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Fix fizzbuzz base pointer clobber

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dwrz
2026-10-22 14:25:24 +00:00
parent 1735b80e24
commit 163f74bc0c
1 changed files with 4 additions and 4 deletions
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fizzbuzz/fizzbuzz.s
+4 -4
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@@ -34,7 +34,7 @@ _test_fizzbuzz:
push %rbp push %rbp
mov %rsp, %rbp mov %rsp, %rbp
sub $8, %rsp # Local stack variable to track print case. sub $8, %rsp # Local stack variable to track print case.
movq $0, 8(%rsp) movq $0, 0(%rsp)
test_fizz: test_fizz:
# Retrieve the loop counter to use as the dividend. # Retrieve the loop counter to use as the dividend.
# It's now 24 bytes up from the stack pointer: # It's now 24 bytes up from the stack pointer:
@@ -51,7 +51,7 @@ test_fizz:
div %rbx div %rbx
cmp $0, %rdx # Was the remainder 0? cmp $0, %rdx # Was the remainder 0?
jne test_buzz # If not, test division by 5. jne test_buzz # If not, test division by 5.
addq $1, 8(%rsp) # Otherwise, increment the print case. addq $1, 0(%rsp) # Otherwise, increment the print case.
test_buzz: test_buzz:
mov 24(%rsp), %rax # Retrieve the counter again. mov 24(%rsp), %rax # Retrieve the counter again.
movq $5, %rbx # Use 5 as the divisor for "buzz" test. movq $5, %rbx # Use 5 as the divisor for "buzz" test.
@@ -59,9 +59,9 @@ test_buzz:
div %rbx div %rbx
cmp $0, %rdx # Was the remainder 0? cmp $0, %rdx # Was the remainder 0?
jne return_print_case # If not, return. jne return_print_case # If not, return.
addq $2, 8(%rsp) # Otherwise, increment the print case by two. addq $2, 0(%rsp) # Otherwise, increment the print case by two.
return_print_case: return_print_case:
mov 8(%rsp), %rax # Put the print case in %rax. mov 0(%rsp), %rax # Put the print case in %rax.
mov %rbp, %rsp mov %rbp, %rsp
pop %rbp pop %rbp
ret ret