a0d2fe2548
passed to the execl(), execle(), and execlp() functions are in the form of the argument vector to be passed to execve(). On these architectures, it is unnecessary to count the number of arguments, allocate space on the stack, copy the arguments, etc. The vector already on the stack can be used instead. When some arguments are passed in registers (like most RISC CPU's), it should be possible to allocate stack space adjacent such that the registers can be copied to that memory. After that, the same approach described above can be used. This change takes advantage of this on the i386, m68k, and ns32k. It is probably true on the vax, but I am unable to check. RISC CPU's probably need assembly language implementations to ensure everything is placed exactly as needed when registers are copied to the stack... |
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