ed/raddebugger
1
0
Fork 0
mirror of https://github.com/Ed94/raddebugger.git synced 2026-06-13 07:32:23 -07:00
Code Issues Packages Projects Releases Wiki Activity

line step into -> if call redirects to a function dispatch unconditional jump table, move stopper trap in trap net to unconditional jump destination, and skip the jump table entirely

Browse Source
This commit is contained in:
Ryan Fleury
2024-01-14 07:02:30 -08:00
parent 0c497abba6
commit 5fe3f56d33
1 changed files with 17 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/df/core/df_core.c
+17
View File
@@ -2869,6 +2869,23 @@ df_trap_net_from_thread__step_into_line(Arena *arena, DF_Entity *thread)
{
trap_addr = point->jump_dest_vaddr;
flags &= ~CTRL_TrapFlag_SingleStepAfterHit;
// rjf: read instruction one layer deep after a jump and determine if
// it is just jumping to an unconditional jump (e.g. a function
// dispatch table) - if so, then just follow one more layer
String8 dst_machine_code = {0};
dst_machine_code.str = push_array_no_zero(scratch.arena, U8, max_instruction_size_from_arch(arch));
dst_machine_code.size = ctrl_process_read(process->ctrl_machine_id, process->ctrl_handle, r1u64(trap_addr, trap_addr+max_instruction_size_from_arch(arch)), dst_machine_code.str);
if(dst_machine_code.size != 0)
{
DF_Inst inst = df_single_inst_from_machine_code(scratch.arena, arch, 0, dst_machine_code);
if((inst.flags & DF_InstFlag_UnconditionalJump ||
inst.flags & DF_InstFlag_Call) &&
inst.rel_voff != 0)
{
trap_addr = (U64)(trap_addr + (S64)((S32)inst.rel_voff));
}
}
}
}