** Changed in: qemu
Status: New => Fix Committed
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https://bugs.launchpad.net/bugs/673613
Title:
ARM semihosting SYS_GET_CMDLINE does not return arguments
Status in QEMU:
Fix Committed
Bug description:
I have downloaded version 0.13.0 of the code, configured with: './configure'
'--prefix=/tmp/qemu-0.13.0'
'--interp-prefix=/tmp/qemu-0.13.0/usr/local/gnemul/qemu-%M'
'--target-list=arm-softmmu arm-linux-user armeb-linux-user'
and built using gcc version 4.3.2 (Debian 4.3.2-1.1). Execution environment is
Debian, kernel 2.6.26-2-686.
I am running a barebone helloworld.c which echoes its commandline arguments,
compiled with ADS1.2 from ARM. The arguments never get echoed back.
I have found the culprit in the source code, lines 3020 and 3022 of
linux-user/main.c which free target_argv[]. However, loader_exec(), which is
called a couple lines above, records the pointer to target_argv[]. So, when the
data is accessed in arm-semi.c, it is actually trying to load from memory that
has been free()d already.
This bug manifests itself for baremetal simulation, but I suspect it hits other
platforms as well.
