UnwindContext

pub const UnwindContext = struct

File

Code

pub const UnwindContext = struct {
    pc: usize,
    cur: windows.CONTEXT,
    history_table: windows.UNWIND_HISTORY_TABLE,
    pub fn init(ctx: *const std.debug.cpu_context.Native) UnwindContext {
        return .{
            .pc = @returnAddress(),
            .cur = switch (builtin.cpu.arch) {
                .x86_64 => std.mem.zeroInit(windows.CONTEXT, .{
                    .Rax = ctx.gprs.get(.rax),
                    .Rcx = ctx.gprs.get(.rcx),
                    .Rdx = ctx.gprs.get(.rdx),
                    .Rbx = ctx.gprs.get(.rbx),
                    .Rsp = ctx.gprs.get(.rsp),
                    .Rbp = ctx.gprs.get(.rbp),
                    .Rsi = ctx.gprs.get(.rsi),
                    .Rdi = ctx.gprs.get(.rdi),
                    .R8 = ctx.gprs.get(.r8),
                    .R9 = ctx.gprs.get(.r9),
                    .R10 = ctx.gprs.get(.r10),
                    .R11 = ctx.gprs.get(.r11),
                    .R12 = ctx.gprs.get(.r12),
                    .R13 = ctx.gprs.get(.r13),
                    .R14 = ctx.gprs.get(.r14),
                    .R15 = ctx.gprs.get(.r15),
                    .Rip = ctx.gprs.get(.rip),
                }),
                .aarch64 => .{
                    .ContextFlags = 0,
                    .Cpsr = 0,
                    .DUMMYUNIONNAME = .{ .X = ctx.x },
                    .Sp = ctx.sp,
                    .Pc = ctx.pc,
                    .V = @splat(.{ .B = @splat(0) }),
                    .Fpcr = 0,
                    .Fpsr = 0,
                    .Bcr = @splat(0),
                    .Bvr = @splat(0),
                    .Wcr = @splat(0),
                    .Wvr = @splat(0),
                },
                .thumb => .{
                    .ContextFlags = 0,
                    .R0 = ctx.r[0],
                    .R1 = ctx.r[1],
                    .R2 = ctx.r[2],
                    .R3 = ctx.r[3],
                    .R4 = ctx.r[4],
                    .R5 = ctx.r[5],
                    .R6 = ctx.r[6],
                    .R7 = ctx.r[7],
                    .R8 = ctx.r[8],
                    .R9 = ctx.r[9],
                    .R10 = ctx.r[10],
                    .R11 = ctx.r[11],
                    .R12 = ctx.r[12],
                    .Sp = ctx.r[13],
                    .Lr = ctx.r[14],
                    .Pc = ctx.r[15],
                    .Cpsr = 0,
                    .Fpcsr = 0,
                    .Padding = 0,
                    .DUMMYUNIONNAME = .{ .S = @splat(0) },
                    .Bvr = @splat(0),
                    .Bcr = @splat(0),
                    .Wvr = @splat(0),
                    .Wcr = @splat(0),
                    .Padding2 = @splat(0),
                },
                else => comptime unreachable,
            },
            .history_table = std.mem.zeroes(windows.UNWIND_HISTORY_TABLE),
        };
    }
    pub fn deinit(ctx: *UnwindContext) void {
        _ = ctx;
    }
    pub fn getFp(ctx: *UnwindContext) usize {
        return ctx.cur.getRegs().bp;
    }
}