diff options
Diffstat (limited to 'gdb/amd64-windows-tdep.c')
| -rw-r--r-- | gdb/amd64-windows-tdep.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/gdb/amd64-windows-tdep.c b/gdb/amd64-windows-tdep.c index 41e0efa..528fbb6 100644 --- a/gdb/amd64-windows-tdep.c +++ b/gdb/amd64-windows-tdep.c @@ -24,6 +24,7 @@ #include "gdbcore.h" #include "regcache.h" #include "windows-tdep.h" +#include "frame.h" /* The registers used to pass integer arguments during a function call. */ static int amd64_windows_dummy_call_integer_regs[] = @@ -154,6 +155,40 @@ amd64_skip_main_prologue (struct gdbarch *gdbarch, CORE_ADDR pc) return pc; } +/* Check Win64 DLL jmp trampolines and find jump destination. */ + +static CORE_ADDR +amd64_windows_skip_trampoline_code (struct frame_info *frame, CORE_ADDR pc) +{ + CORE_ADDR destination = 0; + struct gdbarch *gdbarch = get_frame_arch (frame); + enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); + + /* Check for jmp *<offset>(%rip) (jump near, absolute indirect (/4)). */ + if (pc && read_memory_unsigned_integer (pc, 2, byte_order) == 0x25ff) + { + /* Get opcode offset and see if we can find a reference in our data. */ + ULONGEST offset + = read_memory_unsigned_integer (pc + 2, 4, byte_order); + + /* Get address of function pointer at end of pc. */ + CORE_ADDR indirect_addr = pc + offset + 6; + + struct minimal_symbol *indsym + = indirect_addr ? lookup_minimal_symbol_by_pc (indirect_addr) : NULL; + const char *symname = indsym ? SYMBOL_LINKAGE_NAME (indsym) : NULL; + + if (symname) + { + if (strncmp (symname, "__imp_", 6) == 0 + || strncmp (symname, "_imp_", 5) == 0) + destination + = read_memory_unsigned_integer (indirect_addr, 8, byte_order); + } + } + + return destination; +} static void amd64_windows_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) @@ -174,6 +209,8 @@ amd64_windows_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) tdep->integer_param_regs_saved_in_caller_frame = 1; set_gdbarch_return_value (gdbarch, amd64_windows_return_value); set_gdbarch_skip_main_prologue (gdbarch, amd64_skip_main_prologue); + set_gdbarch_skip_trampoline_code (gdbarch, + amd64_windows_skip_trampoline_code); set_gdbarch_iterate_over_objfiles_in_search_order (gdbarch, windows_iterate_over_objfiles_in_search_order); |