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compiler_rt: provide strncpy impl for ssp

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This commit is contained in:
Andrew Kelley 2023-11-06 23:59:03 -07:00
parent 53f74d6a04
commit dfee782d7c
1 changed files with 9 additions and 2 deletions
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11
lib/compiler_rt/ssp.zig
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@ -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 {