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Date: Tue, 31 May 2005 03:38:00 -0000
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From: "ulyssesric at yahoo dot com dot tw" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/21834] Error when passing unsigned long long as function arguments
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------- Additional Comments From ulyssesric at yahoo dot com dot tw  2005-05-31 03:35 -------
Fine, I'll list all codes if you insist:

#include <avr/io.h>

typedef unsigned char           byte_t;
typedef unsigned long long      qword_t;

void uart_init(void)
{
    // 115200 & 8N1
    UBRR1H = 0x00;
    UBRR1L = 0x08;
    UCSR1A |= (0x01<<U2X1);
    UCSR1C = 0x06;
    UCSR1B &= ~0x04;
    UCSR1B |= ((0x01<<RXEN1) | (0x01<<TXEN1));
}

void uart_putchar(byte_t octet)
{
    UDR1 = octet;
    while (!(UCSR1A & (0x01<<UDRE1)));
}

void uart_write(byte_t *octet, uint8_t len)
{
    while (len--) {
        UDR1 = *octet++;
        while (!(UCSR1A & (0x01<<UDRE1)));
    }
}

void foo( byte_t state, qword_t srcAddr, byte_t routeOptions, qword_t dstAddr )
{
    uart_putchar(state);
    uart_write((byte_t *)(&srcAddr),8);
    uart_putchar(routeOptions);
    uart_write((byte_t *)(&dstAddr),8);
}

void main(void) {
    uart_init();
    foo(0x00,0x1234ll,0x01, 0x5678ll);
    while(1);
}

and the output is:

D1,
34,12,D1,D1,D1,D1,D1,D1,
01,
AB,CD,00,CF,00,80,00,78

in hexdecimal format. Obviously it's incorrect.

If I change the code to:

#include <avr/io.h>

typedef unsigned char           byte_t;
typedef unsigned long long      qword_t;

void uart_init(void)
{
    // 115200 & 8N1
    UBRR1H = 0x00;
    UBRR1L = 0x08;
    UCSR1A |= (0x01<<U2X1);
    UCSR1C = 0x06;
    UCSR1B &= ~0x04;
    UCSR1B |= ((0x01<<RXEN1) | (0x01<<TXEN1));
}

void uart_putchar(byte_t octet)
{
    UDR1 = octet;
    while (!(UCSR1A & (0x01<<UDRE1)));
}

void uart_write(byte_t *octet, uint8_t len)
{
    while (len--) {
        UDR1 = *octet++;
        while (!(UCSR1A & (0x01<<UDRE1)));
    }
}

void foo( qword_t srcAddr, qword_t dstAddr, byte_t state, byte_t routeOptions )
{
    uart_putchar(state);
    uart_write((byte_t *)(&srcAddr),8);
    uart_putchar(routeOptions);
    uart_write((byte_t *)(&dstAddr),8);
}

void main(void) {
    uart_init();
    foo(0x1234ll,0x5678ll,0x00,0x01);
    while(1);
}

And the output will be:

00,
34,12,00,00,00,00,00,00,
01,
78,56,00,00,00,00,00,00

Compiling Procedure:

avr-gcc -mmcu=atmega128 -g -Os -Wall -Wa,-adhlns=main.lst -std=gnu99 -funsigned-char 
-funsigned-bitfields -fpack-struct -fshort-enums -ffreestanding -Wl,-Map=main.map -Wl,--cref  
main.c -o main.elf
avr-objcopy -O ihex -R .eeprom test.elf test.hex
avr-objcopy -j .eeprom --set-section-flags=.eeprom="alloc,load" --change-section-lma .eeprom=0 
-O ihex test.elf test.eep
avr-objdump -h -S test.elf > test.lss
avr-nm -n test.elf > test.sym

Programming with AVR Studio 4.11 build 401, JTAGICE mkII


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21834