Re: [Help!] Use two different assembly symbol in D, but they are same address.
On Sunday, 25 August 2019 at 13:43:42 UTC, a11e99z wrote: On Sunday, 25 August 2019 at 13:24:57 UTC, lili wrote: On Saturday, 24 August 2019 at 12:55:57 UTC, a11e99z wrote: and try to use any compiler DMD/LDC/GDC. maybe result will be that u want.
Re: [Help!] Use two different assembly symbol in D, but they are same address.
On Sunday, 25 August 2019 at 13:24:57 UTC, lili wrote: On Saturday, 24 August 2019 at 12:55:57 UTC, a11e99z wrote: On Saturday, 24 August 2019 at 12:16:34 UTC, lili wrote: On Saturday, 24 August 2019 at 12:09:19 UTC, a11e99z wrote: On Saturday, 24 August 2019 at 11:53:01 UTC, lili wrote: [...] resb 8 just reserving 8 bytes not initializing it. probably u compare some garbage. sometimes it equals, sometimes not. no? I write wrong, not if (_vga_x == _vga_y) but if (&_vga_x == &_vga_y) try to do next: add funtion in asm that returns real addresses to vga_x,y extern(C) void asmVgas( int** px, int** py) call it int *px, *py; asmVgas( , ); writefln( "%s=%s,%s=%s",px, &_vga_x,py, &_vga_y); and see result I followed your suggest, call asm_fn in d function. it return address not 0 but is a correct address same as the var address show in link map file. when a try define a __shared int xx, the also 0. after linked all variables address is 0 that in .bss segment. do you know why occur this? [global asm_fn] asm_fn: mov rax, p2_table ret no idea. u can to define _vga_x,_vga_y in D code and export it to asm (vice versa than now). see result again. in case still not working: make very simple app with global vars: 2 D-files OR 1 D-file and 1 asm-file (maybe its not working even for D+D files). try to get same bug from compiler/linker. fill the issue and attach both files as sample. add point (for case D+asm) "how to compile asm file for linking with D" as u did. then wait and hope.
Re: [Help!] Use two different assembly symbol in D, but they are same address.
On Saturday, 24 August 2019 at 12:55:57 UTC, a11e99z wrote: On Saturday, 24 August 2019 at 12:16:34 UTC, lili wrote: On Saturday, 24 August 2019 at 12:09:19 UTC, a11e99z wrote: On Saturday, 24 August 2019 at 11:53:01 UTC, lili wrote: [...] resb 8 just reserving 8 bytes not initializing it. probably u compare some garbage. sometimes it equals, sometimes not. no? I write wrong, not if (_vga_x == _vga_y) but if (&_vga_x == &_vga_y) try to do next: add funtion in asm that returns real addresses to vga_x,y extern(C) void asmVgas( int** px, int** py) call it int *px, *py; asmVgas( , ); writefln( "%s=%s,%s=%s",px, &_vga_x,py, &_vga_y); and see result I followed your suggest, call asm_fn in d function. it return address not 0 but is a correct address same as the var address show in link map file. when a try define a __shared int xx, the also 0. after linked all variables address is 0 that in .bss segment. do you know why occur this? [global asm_fn] asm_fn: mov rax, p2_table ret
Re: [Help!] Use two different assembly symbol in D, but they are same address.
On Saturday, 24 August 2019 at 12:16:34 UTC, lili wrote: On Saturday, 24 August 2019 at 12:09:19 UTC, a11e99z wrote: On Saturday, 24 August 2019 at 11:53:01 UTC, lili wrote: [...] resb 8 just reserving 8 bytes not initializing it. probably u compare some garbage. sometimes it equals, sometimes not. no? I write wrong, not if (_vga_x == _vga_y) but if (&_vga_x == &_vga_y) try to do next: add funtion in asm that returns real addresses to vga_x,y extern(C) void asmVgas( int** px, int** py) call it int *px, *py; asmVgas( , ); writefln( "%s=%s,%s=%s",px, &_vga_x,py, &_vga_y); and see result
Re: [Help!] Use two different assembly symbol in D, but they are same address.
On Saturday, 24 August 2019 at 12:09:19 UTC, a11e99z wrote: On Saturday, 24 August 2019 at 11:53:01 UTC, lili wrote: [...] resb 8 just reserving 8 bytes not initializing it. probably u compare some garbage. sometimes it equals, sometimes not. no? I write wrong, not if (_vga_x == _vga_y) but if (&_vga_x == &_vga_y)
Re: [Help!] Use two different assembly symbol in D, but they are same address.
On Saturday, 24 August 2019 at 11:53:01 UTC, lili wrote:
Hi:
definition _vga_x and _vga_y symbol in asm, compile use nasm
-f elf64 -o boot.o boot.asm
[section .bss]
...
[global _vga_x]
_vga_x:
resb 8
[global _vga_y]
_vga_y:
resb 8
and nm boot.o show below
...
00107000 B _vga_x
00107008 B _vga_y
and In another D file use this two symbol
extern(C) {
extern __gshared int _vga_x; //definition in boot.asm
extern __gshared int _vga_y; //definition in boot.asm
}
void tt()
{
if (_vga_x == _vga_y)
//where is true, why?
}
but when a run tt so strange things happend that the test is
true.
Is where has a coding mistake.
src https://github.com/lilijreey/OS-D
resb 8
just reserving 8 bytes not initializing it.
probably u compare some garbage. sometimes it equals, sometimes
not.
no?
[Help!] Use two different assembly symbol in D, but they are same address.
Hi:
definition _vga_x and _vga_y symbol in asm, compile use nasm -f
elf64 -o boot.o boot.asm
[section .bss]
...
[global _vga_x]
_vga_x:
resb 8
[global _vga_y]
_vga_y:
resb 8
and nm boot.o show below
...
00107000 B _vga_x
00107008 B _vga_y
and In another D file use this two symbol
extern(C) {
extern __gshared int _vga_x; //definition in boot.asm
extern __gshared int _vga_y; //definition in boot.asm
}
void tt()
{
if (_vga_x == _vga_y)
//where is true, why?
}
but when a run tt so strange things happend that the test is
true.
Is where has a coding mistake.
src https://github.com/lilijreey/OS-D
