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Redo RM9000 workaround which along with other DSP ASE changes was

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causing some headache for debuggers knowing about signal frames.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Ralf Baechle
2005-06-15 13:00:12 +00:00
parent aac8aa7717
commit 02416dcf5a
9 changed files with 99 additions and 87 deletions
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32
arch/mips/kernel/signal_n32.c
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@@ -15,6 +15,8 @@
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <linux/cache.h>
#include <linux/sched.h>
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/smp.h>
@@ -36,6 +38,7 @@
#include <asm/system.h>
#include <asm/fpu.h>
#include <asm/cpu-features.h>
#include <asm/war.h>
#include "signal-common.h"
@@ -62,17 +65,18 @@ struct ucontextn32 {
sigset_t uc_sigmask; /* mask last for extensibility */
};
#if PLAT_TRAMPOLINE_STUFF_LINE
#define __tramp __attribute__((aligned(PLAT_TRAMPOLINE_STUFF_LINE)))
#else
#define __tramp
#endif
struct rt_sigframe_n32 {
u32 rs_ass[4]; /* argument save space for o32 */
u32 rs_code[2] __tramp; /* signal trampoline */
struct siginfo rs_info __tramp;
#if ICACHE_REFILLS_WORKAROUND_WAR
u32 rs_pad[2];
#else
u32 rs_code[2]; /* signal trampoline */
#endif
struct siginfo rs_info;
struct ucontextn32 rs_uc;
#if ICACHE_REFILLS_WORKAROUND_WAR
u32 rs_code[8] ____cacheline_aligned; /* signal trampoline */
#endif
};
save_static_function(sysn32_rt_sigreturn);
@@ -137,17 +141,7 @@ void setup_rt_frame_n32(struct k_sigaction * ka,
if (!access_ok(VERIFY_WRITE, frame, sizeof (*frame)))
goto give_sigsegv;
/*
* Set up the return code ...
*
* li v0, __NR_rt_sigreturn
* syscall
*/
if (PLAT_TRAMPOLINE_STUFF_LINE)
__clear_user(frame->rs_code, PLAT_TRAMPOLINE_STUFF_LINE);
err |= __put_user(0x24020000 + __NR_N32_rt_sigreturn, frame->rs_code + 0);
err |= __put_user(0x0000000c , frame->rs_code + 1);
flush_cache_sigtramp((unsigned long) frame->rs_code);
install_sigtramp(frame->rs_code, __NR_N32_rt_sigreturn);
/* Create siginfo. */
err |= copy_siginfo_to_user(&frame->rs_info, info);