A C function procprob has four arguments u, a, v, and b. Each is either a signed

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A C function procprob has four arguments u, a, v, and b. Each is either a signed number or a pointer to a signed number, where the numbers have different sizes. The function has the following body:

1 2 3 4 *u += a; *v += b; return sizeof (a) + sizeof (b); It compiles to the following x86-64 code:

(a) C code void proc(long int { 1 2 3 4 } (b) Generated assembly code 5 6 7 8 al, long #alp. a2, int *a2p.

5 6 movl ret $6, %eax

Determine a valid ordering and types of the four parameters. There are two correct answers.

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Computer Systems A Programmers Perspective

ISBN: 9781292101767

3rd Global Edition

Authors: Randal E. Bryant, David R. O'Hallaron

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Question Posted: Nov 06, 2023 10:57 AM

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A C function procprob has four arguments u, a, v, and b. Each is either a signed

Question:

1 2 3 4 لا *u += a; *v += b; return sizeof (a)+ sizeof (b); It compiles to the following x86-64 code: procprob: movslq %edi, %rdi addq %rdi, (%rdx) addb %sil, (%rcx)

Step by Step Answer:

This problem is a bit tricky due to the mixing of different data sizes Let us first describe one ans...View the full answer

Computer Systems A Programmers Perspective

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1 2 3 4 لا u += a; v += b; return sizeof (a)+ sizeof (b); It compiles to the following x86-64 code: procprob: movslq %edi, %rdi addq %rdi, (%rdx) addb %sil, (%rcx)