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xtensa: clean up xtensa/kernel/ptrace.c
- make locally-used functions static; - drop meaningless comments and commented out code; - fix code style and alignment. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
This commit is contained in:
Max Filippov
parent
d9c7710db9
commit
1b47a683a0
@ -1,4 +1,3 @@
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// TODO some minor issues
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/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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@ -24,13 +23,13 @@
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#include <linux/security.h>
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#include <linux/signal.h>
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#include <linux/smp.h>
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#include <linux/uaccess.h>
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#include <asm/coprocessor.h>
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#include <asm/elf.h>
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#include <asm/page.h>
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#include <asm/pgtable.h>
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#include <asm/ptrace.h>
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#include <linux/uaccess.h>
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void user_enable_single_step(struct task_struct *child)
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@ -52,7 +51,7 @@ void ptrace_disable(struct task_struct *child)
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/* Nothing to do.. */
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}
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int ptrace_getregs(struct task_struct *child, void __user *uregs)
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static int ptrace_getregs(struct task_struct *child, void __user *uregs)
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{
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struct pt_regs *regs = task_pt_regs(child);
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xtensa_gregset_t __user *gregset = uregs;
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@ -73,12 +72,12 @@ int ptrace_getregs(struct task_struct *child, void __user *uregs)
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for (i = 0; i < XCHAL_NUM_AREGS; i++)
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__put_user(regs->areg[i],
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gregset->a + ((wb * 4 + i) % XCHAL_NUM_AREGS));
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gregset->a + ((wb * 4 + i) % XCHAL_NUM_AREGS));
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return 0;
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}
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int ptrace_setregs(struct task_struct *child, void __user *uregs)
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static int ptrace_setregs(struct task_struct *child, void __user *uregs)
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{
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struct pt_regs *regs = task_pt_regs(child);
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xtensa_gregset_t *gregset = uregs;
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@ -107,7 +106,7 @@ int ptrace_setregs(struct task_struct *child, void __user *uregs)
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unsigned long rotws, wmask;
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rotws = (((ws | (ws << WSBITS)) >> wb) &
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((1 << WSBITS) - 1)) & ~1;
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((1 << WSBITS) - 1)) & ~1;
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wmask = ((rotws ? WSBITS + 1 - ffs(rotws) : 0) << 4) |
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(rotws & 0xF) | 1;
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regs->windowbase = wb;
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@ -115,19 +114,19 @@ int ptrace_setregs(struct task_struct *child, void __user *uregs)
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regs->wmask = wmask;
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}
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if (wb != 0 && __copy_from_user(regs->areg + XCHAL_NUM_AREGS - wb * 4,
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gregset->a, wb * 16))
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if (wb != 0 && __copy_from_user(regs->areg + XCHAL_NUM_AREGS - wb * 4,
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gregset->a, wb * 16))
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return -EFAULT;
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if (__copy_from_user(regs->areg, gregset->a + wb * 4,
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(WSBITS - wb) * 16))
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(WSBITS - wb) * 16))
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return -EFAULT;
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return 0;
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}
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int ptrace_getxregs(struct task_struct *child, void __user *uregs)
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static int ptrace_getxregs(struct task_struct *child, void __user *uregs)
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{
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struct pt_regs *regs = task_pt_regs(child);
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struct thread_info *ti = task_thread_info(child);
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@ -151,7 +150,7 @@ int ptrace_getxregs(struct task_struct *child, void __user *uregs)
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return ret ? -EFAULT : 0;
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}
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int ptrace_setxregs(struct task_struct *child, void __user *uregs)
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static int ptrace_setxregs(struct task_struct *child, void __user *uregs)
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{
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struct thread_info *ti = task_thread_info(child);
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struct pt_regs *regs = task_pt_regs(child);
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@ -177,7 +176,8 @@ int ptrace_setxregs(struct task_struct *child, void __user *uregs)
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return ret ? -EFAULT : 0;
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}
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int ptrace_peekusr(struct task_struct *child, long regno, long __user *ret)
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static int ptrace_peekusr(struct task_struct *child, long regno,
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long __user *ret)
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{
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struct pt_regs *regs;
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unsigned long tmp;
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@ -186,86 +186,87 @@ int ptrace_peekusr(struct task_struct *child, long regno, long __user *ret)
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tmp = 0; /* Default return value. */
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switch(regno) {
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case REG_AR_BASE ... REG_AR_BASE + XCHAL_NUM_AREGS - 1:
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tmp = regs->areg[regno - REG_AR_BASE];
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break;
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case REG_AR_BASE ... REG_AR_BASE + XCHAL_NUM_AREGS - 1:
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tmp = regs->areg[regno - REG_AR_BASE];
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break;
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case REG_A_BASE ... REG_A_BASE + 15:
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tmp = regs->areg[regno - REG_A_BASE];
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break;
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case REG_A_BASE ... REG_A_BASE + 15:
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tmp = regs->areg[regno - REG_A_BASE];
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break;
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case REG_PC:
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tmp = regs->pc;
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break;
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case REG_PC:
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tmp = regs->pc;
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break;
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case REG_PS:
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/* Note: PS.EXCM is not set while user task is running;
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* its being set in regs is for exception handling
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* convenience.
