Programming gas "pseudo ops"
Posted: Sat Mar 20, 2010 11:46 pm
When I tried to rewrite my interrupt handlers, I found that writing gas "pseudo ops" is in fact very interesting. gas "pseudo ops" is much like a functional programming language, I don't know whether it's Turing complete
gas "pseudo ops" reference: http://sourceware.org/binutils/docs/as/ ... Pseudo-Ops
Here is how I implemented my 32 interrupt handlers(SAVE_GENERIC_REGISTER is 16 push instructions, LOAD_GENERIC_REGISTER is 16 pop instructions):
gas "pseudo ops" reference: http://sourceware.org/binutils/docs/as/ ... Pseudo-Ops
Here is how I implemented my 32 interrupt handlers(SAVE_GENERIC_REGISTER is 16 push instructions, LOAD_GENERIC_REGISTER is 16 pop instructions):
Code: Select all
#include <asm/LOAD_GENERIC_REGISTER.macro>
#include <asm/SAVE_GENERIC_REGISTER.macro>
.altmacro
.macro DEFINE_ISR isrNumber
isr\isrNumber:
cli
SAVE_GENERIC_REGISTER
mov $\isrNumber, %rdi
/* Mangled ::kernel::InterruptDescriptorTable::handle */
call _ZN6kernel24InterruptDescriptorTable6handleEi
LOAD_GENERIC_REGISTER
sti
iretq
.endm
.macro FOR from, to, action
action \from
.if \to - \from
FOR %(\from + 1), \to, action
.endif
.endm
.macro SET_ISR_ENTRY param
.quad isr\param
.endm
.macro CREATE_ISR_TABLE size, tableName
.section .text
FOR 0, %(\size - 1), DEFINE_ISR
.section .data
.global \tableName
.align 8
\tableName:
FOR 0, %(\size - 1), SET_ISR_ENTRY
.endm
CREATE_ISR_TABLE 32, isrAddressTable