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| author | PkmX via Newlib <newlib@sourceware.org> | 2020-07-24 19:07:45 +0800 |
|---|---|---|
| committer | Corinna Vinschen <corinna@vinschen.de> | 2020-07-27 10:14:34 +0200 |
| commit | 123b8065237a3fb644528d3e95216ade336334bd (patch) | |
| tree | 45fa660896664f4669339956a7fb626e8666946e /newlib | |
| parent | 0947efb859110d0bbe4b6f1ddc9a762613e662a8 (diff) | |
| download | newlib-123b8065237a3fb644528d3e95216ade336334bd.zip newlib-123b8065237a3fb644528d3e95216ade336334bd.tar.gz newlib-123b8065237a3fb644528d3e95216ade336334bd.tar.bz2 | |
riscv: fix integer wraparound in memcpy
This patch fixes a bug in RISC-V's memcpy implementation where an
integer wraparound occurs when src + size < 8 * sizeof(long), causing
the word-sized copy loop to be incorrectly entered.
Signed-off-by: Chih-Mao Chen <cmchen@andestech.com>
Diffstat (limited to 'newlib')
| -rw-r--r-- | newlib/libc/machine/riscv/memcpy.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/newlib/libc/machine/riscv/memcpy.c b/newlib/libc/machine/riscv/memcpy.c index 07e8e00..4098f3a 100644 --- a/newlib/libc/machine/riscv/memcpy.c +++ b/newlib/libc/machine/riscv/memcpy.c @@ -51,9 +51,9 @@ small: const long *lb = (const long *)b; long *lend = (long *)((uintptr_t)end & ~msk); - if (unlikely (la < (lend - 8))) + if (unlikely (lend - la > 8)) { - while (la < (lend - 8)) + while (lend - la > 8) { long b0 = *lb++; long b1 = *lb++; |