>You'll probably have to create a "static inline" function [...]
In my test, the stack frame setup still was not done with a call to a
static inline function. However, removing the "static inline"
resulted in the stack frame setup being in the code for the helper
function at the expense of a call from the .init8 function.
void id_filter_init8( void ) __attribute__ ((naked))
__attribute__((section(".init8")));
void id_filter_init8( void )
{
98: 07 d0 rcall .+14 ; 0xa8 <bar>
9a: 03 d0 rcall .+6 ; 0xa2 <main>
9c: 2a c0 rjmp .+84 ; 0xf2 <_exit>
...
void bar(void)
{
a8: df 93 push r29
aa: cf 93 push r28
ac: cd b7 in r28, 0x3d ; 61
ae: de b7 in r29, 0x3e ; 62
b0: c0 58 subi r28, 0x80 ; 128
b2: d0 40 sbci r29, 0x00 ; 0
b4: 0f b6 in r0, 0x3f ; 63
b6: f8 94 cli
b8: de bf out 0x3e, r29 ; 62
ba: 0f be out 0x3f, r0 ; 63
bc: cd bf out 0x3d, r28 ; 61
be: fe 01 movw r30, r28
c0: 31 96 adiw r30, 0x01 ; 1
uint8_t ff_u8[128U];
/* memset() should really be used here */
for( uint16_t idx_u16 = 0U; idx_u16 < (uint16_t) sizeof( ff_u8 ); idx_u16++)
c2: ce 01 movw r24, r28
c4: 8f 57 subi r24, 0x7F ; 127
c6: 9f 4f sbci r25, 0xFF ; 255
{
ff_u8[ idx_u16 ] = 0U;
c8: 11 92 st Z+, r1
void bar(void)
{
uint8_t ff_u8[128U];
/* memset() should really be used here */
for( uint16_t idx_u16 = 0U; idx_u16 < (uint16_t) sizeof( ff_u8 ); idx_u16++)
ca: e8 17 cp r30, r24
cc: f9 07 cpc r31, r25
ce: e1 f7 brne .-8 ; 0xc8 <bar+0x20>
{
ff_u8[ idx_u16 ] = 0U;
}
foo(ff_u8[ val ]); // <-- this is to prevent the code above from
being optimized away
d0: 80 91 00 01 lds r24, 0x0100
d4: fe 01 movw r30, r28
d6: e8 0f add r30, r24
d8: f1 1d adc r31, r1
da: 81 81 ldd r24, Z+1 ; 0x01
dc: e1 df rcall .-62 ; 0xa0 <foo>
}
de: c0 58 subi r28, 0x80 ; 128
e0: df 4f sbci r29, 0xFF ; 255
e2: 0f b6 in r0, 0x3f ; 63
e4: f8 94 cli
e6: de bf out 0x3e, r29 ; 62
e8: 0f be out 0x3f, r0 ; 63
ea: cd bf out 0x3d, r28 ; 61
ec: cf 91 pop r28
ee: df 91 pop r29
f0: 08 95 ret
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