diff options
| -rw-r--r-- | tools/include/nolibc/arch-arm.h | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/tools/include/nolibc/arch-arm.h b/tools/include/nolibc/arch-arm.h index 48bd95492c87..79666b590e87 100644 --- a/tools/include/nolibc/arch-arm.h +++ b/tools/include/nolibc/arch-arm.h @@ -196,6 +196,8 @@ struct sys_stat_struct { _arg1; \ }) +char **environ __attribute__((weak)); + /* startup code */ void __attribute__((weak,noreturn,optimize("omit-frame-pointer"))) _start(void) { @@ -206,6 +208,8 @@ void __attribute__((weak,noreturn,optimize("omit-frame-pointer"))) _start(void) "add %r2, %r0, $1\n" // envp = (argc + 1) ... "lsl %r2, %r2, $2\n" // * 4 ... "add %r2, %r2, %r1\n" // + argv + "ldr %r3, 1f\n" // r3 = &environ (see below) + "str %r2, [r3]\n" // store envp into environ "mov %r3, $8\n" // AAPCS : sp must be 8-byte aligned in the "neg %r3, %r3\n" // callee, and bl doesn't push (lr=pc) @@ -215,7 +219,10 @@ void __attribute__((weak,noreturn,optimize("omit-frame-pointer"))) _start(void) "bl main\n" // main() returns the status code, we'll exit with it. "movs r7, $1\n" // NR_exit == 1 "svc $0x00\n" - ); + ".align 2\n" // below are the pointers to a few variables + "1:\n" + ".word environ\n" + ); __builtin_unreachable(); } |