arch/tile: avoid ISO namespace pollution with <asm/sigcontext.h>
<asm/sigcontext.h> is used by glibc's <bits/sigcontext.h> from <signal.h>,
which means that it can't clutter the namespace with random symbols
or #defines. However, we use <arch/abi.h> to get a suitable type to
hold a machine register.
This change makes <arch/abi.h> safe to use in this kind of context
if __need_int_reg_t is defined prior to including the file; in that
case, it only defines a few symbols that are safe in the ISO namespace
(prefixed with double underscores). <asm/sigcontext.h> then uses
the __uint_reg_t type instead of the normal uint_reg_t.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
diff --git a/arch/tile/include/asm/sigcontext.h b/arch/tile/include/asm/sigcontext.h
index 5e2d033..6348e59 100644
--- a/arch/tile/include/asm/sigcontext.h
+++ b/arch/tile/include/asm/sigcontext.h
@@ -15,6 +15,8 @@
#ifndef _ASM_TILE_SIGCONTEXT_H
#define _ASM_TILE_SIGCONTEXT_H
+/* Don't pollute the namespace since <signal.h> includes this file. */
+#define __need_int_reg_t
#include <arch/abi.h>
/*
@@ -22,14 +24,14 @@
* but is simplified since we know the fault is from userspace.
*/
struct sigcontext {
- uint_reg_t gregs[53]; /* General-purpose registers. */
- uint_reg_t tp; /* Aliases gregs[TREG_TP]. */
- uint_reg_t sp; /* Aliases gregs[TREG_SP]. */
- uint_reg_t lr; /* Aliases gregs[TREG_LR]. */
- uint_reg_t pc; /* Program counter. */
- uint_reg_t ics; /* In Interrupt Critical Section? */
- uint_reg_t faultnum; /* Fault number. */
- uint_reg_t pad[5];
+ __uint_reg_t gregs[53]; /* General-purpose registers. */
+ __uint_reg_t tp; /* Aliases gregs[TREG_TP]. */
+ __uint_reg_t sp; /* Aliases gregs[TREG_SP]. */
+ __uint_reg_t lr; /* Aliases gregs[TREG_LR]. */
+ __uint_reg_t pc; /* Program counter. */
+ __uint_reg_t ics; /* In Interrupt Critical Section? */
+ __uint_reg_t faultnum; /* Fault number. */
+ __uint_reg_t pad[5];
};
#endif /* _ASM_TILE_SIGCONTEXT_H */