diff options
| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
| commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
| tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /arch/powerpc/kernel/ptrace/ptrace-fpu.c | |
| parent | Initial commit. (diff) | |
| download | linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip | |
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/powerpc/kernel/ptrace/ptrace-fpu.c')
| -rw-r--r-- | arch/powerpc/kernel/ptrace/ptrace-fpu.c | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/ptrace/ptrace-fpu.c b/arch/powerpc/kernel/ptrace/ptrace-fpu.c new file mode 100644 index 000000000..09c49632b --- /dev/null +++ b/arch/powerpc/kernel/ptrace/ptrace-fpu.c @@ -0,0 +1,58 @@ +// SPDX-License-Identifier: GPL-2.0-or-later + +#include <linux/regset.h> + +#include <asm/switch_to.h> + +#include "ptrace-decl.h" + +int ptrace_get_fpr(struct task_struct *child, int index, unsigned long *data) +{ +#ifdef CONFIG_PPC_FPU_REGS + unsigned int fpidx = index - PT_FPR0; +#endif + + if (index > PT_FPSCR) + return -EIO; + +#ifdef CONFIG_PPC_FPU_REGS + flush_fp_to_thread(child); + if (fpidx < (PT_FPSCR - PT_FPR0)) { + if (IS_ENABLED(CONFIG_PPC32)) + // On 32-bit the index we are passed refers to 32-bit words + *data = ((u32 *)child->thread.fp_state.fpr)[fpidx]; + else + memcpy(data, &child->thread.TS_FPR(fpidx), sizeof(long)); + } else + *data = child->thread.fp_state.fpscr; +#else + *data = 0; +#endif + + return 0; +} + +int ptrace_put_fpr(struct task_struct *child, int index, unsigned long data) +{ +#ifdef CONFIG_PPC_FPU_REGS + unsigned int fpidx = index - PT_FPR0; +#endif + + if (index > PT_FPSCR) + return -EIO; + +#ifdef CONFIG_PPC_FPU_REGS + flush_fp_to_thread(child); + if (fpidx < (PT_FPSCR - PT_FPR0)) { + if (IS_ENABLED(CONFIG_PPC32)) + // On 32-bit the index we are passed refers to 32-bit words + ((u32 *)child->thread.fp_state.fpr)[fpidx] = data; + else + memcpy(&child->thread.TS_FPR(fpidx), &data, sizeof(long)); + } else + child->thread.fp_state.fpscr = data; +#endif + + return 0; +} + |