diff options
Diffstat (limited to 'arch/xtensa/kernel/ptrace.c')
| -rw-r--r-- | arch/xtensa/kernel/ptrace.c | 45 |
1 files changed, 27 insertions, 18 deletions
diff --git a/arch/xtensa/kernel/ptrace.c b/arch/xtensa/kernel/ptrace.c index c72c9473ef9..562fac66475 100644 --- a/arch/xtensa/kernel/ptrace.c +++ b/arch/xtensa/kernel/ptrace.c @@ -24,7 +24,6 @@ #include <asm/pgtable.h> #include <asm/page.h> -#include <asm/system.h> #include <asm/uaccess.h> #include <asm/ptrace.h> #include <asm/elf.h> @@ -54,9 +53,8 @@ int ptrace_getregs(struct task_struct *child, void __user *uregs) { struct pt_regs *regs = task_pt_regs(child); xtensa_gregset_t __user *gregset = uregs; - unsigned long wm = regs->wmask; unsigned long wb = regs->windowbase; - int live, i; + int i; if (!access_ok(VERIFY_WRITE, uregs, sizeof(xtensa_gregset_t))) return -EIO; @@ -68,13 +66,11 @@ int ptrace_getregs(struct task_struct *child, void __user *uregs) __put_user(regs->lcount, &gregset->lcount); __put_user(regs->windowstart, &gregset->windowstart); __put_user(regs->windowbase, &gregset->windowbase); + __put_user(regs->threadptr, &gregset->threadptr); - live = (wm & 2) ? 4 : (wm & 4) ? 8 : (wm & 8) ? 12 : 16; - - for (i = 0; i < live; i++) - __put_user(regs->areg[i],gregset->a+((wb*4+i)%XCHAL_NUM_AREGS)); - for (i = XCHAL_NUM_AREGS - (wm >> 4) * 4; i < XCHAL_NUM_AREGS; i++) - __put_user(regs->areg[i],gregset->a+((wb*4+i)%XCHAL_NUM_AREGS)); + for (i = 0; i < XCHAL_NUM_AREGS; i++) + __put_user(regs->areg[i], + gregset->a + ((wb * 4 + i) % XCHAL_NUM_AREGS)); return 0; } @@ -85,7 +81,7 @@ int ptrace_setregs(struct task_struct *child, void __user *uregs) xtensa_gregset_t *gregset = uregs; const unsigned long ps_mask = PS_CALLINC_MASK | PS_OWB_MASK; unsigned long ps; - unsigned long wb; + unsigned long wb, ws; if (!access_ok(VERIFY_WRITE, uregs, sizeof(xtensa_gregset_t))) return -EIO; @@ -95,21 +91,33 @@ int ptrace_setregs(struct task_struct *child, void __user *uregs) __get_user(regs->lbeg, &gregset->lbeg); __get_user(regs->lend, &gregset->lend); __get_user(regs->lcount, &gregset->lcount); - __get_user(regs->windowstart, &gregset->windowstart); + __get_user(ws, &gregset->windowstart); __get_user(wb, &gregset->windowbase); + __get_user(regs->threadptr, &gregset->threadptr); regs->ps = (regs->ps & ~ps_mask) | (ps & ps_mask) | (1 << PS_EXCM_BIT); if (wb >= XCHAL_NUM_AREGS / 4) return -EFAULT; - regs->windowbase = wb; + if (wb != regs->windowbase || ws != regs->windowstart) { + unsigned long rotws, wmask; + + rotws = (((ws | (ws << WSBITS)) >> wb) & + ((1 << WSBITS) - 1)) & ~1; + wmask = ((rotws ? WSBITS + 1 - ffs(rotws) : 0) << 4) | + (rotws & 0xF) | 1; + regs->windowbase = wb; + regs->windowstart = ws; + regs->wmask = wmask; + } if (wb != 0 && __copy_from_user(regs->areg + XCHAL_NUM_AREGS - wb * 4, - gregset->a, wb * 16)) + gregset->a, wb * 16)) return -EFAULT; - if (__copy_from_user(regs->areg, gregset->a + wb*4, (WSBITS-wb) * 16)) + if (__copy_from_user(regs->areg, gregset->a + wb * 4, + (WSBITS - wb) * 16)) return -EFAULT; return 0; @@ -147,12 +155,15 @@ int ptrace_setxregs(struct task_struct *child, void __user *uregs) elf_xtregs_t *xtregs = uregs; int ret = 0; + if (!access_ok(VERIFY_READ, uregs, sizeof(elf_xtregs_t))) + return -EFAULT; + #if XTENSA_HAVE_COPROCESSORS /* Flush all coprocessors before we overwrite them. */ coprocessor_flush_all(ti); coprocessor_release_all(ti); - ret |= __copy_from_user(&ti->xtregs_cp, &xtregs->cp0, + ret |= __copy_from_user(&ti->xtregs_cp, &xtregs->cp0, sizeof(xtregs_coprocessor_t)); #endif ret |= __copy_from_user(®s->xtregs_opt, &xtregs->opt, @@ -331,8 +342,7 @@ void do_syscall_trace_enter(struct pt_regs *regs) do_syscall_trace(); #if 0 - if (unlikely(current->audit_context)) - audit_syscall_entry(current, AUDIT_ARCH_XTENSA..); + audit_syscall_entry(current, AUDIT_ARCH_XTENSA..); #endif } @@ -342,4 +352,3 @@ void do_syscall_trace_leave(struct pt_regs *regs) && (current->ptrace & PT_PTRACED)) do_syscall_trace(); } - |