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demon helper for reading cstrings

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This commit is contained in:
Nikita Smith
2024-10-17 18:06:05 -07:00
parent 72f987533c
commit 652dcafbbf
2 changed files with 31 additions and 0 deletions
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src/demon/demon_core.c
+30
View File
@@ -156,3 +156,33 @@ dmn_rsp_from_thread(DMN_Handle thread)
scratch_end(scratch);
return result;
}
////////////////////////////////
//~ Memory Helpers
internal String8
dmn_process_read_cstring(Arena *arena, DMN_Handle process, U64 addr)
{
Temp scratch = scratch_begin(&arena, 1);
String8List block_list = {0};
for(U64 cursor = addr, stride = 256; ; cursor += stride)
{
U8 *raw_block = push_array_no_zero(scratch.arena, U8, stride);
U64 read_size = dmn_process_read(process, r1u64(cursor, cursor + stride), raw_block);
String8 block = str8_cstring_capped(raw_block, raw_block + read_size);
str8_list_push(scratch.arena, &block_list, block);
if(read_size != stride || (block.size+1 <= read_size && block.str[block.size] == 0))
{
break;
}
}
String8 result = str8_list_join(arena, &block_list, 0);
scratch_end(scratch);
return result;
}
src/demon/demon_core.h
+1
View File
@@ -226,6 +226,7 @@ internal U64 dmn_process_read(DMN_Handle process, Rng1U64 range, void *dst);
internal B32 dmn_process_write(DMN_Handle process, Rng1U64 range, void *src);
#define dmn_process_read_struct(process, vaddr, ptr) dmn_process_read((process), r1u64((vaddr), (vaddr)+(sizeof(*ptr))), ptr)
#define dmn_process_write_struct(process, vaddr, ptr) dmn_process_write((process), r1u64((vaddr), (vaddr)+(sizeof(*ptr))), ptr)
internal String8 dmn_process_read_cstring(Arena *arena, DMN_Handle process, U64 addr);
//- rjf: threads
internal Arch dmn_arch_from_thread(DMN_Handle handle);