loader based trace using musl

[ldtrace] / loader / w / stub.h

__asm__(
#define T(i,f) "\n" \
".global " #f "\n" \
".type " #f ",@function\n" \
#f ":\n" \
"       pushl %esp\n" \
"       pushl $" #i "\n" \
"       call enter\n" \
"       pop %eax\n" \
"       pop %eax\n" \
"       jmp __real_" #f "\n"

#include "tab.h"
#undef T
"\n"
"after:\n"
"       push %eax\n"
"       push %edx\n"
"       call leave\n"
"       mov %eax,%ecx\n"
"       pop %edx\n"
"       pop %eax\n"
"       push %ecx\n"
"       ret\n"
);