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arm: remove unused restart trampoline

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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
2012-05-02 21:13:45 -04:00
parent 6b5c8045ec
commit fa18484d09
3 changed files with 0 additions and 17 deletions
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13
arch/arm/kernel/signal.c
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@@ -29,7 +29,6 @@
*/ */
#define SWI_SYS_SIGRETURN (0xef000000|(__NR_sigreturn)|(__NR_OABI_SYSCALL_BASE)) #define SWI_SYS_SIGRETURN (0xef000000|(__NR_sigreturn)|(__NR_OABI_SYSCALL_BASE))
#define SWI_SYS_RT_SIGRETURN (0xef000000|(__NR_rt_sigreturn)|(__NR_OABI_SYSCALL_BASE)) #define SWI_SYS_RT_SIGRETURN (0xef000000|(__NR_rt_sigreturn)|(__NR_OABI_SYSCALL_BASE))
#define SWI_SYS_RESTART (0xef000000|__NR_restart_syscall|__NR_OABI_SYSCALL_BASE)
/* /*
* With EABI, the syscall number has to be loaded into r7. * With EABI, the syscall number has to be loaded into r7.
@@ -49,18 +48,6 @@ const unsigned long sigreturn_codes[7] = {
MOV_R7_NR_RT_SIGRETURN, SWI_SYS_RT_SIGRETURN, SWI_THUMB_RT_SIGRETURN, MOV_R7_NR_RT_SIGRETURN, SWI_SYS_RT_SIGRETURN, SWI_THUMB_RT_SIGRETURN,
}; };
/*
* Either we support OABI only, or we have EABI with the OABI
* compat layer enabled. In the later case we don't know if
* user space is EABI or not, and if not we must not clobber r7.
* Always using the OABI syscall solves that issue and works for
* all those cases.
*/
const unsigned long syscall_restart_code[2] = {
SWI_SYS_RESTART, /* swi __NR_restart_syscall */
0xe49df004, /* ldr pc, [sp], #4 */
};
/* /*
* atomically swap in the new signal mask, and wait for a signal. * atomically swap in the new signal mask, and wait for a signal.
*/ */

2
arch/arm/kernel/signal.h
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@@ -8,7 +8,5 @@
* published by the Free Software Foundation. * published by the Free Software Foundation.
*/ */
#define KERN_SIGRETURN_CODE (CONFIG_VECTORS_BASE + 0x00000500) #define KERN_SIGRETURN_CODE (CONFIG_VECTORS_BASE + 0x00000500)
#define KERN_RESTART_CODE (KERN_SIGRETURN_CODE + sizeof(sigreturn_codes))
extern const unsigned long sigreturn_codes[7]; extern const unsigned long sigreturn_codes[7];
extern const unsigned long syscall_restart_code[2];

2
arch/arm/kernel/traps.c
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@@ -819,8 +819,6 @@ void __init early_trap_init(void *vectors_base)
*/ */
memcpy((void *)(vectors + KERN_SIGRETURN_CODE - CONFIG_VECTORS_BASE), memcpy((void *)(vectors + KERN_SIGRETURN_CODE - CONFIG_VECTORS_BASE),
sigreturn_codes, sizeof(sigreturn_codes)); sigreturn_codes, sizeof(sigreturn_codes));
memcpy((void *)(vectors + KERN_RESTART_CODE - CONFIG_VECTORS_BASE),
syscall_restart_code, sizeof(syscall_restart_code));
flush_icache_range(vectors, vectors + PAGE_SIZE); flush_icache_range(vectors, vectors + PAGE_SIZE);
modify_domain(DOMAIN_USER, DOMAIN_CLIENT); modify_domain(DOMAIN_USER, DOMAIN_CLIENT);