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Hi!
ldd ATM (and any other info displayed by ld.so) doesn't print anything.
The problem is that as Alpha's INTERNAL_SYSCALL (unlike all other arches)
lacks __volatile__ asms, compiler optimizes the writev syscall in dl-misc.c
out. The following patch also shuts up warnings about unused ChEcK variable.
2003-01-21 Jakub Jelinek <jakub@redhat.com>
* sysdeps/unix/alpha/sysdep.h (inline_syscall0,
inline_syscall1, inline_syscall2, inline_syscall3,
inline_syscall4, inline_syscall5, inline_syscall6): Add __volatile__.
* sysdeps/unix/sysv/linux/alpha/sysdep.h (INTERNAL_SYSCALL): Add
__attribute__((unused)) to ChEcK.
--- libc/sysdeps/unix/alpha/sysdep.h.jj 2003-01-14 16:04:07.000000000 +0100
+++ libc/sysdeps/unix/alpha/sysdep.h 2003-01-21 21:12:42.000000000 +0100
@@ -193,12 +193,13 @@ $syscall_error: \
register long _sc_19 __asm__("$19"); \
\
_sc_0 = __NR_##name; \
- __asm__("callsys # %0 %1 <= %2" \
- : inline_syscall_r0_out_constraint (_sc_0), \
- "=r"(_sc_19) \
- : "0"(_sc_0) \
- : inline_syscall_clobbers, \
- "$16", "$17", "$18", "$20", "$21"); \
+ __asm__ __volatile__ \
+ ("callsys # %0 %1 <= %2" \
+ : inline_syscall_r0_out_constraint (_sc_0), \
+ "=r"(_sc_19) \
+ : "0"(_sc_0) \
+ : inline_syscall_clobbers, \
+ "$16", "$17", "$18", "$20", "$21"); \
_sc_ret = _sc_0, _sc_err = _sc_19; \
}
@@ -210,12 +211,13 @@ $syscall_error: \
\
_sc_0 = __NR_##name; \
_sc_16 = (long) (arg1); \
- __asm__("callsys # %0 %1 <= %2 %3" \
- : inline_syscall_r0_out_constraint (_sc_0), \
- "=r"(_sc_19), "=r"(_sc_16) \
- : "0"(_sc_0), "2"(_sc_16) \
- : inline_syscall_clobbers, \
- "$17", "$18", "$20", "$21"); \
+ __asm__ __volatile__ \
+ ("callsys # %0 %1 <= %2 %3" \
+ : inline_syscall_r0_out_constraint (_sc_0), \
+ "=r"(_sc_19), "=r"(_sc_16) \
+ : "0"(_sc_0), "2"(_sc_16) \
+ : inline_syscall_clobbers, \
+ "$17", "$18", "$20", "$21"); \
_sc_ret = _sc_0, _sc_err = _sc_19; \
}
@@ -229,12 +231,13 @@ $syscall_error: \
_sc_0 = __NR_##name; \
_sc_16 = (long) (arg1); \
_sc_17 = (long) (arg2); \
- __asm__("callsys # %0 %1 <= %2 %3 %4" \
- : inline_syscall_r0_out_constraint (_sc_0), \
- "=r"(_sc_19), "=r"(_sc_16), "=r"(_sc_17) \
- : "0"(_sc_0), "2"(_sc_16), "3"(_sc_17) \
- : inline_syscall_clobbers, \
- "$18", "$20", "$21"); \
+ __asm__ __volatile__ \
+ ("callsys # %0 %1 <= %2 %3 %4" \
+ : inline_syscall_r0_out_constraint (_sc_0), \
+ "=r"(_sc_19), "=r"(_sc_16), "=r"(_sc_17) \
+ : "0"(_sc_0), "2"(_sc_16), "3"(_sc_17) \
+ : inline_syscall_clobbers, \
+ "$18", "$20", "$21"); \
_sc_ret = _sc_0, _sc_err = _sc_19; \
}
@@ -250,13 +253,14 @@ $syscall_error: \
_sc_16 = (long) (arg1); \
_sc_17 = (long) (arg2); \
_sc_18 = (long) (arg3); \
- __asm__("callsys # %0 %1 <= %2 %3 %4 %5" \
- : inline_syscall_r0_out_constraint (_sc_0), \
- "=r"(_sc_19), "=r"(_sc_16), "=r"(_sc_17), \
- "=r"(_sc_18) \
- : "0"(_sc_0), "2"(_sc_16), "3"(_sc_17), \
- "4"(_sc_18) \
- : inline_syscall_clobbers, "$20", "$21"); \
+ __asm__ __volatile__ \
+ ("callsys # %0 %1 <= %2 %3 %4 %5" \
+ : inline_syscall_r0_out_constraint (_sc_0), \
