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annotate arch/svcint.S @ 95:cabcdc3727e3

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arch: implemented swapcontext & fixed few minor issues
author Josef 'Jeff' Sipek <jeffpc@josefsipek.net>
date Thu, 12 May 2011 15:56:46 -0400
parents 5f3618fbf9ae
children
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ca308c8ca41e beginning of svc support code
Josef 'Jeff' Sipek <jeffpc@josefsipek.net>
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1 #include "svcint.h"
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2
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3 .text
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4 .align 4
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5 .globl SVCINT
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6 .type SVCINT, @function
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7 SVCINT:
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8 stmg %r0,%r15,_PSA_GPRS
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9
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10 xgr %r2,%r2
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11 ic %r2,_PSA_SVC_ID+3 # r2 = SVC
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12 lmg %r3,%r6,_PSA_GPRS+16 # shift all the args
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13 xgr %r7,%r7 # just to make sure accesses to more
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14 # than 4 args fail
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15 larl %r15,_SVC_STACK
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5f3618fbf9ae arch: fix SVC interrupt handler
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16 lg %r15,0(%r15)
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17
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18 # call into C... f(svc, arg0, arg1, arg2, arg3)
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19 larl %r14,_SVC_HANDLER
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5f3618fbf9ae arch: fix SVC interrupt handler
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20 lg %r14,0(%r14)
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21 basr %r14,%r14
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22
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cabcdc3727e3 arch: implemented swapcontext & fixed few minor issues
Josef 'Jeff' Sipek <jeffpc@josefsipek.net>
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23 sr %r1,%r1
cabcdc3727e3 arch: implemented swapcontext & fixed few minor issues
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24 sr %r3,%r3
cabcdc3727e3 arch: implemented swapcontext & fixed few minor issues
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25 sigp %r1,%r3,0x05
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26
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cabcdc3727e3 arch: implemented swapcontext & fixed few minor issues
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27 .byte 0x00, 0x00, 0x00, 0x00