diff options
Diffstat (limited to 'meta/recipes-devtools/qemu/qemu/0006-qemu-Add-some-user-space-mmap-tweaks-to-address-musl.patch')
-rw-r--r-- | meta/recipes-devtools/qemu/qemu/0006-qemu-Add-some-user-space-mmap-tweaks-to-address-musl.patch | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/meta/recipes-devtools/qemu/qemu/0006-qemu-Add-some-user-space-mmap-tweaks-to-address-musl.patch b/meta/recipes-devtools/qemu/qemu/0006-qemu-Add-some-user-space-mmap-tweaks-to-address-musl.patch new file mode 100644 index 0000000000..5d1d7c6881 --- /dev/null +++ b/meta/recipes-devtools/qemu/qemu/0006-qemu-Add-some-user-space-mmap-tweaks-to-address-musl.patch @@ -0,0 +1,49 @@ +From 375cae3dd6151ef33cae8f243f6a2c2da6c0c356 Mon Sep 17 00:00:00 2001 +From: Richard Purdie <richard.purdie@linuxfoundation.org> +Date: Fri, 8 Jan 2021 17:27:06 +0000 +Subject: [PATCH 06/12] 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 <richard.purdie@linuxfoundation.org + +--- + linux-user/mmap.c | 10 +++++++--- + 1 file changed, 7 insertions(+), 3 deletions(-) + +Index: qemu-8.0.0/linux-user/mmap.c +=================================================================== +--- qemu-8.0.0.orig/linux-user/mmap.c ++++ qemu-8.0.0/linux-user/mmap.c +@@ -776,12 +776,16 @@ abi_long target_mremap(abi_ulong old_add + 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; + } + |