Nixyri/zig
1
0
Fork 0
mirror of https://github.com/ziglang/zig.git synced 2024-11-30 08:10:13 +00:00
Code Issues Packages Projects Releases Wiki Activity

x86_64: deref GOT pointer when requesting var value

Browse Source
This commit is contained in:
Jakub Konka 2024-08-15 14:23:36 +02:00
parent 79418fa0ab
commit 4d5bf0f09a
1 changed files with 15 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
src/arch/x86_64/Lower.zig
View File

@ -402,7 +402,21 @@ fn emit(lower: *Lower, prefix: Prefix, mnemonic: Mnemonic, ops: []const Operand)
if (elf_sym.flags.is_extern_ptr) emit_mnemonic = .mov;
break :op .{ .mem = Memory.rip(mem_op.sib.ptr_size, 0) };
},
.mov => break :op .{ .mem = Memory.rip(mem_op.sib.ptr_size, 0) },
.mov => {
if (elf_sym.flags.is_extern_ptr) {
const reg = ops[0].reg;
lower.result_insts[lower.result_insts_len] =
try Instruction.new(.none, .mov, &[_]Operand{
.{ .reg = reg.to64() },
.{ .mem = Memory.rip(.qword, 0) },
});
lower.result_insts_len += 1;
break :op .{ .mem = Memory.sib(mem_op.sib.ptr_size, .{ .base = .{
.reg = reg.to64(),
} }) };
}
break :op .{ .mem = Memory.rip(mem_op.sib.ptr_size, 0) };
},
else => unreachable,
} else switch (mnemonic) {
.call => break :op .{ .mem = Memory.sib(mem_op.sib.ptr_size, .{