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Guard against corruption of top half of %esp during UNDI ISR

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Michael Brown
2008-02-13 14:58:20 +00:00
parent c1006ffdb7
commit 385b7a623d
1 changed files with 3 additions and 0 deletions
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3
src/arch/i386/drivers/net/undiisr.S
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@@ -64,7 +64,10 @@ chain: /* Chain to next handler */
lcall *undiisr_next_handler lcall *undiisr_next_handler
exit: /* Restore registers and return */ exit: /* Restore registers and return */
cli
popal popal
movzwl %sp, %esp
addr32 movl -20(%esp), %esp /* %esp isn't restored by popal */
popfl popfl
popw %gs popw %gs
popw %fs popw %fs