Public bug reported:
I am on commit 65a3c5984074313602fb5f61cc5f464abfb020c7 (latest as far
as I know). I compiled qemu with --enable-debug.
I'm trying to run a userspace CRIS binary (`./qemu-cris -cpu crisv10
./basic`), but this segfaults. When opening the coredump in gdb, I get
gdb-peda$ bt
#0 0x00007f272a2e1ee1 in __memset_avx2_erms () from /usr/lib/libc.so.6
#1 0x0000564a2f7bcda7 in zero_bss (elf_bss=0x82134, last_bss=0x84000,
prot=0x3) at ../linux-user/elfload.c:1865
#2 0x0000564a2f7bff65 in load_elf_image (
image_name=0x7fffe9f5703d "./basic", image_fd=0x3,
info=0x7fffe9f547c0, pinterp_name=0x7fffe9f545b0,
bprm_buf=0x7fffe9f54920 "\177ELF\001\001\001")
at ../linux-user/elfload.c:2801
#3 0x0000564a2f7c0a12 in load_elf_binary (bprm=0x7fffe9f54920,
info=0x7fffe9f547c0) at ../linux-user/elfload.c:3104
#4 0x0000564a2f81f290 in loader_exec (fdexec=0x3,
filename=0x7fffe9f5703d "./basic", argv=0x564a2f9f3cc0,
envp=0x564a2fa12600, regs=0x7fffe9f54860, infop=0x7fffe9f547c0,
bprm=0x7fffe9f54920) at ../linux-user/linuxload.c:147
#5 0x0000564a2f7c4f9f in main (argc=0x4, argv=0x7fffe9f54e78,
envp=0x7fffe9f54ea0) at ../linux-user/main.c:808
#6 0x00007f272a1a4152 in __libc_start_main () from /usr/lib/libc.so.6
#7 0x0000564a2f786cee in _start ()
Or as a full backtrace:
gdb-peda$ bt full
#0 0x00007f272a2e1ee1 in __memset_avx2_erms () from /usr/lib/libc.so.6
No symbol table info available.
#1 0x0000564a2f7bcda7 in zero_bss (elf_bss=0x82134, last_bss=0x84000,
prot=0x3) at ../linux-user/elfload.c:1865
host_start = 0x92134
host_map_start = 0x93000
host_end = 0x94000
#2 0x0000564a2f7bff65 in load_elf_image (
image_name=0x7fffe9f5703d "./basic", image_fd=0x3,
info=0x7fffe9f547c0, pinterp_name=0x7fffe9f545b0,
bprm_buf=0x7fffe9f54920 "\177ELF\001\001\001")
at ../linux-user/elfload.c:2801
vaddr = 0x82134
vaddr_em = 0x82140
vaddr_len = 0x2000
vaddr_po = 0x134
vaddr_ps = 0x82000
vaddr_ef = 0x82134
elf_prot = 0x3
eppnt = 0x7fffe9f54974
ehdr = 0x7fffe9f54920
phdr = 0x7fffe9f54954
load_addr = 0x80000
load_bias = 0x0
loaddr = 0x80000
hiaddr = 0x1082140
error = 0x80000
i = 0x1
retval = 0x273d2e9c
prot_exec = 0x4
err = 0x0
__func__ = "load_elf_image"
#3 0x0000564a2f7c0a12 in load_elf_binary (bprm=0x7fffe9f54920,
info=0x7fffe9f547c0) at ../linux-user/elfload.c:3104
interp_info = {
load_bias = 0x0,
load_addr = 0x0,
start_code = 0x0,
end_code = 0x0,
start_data = 0x0,
end_data = 0x0,
start_brk = 0x0,
brk = 0x0,
reserve_brk = 0x0,
start_mmap = 0x0,
start_stack = 0x0,
stack_limit = 0x0,
entry = 0x0,
code_offset = 0x0,
data_offset = 0x0,
saved_auxv = 0x0,
auxv_len = 0x0,
arg_start = 0x0,
arg_end = 0x0,
arg_strings = 0x0,
env_strings = 0x0,
file_string = 0x0,
elf_flags = 0x0,
personality = 0x0,
alignment = 0x0,
loadmap_addr = 0x0,
nsegs = 0x0,
loadsegs = 0x0,
pt_dynamic_addr = 0x0,
interpreter_loadmap_addr = 0x0,
interpreter_pt_dynamic_addr = 0x0,
other_info = 0x0,
note_flags = 0x0
}
elf_ex = {
e_ident = "|\214\t1\000\000\000\000\262\002\356_\000\000\000",
e_type = 0x8c7c,
e_machine = 0x3109,
e_version = 0x0,
