x86 - missing strings in decompilation

[enovella]

cat hello.c

#include <unistd.h>
#include <stdio.h>

void  main() {
	unsigned int t = 1;

	while (1) {
		printf("Hi r2con: %d\n", 2019);
		sleep(t);
	}
}

Decompilation

[0x00001130]> pdg

void main(void)

{
    int32_t var_14h;
    int32_t var_10h;
    int32_t var_ch;
    int32_t s;
    
    do {
        sym.imp.printf(0x2000, 0x7e3);
        sym.imp.sleep(1);
    } while( true );
}

Sample

hello_avd_x86.zip

[trufae]

[trufae]

I tried to make r2ghidra collect those low addresses but seems to be filtered somewhere maybe inside ghidra's code, but ill investigate further, for now you can use a high basae address, to ensure those dont overlap with the physical address of the binary

[trufae]

Needs r2ghidra.roprop to be disabled to work, but still it needs to be loaded with a high load address

[enovella]

Cannot get it to work over here: (with out-the-box flags)

[0x00001060]> s main
[0x00001130]> pdg

void main(void)

{
    uint var_14h;
    uint var_10h;
    uint var_ch;
    uint s;

    do {
        sym.imp.printf(0xffffdfff, 0x7e3);
        sym.imp.sleep(0xffffffff);
    } while( true );
}
[0x00001130]> !r2 -v
radare2 5.7.5 28731 @ darwin-x86-64 git.5.7.4-144-g566227105
commit: 5662271054b5d2eb4f7cad0e26857f381a6959c7 build: 2022-07-31__18:09:25

[GianisTsol]

any updates?

[trufae]

Did you tried setting different values for the roprop option?