diff options
Diffstat (limited to 'tools/include/nolibc/arch-s390.h')
| -rw-r--r-- | tools/include/nolibc/arch-s390.h | 77 |
1 files changed, 13 insertions, 64 deletions
diff --git a/tools/include/nolibc/arch-s390.h b/tools/include/nolibc/arch-s390.h index 516dff5bff8b..5d60fd43f883 100644 --- a/tools/include/nolibc/arch-s390.h +++ b/tools/include/nolibc/arch-s390.h @@ -9,31 +9,7 @@ #include <asm/unistd.h> #include "compiler.h" - -/* The struct returned by the stat() syscall, equivalent to stat64(). The - * syscall returns 116 bytes and stops in the middle of __unused. - */ - -struct sys_stat_struct { - unsigned long st_dev; - unsigned long st_ino; - unsigned long st_nlink; - unsigned int st_mode; - unsigned int st_uid; - unsigned int st_gid; - unsigned int __pad1; - unsigned long st_rdev; - unsigned long st_size; - unsigned long st_atime; - unsigned long st_atime_nsec; - unsigned long st_mtime; - unsigned long st_mtime_nsec; - unsigned long st_ctime; - unsigned long st_ctime_nsec; - unsigned long st_blksize; - long st_blocks; - unsigned long __unused[3]; -}; +#include "crt.h" /* Syscalls for s390: * - registers are 64-bit @@ -52,7 +28,7 @@ struct sys_stat_struct { register long _num __asm__ ("1") = (num); \ register long _rc __asm__ ("2"); \ \ - __asm__ volatile ( \ + __asm__ volatile ( \ "svc 0\n" \ : "=d"(_rc) \ : "d"(_num) \ @@ -66,7 +42,7 @@ struct sys_stat_struct { register long _num __asm__ ("1") = (num); \ register long _arg1 __asm__ ("2") = (long)(arg1); \ \ - __asm__ volatile ( \ + __asm__ volatile ( \ "svc 0\n" \ : "+d"(_arg1) \ : "d"(_num) \ @@ -81,7 +57,7 @@ struct sys_stat_struct { register long _arg1 __asm__ ("2") = (long)(arg1); \ register long _arg2 __asm__ ("3") = (long)(arg2); \ \ - __asm__ volatile ( \ + __asm__ volatile ( \ "svc 0\n" \ : "+d"(_arg1) \ : "d"(_arg2), "d"(_num) \ @@ -97,7 +73,7 @@ struct sys_stat_struct { register long _arg2 __asm__ ("3") = (long)(arg2); \ register long _arg3 __asm__ ("4") = (long)(arg3); \ \ - __asm__ volatile ( \ + __asm__ volatile ( \ "svc 0\n" \ : "+d"(_arg1) \ : "d"(_arg2), "d"(_arg3), "d"(_num) \ @@ -114,7 +90,7 @@ struct sys_stat_struct { register long _arg3 __asm__ ("4") = (long)(arg3); \ register long _arg4 __asm__ ("5") = (long)(arg4); \ \ - __asm__ volatile ( \ + __asm__ volatile ( \ "svc 0\n" \ : "+d"(_arg1) \ : "d"(_arg2), "d"(_arg3), "d"(_arg4), "d"(_num) \ @@ -132,7 +108,7 @@ struct sys_stat_struct { register long _arg4 __asm__ ("5") = (long)(arg4); \ register long _arg5 __asm__ ("6") = (long)(arg5); \ \ - __asm__ volatile ( \ + __asm__ volatile ( \ "svc 0\n" \ : "+d"(_arg1) \ : "d"(_arg2), "d"(_arg3), "d"(_arg4), "d"(_arg5), \ @@ -152,7 +128,7 @@ struct sys_stat_struct { register long _arg5 __asm__ ("6") = (long)(arg5); \ register long _arg6 __asm__ ("7") = (long)(arg6); \ \ - __asm__ volatile ( \ + __asm__ volatile ( \ "svc 0\n" \ : "+d"(_arg1) \ : "d"(_arg2), "d"(_arg3), "d"(_arg4), "d"(_arg5), \ @@ -162,41 +138,14 @@ struct sys_stat_struct { _arg1; \ }) -char **environ __attribute__((weak)); -const unsigned long *_auxv __attribute__((weak)); - /* startup code */ -void __attribute__((weak,noreturn,optimize("omit-frame-pointer"))) __no_stack_protector _start(void) +void __attribute__((weak, noreturn, optimize("Os", "omit-frame-pointer"))) __no_stack_protector _start(void) { __asm__ volatile ( - "lg %r2,0(%r15)\n" /* argument count */ - "la %r3,8(%r15)\n" /* argument pointers */ - - "xgr %r0,%r0\n" /* r0 will be our NULL value */ - /* search for envp */ - "lgr %r4,%r3\n" /* start at argv */ - "0:\n" - "clg %r0,0(%r4)\n" /* entry zero? */ - "la %r4,8(%r4)\n" /* advance pointer */ - "jnz 0b\n" /* no -> test next pointer */ - /* yes -> r4 now contains start of envp */ - "larl %r1,environ\n" - "stg %r4,0(%r1)\n" - - /* search for auxv */ - "lgr %r5,%r4\n" /* start at envp */ - "1:\n" - "clg %r0,0(%r5)\n" /* entry zero? */ - "la %r5,8(%r5)\n" /* advance pointer */ - "jnz 1b\n" /* no -> test next pointer */ - "larl %r1,_auxv\n" /* yes -> store value in _auxv */ - "stg %r5,0(%r1)\n" - - "aghi %r15,-160\n" /* allocate new stackframe */ - "xc 0(8,%r15),0(%r15)\n" /* clear backchain */ - "brasl %r14,main\n" /* ret value of main is arg to exit */ - "lghi %r1,1\n" /* __NR_exit */ - "svc 0\n" + "lgr %r2, %r15\n" /* save stack pointer to %r2, as arg1 of _start_c */ + "aghi %r15, -160\n" /* allocate new stackframe */ + "xc 0(8,%r15), 0(%r15)\n" /* clear backchain */ + "brasl %r14, _start_c\n" /* transfer to c runtime */ ); __builtin_unreachable(); } |