a32b5929cc
* introduce zigrt file. it contains only weak symbols so that multiple instances can be merged. it contains __zig_panic so that multiple .o files can call the same panic function. * remove `@setFnVisible` builtin and add @setGlobalLinkage builtin which is more powerful * add `@panic` builtin function. * fix collision of symbols with extern prototypes and internal function names * add stack protector safety when linking against libc. To add the safety mechanism without libc requires implementing Thread Local Storage. See #276
36 lines
876 B
Zig
36 lines
876 B
Zig
// These functions are provided when not linking against libc because LLVM
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// sometimes generates code that calls them.
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// Note that these functions do not return `dest`, like the libc API.
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// The semantics of these functions is dictated by the corresponding
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// LLVM intrinsics, not by the libc API.
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export fn memset(dest: ?&u8, c: u8, n: usize) {
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@setDebugSafety(this, false);
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if (n == 0)
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return;
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const d = ??dest;
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var index: usize = 0;
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while (index != n; index += 1)
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d[index] = c;
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}
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export fn memcpy(noalias dest: ?&u8, noalias src: ?&const u8, n: usize) {
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@setDebugSafety(this, false);
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if (n == 0)
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return;
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const d = ??dest;
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const s = ??src;
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var index: usize = 0;
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while (index != n; index += 1)
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d[index] = s[index];
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}
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export fn __stack_chk_fail() {
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@panic("stack smashing detected");
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}
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