+ "=r"(_sc_19), "=r"(_sc_16), "=r"(_sc_17), \
+ "=r"(_sc_18) \
+ : "0"(_sc_0), "2"(_sc_16), "3"(_sc_17), \
+ "4"(_sc_18) \
+ : inline_syscall_clobbers, "$20", "$21"); \
_sc_ret = _sc_0, _sc_err = _sc_19; \
}
@@ -273,13 +277,14 @@ $syscall_error: \
_sc_17 = (long) (arg2); \
_sc_18 = (long) (arg3); \
_sc_19 = (long) (arg4); \
- __asm__("callsys # %0 %1 <= %2 %3 %4 %5 %6" \
- : inline_syscall_r0_out_constraint (_sc_0), \
- "=r"(_sc_19), "=r"(_sc_16), "=r"(_sc_17), \
- "=r"(_sc_18) \
- : "0"(_sc_0), "2"(_sc_16), "3"(_sc_17), \
- "4"(_sc_18), "1"(_sc_19) \
- : inline_syscall_clobbers, "$20", "$21"); \
+ __asm__ __volatile__ \
+ ("callsys # %0 %1 <= %2 %3 %4 %5 %6" \
+ : inline_syscall_r0_out_constraint (_sc_0), \
+ "=r"(_sc_19), "=r"(_sc_16), "=r"(_sc_17), \
+ "=r"(_sc_18) \
+ : "0"(_sc_0), "2"(_sc_16), "3"(_sc_17), \
+ "4"(_sc_18), "1"(_sc_19) \
+ : inline_syscall_clobbers, "$20", "$21"); \
_sc_ret = _sc_0, _sc_err = _sc_19; \
}
@@ -298,13 +303,14 @@ $syscall_error: \
_sc_18 = (long) (arg3); \
_sc_19 = (long) (arg4); \
_sc_20 = (long) (arg5); \
- __asm__("callsys # %0 %1 <= %2 %3 %4 %5 %6 %7" \
- : inline_syscall_r0_out_constraint (_sc_0), \
- "=r"(_sc_19), "=r"(_sc_16), "=r"(_sc_17), \
- "=r"(_sc_18), "=r"(_sc_20) \
- : "0"(_sc_0), "2"(_sc_16), "3"(_sc_17), \
- "4"(_sc_18), "1"(_sc_19), "5"(_sc_20) \
- : inline_syscall_clobbers, "$21"); \
+ __asm__ __volatile__ \
+ ("callsys # %0 %1 <= %2 %3 %4 %5 %6 %7" \
+ : inline_syscall_r0_out_constraint (_sc_0), \
+ "=r"(_sc_19), "=r"(_sc_16), "=r"(_sc_17), \
+ "=r"(_sc_18), "=r"(_sc_20) \
+ : "0"(_sc_0), "2"(_sc_16), "3"(_sc_17), \
+ "4"(_sc_18), "1"(_sc_19), "5"(_sc_20) \
+ : inline_syscall_clobbers, "$21"); \
_sc_ret = _sc_0, _sc_err = _sc_19; \
}
@@ -325,14 +331,14 @@ $syscall_error: \
_sc_19 = (long) (arg4); \
_sc_20 = (long) (arg5); \
_sc_21 = (long) (arg6); \
- __asm__("callsys # %0 %1 <= %2 %3 %4 %5 %6 %7 %8" \
- : inline_syscall_r0_out_constraint (_sc_0), \
- "=r"(_sc_19) "=r"(_sc_16), "=r"(_sc_17), \
- "=r"(_sc_18), "=r"(_sc_20), "=r"(_sc_21) \
- : "0"(_sc_0), "2"(_sc_16), "3"(_sc_17), \
- "4"(_sc_18), "1"(_sc_19), "5"(_sc_20), \
- "6"(_sc_21) \
- : inline_syscall_clobbers); \
+ __asm__ __volatile__ \
+ ("callsys # %0 %1 <= %2 %3 %4 %5 %6 %7 %8" \
+ : inline_syscall_r0_out_constraint (_sc_0), \
+ "=r"(_sc_19) "=r"(_sc_16), "=r"(_sc_17), \
+ "=r"(_sc_18), "=r"(_sc_20), "=r"(_sc_21) \
+ : "0"(_sc_0), "2"(_sc_16), "3"(_sc_17), "4"(_sc_18), \
+ "1"(_sc_19), "5"(_sc_20), "6"(_sc_21) \
+ : inline_syscall_clobbers); \
_sc_ret = _sc_0, _sc_err = _sc_19; \
}
--- libc/sysdeps/unix/sysv/linux/alpha/sysdep.h.jj 2003-01-13 13:57:42.000000000 +0100
+++ libc/sysdeps/unix/sysv/linux/alpha/sysdep.h 2003-01-21 21:05:10.000000000 +0100
@@ -75,7 +75,8 @@
#undef INTERNAL_SYSCALL
#define INTERNAL_SYSCALL(name, err_out, nr, args...) \
({ \
- extern char ChEcK[__NR_##name == __NR_rt_sigaction ? -1 : 1]; \
+ extern char ChEcK[__NR_##name == __NR_rt_sigaction ? -1 : 1] \
+ __attribute__((unused)); \
INTERNAL_SYSCALL1(name, err_out, nr, args); \
})
Jakub
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