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std.debug: fix FP unwinding for hppa/hppa64

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Alex Rønne Petersen 2025-10-20 03:45:20 +02:00
parent c13355abda
commit d8cb8b7bae
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1 changed files with 10 additions and 0 deletions
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lib/std/debug.zig
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@ -994,6 +994,11 @@ const StackIterator = union(enum) {
/// Offset of the saved base pointer (previous frame pointer) wrt the frame pointer. /// Offset of the saved base pointer (previous frame pointer) wrt the frame pointer.
const fp_to_bp_offset = off: { const fp_to_bp_offset = off: {
// On 32-bit PA-RISC, the base pointer is the final word of the frame marker.
if (native_arch == .hppa) break :off -1 * @sizeOf(usize);
// On 64-bit PA-RISC, the frame marker was shrunk significantly; now there's just the return
// address followed by the base pointer.
if (native_arch == .hppa64) break :off -1 * @sizeOf(usize);
// On LoongArch and RISC-V, the frame pointer points to the top of the saved register area, // On LoongArch and RISC-V, the frame pointer points to the top of the saved register area,
// in which the base pointer is the first word. // in which the base pointer is the first word.
if (native_arch.isLoongArch() or native_arch.isRISCV()) break :off -2 * @sizeOf(usize); if (native_arch.isLoongArch() or native_arch.isRISCV()) break :off -2 * @sizeOf(usize);
@ -1008,6 +1013,11 @@ const StackIterator = union(enum) {
/// Offset of the saved return address wrt the frame pointer. /// Offset of the saved return address wrt the frame pointer.
const fp_to_ra_offset = off: { const fp_to_ra_offset = off: {
// On 32-bit PA-RISC, the return address sits in the middle-ish of the frame marker.
if (native_arch == .hppa) break :off -5 * @sizeOf(usize);
// On 64-bit PA-RISC, the frame marker was shrunk significantly; now there's just the return
// address followed by the base pointer.
if (native_arch == .hppa64) break :off -2 * @sizeOf(usize);
// On LoongArch and RISC-V, the frame pointer points to the top of the saved register area, // On LoongArch and RISC-V, the frame pointer points to the top of the saved register area,
// in which the return address is the second word. // in which the return address is the second word.
if (native_arch.isLoongArch() or native_arch.isRISCV()) break :off -1 * @sizeOf(usize); if (native_arch.isLoongArch() or native_arch.isRISCV()) break :off -1 * @sizeOf(usize);