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libc: Parse environment from entry stack

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Alexander van der Grinten 2018-01-03 15:41:53 +01:00
parent 678871293b
commit 1241521276
1 changed files with 16 additions and 1 deletions
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17
libc/platform/x86_64-managarm/src/entry.cpp
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@ -17,6 +17,8 @@ void __mlibc_initLocale();
// defined by the POSIX library
void __mlibc_initStdio();
extern "C" uintptr_t *__dlapi_entrystack();
// declared in posix-pipe.hpp
thread_local Queue globalQueue;
@ -54,9 +56,22 @@ static LibraryGuard guard;
LibraryGuard::LibraryGuard() {
__mlibc_initLocale();
__mlibc_initStdio();
// Parse the environment.
auto env = __dlapi_entrystack();
env += *env + 1; // Skip argc and all arguments.
__ensure(!*env);
env++;
while(*env) {
auto string = reinterpret_cast<char *>(*env);
auto fail = putenv(string);
__ensure(!fail);
env++;
}
}
// not declared in any header
// The environmet was build by the LibraryGuard.
extern char **environ;
extern "C" void __mlibc_entry(int (*main_function)(int argc, char *argv[], char *env[])) {