e_entry = 0x5fee02b2,
e_phoff = 0x0,
e_shoff = 0x31098c7c,
e_flags = 0x0,
e_ehsize = 0x0,
e_phentsize = 0x0,
e_phnum = 0x0,
e_shentsize = 0x0,
e_shnum = 0x0,
e_shstrndx = 0x0
}
elf_interpreter = 0x0
scratch = 0x7f272a358021 <read+97> "H\213D$\bH\203\304(\303\017\037D"
#4 0x0000564a2f81f290 in loader_exec (fdexec=0x3,
filename=0x7fffe9f5703d "./basic", argv=0x564a2f9f3cc0,
envp=0x564a2fa12600, regs=0x7fffe9f54860, infop=0x7fffe9f547c0,
bprm=0x7fffe9f54920) at ../linux-user/linuxload.c:147
retval = 0x400
#5 0x0000564a2f7c4f9f in main (argc=0x4, argv=0x7fffe9f54e78,
envp=0x7fffe9f54ea0) at ../linux-user/main.c:808
regs1 = {
orig_r10 = 0x0,
r0 = 0x0,
r1 = 0x0,
r2 = 0x0,
r3 = 0x0,
r4 = 0x0,
r5 = 0x0,
r6 = 0x0,
r7 = 0x0,
r8 = 0x0,
r9 = 0x0,
r10 = 0x0,
r11 = 0x0,
r12 = 0x0,
r13 = 0x0,
acr = 0x0,
srs = 0x0,
mof = 0x0,
spc = 0x0,
ccs = 0x0,
srp = 0x0,
erp = 0x0,
exs = 0x0,
eda = 0x0
}
regs = 0x7fffe9f54860
info1 = {
load_bias = 0x0,
load_addr = 0x80000,
start_code = 0x80000,
end_code = 0x80133,
start_data = 0xffffffff,
end_data = 0x0,
start_brk = 0x0,
brk = 0x80133,
reserve_brk = 0x1000000,
start_mmap = 0x80000000,
start_stack = 0x0,
stack_limit = 0x0,
entry = 0x80106,
code_offset = 0x0,
data_offset = 0x0,
saved_auxv = 0x0,
auxv_len = 0x0,
arg_start = 0x0,
arg_end = 0x0,
arg_strings = 0x0,
env_strings = 0x0,
file_string = 0x0,
elf_flags = 0x0,
personality = 0x0,
alignment = 0x2000,
loadmap_addr = 0x0,
nsegs = 0x2,
loadsegs = 0x0,
pt_dynamic_addr = 0x0,
interpreter_loadmap_addr = 0x0,
interpreter_pt_dynamic_addr = 0x0,
other_info = 0x0,
note_flags = 0x0
}
info = 0x7fffe9f547c0
bprm = {
buf =
"\177ELF\001\001\001\000\000\000\000\000\000\000\000\000\002\000L\000\001\000\000\000\006\001\b\000\064\000\000\000\264\006\000\000\000\000\000\000\064\000
\000\003\000(\000\016\000\r\000\001\000\000\000\000\000\000\000\000\000\b\000\000\000\b\000\063\001\000\000\063\001\000\000\005\000\000\000\000
\000\000\001\000\000\000\064\001\000\000\064!\b\000\064!\b\000\000\000\000\000\f\000\000\000\006\000\000\000\000
\000\000\004\000\000\000\224\000\000\000\224\000\b\000\224\000\b\000$\000\000\000$\000\000\000\004\000\000\000\004\000\000\000\004\000\000\000\024\000\000\000\003\000\000\000GNU\000PH\017'i\204\231\070e\000\247\376\211\230\236\336Nf7\372\204\342\356\213n\206\214\342\374\201\352\253\370\201\353\273"...,
p = 0x0,
fd = 0x3,
e_uid = 0x3e8,
e_gid = 0x3d9,
argc = 0x1,
envc = 0x43,
argv = 0x564a2f9f3cc0,
envp = 0x564a2fa12600,
filename = 0x7fffe9f5703d "./basic",
core_dump = 0x0
}
ts = 0x564a2fa25400
env = 0x564a2fa24a08
cpu = 0x564a2fa1c730
optind = 0x3
target_environ = 0x564a2fa12600
wrk = 0x7fffe9f550b8
target_argv = 0x564a2f9f3cc0
target_argc = 0x1
i = 0x1
ret = 0x7fff
execfd = 0x3
log_mask = 0x0
max_reserved_va = 0xffffe000
#6 0x00007f272a1a4152 in __libc_start_main () from /usr/lib/libc.so.6
No symbol table info available.
#7 0x0000564a2f786cee in _start ()
No symbol table info available.
The binary itself is just a basic binary that prints "hello\n" to stdout. I
have attached it.
