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| author | Andrew Kelley <andrew@ziglang.org> | 2023-11-06 23:59:03 -0700 |
|---|---|---|
| committer | Andrew Kelley <andrew@ziglang.org> | 2023-11-10 13:12:16 -0700 |
| commit | dfee782d7c30e2ff84060833be375e8cdf92e3be (patch) | |
| tree | 1d3c1a7b2cb86ac4648c2279be5df9e669eb3968 /lib/compiler_rt/ssp.zig | |
| parent | 53f74d6a04377c9e0d7c3affd32fceea0fd51454 (diff) | |
| download | zig-dfee782d7c30e2ff84060833be375e8cdf92e3be.tar.gz zig-dfee782d7c30e2ff84060833be375e8cdf92e3be.zip | |
compiler_rt: provide strncpy impl for ssp
Diffstat (limited to 'lib/compiler_rt/ssp.zig')
| -rw-r--r-- | lib/compiler_rt/ssp.zig | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/lib/compiler_rt/ssp.zig b/lib/compiler_rt/ssp.zig index b656d52afa..236428e1ca 100644 --- a/lib/compiler_rt/ssp.zig +++ b/lib/compiler_rt/ssp.zig @@ -16,7 +16,6 @@ const std = @import("std"); const common = @import("./common.zig"); const builtin = @import("builtin"); -extern fn strncpy(dest: [*:0]u8, src: [*:0]const u8, n: usize) callconv(.C) [*:0]u8; extern fn memset(dest: ?[*]u8, c: u8, n: usize) callconv(.C) ?[*]u8; extern fn memcpy(noalias dest: ?[*]u8, noalias src: ?[*]const u8, n: usize) callconv(.C) ?[*]u8; extern fn memmove(dest: ?[*]u8, src: ?[*]const u8, n: usize) callconv(.C) ?[*]u8; @@ -66,8 +65,16 @@ fn __strcpy_chk(dest: [*:0]u8, src: [*:0]const u8, dest_n: usize) callconv(.C) [ } fn __strncpy_chk(dest: [*:0]u8, src: [*:0]const u8, n: usize, dest_n: usize) callconv(.C) [*:0]u8 { + @setRuntimeSafety(false); if (dest_n < n) __chk_fail(); - return strncpy(dest, src, n); + var i: usize = 0; + while (i < n and src[i] != 0) : (i += 1) { + dest[i] = src[i]; + } + while (i < n) : (i += 1) { + dest[i] = 0; + } + return dest; } fn __strcat_chk(dest: [*:0]u8, src: [*:0]const u8, dest_n: usize) callconv(.C) [*:0]u8 { |