Hi,
I am using QEMU from Arch Linux x86_64 official repo. I need to test my built u-boot payload, so I tried to build a QEMU ARM coreboot image. However, it failed to run and had the following output.
qemu: fatal: Trying to execute code outside RAM or ROM at 0xfffffffe
R00=00000000 R01=00011b70 R02=00000000 R03=ffffffff R04=00c51878 R05=00000147 R06=00000000 R07=00000000 R08=00000000 R09=00000000 R10=00000000 R11=00000000 R12=00000002 R13=000fffd8 R14=ffffffff R15=fffffffe PSR=600000ff -ZC- T sys32 s00=00000000 s01=00000000 d00=0000000000000000 s02=00000000 s03=00000000 d01=0000000000000000 s04=00000000 s05=00000000 d02=0000000000000000 s06=00000000 s07=00000000 d03=0000000000000000 s08=00000000 s09=00000000 d04=0000000000000000 s10=00000000 s11=00000000 d05=0000000000000000 s12=00000000 s13=00000000 d06=0000000000000000 s14=00000000 s15=00000000 d07=0000000000000000 s16=00000000 s17=00000000 d08=0000000000000000 s18=00000000 s19=00000000 d09=0000000000000000 s20=00000000 s21=00000000 d10=0000000000000000 s22=00000000 s23=00000000 d11=0000000000000000 s24=00000000 s25=00000000 d12=0000000000000000 s26=00000000 s27=00000000 d13=0000000000000000 s28=00000000 s29=00000000 d14=0000000000000000 s30=00000000 s31=00000000 d15=0000000000000000 s32=00000000 s33=00000000 d16=0000000000000000 s34=00000000 s35=00000000 d17=0000000000000000 s36=00000000 s37=00000000 d18=0000000000000000 s38=00000000 s39=00000000 d19=0000000000000000 s40=00000000 s41=00000000 d20=0000000000000000 s42=00000000 s43=00000000 d21=0000000000000000 s44=00000000 s45=00000000 d22=0000000000000000 s46=00000000 s47=00000000 d23=0000000000000000 s48=00000000 s49=00000000 d24=0000000000000000 s50=00000000 s51=00000000 d25=0000000000000000 s52=00000000 s53=00000000 d26=0000000000000000 s54=00000000 s55=00000000 d27=0000000000000000 s56=00000000 s57=00000000 d28=0000000000000000 s58=00000000 s59=00000000 d29=0000000000000000 s60=00000000 s61=00000000 d30=0000000000000000 s62=00000000 s63=00000000 d31=0000000000000000 FPSCR: 00000000
After I add '-S -s' option to QEMU, I found the problem is in bootblock_simple.c, and the `main()' function in gdb is:
0x00000192 in ?? () => 0x00000192: 08 b5 push {r3, lr} (gdb) disas $pc,+50 Dump of assembler code from 0x192 to 0x1c4: => 0x00000192: push {r3, lr} 0x00000194: bl 0x1704 0x00000198: bl 0x18c 0x0000019c: bl 0xd10 0x000001a0: bl 0x634 0x000001a4: bl 0x18e 0x000001a8: bl 0x190 0x000001ac: ldmia.w sp!, {r3, lr} 0x000001b0: b.w 0x159c 0x000001b4: push {r3, lr} 0x000001b6: mrc 15, 0, r3, cr1, cr0, {0} 0x000001ba: lsls r2, r3, #29 0x000001bc: bpl.n 0x1c4 0x000001be: bl 0x2ac 0x000001c2: b.n 0x1cc End of assembler dump. (gdb) si 0x00000194 in ?? () => 0x00000194: 01 f0 b6 fa bl 0x1704 (gdb) b *0x198 Breakpoint 3 at 0x198 (gdb) c Continuing.
Breakpoint 3, 0x00000198 in ?? () => 0x00000198: ff f7 f8 ff bl 0x18c (gdb) b *0x19c Breakpoint 4 at 0x19c (gdb) c Continuing.
Breakpoint 4, 0x0000019c in ?? () => 0x0000019c: 00 f0 b8 fd bl 0xd10 (gdb) b *0x1a0 Breakpoint 5 at 0x1a0 (gdb) c Continuing. Remote connection closed
So there may be something wrong when setting up the console, however I'm not so familiar with debugging the ROM so I don't know which function call raise the problem.
Thanks, Iru
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Iru Cai