[Bug 1918302] Re: qemu-system-arm segfaults while servicing SYS_HEAPINFO

[Thomas Huth]

This is an automated cleanup. This bug report has been moved
to QEMU's new bug tracker on gitlab.com and thus gets marked
as 'expired' now. Please continue with the discussion here:

 https://gitlab.com/qemu-project/qemu/-/issues/61


** Changed in: qemu
       Status: Confirmed => Expired

** Changed in: qemu
     Assignee: Alex Bennée (ajbennee) => (unassigned)

** Bug watch added: gitlab.com/qemu-project/qemu/-/issues #61
   https://gitlab.com/qemu-project/qemu/-/issues/61

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https://bugs.launchpad.net/bugs/1918302

Title:
  qemu-system-arm segfaults while servicing SYS_HEAPINFO

Status in QEMU:
  Expired

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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