4d90eb97e2
On the same model as ptrace_get_reg() and ptrace_put_reg(), create ptrace_get_fpr() and ptrace_put_fpr() to get/set the floating points registers. We move the boundary checkings in them. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/24a1baedea7f7ae7b6bf27be98bab6d01b5ca2c1.1597770847.git.christophe.leroy@csgroup.eu
41 lines
812 B
C
41 lines
812 B
C
// SPDX-License-Identifier: GPL-2.0-or-later
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#include <linux/regset.h>
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#include <asm/switch_to.h>
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#include "ptrace-decl.h"
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int ptrace_get_fpr(struct task_struct *child, int index, unsigned long *data)
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{
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unsigned int fpidx = index - PT_FPR0;
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if (index > PT_FPSCR)
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return -EIO;
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flush_fp_to_thread(child);
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if (fpidx < (PT_FPSCR - PT_FPR0))
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memcpy(data, &child->thread.TS_FPR(fpidx), sizeof(long));
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else
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*data = child->thread.fp_state.fpscr;
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return 0;
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}
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int ptrace_put_fpr(struct task_struct *child, int index, unsigned long data)
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{
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unsigned int fpidx = index - PT_FPR0;
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if (index > PT_FPSCR)
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return -EIO;
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flush_fp_to_thread(child);
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if (fpidx < (PT_FPSCR - PT_FPR0))
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memcpy(&child->thread.TS_FPR(fpidx), &data, sizeof(long));
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else
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child->thread.fp_state.fpscr = data;
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return 0;
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}
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