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how to use gp relative adressing in GASM for mips

my problem is very simple. I'm uisng GCC for mips, and , I have to do a small part of the code in assembly

I have my $(gp) register correctly set to the _gp section -in the midle of the sda section

I have one variable defined like that

.sdata usbMaxPipeNum: .word 0xFFFFFFFF

and now, in my source, I would like to load $t8 with the content of usbMaxPipeNum, using the gp relative adressing I tried lw $t8, (usbMaxPipeNum) $(gp) the result is Error: illegal operands `lw $t8,usbMaxPipeNum $(gp)'

I tried to add .extern _gp in the .sdata section and then lw $t8, (usbMaxPipeNum - _gp) $(gp) the result is illegal operands `lw $t8,(usbMaxPipeNum-_gp)$(gp)'

what is the correct syntax to do what I want ? thanks in advance for your help

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jean nemar
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