On Wed, Jun 29, 2022 at 4:27 PM John Reiser <[email protected]> wrote:
> -----
> (gdb) run args...
> Program received signal SIGILL, Illegal instruction.
> (gdb) x/i $pc ## the faulting instruction
> (gdb) x/12i pc-6*4 ## disassemble the surrounding instructions
> (Gdb) x/12xw $pc-6*4 ## and in 32-bit raw hexadecimal
> (gdb) info reg ## content of all registers
> (gdb) x/16xw $sp ## dump the active end of the stack
> (gdb) bt ## source-level backtrace
> -----
Here is what I get on first try:
Program received signal SIGILL, Illegal instruction.
vgPlain_am_startup (sp_at_startup=3204445696) at
m_aspacemgr/aspacemgr-linux.c:1626
1626 init_nsegment(&seg);
(gdb) x/i $pc
=> 0x58071090 <vgPlain_am_startup+20>: vmov.i32 d16, #0 ; 0x00000000
(gdb) x/12i $pc-6*4
0x58071078 <vgPlain_am_is_valid_for_aspacem_minAddr+236>: eoreq
r6, lr, r4, lsr #6
0x5807107c <vgPlain_am_startup>: push {r4, r5, r6, r7, r8,
r9, r10, r11, lr}
0x58071080 <vgPlain_am_startup+4>: sub sp, sp, #68 ; 0x44
0x58071084 <vgPlain_am_startup+8>: add r8, sp, #8
0x58071088 <vgPlain_am_startup+12>: mov r4, r0
0x5807108c <vgPlain_am_startup+16>: bl 0x5807611c
<vgModuleLocal_am_segnames_init>
=> 0x58071090 <vgPlain_am_startup+20>: vmov.i32 d16, #0 ; 0x00000000
0x58071094 <vgPlain_am_startup+24>: mov lr, r8
0x58071098 <vgPlain_am_startup+28>: mov r3, #0
0x5807109c <vgPlain_am_startup+32>: mov r10, #1
0x580710a0 <vgPlain_am_startup+36>: str r3, [sp, #56] ; 0x38
0x580710a4 <vgPlain_am_startup+40>: mvn r2, #0
(gdb) x/12xw $pc-6*4
0x58071078 <vgPlain_am_is_valid_for_aspacem_minAddr+236>:
0x002e6324 0xe92d4ff0 0xe24dd044 0xe28d8008
0x58071088 <vgPlain_am_startup+12>: 0xe1a04000 0xeb001422
0xf2c00010 0xe1a0e008
0x58071098 <vgPlain_am_startup+28>: 0xe3a03000 0xe3a0a001
0xe58d3038 0xe3e02000
(gdb) info reg
r0 0x4 4
r1 0x0 0
r2 0x5850a0e8 1481679080
r3 0x5850a0f8 1481679096
r4 0xbefff600 3204445696
r5 0x58606388 1482711944
r6 0xbefff600 3204445696
r7 0x58260000 1478885376
r8 0x58708258 1483768408
r9 0x58708354 1483768660
r10 0x0 0
r11 0x587083ac 1483768748
r12 0x5870a3b4 1483776948
sp 0x58708250 0x58708250 <vgPlain_interim_stack+1056416>
lr 0x58071090 1476858000
pc 0x58071090 0x58071090 <vgPlain_am_startup+20>
cpsr 0x80000010 -2147483632
fpscr 0x0 0
(gdb) x/16xw $sp
0x58708250 <vgPlain_interim_stack+1056416>: 0x00000000
0x00000000 0x00000000 0x00000000
0x58708260 <vgPlain_interim_stack+1056432>: 0x00000000
0x00000000 0x00000000 0x00000000
0x58708270 <vgPlain_interim_stack+1056448>: 0x00000000
0x00000000 0x00000000 0x0013296c
0x58708280 <vgPlain_interim_stack+1056464>: 0xbefff604
0xbefff600 0x58260000 0x581fea9c
As a reminder I do not have neon on this machine:
Features : half thumb fastmult vfp edsp thumbee vfpv3 tls idiva
idivt vfpd32 lpae
Also as a reminder, I cannot reproduce the above symptoms on a
different machine (with neon):
Features : half thumb fastmult vfp edsp thumbee neon vfpv3 tls vfpd32
Thanks again for your kind help,
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