From f5e48e94a2f4d4bbd6e5628c7f2afafc6dbcc459 Mon Sep 17 00:00:00 2001 From: Ian Moffett Date: Thu, 7 Mar 2024 17:28:52 -0500 Subject: build: Build mlibc + add distclean target Signed-off-by: Ian Moffett --- lib/mlibc/options/lsb/generic/auxv.cpp | 59 ---------------------------------- 1 file changed, 59 deletions(-) delete mode 100644 lib/mlibc/options/lsb/generic/auxv.cpp (limited to 'lib/mlibc/options/lsb/generic/auxv.cpp') diff --git a/lib/mlibc/options/lsb/generic/auxv.cpp b/lib/mlibc/options/lsb/generic/auxv.cpp deleted file mode 100644 index a4d2c8f..0000000 --- a/lib/mlibc/options/lsb/generic/auxv.cpp +++ /dev/null @@ -1,59 +0,0 @@ - -#include -#include -#include - -#include - -extern "C" uintptr_t *__dlapi_entrystack(); - -int peekauxval(unsigned long type, unsigned long *out) { - // Find the auxiliary vector by skipping args and environment. - auto aux = __dlapi_entrystack(); - aux += *aux + 1; // Skip argc and all arguments - __ensure(!*aux); - aux++; - while(*aux) // Now, we skip the environment. - aux++; - aux++; - - // Parse the auxiliary vector. - while(true) { - auto value = aux + 1; - if(*aux == AT_NULL) { - errno = ENOENT; - return -1; - }else if(*aux == type) { - *out = *value; - return 0; - } - aux += 2; - } -} - -unsigned long getauxval(unsigned long type) { - unsigned long value = 0; - if(peekauxval(type, &value)) - return 0; - return value; -} - -// XXX(qookie): -// This is here because libgcc will call into __getauxval on glibc Linux -// (which is what it believes we are due to the aarch64-linux-gnu toolchain) -// in order to find AT_HWCAP to discover if LSE atomics are supported. -// -// This is not necessary on a custom Linux toolchain and is purely an artifact of -// using the host toolchain. - -// __gnu_linux__ is the define checked by libgcc -#if defined(__aarch64__) && defined(__gnu_linux__) - -extern "C" unsigned long __getauxval(unsigned long type) { - unsigned long value = 0; - if(peekauxval(type, &value)) - return 0; - return value; -} - -#endif -- cgit v1.2.3