355 lines
5.5 KiB
ArmAsm
355 lines
5.5 KiB
ArmAsm
#include "system.h"
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#include "em_abs.h"
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#define MOVL movl (sp)+,(ap)+
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#define MOVQ movq (sp)+,(ap)+
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# $Header$
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.set sigvec,108
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.globl .mon
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.mon:
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movl (sp)+,r2 # return address in r2
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movl (sp)+,r0 # monitor call in r0
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movl ap,r3
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movl $args,ap
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cvtlw r0,(ap)+
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cmpl r0,$61
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jgtru Lbadmon
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ashl $2,r0,r0
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jmp *L0(r0)
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.data
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.align 2
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L0:
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#ifndef BSD41a
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.long Lbadmon, Lexit, Lfork, Lread, Lwrite
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.long Lopen, Lclose, Lwait, Lcreat, Llink
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.long Lunlink, Lbadmon, Lchdir, Lbadmon, Lbadmon
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.long Lchmod, Lchown, Lbadmon, Lstat, Llseek
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.long Lgetpid, Lbadmon, Lbadmon, Lbadmon, Lgetuid
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.long Lbadmon, Lptrace, Lalarm, Lfstat, Lpause
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.long Lutime, Lbadmon, Lbadmon, Laccess, Lnice
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.long Lbadmon, Lsync, Lkill, Lbadmon, Lbadmon
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.long Lbadmon, Ldup, Lpipe, Lbadmon, Lprofil
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.long Lbadmon, Lbadmon, Lgetgid, Lsigtrp, Lbadmon
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.long Lbadmon, Lacct, Lbadmon, Lbadmon, Lioctl
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.long Lbadmon, Lbadmon, Lbadmon, Lbadmon, Lexece
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.long Lumask, Lchroot
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#else
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.long Lbadmon, Lexit, Lfork, Lread, Lwrite
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.long Lopen, Lclose, Lwait, Lcreat, Llink
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.long Lunlink, Lbadmon, Lchdir, Lbadmon, Lmknod
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.long Lchmod, Lchown, Lbadmon, Lstat, Llseek
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.long Lgetpid, Lmount, Lumount, Lsetuid, Lgetuid
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.long Lstime, Lptrace, Lalarm, Lfstat, Lpause
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.long Lutime, Lbadmon, Lbadmon, Laccess, Lnice
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.long Lftime, Lsync, Lkill, Lbadmon, Lbadmon
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.long Lbadmon, Ldup, Lpipe, Ltimes, Lprofil
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.long Lbadmon, Lsetgid, Lgetgid, Lsigtrp, Lbadmon
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.long Lbadmon, Lacct, Lbadmon, Llock, Lioctl
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.long Lbadmon, Lmpxall, Lbadmon, Lbadmon, Lexece
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.long Lumask, Lchroot
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#endif
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.text
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# Each system call first stores its number of arguments, then the
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# arguments themselves.
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# The system calls are grouped according to their number of arguments
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# and their results.
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# Le*: an errornumber is expected
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# L*r0*: the value of r0 is expected
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# L*r1*: the value of r1 is expected
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# Lnores: no results expected
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# 0 arguments.
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Lsync:
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Lpause:
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clrl (ap)+
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Lnores:
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jsb Lsyscall
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movl r3,ap
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jmp (r2)
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Lgetpid:
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clrl (ap)+
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Lr0:
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jsb Lsyscall
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pushl r0
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movl r3,ap
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jmp (r2)
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Lgetuid:
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Lgetgid:
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clrl (ap)+
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Lr0r1:
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jsb Lsyscall
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pushl r0
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pushl r1
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movl r3,ap
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jmp (r2)
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Lpipe:
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Lwait:
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Lfork:
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clrl (ap)+
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Ler0r1:
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jsb Lsyscall
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pushl r0
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pushl r1
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clrl -(sp)
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movl r3,ap
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jmp (r2)
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# 1 argument.
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Lexit:
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Ltimes:
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cvtbl $1,(ap)+
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MOVL
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jbr Lnores
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Lclose:
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Lunlink:
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Lchdir:
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Lumount:
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Lsetuid:
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Lstime:
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Lnice:
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Lftime:
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Lsetgid:
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Lacct:
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Llock:
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Lchroot:
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cvtbl $1,(ap)+
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MOVL
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Le:
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jsb Lsyscall
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clrl -(sp)
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movl r3,ap
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jmp (r2)
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Lalarm:
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Lumask:
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cvtbl $1,(ap)+
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MOVL
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jbr Lr0
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# 2 arguments.
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Llink:
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Lchmod:
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Lstat:
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Lfstat:
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Lutime:
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Laccess:
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Lkill:
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Lmpxall:
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cvtbl $2,(ap)+
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MOVQ
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jbr Le
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Ldup:
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cvtbl $2,(ap)+
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MOVQ
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Ler0:
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jsb Lsyscall
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pushl r0
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clrl -(sp)
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movl r3,ap
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jmp (r2)
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# 3 arguments.
