# Trap Home Page

## RISC-V trap machinery

{% content-ref url="/pages/-M4f4umOXQLM--2dmp-H" %}
[What is trampoline](/build_a_os/traps-and-interrupts/untitled-3.md)
{% endcontent-ref %}

{% content-ref url="/pages/-M4f4uBfm2Ua8uXLmsWU" %}
[What is trapframe](/build_a_os/traps-and-interrupts/untitled-2.md)
{% endcontent-ref %}

## Traps from Kernel Space

{% content-ref url="/pages/-M4f9lIYgqvIMLdZRgLz" %}
[Traps from kernel space](/build_a_os/traps-and-interrupts/traps-from-kernel-space.md)
{% endcontent-ref %}

## Traps from User Space

{% content-ref url="/pages/-M1ITenaXBqQJbTySQCI" %}
[How system calls get into/out of the kernel](/build_a_os/traps-and-interrupts/untitled.md)
{% endcontent-ref %}

## How `exec` works

{% content-ref url="/pages/-M4fDUURc-qZ9I\_ytOp8" %}
[How exec() works](/build_a_os/traps-and-interrupts/how-exec-works.md)
{% endcontent-ref %}

## How fork works

{% content-ref url="/pages/-M4f9keh0yFllRNKArCm" %}
[How fork() works](/build_a_os/traps-and-interrupts/how-fork-works.md)
{% endcontent-ref %}


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