Renamed data/ into runtime/

[bold.git] / data / bold_ibh-x86_64.asm

diff --git a/data/bold_ibh-x86_64.asm b/data/bold_ibh-x86_64.asm
deleted file mode 100644 (file)
index 42a25b4..0000000
--- a/data/bold_ibh-x86_64.asm
+++ /dev/null
@@ -1,125 +0,0 @@
-; Bold - Import by hash for linux/amd64 (elf64-x86-64)
-; © 2009 Amand "alrj" Tihon
-; kate: syntax Intel x86 (NASM);
-
-; alrj's x86_64 version of the import by hash method by parapete, las, leblane.
-; See the wonderful thread at http://www.pouet.net/topic.php?which=5392 to
-; learn everything about import by hash on Linux.
-
-; Compile with
-; yasm -f elf64 -o bold_ibh-x86_64.o bold_ibh-x86_64.asm
-; (or replace yasm by nasm)
-
-
-BITS 64
-CPU X64
-
-global _bold__ibh
-global exit
-
-extern _dt_debug                        ; defined by bold linker
-extern _bold__functions_hash            ; in .data, generated by bold
-extern _bold__functions_pointers        ; in .bss, generated by bold
-extern _bold__functions_count           ; immediate 32 bits
-extern main                             ; must be declared when using this
-
-
-%define SYS_exit      60
-%define DT_HASH       4
-
-segment .text
-
-_bold__ibh:
-; {{{ Do the RTLD
-  mov rbx, [_dt_debug]                  ; rbx points to r_debug
-  mov rbx, [rbx + 8]                    ; rbx points to link_map
-  mov rbx, [rbx + 24]                   ; skip the first two link_map entries
-  mov rbx, [rbx + 24]
-
-  mov esi, _bold__functions_hash        ; Implicitly zero-extended
-  mov edi, _bold__functions_pointers    ; ditto
-  mov ecx, _bold__functions_count
-
-  ; Load all the symbols
-  .symbol_loop:
-    lodsd                               ; Load symbol hash in eax
-    push rsi
-    push rcx
-
-;   {{{ For each hash
-    mov r15d, eax                         ; Save function hash
-    mov r13, rbx                          ; copy link_map's pseudo-head
-
-    ; Iterate over libraries found in link_map
-    .libloop:
-      mov rdx, [r13 + 16]                 ; link_map->l_ld
-
-      ; Find the interesting entries in the DYNAMIC table.
-      .dynamic_loop:
-        xor eax, eax                      ; enough because hash was 32 bits
-
-        mov al, DT_HASH                   ; DT_HASH == 4
-        cmp [rdx], rax
-        cmove r9, [rdx+8]
-
-        inc al                            ; DT_STRTAB == 5
-        cmp [rdx], rax
-        cmove r10, [rdx+8]
-
-        inc al                            ; DT_SYMTAB == 6
-        cmp [rdx], rax
-        cmove r11, [rdx+8]
-
-        ; Next dynamic entry
-        add rdx, 16
-        xor al, al
-        cmp [rdx], rax
-        jnz .dynamic_loop
-
-      ; All DYNAMIC entries have been read.
-      mov ecx, [r9 + 4]                   ; nchain, number of exported symbols
-
-      ; Iterate over the symbols in the library (symtab entries).
-      .symbolloop:
-        ; Find the symbol name in strtab
-        mov esi, [r11]                    ; st_name, offset in strtab
-        add rsi, r10                      ; pointer to symbol name
-
-        ; Compute the hash
-        xor edx, edx
-        xor eax, eax
-        .hash_loop:                       ; over each char
-          imul edx, edx, byte 0x21
-          xor edx, eax
-          lodsb
-          test al, al
-          jnz short .hash_loop
-
-        .hash_end:
-        cmp edx, r15d                     ; Compare with stored hash
-        je .found
-        add r11, 24                       ; Next symtab entry
-      loop .symbolloop
-
-      ; Symbol was not found in this library
-      mov r13, [r13 + 24]                 ; Next link_map entry
-      jmp short .libloop
-    .found:
-    mov rax, [r11 + 8]                    ; st_value, offset of the symbol
-    add rax, [r13]                        ; add link_map->l_addr
-;   }}}
-
-    pop rcx
-    pop rsi
-    stosq                               ; Store function pointer
-    loop .symbol_loop
-; }}}
-
-  ; When all is resolved, call main()
-  call main
-  mov edi, eax
-
-exit:
-  ; Exit cleanly
-  mov eax, SYS_exit
-  syscall