diff options
Diffstat (limited to 'mdk-stage1/dietlibc/x86_64/start.S')
| -rw-r--r-- | mdk-stage1/dietlibc/x86_64/start.S | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/mdk-stage1/dietlibc/x86_64/start.S b/mdk-stage1/dietlibc/x86_64/start.S new file mode 100644 index 000000000..5e8356350 --- /dev/null +++ b/mdk-stage1/dietlibc/x86_64/start.S @@ -0,0 +1,55 @@ +#include "dietfeatures.h" + +.text +.global _start +_start: +#ifdef WANT_DYNAMIC + movq %rdx, %rcx /* %rcx = dynamic fini */ +#endif + popq %rdi /* %rdi = argc */ + movq %rsp,%rsi /* %rsi = argv */ + pushq %rdi + + leaq 8(%rsi,%rdi,8),%rdx /* %rdx = envp = (8*rdi)+%rsi+8 */ + +#ifdef __DYN_LIB + movq environ@GOTPCREL(%rip), %rax + movq %rdx, (%rax) +#else + movq %rdx, environ(%rip) +#endif + +#ifdef PROFILING + pushq %rdi /* save reg args */ + pushq %rsi + pushq %rdx + pushq %rcx + + leaq _etext(%rip), %rsi /* highpc */ + leaq .text(%rip), %rdi /* lowpc */ + call monitor + + popq %rcx /* restore reg args */ + popq %rdx + popq %rsi + popq %rdi +#endif + +#ifdef WANT_DYNAMIC + call _dyn_start +#else + call main +#endif + +#ifdef PROFILING + pushq %rax + call _stop_monitor + popq %rdi +#else + movq %rax, %rdi /* return value */ +#endif + call exit + hlt +.Lstart: + .size _start,.Lstart-_start + |