PIE binaries fail to execute on Ubuntu #40
Description
I'm working on getting Nix to work with the DC ROMA II. The problem I ran into is a bunch of our bootstrap-tools binaries tries to mmap address 0xf000. This causes the binaries to outright not work.
Program Headers:
Type Offset VirtAddr PhysAddr
FileSiz MemSiz Flags Align
PHDR 0x0000000000000040 0x000000000000f040 0x000000000000f040
0x00000000000002a0 0x00000000000002a0 R 0x8
RISCV_ATTRIBUT 0x0000000000219e92 0x0000000000000000 0x0000000000000000
0x0000000000000057 0x0000000000000000 R 0x1
GNU_STACK 0x0000000000001000 0x0000000000000000 0x0000000000000000
0x0000000000000000 0x0000000000000000 RW 0x10
LOAD 0x0000000000000000 0x000000000000f000 0x000000000000f000
0x0000000000001000 0x0000000000001000 RW 0x1000
LOAD 0x0000000000001000 0x0000000000010000 0x0000000000010000
0x000000000020ded0 0x000000000020ded0 R E 0x1000
INTERP 0x00000000000142d0 0x00000000000232d0 0x00000000000232d0
0x000000000000005c 0x000000000000005c R 0x1
[Requesting program interpreter: /nix/store/kg61gdq4svvph0c4pcsf867r8nkbiqs7-bootstrap-tools/lib/ld-linux-riscv64-lp64d.so.1]
NOTE 0x0000000000014330 0x0000000000023330 0x0000000000023330
0x0000000000000020 0x0000000000000020 R 0x4
GNU_EH_FRAME 0x00000000001c41d8 0x00000000001d31d8 0x00000000001d31d8
0x000000000000967c 0x000000000000967c R 0x4
LOAD 0x000000000020ef58 0x000000000021ef58 0x000000000021ef58
0x000000000000af28 0x00000000000103b8 RW 0x1000
TLS 0x000000000020ef58 0x000000000021ef58 0x000000000021ef58
0x0000000000000000 0x0000000000000010 R 0x8
GNU_RELRO 0x000000000020ef58 0x000000000021ef58 0x000000000021ef58
0x00000000000080a8 0x00000000000080a8 R 0x1
DYNAMIC 0x0000000000216dd0 0x0000000000226dd0 0x0000000000226dd0
0x0000000000000230 0x0000000000000230 RW 0x8
ELF Header:
Magic: 7f 45 4c 46 02 01 01 03 00 00 00 00 00 00 00 00
Class: ELF64
Data: 2's complement, little endian
Version: 1 (current)
OS/ABI: UNIX - GNU
ABI Version: 0
Type: EXEC (Executable file)
Machine: RISC-V
Version: 0x1
Entry point address: 0x2ca98
Start of program headers: 64 (bytes into file)
Start of section headers: 2203656 (bytes into file)
Flags: 0x5, RVC, double-float ABI
Size of this header: 64 (bytes)
Size of program headers: 56 (bytes)
Number of program headers: 12
Size of section headers: 64 (bytes)
Number of section headers: 31
Section header string table index: 30
roma@mu-gundam:~/nixpkgs$ strace -E LD_DEBUG=all /nix/store/kg61gdq4svvph0c4pcsf867r8nkbiqs7-bootstrap-tools/lib/ld-linux-riscv64-lp64d.so.1 /nix/store/kg61gdq4svvph0c4pcsf867rc
execve("/nix/store/kg61gdq4svvph0c4pcsf867r8nkbiqs7-bootstrap-tools/lib/ld-linux-riscv64-lp64d.so.1", ["/nix/store/kg61gdq4svvph0c4pcsf8"..., "/nix/store/kg61gdq4svvph0c4pcsf8"0
brk(NULL) = 0x7fff84224000
openat(AT_FDCWD, "/nix/store/kg61gdq4svvph0c4pcsf867r8nkbiqs7-bootstrap-tools/bin/gcc", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\2\0\363\0\1\0\0\0\230\312\2\0\0\0\0\0"..., 832) = 832
getpid() = 6665
writev(2, [{iov_base=" 6665:\t", iov_len=12}, {iov_base="file=", iov_len=5}, {iov_base="/nix/store/kg61gdq4svvph0c4pcsf8"..., iov_len=67}, {iov_base=" [", iov_len=2}, {iovp
) = 111
mmap(0xf000, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0) = -1 EPERM (Operation not permitted)
close(3) = 0
writev(2, [{iov_base="/nix/store/kg61gdq4svvph0c4pcsf8"..., iov_len=67}, {iov_base=": ", iov_len=2}, {iov_base="error while loading shared libra"..., iov_len=36}, {iov_base=": t
) = 217
exit_group(127) = ?
+++ exited with 127 +++
The default vm.min_mmap_addr is 65536, setting it to 4096 fixes it. Currently looking into a proper fix for the broken PIE binaries.