diff options
| -rw-r--r-- | libc/sysdeps/linux/x86_64/crt0.S | 30 |
1 files changed, 24 insertions, 6 deletions
diff --git a/libc/sysdeps/linux/x86_64/crt0.S b/libc/sysdeps/linux/x86_64/crt0.S index 82dd9a9df..fa08278d9 100644 --- a/libc/sysdeps/linux/x86_64/crt0.S +++ b/libc/sysdeps/linux/x86_64/crt0.S @@ -92,12 +92,25 @@ _start: rtld_fini: %r9 stack_end: stack. */ +#if 0 + /* glibc */ movq %rdx, %r9 /* Address of the shared library termination function. */ popq %rsi /* Pop the argument count. */ movq %rsp, %rdx /* argv starts just at the current stack top. */ movq %rsi, %rbx /* now we calc envp ... envp = argc */ + addq $8, %rbx shl $0x3, %rbx /* envp *= 8 */ addq %rdx, %rbx /* envp += argv */ +#else + /* uclibc */ + movq %rdx, %r9 /* Address of the shared library termination function. */ + popq %rdi /* Pop the argument count. */ + movq %rsp, %rsi /* argv starts just at the current stack top. */ + movq %rdi, %rdx /* now we calc envp ... envp = argc */ + addq $8, %rdx + shl $0x3, %rdx /* envp *= 8 */ + addq %rsi, %rdx /* envp += argv */ +#endif /* Align the stack to a 16 byte boundary to follow the ABI. */ andq $~15, %rsp @@ -127,9 +140,11 @@ _start: #endif /* Push envp, argc, and argc arguments to __uClibc_start_main() on the stack */ - pushq %rbx /* Environment pointer */ - pushq %rdx /* Argument pointer */ - pushq %rsi /* And the argument count */ +#if 0 + pushq %rdx /* Environment pointer */ + pushq %rsi /* Argument pointer */ + pushq %rdi /* And the argument count */ +#endif /* Ok, now run uClibc's main() -- shouldn't return */ #ifdef L_Scrt1 @@ -138,10 +153,13 @@ _start: call __uClibc_start_main #endif #else + /* Push envp, argc, and argc arguments to __uClibc_start_main() on the stack */ - pushq %rbx /* Environment pointer */ - pushq %rdx /* Argument pointer */ - pushq %rsi /* And the argument count */ +#if 0 + pushq %rdx /* Environment pointer */ + pushq %rsi /* Argument pointer */ + pushq %rdi /* And the argument count */ +#endif #ifdef L_Scrt0 call *__uClibc_main@GOT(%rip) |