Implement System V AMD64 uppercaser for argc/argv #101
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Add Linux x86-64 uppercaser example using System V AMD64 ABI and C library calls. Pass argc/argv via registers (rdi/rsi) instead of accessing them on the stack. Print the effective argument count (excluding argv[0]) using printf with correct varargs setup (xor eax, eax). Iterate over argv[1..argc-1], converting each argument string to uppercase in-place before printing. Preserve and update all existing comments to document both ABI usage and the uppercase transformation.
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Add Linux x86-64 uppercaser example using System V AMD64 ABI and C library calls.
Pass argc/argv via registers (rdi/rsi) instead of accessing them on the stack.
Print the effective argument count (excluding argv[0]) using printf with correct varargs setup (xor eax, eax).
Iterate over argv[1..argc-1], converting each argument string to uppercase in-place before printing.
Preserve and update all existing comments to document both ABI usage and the uppercase transformation.