ci: Add QEMU package automation

Author: oleavr

.github/patches/qemu/0001-add-some-user-space-mmap-tweaks-to-address-musl.patch

@@ -0,0 +1,47 @@
+From 76efeccfd73a76834ac1c75d3c94de1899085714 Mon Sep 17 00:00:00 2001
+From: Richard Purdie <[email protected]>
+Date: Fri, 8 Jan 2021 17:27:06 +0000
+Subject: [PATCH] qemu: Add some user space mmap tweaks to address musl 32 bit
+
+When using qemu-i386 to build qemux86 webkitgtk on musl, it sits in an
+infinite loop of mremap calls of ever decreasing/increasing addresses.
+
+I suspect something in the musl memory allocation code loops indefinitely
+if it only sees ENOMEM and only exits when it hits EFAULT.
+
+According to the docs, trying to mremap outside the address space
+can/should return EFAULT and changing this allows the build to succeed.
+
+A better return value for the other cases of invalid addresses is EINVAL
+rather than ENOMEM so adjust the other part of the test to this.
+
+Upstream-Status: Submitted [https://lists.gnu.org/archive/html/qemu-devel/2021-01/msg01355.html]
+Signed-off-by: Richard Purdie <[email protected]
+---
+ linux-user/mmap.c | 10 +++++++---
+ 1 file changed, 7 insertions(+), 3 deletions(-)
+
+diff --git a/linux-user/mmap.c b/linux-user/mmap.c
+index e4bf5d5f3..04d920c11 100644
+--- a/linux-user/mmap.c
++++ b/linux-user/mmap.c
+@@ -879,12 +879,16 @@ abi_long target_mremap(abi_ulong old_addr, abi_ulong old_size,
+     int prot;
+     void *host_addr;
+ 
+-    if (!guest_range_valid_untagged(old_addr, old_size) ||
+-        ((flags & MREMAP_FIXED) &&
++    if (!guest_range_valid_untagged(old_addr, old_size)) {
++        errno = EFAULT;
++        return -1;
++    }
++
++    if (((flags & MREMAP_FIXED) &&
+          !guest_range_valid_untagged(new_addr, new_size)) ||
+         ((flags & MREMAP_MAYMOVE) == 0 &&
+          !guest_range_valid_untagged(old_addr, new_size))) {
+-        errno = ENOMEM;
++        errno = EINVAL;
+         return -1;
+     }
+ 

.github/patches/qemu/0002-apic-fixup-fallthrough-to-PIC.patch

@@ -0,0 +1,43 @@
+From 1ba58dbd2dce4e6ccaf3be3ad5c9ecc22565313f Mon Sep 17 00:00:00 2001
+From: Mark Asselstine <[email protected]>
+Date: Tue, 26 Feb 2013 11:43:28 -0500
+Subject: [PATCH] apic: fixup fallthrough to PIC
+
+Commit 0e21e12bb311c4c1095d0269dc2ef81196ccb60a [Don't route PIC
+interrupts through the local APIC if the local APIC config says so.]
+missed a check to ensure the local APIC is enabled. Since if the local
+APIC is disabled it doesn't matter what the local APIC config says.
+
+If this check isn't done and the guest has disabled the local APIC the
+guest will receive a general protection fault, similar to what is seen
+here:
+
+https://lists.gnu.org/archive/html/qemu-devel/2012-12/msg02304.html
+
+The GPF is caused by an attempt to service interrupt 0xffffffff. This
+comes about since cpu_get_pic_interrupt() calls apic_accept_pic_intr()
+(with the local APIC disabled apic_get_interrupt() returns -1).
+apic_accept_pic_intr() returns 0 and thus the interrupt number which
+is returned from cpu_get_pic_interrupt(), and which is attempted to be
+serviced, is -1.
+
+Signed-off-by: Mark Asselstine <[email protected]>
+Upstream-Status: Submitted [https://lists.gnu.org/archive/html/qemu-devel/2013-04/msg00878.html]
+Signed-off-by: He Zhe <[email protected]>
+---
+ hw/intc/apic.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/hw/intc/apic.c b/hw/intc/apic.c
+index 4186c57b3..43cd805a9 100644
+--- a/hw/intc/apic.c
++++ b/hw/intc/apic.c
+@@ -607,7 +607,7 @@ int apic_accept_pic_intr(DeviceState *dev)
+     APICCommonState *s = APIC(dev);
+     uint32_t lvt0;
+ 
+-    if (!s)
++    if (!s || !(s->spurious_vec & APIC_SV_ENABLE))
+         return -1;
+ 
+     lvt0 = s->lvt[APIC_LVT_LINT0];

.github/workflows/qemu.yml

@@ -0,0 +1,38 @@
+name: QEMU
+
+on:
+  workflow_dispatch:
+    inputs:
+      version:
+        description: "Version"
+        default: "20250317"
+
+jobs:
+  qemu:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out repo
+        uses: actions/checkout@v4
+      - name: Build
+        run: |
+          sudo sed -i 's,Types: deb,Types: deb deb-src,' /etc/apt/sources.list.d/ubuntu.sources
+          sudo apt-get update
+          sudo apt-get install -y devscripts
+          mkdir build
+          cd build
+          sudo apt-get build-dep -y qemu
+          apt-get source qemu
+          cd qemu-*
+          for file in ../../.github/patches/qemu/*.patch; do
+            patch -p1 < $file
+          done
+          export DEBFULLNAME="Ole André Vadla Ravnås"
+          export DEBEMAIL="[email protected]"
+          dch --local frida "Apply patches needed for Frida's use-cases."
+          dpkg-buildpackage -uc -us -b
+      - name: Release
+        uses: softprops/action-gh-release@v2
+        with:
+          tag_name: ${{ github.event.inputs.version }}
+          body: "Roll packages."
+          files: build/*.deb