Assembly Language Files

Is there any way to treat .c files as assembly language files?
I have a code generator that creates .c files, so it would be very useful if I could put a directive such as "#asm" at the beginning of the files that contain assembly language only, to force the assembler to be used instead of the C compiler.

For example, a .asm file such as the following would be transformed into a C file:
(.asm file)
;-------------------------------------------------------------------------------
; sys_svc.asm
;
; The interrupt handler for svc (supervisor mode)
    .text
    .arm
;-------------------------------------------------------------------------------
; SVC Interrupt Handler
    .global  _svc
    .asmfunc
_svc:

        stmfd  sp!,  {r0-r12,lr}
        ldmfd  sp!,  {r0-r12,pc}^
    .endasmfunc
;-------------------------------------------------------------------------------

(.c file)

void svc(void)
{
#asm

; The interrupt handler for svc (supervisor mode)
    .text
    .arm
;-------------------------------------------------------------------------------
; SVC Interrupt Handler
    .global  _svc
    .asmfunc
_svc:

        stmfd  sp!,  {r0-r12,lr}
        ldmfd  sp!,  {r0-r12,pc}^
    .endasmfunc

#endasm
}

Regards,
Dave