FreeBSD 11.4 Errno Matrix & Syscall Precedence Simulator

Showing 0 of 96 error codes ELAST Limit: 96

Code	Constant	Category	Description	Typical Syscall Sources

Syscall Error Precedence Simulator

In FreeBSD kernel execution, argument and state validation follows strict precedence rules (e.g., pointer validation before descriptor validation, and descriptor validation before buffer bounds checking). Test how simulated syscall inputs trigger specific errnos.

Simulated Syscall Parameters

Syscall Target

Invalid Pointer / Unmapped Address (EFAULT)

Invalid File Descriptor (EBADF)

Invalid Argument / Bad Flags (EINVAL)

Permission Denied / Restricted (EACCES / EPERM)

Available Memory / Limit State

Kernel Validation Pipeline

Triggered Errno Result:

FreeBSD 11.4 ELAST & Boundary Analysis

FreeBSD defines error numbers ranging from 1 up to ELAST. In FreeBSD 11.4, ELAST is set to 96 (`ENOTRECOVERABLE`). Any values beyond ELAST or unmapped gaps require careful bounds checking in relinkers and syscall translation layers.

96 ELAST Value

1 - 96 Standard POSIX / FreeBSD Range

0.0% Gap Rate (Fully Dense up to 96)

Boundary Verification Tool

Enter an integer to inspect whether it falls within valid FreeBSD 11.4 errno space.