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std.debug: FP-based unwinding is impossible on avr, csky, msp430, and xcore

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The ABIs do not define a frame pointer register, nor do they define a guaranteed
and fixed area on the stack where one might find saved registers such as a frame
pointer or return address.
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Alex Rønne Petersen 2025-10-16 13:50:39 +02:00
parent 1f8a72175b
commit 2eca0e42e5
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lib/std/debug.zig
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@ -872,10 +872,14 @@ const StackIterator = union(enum) {
}; };
const fp_usability: FpUsability = switch (builtin.target.cpu.arch) { const fp_usability: FpUsability = switch (builtin.target.cpu.arch) {
.avr,
.csky,
.mips, .mips,
.mipsel, .mipsel,
.mips64, .mips64,
.mips64el, .mips64el,
.msp430,
.xcore,
=> .useless, => .useless,
.hexagon, .hexagon,
// The PowerPC ABIs don't actually strictly require a backchain pointer; they allow omitting // The PowerPC ABIs don't actually strictly require a backchain pointer; they allow omitting