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dwarf: update the pc register

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kcbanner 2023-07-18 02:04:48 -04:00
parent d99b40d38b
commit 2bc2b01dbc
1 changed files with 8 additions and 10 deletions
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8
lib/std/dwarf.zig
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@ -1796,12 +1796,12 @@ pub const DwarfInfo = struct {
}; };
var update_tail: ?*RegisterUpdate = null; var update_tail: ?*RegisterUpdate = null;
var has_next_ip = false;
for (context.vm.rowColumns(row)) |column| { for (context.vm.rowColumns(row)) |column| {
if (column.register) |register| { if (column.register) |register| {
if (register == cie.return_address_register) { if (register == cie.return_address_register) {
has_next_ip = column.rule != .undefined; has_next_ip = column.rule != .undefined;
} }
std.debug.print(" updated {}\n", .{register});
const old_value = try abi.regBytes(context.thread_context, register, context.reg_context); const old_value = try abi.regBytes(context.thread_context, register, context.reg_context);
const new_value = try update_allocator.alloc(u8, old_value.len); const new_value = try update_allocator.alloc(u8, old_value.len);
@ -1828,15 +1828,13 @@ pub const DwarfInfo = struct {
update_tail = tail.prev; update_tail = tail.prev;
} }
if (has_next_ip) {
context.pc = abi.stripInstructionPtrAuthCode(mem.readIntSliceNative(usize, try abi.regBytes( context.pc = abi.stripInstructionPtrAuthCode(mem.readIntSliceNative(usize, try abi.regBytes(
context.thread_context, context.thread_context,
cie.return_address_register, cie.return_address_register,
context.reg_context, context.reg_context,
))); )));
} else { (try abi.regValueNative(usize, context.thread_context, abi.ipRegNum(), context.reg_context)).* = context.pc;
context.pc = 0; std.debug.print(" new context.pc: 0x{x}\n", .{context.pc});
}
(try abi.regValueNative(usize, context.thread_context, abi.spRegNum(context.reg_context), context.reg_context)).* = context.cfa.?; (try abi.regValueNative(usize, context.thread_context, abi.spRegNum(context.reg_context), context.reg_context)).* = context.cfa.?;