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Subject[PATCH] Fix sparc64 build with CONFIG_COMPAT=n
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Date
Right now sparc64 has achieved the impressive feat of not compiling
with allnoconfig (in fact the very first source file, init/main.c,
won't build).

This is because various structures and so on use types that are only
defined if CONFIG_COMPAT is on, but allnoconfig sets
CONFIG_SPARC32_COMPAT and therefore CONFIG_COMPAT to n. I'm including
two possible solutions: one trivial one that forces
CONFIG_SPARC32_COMPAT to y, and one that actually tries to make the
CONFIG_COMPAT=n case work.

I don't actually have any hardware to try this on since I only
discovered the problem testing my driver for portability by
cross-compiling (I use allnoconfig to make my build as quick as
possible). In fact I'm not sure if anyone has a full 64-bit userspace
for sparc64. Therefore the first patch is probably the best fix, but
I leave it up to the experts.

I'm including the simple fix inline and attaching the big fix.

Thanks,
Roland

Index: linux-2.6.7-sparc64/arch/sparc64/Kconfig
===================================================================
--- linux-2.6.7-sparc64.orig/arch/sparc64/Kconfig 2004-07-08 20:07:28.000000000 -0700
+++ linux-2.6.7-sparc64/arch/sparc64/Kconfig 2004-07-09 20:43:11.000000000 -0700
@@ -348,7 +348,8 @@
module will be called openpromfs. If unsure, choose M.

config SPARC32_COMPAT
- bool "Kernel support for Linux/Sparc 32bit binary compatibility"
+ bool "Kernel support for Linux/Sparc 32bit binary compatibility" if BROKEN
+ default y
help
This allows you to run 32-bit binaries on your Ultra.
Everybody wants this; say Y.

Index: linux-2.6.7-sparc64/arch/sparc64/Kconfig
===================================================================
--- linux-2.6.7-sparc64.orig/arch/sparc64/Kconfig 2004-07-08 20:07:28.000000000 -0700
+++ linux-2.6.7-sparc64/arch/sparc64/Kconfig 2004-07-09 20:00:34.000000000 -0700
@@ -382,6 +382,7 @@

config SUNOS_EMUL
bool "SunOS binary emulation"
+ depends on BINFMT_AOUT32
help
This allows you to run most SunOS binaries. If you want to do this,
say Y here and place appropriate files in /usr/gnemul/sunos. See
@@ -391,7 +392,7 @@

config SOLARIS_EMUL
tristate "Solaris binary emulation (EXPERIMENTAL)"
- depends on EXPERIMENTAL
+ depends on SPARC32_COMPAT && EXPERIMENTAL
help
This is experimental code which will enable you to run (many)
Solaris binaries on your SPARC Linux machine.
Index: linux-2.6.7-sparc64/arch/sparc64/kernel/process.c
===================================================================
--- linux-2.6.7-sparc64.orig/arch/sparc64/kernel/process.c 2004-06-15 22:19:22.000000000 -0700
+++ linux-2.6.7-sparc64/arch/sparc64/kernel/process.c 2004-07-09 19:55:23.000000000 -0700
@@ -588,10 +588,14 @@

clone_flags &= ~CLONE_IDLETASK;

+
+#ifdef CONFIG_SPARC32_COMPAT
if (test_thread_flag(TIF_32BIT)) {
parent_tid_ptr = compat_ptr(regs->u_regs[UREG_I2]);
child_tid_ptr = compat_ptr(regs->u_regs[UREG_I4]);
- } else {
+ } else
+#endif /* CONFIG_SPARC32_COMPAT */
+ {
parent_tid_ptr = (int __user *) regs->u_regs[UREG_I2];
child_tid_ptr = (int __user *) regs->u_regs[UREG_I4];
}
Index: linux-2.6.7-sparc64/include/asm-sparc64/compat.h
===================================================================
--- linux-2.6.7-sparc64.orig/include/asm-sparc64/compat.h 2004-06-15 22:19:37.000000000 -0700
+++ linux-2.6.7-sparc64/include/asm-sparc64/compat.h 2004-07-09 19:50:39.000000000 -0700
@@ -96,6 +96,78 @@
int f_spare[5];
};

+struct __new_sigaction32 {
+ unsigned sa_handler;
+ unsigned int sa_flags;
+ unsigned sa_restorer; /* not used by Linux/SPARC yet */
+ compat_sigset_t sa_mask;
+};
+
+struct __old_sigaction32 {
+ unsigned sa_handler;
+ compat_old_sigset_t sa_mask;
+ unsigned int sa_flags;
+ unsigned sa_restorer; /* not used by Linux/SPARC yet */
+};
+
+typedef struct sigaltstack32 {
+ u32 ss_sp;
+ int ss_flags;
+ compat_size_t ss_size;
+} stack_t32;
+
+typedef struct siginfo32 {
+ int si_signo;
+ int si_errno;
+ int si_code;
+
+ union {
+ int _pad[SI_PAD_SIZE32];
+
+ /* kill() */
+ struct {
+ compat_pid_t _pid; /* sender's pid */
+ unsigned int _uid; /* sender's uid */
+ } _kill;
+
+ /* POSIX.1b timers */
+ struct {
+ timer_t _tid; /* timer id */
+ int _overrun; /* overrun count */
+ sigval_t32 _sigval; /* same as below */
+ int _sys_private; /* not to be passed to user */
+ } _timer;
+
+ /* POSIX.1b signals */
+ struct {
+ compat_pid_t _pid; /* sender's pid */
+ unsigned int _uid; /* sender's uid */
+ sigval_t32 _sigval;
+ } _rt;
+
+ /* SIGCHLD */
+ struct {
+ compat_pid_t _pid; /* which child */
+ unsigned int _uid; /* sender's uid */
+ int _status; /* exit code */
+ compat_clock_t _utime;
+ compat_clock_t _stime;
+ } _sigchld;
+
+ /* SIGILL, SIGFPE, SIGSEGV, SIGBUS, SIGEMT */
+ struct {
+ u32 _addr; /* faulting insn/memory ref. */
+ int _trapno;
+ } _sigfault;
+
+ /* SIGPOLL */
+ struct {
+ int _band; /* POLL_IN, POLL_OUT, POLL_MSG */
+ int _fd;
+ } _sigpoll;
+ } _sifields;
+} siginfo_t32;
+
#define COMPAT_RLIM_INFINITY 0x7fffffff

