, AUXV_MMAP_SIZE,
PROT_READ | PROT_WRITE,
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
// We do not proceed if mmap fails.
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