I think this is fixed now - it would be useful if the OP could confirm
with the current state of master.
** Changed in: qemu
Status: In Progress => Fix Committed
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https://bugs.launchpad.net/bugs/1918302
Title:
qemu-system-arm segfaults while servicing SYS_HEAPINFO
Status in QEMU:
Fix Committed
Bug description:
I compiled QEMU version 5.2.0 from source on Ubuntu 18.04, and tried
to use it to run the attached bare-metal Arm hello-world image, using
the command line
qemu-system-arm -M microbit -semihosting -nographic -device
loader,file=hello.hex
The result was that qemu-system-arm itself died of a segfault.
Compiling it for debugging, the location of the segfault was in
target/arm/arm-semi.c, in the case handler for the semihosting call
TARGET_SYS_HEAPINFO, on line 1020 which assigns to 'rambase':
const struct arm_boot_info *info = env->boot_info;
target_ulong rambase = info->loader_start;
and the problem seems to be that 'info', aka env->boot_info, is NULL
in this context.
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