typedef u32 compat_old_sigset_t;
Index: linux-2.6.7-sparc64/include/asm-sparc64/siginfo.h
===================================================================
--- linux-2.6.7-sparc64.orig/include/asm-sparc64/siginfo.h 2004-06-15 22:19:43.000000000 -0700
+++ linux-2.6.7-sparc64/include/asm-sparc64/siginfo.h 2004-07-09 19:54:12.000000000 -0700
@@ -21,58 +21,6 @@
u32 sival_ptr;
} sigval_t32;

-typedef struct siginfo32 {
- int si_signo;
- int si_errno;
- int si_code;
-
- union {
- int _pad[SI_PAD_SIZE32];
-
- /* kill() */
- struct {
- compat_pid_t _pid; /* sender's pid */
- unsigned int _uid; /* sender's uid */
- } _kill;
-
- /* POSIX.1b timers */
- struct {
- timer_t _tid; /* timer id */
- int _overrun; /* overrun count */
- sigval_t32 _sigval; /* same as below */
- int _sys_private; /* not to be passed to user */
- } _timer;
-
- /* POSIX.1b signals */
- struct {
- compat_pid_t _pid; /* sender's pid */
- unsigned int _uid; /* sender's uid */
- sigval_t32 _sigval;
- } _rt;
-
- /* SIGCHLD */
- struct {
- compat_pid_t _pid; /* which child */
- unsigned int _uid; /* sender's uid */
- int _status; /* exit code */
- compat_clock_t _utime;
- compat_clock_t _stime;
- } _sigchld;
-
- /* SIGILL, SIGFPE, SIGSEGV, SIGBUS, SIGEMT */
- struct {
- u32 _addr; /* faulting insn/memory ref. */
- int _trapno;
- } _sigfault;
-
- /* SIGPOLL */
- struct {
- int _band; /* POLL_IN, POLL_OUT, POLL_MSG */
- int _fd;
- } _sigpoll;
- } _sifields;
-} siginfo_t32;
-
#endif /* __KERNEL__ */

#define SI_NOINFO 32767 /* no information in siginfo_t */
@@ -85,6 +33,7 @@

#ifdef __KERNEL__

+#ifdef CONFIG_SPARC32_COMPAT
typedef struct sigevent32 {
sigval_t32 sigev_value;
int sigev_signo;
@@ -100,6 +49,7 @@
} sigevent_t32;

extern int copy_siginfo_to_user32(siginfo_t32 __user *to, siginfo_t *from);
+#endif /* CONFIG_SPARC32_COMPAT */

#endif /* __KERNEL__ */

Index: linux-2.6.7-sparc64/include/asm-sparc64/signal.h
===================================================================
--- linux-2.6.7-sparc64.orig/include/asm-sparc64/signal.h 2004-06-15 22:19:02.000000000 -0700
+++ linux-2.6.7-sparc64/include/asm-sparc64/signal.h 2004-07-09 20:24:15.000000000 -0700
@@ -9,6 +9,7 @@
#include <linux/personality.h>
#include <linux/types.h>
#include <linux/compat.h>
+#include <linux/compiler.h> /* For __user */
#endif
#endif

@@ -203,13 +204,6 @@
};

#ifdef __KERNEL__
-struct __new_sigaction32 {
- unsigned sa_handler;
- unsigned int sa_flags;
- unsigned sa_restorer; /* not used by Linux/SPARC yet */
- compat_sigset_t sa_mask;
-};
-
struct k_sigaction {
struct __new_sigaction sa;
void __user *ka_restorer;
@@ -223,15 +217,6 @@
void (*sa_restorer)(void); /* not used by Linux/SPARC yet */
};

-#ifdef __KERNEL__
-struct __old_sigaction32 {
- unsigned sa_handler;
- compat_old_sigset_t sa_mask;
- unsigned int sa_flags;
- unsigned sa_restorer; /* not used by Linux/SPARC yet */
-};
-#endif
-
typedef struct sigaltstack {
void *ss_sp;
int ss_flags;
@@ -239,12 +224,6 @@
} stack_t;

#ifdef __KERNEL__
-typedef struct sigaltstack32 {
- u32 ss_sp;
- int ss_flags;
- compat_size_t ss_size;
-} stack_t32;
-
struct signal_deliver_cookie {
int restart_syscall;
unsigned long orig_i0;
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