** Affects: qemu
Importance: Undecided
Status: New
** Tags: cris
** Attachment added: "basic"
https://bugs.launchpad.net/bugs/1909770/+attachment/5448329/+files/basic
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https://bugs.launchpad.net/bugs/1909770
Title:
qemu-cris segfaults upon loading userspace binary
Status in QEMU:
New
Bug description:
I am on commit 65a3c5984074313602fb5f61cc5f464abfb020c7 (latest as far
as I know). I compiled qemu with --enable-debug.
I'm trying to run a userspace CRIS binary (`./qemu-cris -cpu crisv10
./basic`), but this segfaults. When opening the coredump in gdb, I get
gdb-peda$ bt
#0 0x00007f272a2e1ee1 in __memset_avx2_erms () from /usr/lib/libc.so.6
#1 0x0000564a2f7bcda7 in zero_bss (elf_bss=0x82134, last_bss=0x84000,
prot=0x3) at ../linux-user/elfload.c:1865
#2 0x0000564a2f7bff65 in load_elf_image (
image_name=0x7fffe9f5703d "./basic", image_fd=0x3,
info=0x7fffe9f547c0, pinterp_name=0x7fffe9f545b0,
bprm_buf=0x7fffe9f54920 "\177ELF\001\001\001")
at ../linux-user/elfload.c:2801
#3 0x0000564a2f7c0a12 in load_elf_binary (bprm=0x7fffe9f54920,
info=0x7fffe9f547c0) at ../linux-user/elfload.c:3104
#4 0x0000564a2f81f290 in loader_exec (fdexec=0x3,
filename=0x7fffe9f5703d "./basic", argv=0x564a2f9f3cc0,
envp=0x564a2fa12600, regs=0x7fffe9f54860, infop=0x7fffe9f547c0,
bprm=0x7fffe9f54920) at ../linux-user/linuxload.c:147
#5 0x0000564a2f7c4f9f in main (argc=0x4, argv=0x7fffe9f54e78,
envp=0x7fffe9f54ea0) at ../linux-user/main.c:808
#6 0x00007f272a1a4152 in __libc_start_main () from /usr/lib/libc.so.6
#7 0x0000564a2f786cee in _start ()
Or as a full backtrace:
gdb-peda$ bt full
#0 0x00007f272a2e1ee1 in __memset_avx2_erms () from /usr/lib/libc.so.6
No symbol table info available.
#1 0x0000564a2f7bcda7 in zero_bss (elf_bss=0x82134, last_bss=0x84000,
prot=0x3) at ../linux-user/elfload.c:1865
host_start = 0x92134
host_map_start = 0x93000
host_end = 0x94000
#2 0x0000564a2f7bff65 in load_elf_image (
image_name=0x7fffe9f5703d "./basic", image_fd=0x3,
info=0x7fffe9f547c0, pinterp_name=0x7fffe9f545b0,
bprm_buf=0x7fffe9f54920 "\177ELF\001\001\001")
at ../linux-user/elfload.c:2801
vaddr = 0x82134
vaddr_em = 0x82140
vaddr_len = 0x2000
vaddr_po = 0x134
vaddr_ps = 0x82000
vaddr_ef = 0x82134
elf_prot = 0x3
eppnt = 0x7fffe9f54974
ehdr = 0x7fffe9f54920
phdr = 0x7fffe9f54954
load_addr = 0x80000
load_bias = 0x0
loaddr = 0x80000
hiaddr = 0x1082140
error = 0x80000
i = 0x1
retval = 0x273d2e9c
prot_exec = 0x4
err = 0x0
__func__ = "load_elf_image"
#3 0x0000564a2f7c0a12 in load_elf_binary (bprm=0x7fffe9f54920,
info=0x7fffe9f547c0) at ../linux-user/elfload.c:3104
interp_info = {
load_bias = 0x0,
load_addr = 0x0,
start_code = 0x0,
end_code = 0x0,
start_data = 0x0,
end_data = 0x0,
start_brk = 0x0,
brk = 0x0,
reserve_brk = 0x0,
start_mmap = 0x0,
start_stack = 0x0,
stack_limit = 0x0,
entry = 0x0,
code_offset = 0x0,
data_offset = 0x0,
saved_auxv = 0x0,
auxv_len = 0x0,
arg_start = 0x0,
arg_end = 0x0,
arg_strings = 0x0,
env_strings = 0x0,
file_string = 0x0,
elf_flags = 0x0,
personality = 0x0,
alignment = 0x0,
loadmap_addr = 0x0,
nsegs = 0x0,
loadsegs = 0x0,
pt_dynamic_addr = 0x0,
interpreter_loadmap_addr = 0x0,
interpreter_pt_dynamic_addr = 0x0,
other_info = 0x0,
