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Update background.md

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typo
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Remzi Arpaci-Dusseau
2020-07-18 08:02:45 -05:00
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parent f2650cf274
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initial-xv6/background.md
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@@ -49,7 +49,7 @@ read:
File: **usys.S** File: **usys.S**
Here we can see that the **read()** library function actually doesn't do much Here we can see that the **read()** library function actually doesn't do much
at all; it moves the value 5 into the register **%eax** and issues the x86 at all; it moves the value 6 into the register **%eax** and issues the x86
trap instruction which is confusingly called **int** (short for *interrupt*). trap instruction which is confusingly called **int** (short for *interrupt*).
The value in **%eax** is going to be used by the kernel to *vector* to the The value in **%eax** is going to be used by the kernel to *vector* to the
right system call, i.e., it determines which system call is being invoked. The right system call, i.e., it determines which system call is being invoked. The