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native: fix stackframe bug on return statements (#12153)

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pancake 2021-10-12 05:03:44 +02:00 committed by GitHub
parent 0fafefc078
commit 5eba02ea94
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2 changed files with 5 additions and 4 deletions
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6
vlib/v/gen/native/amd64.v
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@ -1369,8 +1369,8 @@ fn (mut g Gen) fn_decl(node ast.FnDecl) {
g.push(.rbp)
g.mov_rbp_rsp()
locals_count := node.scope.objects.len + node.params.len
stackframe_size := (locals_count * 8) + 0x10
g.sub8(.rsp, stackframe_size)
g.stackframe_size = (locals_count * 8) + 0x10
g.sub8(.rsp, g.stackframe_size)
if node.params.len > 0 {
// g.mov(.r12, 0x77777777)
@ -1395,7 +1395,7 @@ fn (mut g Gen) fn_decl(node ast.FnDecl) {
return
}
// g.leave()
g.add8(.rsp, stackframe_size)
g.add8(.rsp, g.stackframe_size)
g.pop(.rbp)
g.ret()
}

3
vlib/v/gen/native/gen.v
View File

@ -32,6 +32,7 @@ mut:
sect_header_name_pos int
offset i64
str_pos []i64
stackframe_size int
strings []string // TODO use a map and don't duplicate strings
file_size_pos i64
main_fn_addr i64
@ -477,7 +478,7 @@ fn (mut g Gen) stmt(node ast.Stmt) {
}
}
// intel specific
g.add8(.rsp, 0x20) // XXX depends on scope frame size
g.add8(.rsp, g.stackframe_size)
g.pop(.rbp)
g.ret()
}