diff options
Diffstat (limited to 'pkg/qbe/patch/0001-arm64-prevent-stack-clobber-when-passing-structures-.patch')
| -rw-r--r-- | pkg/qbe/patch/0001-arm64-prevent-stack-clobber-when-passing-structures-.patch | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/pkg/qbe/patch/0001-arm64-prevent-stack-clobber-when-passing-structures-.patch b/pkg/qbe/patch/0001-arm64-prevent-stack-clobber-when-passing-structures-.patch new file mode 100644 index 00000000..ca21a84f --- /dev/null +++ b/pkg/qbe/patch/0001-arm64-prevent-stack-clobber-when-passing-structures-.patch @@ -0,0 +1,33 @@ +From 6c1744026545445511f1c500653bab859bc79b50 Mon Sep 17 00:00:00 2001 +From: Michael Forney <mforney@mforney.org> +Date: Sat, 11 May 2019 19:38:13 -0700 +Subject: [PATCH] arm64: prevent stack clobber when passing structures < 8 + bytes + +--- + arm64/abi.c | 4 +++- + 1 file changed, 3 insertions(+), 1 deletion(-) + +diff --git a/arm64/abi.c b/arm64/abi.c +index 8209944..f37c892 100644 +--- a/arm64/abi.c ++++ b/arm64/abi.c +@@ -312,12 +312,14 @@ stkblob(Ref r, Class *c, Fn *fn, Insl **ilp) + { + Insl *il; + int al; ++ uint64_t sz; + + il = alloc(sizeof *il); + al = c->t->align - 2; /* NAlign == 3 */ + if (al < 0) + al = 0; +- il->i = (Ins){Oalloc+al, Kl, r, {getcon(c->t->size, fn)}}; ++ sz = c->class & Cptr ? c->t->size : c->size; ++ il->i = (Ins){Oalloc+al, Kl, r, {getcon(sz, fn)}}; + il->link = *ilp; + *ilp = il; + } +-- +2.32.0 + |