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Fix misaligned loads when loading UEFI arg pointers

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beetrees 2024-03-08 00:54:48 +00:00
parent 9c3ad802d9
commit 4bef0cca70
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1 changed files with 6 additions and 4 deletions
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10
compiler/rustc_codegen_ssa/src/base.rs
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@ -510,11 +510,13 @@ fn get_argc_argv<'a, 'tcx, Bx: BuilderMethods<'a, 'tcx>>(
// Params for UEFI
let param_handle = bx.get_param(0);
let param_system_table = bx.get_param(1);
let ptr_size = bx.tcx().data_layout.pointer_size;
let ptr_align = bx.tcx().data_layout.pointer_align.abi;
let arg_argc = bx.const_int(cx.type_isize(), 2);
let arg_argv = bx.alloca(cx.type_array(cx.type_ptr(), 2), Align::ONE);
bx.store(param_handle, arg_argv, Align::ONE);
let arg_argv_el1 = bx.gep(cx.type_ptr(), arg_argv, &[bx.const_int(cx.type_int(), 1)]);
bx.store(param_system_table, arg_argv_el1, Align::ONE);
let arg_argv = bx.alloca(cx.type_array(cx.type_ptr(), 2), ptr_align);
bx.store(param_handle, arg_argv, ptr_align);
let arg_argv_el1 = bx.inbounds_ptradd(arg_argv, bx.const_usize(ptr_size.bytes()));
bx.store(param_system_table, arg_argv_el1, ptr_align);
(arg_argc, arg_argv)
} else if cx.sess().target.main_needs_argc_argv {
// Params from native `main()` used as args for rust start function