_gpu_dxg_r4g_size.nx source

1// _gpu_dxg_r4g_size.nx -- R4g size-sweep: find the real _IOC_SIZE for CREATESYNCHRONIZATIONOBJECT (nr=0x10). 2// device@0, info.type@8 = 5 (monitored fence). Sweep sizes; non-ENOTTY(-25) = the recognized struct size. 3// On a recognized size, scan for a 0x4000xxxx sync-object handle to locate the OUT offset. raw syscalls only. license_tier: ORIGINAL 4import "nx_syscalls.nx" 5 6const ENUM2_CODE: i64 = 0xC0104714 7const QAI_CODE: i64 = 0xC0184709 8const OAFL_CODE: i64 = 0xC00C4701 9const CDEV_CODE: i64 = 0xC0404702 10 11func p(s: *u8) -> i64 { var nn: i64=0; while s[nn]!=(0 as u8){nn=nn+1} sys_write(1,s,nn); return 0 } 12func n(v: i64) -> i64 { let bb: *u8=sys_mmap(28); var m: i64=v; if m<0{m=0-m;sys_write(1,"-" as *u8,1)}; let t: *u8=sys_mmap(28); var k: i64=0; if m==0{t[0]=48;k=1}; while m>0{t[k]=(48+(m%10)) as u8;m=m/10;k=k+1}; var i: i64=0; while i<k{bb[i]=t[k-1-i];i=i+1}; sys_write(1,bb,k); return 0 } 13func x(v: i64) -> i64 { p("0x" as *u8); let bb:*u8=sys_mmap(20); var k:i64=0; var m:i64=v; if m==0{bb[0]=48;k=1}; while m>0{ let d:i64=m&15; if d<10{bb[k]=(48+d) as u8}else{bb[k]=(87+d) as u8}; m=(m>>4); k=k+1 } var i:i64=0; let o:*u8=sys_mmap(20); while i<k{o[i]=bb[k-1-i];i=i+1} sys_write(1,o,k); return 0 } 14func iowr(nr: i64, size: i64) -> i64 { return (3 << 30) | ((size & 0x3fff) << 16) | (0x47 << 8) | (nr & 0xff) } 15func rd32(buf: *u8, off: i64) -> i64 { return (buf[off] as i64)|((buf[off+1] as i64)<<8)|((buf[off+2] as i64)<<16)|((buf[off+3] as i64)<<24) } 16func setu32(buf: *u8, off: i64, val: i64) -> i64 { let w: *u8 = (buf as i64 + off) as *u8; w[0]=(val&0xff) as u8; w[1]=((val>>8)&0xff) as u8; w[2]=((val>>16)&0xff) as u8; w[3]=((val>>24)&0xff) as u8; return 0 } 17 18func query_type(fd: i64, handle: i64, qtype: i64, psize: i64, outv: *i64) -> i64 { 19 let priv: *u8 = sys_mmap(64); var zz: i64 = 0; while zz < 64 { priv[zz] = 0 as u8; zz = zz + 1 } 20 let req: *u8 = sys_mmap(64); var y: i64 = 0; while y < 64 { req[y] = 0 as u8; y = y + 1 } 21 let h: *i64 = (req as i64 + 0) as *i64; h[0] = (handle & 0xffffffff) | ((qtype & 0xffffffff) << 32) 22 let pd: *i64 = (req as i64 + 8) as *i64; pd[0] = priv as i64 23 let pds: *i64 = (req as i64 + 16) as *i64; pds[0] = psize & 0xffffffff 24 let ret: i64 = sys_ioctl(fd, QAI_CODE, req as i64); outv[0] = rd32(priv, 0); return ret 25} 26func open_from_luid(fd: i64, luid_lo: i64, luid_hi: i64, outh: *i64) -> i64 { 27 let req: *u8 = sys_mmap(64); var y: i64 = 0; while y < 64 { req[y] = 0 as u8; y = y + 1 } 28 let lo: *i64 = (req as i64 + 0) as *i64; lo[0] = (luid_lo & 0xffffffff) | ((luid_hi & 0xffffffff) << 32) 29 let ret: i64 = sys_ioctl(fd, OAFL_CODE, req