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risc-v/vfork: Save FPU registers 

Save the callee saved FPU registers
This commit is contained in:
Ville Juven 2022-05-19 12:21:18 +03:00 committed by Alan Carvalho de Assis
parent ef42b7c31e
commit 1ec70bc704
2 changed files with 45 additions and 16 deletions
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44
arch/risc-v/src/common/riscv_vfork.c
View File

@ -206,25 +206,39 @@ pid_t up_vfork(const struct vfork_s *context)
* indication to the newly started child thread.
*/
child->cmn.xcp.regs[REG_S1] = context->s1; /* Saved register s1 */
child->cmn.xcp.regs[REG_S2] = context->s2; /* Saved register s2 */
child->cmn.xcp.regs[REG_S3] = context->s3; /* Saved register s3 */
child->cmn.xcp.regs[REG_S4] = context->s4; /* Saved register s4 */
child->cmn.xcp.regs[REG_S5] = context->s5; /* Saved register s5 */
child->cmn.xcp.regs[REG_S6] = context->s6; /* Saved register s6 */
child->cmn.xcp.regs[REG_S7] = context->s7; /* Saved register s7 */
child->cmn.xcp.regs[REG_S8] = context->s8; /* Saved register s8 */
child->cmn.xcp.regs[REG_S9] = context->s9; /* Saved register s9 */
child->cmn.xcp.regs[REG_S10] = context->s10; /* Saved register s10 */
child->cmn.xcp.regs[REG_S11] = context->s11; /* Saved register s11 */
child->cmn.xcp.regs[REG_S1] = context->s1; /* Saved register s1 */
child->cmn.xcp.regs[REG_S2] = context->s2; /* Saved register s2 */
child->cmn.xcp.regs[REG_S3] = context->s3; /* Saved register s3 */
child->cmn.xcp.regs[REG_S4] = context->s4; /* Saved register s4 */
child->cmn.xcp.regs[REG_S5] = context->s5; /* Saved register s5 */
child->cmn.xcp.regs[REG_S6] = context->s6; /* Saved register s6 */
child->cmn.xcp.regs[REG_S7] = context->s7; /* Saved register s7 */
child->cmn.xcp.regs[REG_S8] = context->s8; /* Saved register s8 */
child->cmn.xcp.regs[REG_S9] = context->s9; /* Saved register s9 */
child->cmn.xcp.regs[REG_S10] = context->s10; /* Saved register s10 */
child->cmn.xcp.regs[REG_S11] = context->s11; /* Saved register s11 */
#ifdef CONFIG_RISCV_FRAMEPOINTER
child->cmn.xcp.regs[REG_FP] = newfp; /* Frame pointer */
child->cmn.xcp.regs[REG_FP] = newfp; /* Frame pointer */
#else
child->cmn.xcp.regs[REG_S0] = context->s0; /* Saved register s0 */
child->cmn.xcp.regs[REG_S0] = context->s0; /* Saved register s0 */
#endif
child->cmn.xcp.regs[REG_SP] = newsp; /* Stack pointer */
child->cmn.xcp.regs[REG_SP] = newsp; /* Stack pointer */
#ifdef RISCV_SAVE_GP
child->cmn.xcp.regs[REG_GP] = newsp; /* Global pointer */
child->cmn.xcp.regs[REG_GP] = newsp; /* Global pointer */
#endif
#ifdef CONFIG_ARCH_FPU
child->cmn.xcp.regs[REG_FS0] = context->fs0; /* Saved register fs1 */
child->cmn.xcp.regs[REG_FS1] = context->fs1; /* Saved register fs1 */
child->cmn.xcp.regs[REG_FS2] = context->fs2; /* Saved register fs2 */
child->cmn.xcp.regs[REG_FS3] = context->fs3; /* Saved register fs3 */
child->cmn.xcp.regs[REG_FS4] = context->fs4; /* Saved register fs4 */
child->cmn.xcp.regs[REG_FS5] = context->fs5; /* Saved register fs5 */
child->cmn.xcp.regs[REG_FS6] = context->fs6; /* Saved register fs6 */
child->cmn.xcp.regs[REG_FS7] = context->fs7; /* Saved register fs7 */
child->cmn.xcp.regs[REG_FS8] = context->fs8; /* Saved register fs8 */
child->cmn.xcp.regs[REG_FS9] = context->fs9; /* Saved register fs9 */
child->cmn.xcp.regs[REG_FS10] = context->fs10; /* Saved register fs10 */
child->cmn.xcp.regs[REG_FS11] = context->fs11; /* Saved register fs11 */
#endif
#ifdef CONFIG_LIB_SYSCALL

17
arch/risc-v/src/common/riscv_vfork.h
View File

@ -118,7 +118,22 @@ struct vfork_s
uintptr_t gp; /* Global pointer */
#endif
/* Floating point registers (not yet) */
/* Floating point registers */
#ifdef CONFIG_ARCH_FPU
uintptr_t fs0; /* Saved register fs0 */
uintptr_t fs1; /* Saved register fs1 */
uintptr_t fs2; /* Saved register fs2 */
uintptr_t fs3; /* Saved register fs3 */
uintptr_t fs4; /* Saved register fs4 */
uintptr_t fs5; /* Saved register fs5 */
uintptr_t fs6; /* Saved register fs6 */
uintptr_t fs7; /* Saved register fs7 */
uintptr_t fs8; /* Saved register fs8 */
uintptr_t fs9; /* Saved register fs9 */
uintptr_t fs10; /* Saved register fs10 */
uintptr_t fs11; /* Saved register fs11 */
#endif
};
#endif