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// SPDX-License-Identifier: MPL-2.0
// (c) Hare authors <https://harelang.org>
use rt;
def AARCH64_FP: uint = 29; // fp is an alias of r29
def AARCH64_LR: uint = 30; // lr is an alias of r30
// Returns the stack pointer from a ucontext.
fn uctx_sp(uctx: *opaque) uintptr = {
const uctx = uctx: *rt::ucontext_t;
return uctx.uc_mcontext.sp: uintptr;
};
// Returns the instruction pointer from a ucontext.
fn uctx_ip(uctx: *opaque) uintptr = {
const uctx = uctx: *rt::ucontext_t;
return uctx.uc_mcontext.pc: uintptr;
};
// Returns the current call frame from a ucontext.
fn uctx_frame(uctx: *opaque) stackframe = {
const uctx = uctx: *rt::ucontext_t;
return *(uctx.uc_mcontext.regs[AARCH64_FP]: uintptr: *stackframe);
};
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