as i64); outh[0] = rd32(req, 8); return ret 30} 31func create_device(fd: i64, adapter: i64, outd: *i64) -> i64 { 32 let buf: *u8 = sys_mmap(512); var bz: i64 = 0; while bz < 512 { buf[bz] = 0 as u8; bz = bz + 1 } 33 setu32(buf, 0, adapter & 0xffffffff) 34 let ret: i64 = sys_ioctl(fd, CDEV_CODE, buf as i64); outd[0] = rd32(buf, 12); return ret 35} 36 37func main() -> i64 { 38 p("=== R4g SIZE-SWEEP: CREATESYNCHRONIZATIONOBJECT (nr=0x10), type=5 monitored fence ===\n" as *u8) 39 let fd: i64 = sys_openat_rd("/dev/dxg" as *u8) 40 if fd < 0 { p("open fail\n" as *u8); sys_exit(1); return 1 } 41 let ainfo: *u8 = sys_mmap(4096); var z: i64 = 0; while z < 4096 { ainfo[z] = 0 as u8; z = z + 1 } 42 let ereq: *u8 = sys_mmap(64); ereq[0] = 8 as u8; let r8: *i64 = (ereq as i64 + 8) as *i64; r8[0] = ainfo as i64 43 sys_ioctl(fd, ENUM2_CODE, ereq as i64); let nc: i64 = rd32(ereq, 0) 44 let v: *i64 = sys_mmap(16); var disc_lo: i64 = 0; var disc_hi: i64 = 0 45 var ai: i64 = 0 46 while ai < nc { 47 let base: i64 = ai * 20; let eh: i64 = rd32(ainfo, base) 48 let qret: i64 = query_type(fd, eh, 15, 4, v); let t: i64 = v[0] 49 if qret == 0 { if ((t>>4)&1) == 1 { if ((t>>2)&1) == 0 { disc_lo = rd32(ainfo, base+4); disc_hi = rd32(ainfo, base+8) } } } 50 ai = ai + 1 51 } 52 let ah: *i64 = sys_mmap(16); open_from_luid(fd, disc_lo, disc_hi, ah) 53 let dh: *i64 = sys_mmap(16); create_device(fd, ah[0], dh); let device: i64 = dh[0] 54 p(" device=" as *u8); x(device); p("\n" as *u8) 55 56 let sizes: *i64 = sys_mmap(256) 57 sizes[0]=64; sizes[1]=72; sizes[2]=80; sizes[3]=88; sizes[4]=92; sizes[5]=96; sizes[6]=100; sizes[7]=104; sizes[8]=108; sizes[9]=112; sizes[10]=116; sizes[11]=120; sizes[12]=124; sizes[13]=128; sizes[14]=136; sizes[15]=144; sizes[16]=152; sizes[17]=160; sizes[18]=176; sizes[19]=192; sizes[20]=0 58 var si: i64 = 0 59 while sizes[si] != 0 { 60 let sz: i64 = sizes[si] 61 let buf: *u8 = sys_mmap(512); var bz: i64 = 0; while bz < 512 { buf[bz] = 0 as u8; bz = bz + 1 } 62 setu32(buf, 0, device & 0xffffffff); setu32(buf, 8, 5) // device@0, type@8=monitored fence 63 let code: i64 = iowr(0x10, sz) 64 let ret: i64 = sys_ioctl(fd, code, buf as i64) 65 p(" size=" as *u8); n(sz); p(" code=" as *u8); x(code); p(" ret=" as *u8); n(ret) 66 if ret != 0 - 25 { 67 var off: i64 = 4; var fo: i64 = 0 - 1; var fv: i64 = 0 68 while off + 4 <= sz { let w: i64 = rd32(buf, off); if (w & 0xffff0000) == 0x40000000 { if fo < 0 { fo = off; fv = w } } off = off + 4 } 69 p(" <- RECOGNIZED. 0x4000-handle off=" as *u8); n(fo); p(" val=" as *u8); x(fv) 70 } 71 p("\n" as *u8) 72 si = si + 1 73 } 74 sys_close(fd) 75 p("=== R4g SIZE-SWEEP DONE ===\n" as *u8) 76 return 0 77}