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185 lines
3.7 KiB
ArmAsm
185 lines
3.7 KiB
ArmAsm
#include <machine/asm.h>
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#define COMPAT_43
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#include <sys/syscall.h>
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#ifndef __CONCAT
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#include <sys/cdefs.h>
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#endif
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#define CONCAT __CONCAT
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#undef SYSCALL
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/* Kernel syscall interface:
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Input:
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0 - system call number
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3-8 - arguments, as in C
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Output:
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so - (summary overflow) clear iff successful
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This macro is similar to SYSCALL in asm.h, but not completely.
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There's room for optimization, if we assume this will continue to
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be assembled as one file.
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This macro expansions does not include the return instruction.
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If there's no other work to be done, use something like:
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SYSCALL(foo) ; ret
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If there is other work to do (in fork, maybe?), do it after the
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SYSCALL invocation. */
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ENTRY(machdep_cerror)
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mflr 0 # Save LR in 0
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stwu 1,-16(1) # allocate new stack frame
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stw 0,20(1) # Stash 0 in stack
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stw 31,8(1) # Stash 31 in stack (since it's callee-saved
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mr 31,3 # and we stash return there)
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bl PIC_PLT(_C_LABEL(__errno))
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stw 31,0(3) # *errno() = err
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lwz 0,20(1) # Restore LR from stack to 0
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neg 3,31 # return -errno to 3
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lwz 31,8(1) # Restore 31 from stack
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mtlr 0
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la 1,16(1) # Restore stack frame
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li 4,-1 # Put -1 in r4 for those syscalls that return
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blr # two values
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/* The fork system call is special... */
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ENTRY(machdep_sys_fork)
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li 0, SYS_fork
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sc
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bso PIC_PLT(_C_LABEL(machdep_cerror))
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addi 4,4,-1
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blr
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/* The pipe system call is special... */
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ENTRY(machdep_sys_pipe)
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mr 5,3
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li 0,SYS_pipe
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sc
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bso PIC_PLT(_C_LABEL(machdep_cerror))
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stw 3,0(5) # Success, store fds
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stw 4,4(5)
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li 3,0
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blr # And return 0
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#ifndef SYS___sigsuspend14
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/* The sigsuspend system call is special... */
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ENTRY(machdep_sys_sigsuspend)
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lwz 3,0(3)
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li 0,SYS_compat_13_sigsuspend13
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sc
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b PIC_PLT(_C_LABEL(machdep_cerror))
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#endif /* SYS_sigsuspend14 */
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#ifndef SYS___sigprocmask14
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/* The sigprocmask system call is special... */
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ENTRY(machdep_sys_sigprocmask)
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or. 4,4,4 # Set == NULL ?
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li 6,1 # how = SIG_BLOCK
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beq Ldoit
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lwz 4,0(4) # if not, replace it in r4 with #set
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mr 6,3
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Ldoit: mr 3,6 # ... using sigprocmask(SIG_BLOCK)
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li 0,SYS_compat_13_sigprocmask13
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sc
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bso PIC_PLT(_C_LABEL(machdep_cerror))
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or. 5,5,5 # Check to see if oset requested
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beq Ldone # if oset != NULL
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stw 3,0(5) # *oset = oldmask
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Ldone:
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li 3,0 # return 0
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blr
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#endif /* SYS_sigprocmask14 */
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/* More stuff ... */
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/* For fstat() we actually syscall fstat13. */
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ENTRY(machdep_sys_fstat)
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li 0, SYS___fstat13
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sc
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bnslr
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b PIC_PLT(_C_LABEL(machdep_cerror))
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/* Do we need to save the entire floating point state? I think so... */
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ENTRY(__machdep_save_fp_state)
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stwu 1,-8(1)
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stw 3,4(1)
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stfd 0,0(3)
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stfdu 1,8(3)
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stfdu 2,8(3)
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stfdu 3,8(3)
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stfdu 4,8(3)
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stfdu 5,8(3)
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stfdu 6,8(3)
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stfdu 7,8(3)
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stfdu 8,8(3)
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stfdu 9,8(3)
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stfdu 10,8(3)
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stfdu 11,8(3)
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stfdu 12,8(3)
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stfdu 13,8(3)
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stfdu 14,8(3)
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stfdu 15,8(3)
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stfdu 16,8(3)
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stfdu 17,8(3)
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stfdu 18,8(3)
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stfdu 19,8(3)
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stfdu 20,8(3)
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stfdu 21,8(3)
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stfdu 22,8(3)
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stfdu 23,8(3)
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stfdu 24,8(3)
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stfdu 25,8(3)
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stfdu 26,8(3)
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stfdu 27,8(3)
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stfdu 28,8(3)
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stfdu 29,8(3)
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stfdu 30,8(3)
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stfdu 31,8(3)
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mffs 0
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stfdu 0,8(3)
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lwz 3,4(1)
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lwz 1,0(1)
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blr
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ENTRY(__machdep_restore_fp_state)
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stwu 1,-12(1)
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stw 3,4(1)
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stw 4,8(1)
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mr 4,3
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lfdu 1,8(3)
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lfdu 2,8(3)
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lfdu 3,8(3)
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lfdu 4,8(3)
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lfdu 5,8(3)
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lfdu 6,8(3)
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lfdu 7,8(3)
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lfdu 8,8(3)
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lfdu 9,8(3)
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lfdu 10,8(3)
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lfdu 11,8(3)
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lfdu 12,8(3)
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lfdu 13,8(3)
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lfdu 14,8(3)
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lfdu 15,8(3)
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lfdu 16,8(3)
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lfdu 17,8(3)
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lfdu 18,8(3)
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lfdu 19,8(3)
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lfdu 20,8(3)
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lfdu 21,8(3)
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lfdu 22,8(3)
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lfdu 23,8(3)
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lfdu 24,8(3)
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lfdu 25,8(3)
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lfdu 26,8(3)
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lfdu 27,8(3)
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lfdu 28,8(3)
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lfdu 29,8(3)
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lfdu 30,8(3)
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lfdu 31,8(3)
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lfdu 0,8(3)
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mtfsf 127,0
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lfd 0,0(4)
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lwz 3,4(1)
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lwz 4,8(1)
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lwz 1,0(1)
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blr
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