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*/
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tmp = (regs->ps & ~(1 << PS_EXCM_BIT));
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break;
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case REG_PS:
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/* Note: PS.EXCM is not set while user task is running;
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* its being set in regs is for exception handling
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* convenience. */
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tmp = (regs->ps & ~(1 << PS_EXCM_BIT));
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break;
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case REG_WB:
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break; /* tmp = 0 */
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case REG_WB:
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break; /* tmp = 0 */
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case REG_WS:
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case REG_WS:
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{
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unsigned long wb = regs->windowbase;
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unsigned long ws = regs->windowstart;
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tmp = ((ws>>wb) | (ws<<(WSBITS-wb))) & ((1<<WSBITS)-1);
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tmp = ((ws >> wb) | (ws << (WSBITS - wb))) &
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((1 << WSBITS) - 1);
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break;
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}
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case REG_LBEG:
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tmp = regs->lbeg;
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break;
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case REG_LBEG:
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tmp = regs->lbeg;
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break;
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case REG_LEND:
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tmp = regs->lend;
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break;
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case REG_LEND:
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tmp = regs->lend;
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break;
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case REG_LCOUNT:
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tmp = regs->lcount;
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break;
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case REG_LCOUNT:
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tmp = regs->lcount;
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break;
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case REG_SAR:
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tmp = regs->sar;
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break;
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case REG_SAR:
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tmp = regs->sar;
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break;
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case SYSCALL_NR:
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tmp = regs->syscall;
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break;
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case SYSCALL_NR:
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tmp = regs->syscall;
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break;
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default:
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return -EIO;
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default:
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return -EIO;
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}
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return put_user(tmp, ret);
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}
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int ptrace_pokeusr(struct task_struct *child, long regno, long val)
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static int ptrace_pokeusr(struct task_struct *child, long regno, long val)
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{
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struct pt_regs *regs;
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regs = task_pt_regs(child);
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switch (regno) {
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case REG_AR_BASE ... REG_AR_BASE + XCHAL_NUM_AREGS - 1:
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regs->areg[regno - REG_AR_BASE] = val;
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break;
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case REG_AR_BASE ... REG_AR_BASE + XCHAL_NUM_AREGS - 1:
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regs->areg[regno - REG_AR_BASE] = val;
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break;
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case REG_A_BASE ... REG_A_BASE + 15:
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regs->areg[regno - REG_A_BASE] = val;
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break;
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case REG_A_BASE ... REG_A_BASE + 15:
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regs->areg[regno - REG_A_BASE] = val;
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break;
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case REG_PC:
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regs->pc = val;
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break;
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case REG_PC:
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regs->pc = val;
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break;
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case SYSCALL_NR:
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regs->syscall = val;
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break;
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case SYSCALL_NR:
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regs->syscall = val;
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break;
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default:
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return -EIO;
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default:
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return -EIO;
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}
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return 0;
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}
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@ -473,7 +474,8 @@ void do_syscall_trace(void)
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* The 0x80 provides a way for the tracing parent to distinguish
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* between a syscall stop and SIGTRAP delivery
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*/
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ptrace_notify(SIGTRAP|((current->ptrace & PT_TRACESYSGOOD) ? 0x80 : 0));
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ptrace_notify(SIGTRAP |
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((current->ptrace & PT_TRACESYSGOOD) ? 0x80 : 0));
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/*
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* this isn't the same as continuing with a signal, but it will do
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@ -488,18 +490,14 @@ void do_syscall_trace(void)
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void do_syscall_trace_enter(struct pt_regs *regs)
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{
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if (test_thread_flag(TIF_SYSCALL_TRACE)
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&& (current->ptrace & PT_PTRACED))
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if (test_thread_flag(TIF_SYSCALL_TRACE) &&
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(current->ptrace & PT_PTRACED))
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do_syscall_trace();
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#if 0
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audit_syscall_entry(...);
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#endif
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}
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void do_syscall_trace_leave(struct pt_regs *regs)
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{
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if ((test_thread_flag(TIF_SYSCALL_TRACE))
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&& (current->ptrace & PT_PTRACED))
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if (test_thread_flag(TIF_SYSCALL_TRACE) &&
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(current->ptrace & PT_PTRACED))
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do_syscall_trace();
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}
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