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Lioctl:
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Lexece:
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Lmknod:
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Lchown:
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Lmount:
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cvtbl $3,(ap)+
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MOVL
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MOVQ
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jbr Le
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Llseek:
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Lread:
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Lwrite:
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cvtbl $3,(ap)+
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MOVL
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MOVQ
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jbr Ler0
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# 4 arguments.
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Lprofil:
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cvtbl $4,(ap)+
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MOVQ
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MOVQ
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jbr Lnores
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Lptrace:
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cvtbl $4,(ap)+
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MOVQ
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MOVQ
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jbr Ler0
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Lopen:
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#ifndef BSD41a
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# The old open(name, mode) system call is simulated by
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# open(name, mode, 0).
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cvtbl $3,(ap)+
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#else
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cvtbl $2,(ap)+
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#endif
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MOVQ
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#ifndef BSD41a
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clrl (ap)+
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#endif
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jbr Ler0
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Lcreat:
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#ifndef BSD41a
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# The old creat(name, mode) system call is simulated by
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# open(name, O_WRONLY | O_CREAT | O_TRUNC, mode).
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cvtbl $5,-2(ap)
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cvtbl $3,(ap)+
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#else
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cvtbl $2,(ap)+
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#endif
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MOVL
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#ifndef BSD41a
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movl $0x601,(ap)+
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#endif
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MOVL
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jbr Ler0
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Lsyscall:
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movl $args,ap
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chmk (ap)+
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bcc L1
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cvtwl r0,(sp) # Push the error returned twice,
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cvtwl r0,-(sp) # overwrite the return address
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movl r3,ap
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jmp (r2)
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L1:
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rsb
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Lbadmon:
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pushl $EBADMON
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jmp .fat
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Lsigtrp:
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movl 4(sp),r1 # Sig in r1
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movl (sp)+,(sp) # Trapno on top of stack
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cmpl r1,$16
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jgtru badsig
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tstl r1
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jeql badsig
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#ifdef BSD42
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movl $3,(ap)+ # sigvec(sig, vec, ovec)
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#else BSD42
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movl $2,(ap)+ # signal(sig, func)
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#endif BSD42
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movl r1,(ap)+
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movl sigadr0 [r1],r0
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tstl (sp)
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blss L2
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cmpl (sp),$252
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bgtr badtrp
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movl r0,(ap)+
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brb sys
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L2: cmpl $-3,(sp)
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bneq L3
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movl $1,(ap)+ # SIG_IGN
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brb sys
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L3: cmpl $-2,(sp)
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bneq badtrp
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clrl (ap)+ # SIG_DFL
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sys:
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#ifdef BSD42
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movl -(ap),vec # vec->sv_handler = func
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movl $vec,(ap)+
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movl $ovec,(ap)+ # Not used.
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#endif BSD42
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pushl sigtrp0 [r1]
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movl 4(sp),sigtrp0 [r1]
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movl (sp)+,(sp) # Old trap number on top of stack.
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movl $args,ap
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#ifdef BSD42
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movw $sigvec,(ap)
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#endif
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chmk (ap)+
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bcc L4
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movl (sp),sigtrp0 [r1] # Error, reset old trap number.
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pushl r0
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movl r3,ap
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jmp (r2)
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L4: clrl -(sp)
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movl r3,ap
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jmp (r2)
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badsig:
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movl $-1,(sp)
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pushl (sp)
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movl r3,ap
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jmp (r2)
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badtrp:
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movl sigtrp0 [r1],(sp)
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pushl $-1
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movl r3,ap
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jmp (r2)
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sigs:
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.word 0x0000
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# Routine to catch signals.
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pushl fp
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movl 12(fp),fp
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movl 12(fp),fp # Restore local base, two levels!
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movl 4(ap),ap
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pushl sigtrp0 [ap]
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jsb .trp
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movl (sp)+,fp
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ret
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.data
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#ifdef BSD42
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vec:
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.long 0 # sv_handler
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.long 0 # sv_mask
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.long 0 # sv_onstack
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ovec:
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.long 0 # sv_onstack
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.long 0 # sv_mask
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.long 0 # sv_onstack
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#endif BSD42
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args:
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.word 0
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.long 0
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.long 0
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.long 0
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.long 0
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.long 0
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.long 0
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sigadr0:
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.long 0 #0
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.long sigs #1
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.long sigs #2
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.long sigs #3
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.long sigs #4
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.long sigs #5
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.long sigs #6
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.long sigs #7
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.long sigs #8
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.long sigs #9
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.long sigs #10
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.long sigs #11
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.long sigs #12
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.long sigs #13
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.long sigs #14
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.long sigs #15
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.long sigs #16
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sigtrp0:
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.long -2
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.long -2
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.long -2
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.long -2
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.long -2
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.long -2
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.long -2
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.long -2
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.long -2
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.long -2
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.long -2
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.long -2
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.long -2
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.long -2
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.long -2
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.long -2
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.long -2
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