note_flags = 0x0
}
elf_ex = {
e_ident = "|\214\t1\000\000\000\000\262\002\356_\000\000\000",
e_type = 0x8c7c,
e_machine = 0x3109,
e_version = 0x0,
e_entry = 0x5fee02b2,
e_phoff = 0x0,
e_shoff = 0x31098c7c,
e_flags = 0x0,
e_ehsize = 0x0,
e_phentsize = 0x0,
e_phnum = 0x0,
e_shentsize = 0x0,
e_shnum = 0x0,
e_shstrndx = 0x0
}
elf_interpreter = 0x0
scratch = 0x7f272a358021 <read+97> "H\213D$\bH\203\304(\303\017\037D"
#4 0x0000564a2f81f290 in loader_exec (fdexec=0x3,
filename=0x7fffe9f5703d "./basic", argv=0x564a2f9f3cc0,
envp=0x564a2fa12600, regs=0x7fffe9f54860, infop=0x7fffe9f547c0,
bprm=0x7fffe9f54920) at ../linux-user/linuxload.c:147
retval = 0x400
#5 0x0000564a2f7c4f9f in main (argc=0x4, argv=0x7fffe9f54e78,
envp=0x7fffe9f54ea0) at ../linux-user/main.c:808
regs1 = {
orig_r10 = 0x0,
r0 = 0x0,
r1 = 0x0,
r2 = 0x0,
r3 = 0x0,
r4 = 0x0,
r5 = 0x0,
r6 = 0x0,
r7 = 0x0,
r8 = 0x0,
r9 = 0x0,
r10 = 0x0,
r11 = 0x0,
r12 = 0x0,
r13 = 0x0,
acr = 0x0,
srs = 0x0,
mof = 0x0,
spc = 0x0,
ccs = 0x0,
srp = 0x0,
erp = 0x0,
exs = 0x0,
eda = 0x0
}
regs = 0x7fffe9f54860
info1 = {
load_bias = 0x0,
load_addr = 0x80000,
start_code = 0x80000,
end_code = 0x80133,
start_data = 0xffffffff,
end_data = 0x0,
start_brk = 0x0,
brk = 0x80133,
reserve_brk = 0x1000000,
start_mmap = 0x80000000,
start_stack = 0x0,
stack_limit = 0x0,
entry = 0x80106,
code_offset = 0x0,
data_offset = 0x0,
saved_auxv = 0x0,
auxv_len = 0x0,
arg_start = 0x0,
arg_end = 0x0,
arg_strings = 0x0,
env_strings = 0x0,
file_string = 0x0,
elf_flags = 0x0,
personality = 0x0,
alignment = 0x2000,
loadmap_addr = 0x0,
nsegs = 0x2,
loadsegs = 0x0,
pt_dynamic_addr = 0x0,
interpreter_loadmap_addr = 0x0,
interpreter_pt_dynamic_addr = 0x0,
other_info = 0x0,
note_flags = 0x0
}
info = 0x7fffe9f547c0
bprm = {
buf =
"\177ELF\001\001\001\000\000\000\000\000\000\000\000\000\002\000L\000\001\000\000\000\006\001\b\000\064\000\000\000\264\006\000\000\000\000\000\000\064\000
\000\003\000(\000\016\000\r\000\001\000\000\000\000\000\000\000\000\000\b\000\000\000\b\000\063\001\000\000\063\001\000\000\005\000\000\000\000
\000\000\001\000\000\000\064\001\000\000\064!\b\000\064!\b\000\000\000\000\000\f\000\000\000\006\000\000\000\000
\000\000\004\000\000\000\224\000\000\000\224\000\b\000\224\000\b\000$\000\000\000$\000\000\000\004\000\000\000\004\000\000\000\004\000\000\000\024\000\000\000\003\000\000\000GNU\000PH\017'i\204\231\070e\000\247\376\211\230\236\336Nf7\372\204\342\356\213n\206\214\342\374\201\352\253\370\201\353\273"...,
p = 0x0,
fd = 0x3,
e_uid = 0x3e8,
e_gid = 0x3d9,
argc = 0x1,
envc = 0x43,
argv = 0x564a2f9f3cc0,
envp = 0x564a2fa12600,
filename = 0x7fffe9f5703d "./basic",
core_dump = 0x0
}
ts = 0x564a2fa25400
env = 0x564a2fa24a08
cpu = 0x564a2fa1c730
optind = 0x3
target_environ = 0x564a2fa12600
wrk = 0x7fffe9f550b8
target_argv = 0x564a2f9f3cc0
target_argc = 0x1
i = 0x1
ret = 0x7fff
execfd = 0x3
log_mask = 0x0
max_reserved_va = 0xffffe000
#6 0x00007f272a1a4152 in __libc_start_main () from /usr/lib/libc.so.6
No symbol table info available.
#7 0x0000564a2f786cee in _start ()
No symbol table info available.
The binary itself is just a basic binary that prints "hello\n" to stdout. I
have attached it.
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