| ... | ... | @@ -807,14 +807,7 @@ const StackIterator = union(enum) { |
| 807 | 807 | /// `@frameAddress` and `cpu_context.Native.current` as the caller's stack frame and |
| 808 | 808 | /// our own are one and the same. |
| 809 | 809 | inline fn init(opt_context_ptr: ?CpuContextPtr) error{CannotUnwindFromContext}!StackIterator { |
| 810 | | if (builtin.cpu.arch.isSPARC()) { |
| 811 | | // Flush all the register windows on stack. |
| 812 | | if (builtin.cpu.has(.sparc, .v9)) { |
| 813 | | asm volatile ("flushw" ::: .{ .memory = true }); |
| 814 | | } else { |
| 815 | | asm volatile ("ta 3" ::: .{ .memory = true }); // ST_FLUSH_WINDOWS |
| 816 | | } |
| 817 | | } |
| 810 | flushSparcWindows(); |
| 818 | 811 | if (opt_context_ptr) |context_ptr| { |
| 819 | 812 | if (SelfInfo == void or !SelfInfo.can_unwind) return error.CannotUnwindFromContext; |
| 820 | 813 | // Use `di_first` here so we report the PC in the context before unwinding any further. |
| ... | ... | @@ -842,6 +835,15 @@ const StackIterator = union(enum) { |
| 842 | 835 | } |
| 843 | 836 | } |
| 844 | 837 | |
| 838 | noinline fn flushSparcWindows() void { |
| 839 | // Flush all register windows except the current one (hence `noinline`). This ensures that |
| 840 | // we actually see meaningful data on the stack when we walk the frame chain. |
| 841 | if (comptime builtin.target.cpu.has(.sparc, .v9)) |
| 842 | asm volatile ("flushw" ::: .{ .memory = true }) |
| 843 | else |
| 844 | asm volatile ("ta 3" ::: .{ .memory = true }); // ST_FLUSH_WINDOWS |
| 845 | } |
| 846 | |
| 845 | 847 | const FpUsability = enum { |
| 846 | 848 | /// FP unwinding is impractical on this target. For example, due to its very silly ABI |
| 847 | 849 | /// design decisions, it's not possible to do generic FP unwinding on MIPS without a |
Alex Rønne Petersen <alex@alexrp.com> 2025-10-14 09:37:51+02:00
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lib