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bsd-user: Implement set_mcontext and get_ucontext_sigreturn for RISCV
Added implementations for 'set_mcontext' and 'get_ucontext_sigreturn' functions for RISC-V architecture, Both functions ensure that the CPU state and user context are properly managed. Signed-off-by: Mark Corbin <mark@dibsco.co.uk> Signed-off-by: Warner Losh <imp@bsdimp.com> Signed-off-by: Ajeet Singh <itachis@FreeBSD.org> Co-authored-by: Warner Losh <imp@bsdimp.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-ID: <20240916155119.14610-17-itachis@FreeBSD.org> Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
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@ -114,3 +114,57 @@ abi_long get_mcontext(CPURISCVState *regs, target_mcontext_t *mcp,
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return 0;
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}
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/* Compare with set_mcontext() in riscv/riscv/exec_machdep.c */
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abi_long set_mcontext(CPURISCVState *regs, target_mcontext_t *mcp,
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int srflag)
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{
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regs->gpr[5] = tswap64(mcp->mc_gpregs.gp_t[0]);
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regs->gpr[6] = tswap64(mcp->mc_gpregs.gp_t[1]);
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regs->gpr[7] = tswap64(mcp->mc_gpregs.gp_t[2]);
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regs->gpr[28] = tswap64(mcp->mc_gpregs.gp_t[3]);
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regs->gpr[29] = tswap64(mcp->mc_gpregs.gp_t[4]);
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regs->gpr[30] = tswap64(mcp->mc_gpregs.gp_t[5]);
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regs->gpr[31] = tswap64(mcp->mc_gpregs.gp_t[6]);
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regs->gpr[8] = tswap64(mcp->mc_gpregs.gp_s[0]);
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regs->gpr[9] = tswap64(mcp->mc_gpregs.gp_s[1]);
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regs->gpr[18] = tswap64(mcp->mc_gpregs.gp_s[2]);
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regs->gpr[19] = tswap64(mcp->mc_gpregs.gp_s[3]);
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regs->gpr[20] = tswap64(mcp->mc_gpregs.gp_s[4]);
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regs->gpr[21] = tswap64(mcp->mc_gpregs.gp_s[5]);
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regs->gpr[22] = tswap64(mcp->mc_gpregs.gp_s[6]);
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regs->gpr[23] = tswap64(mcp->mc_gpregs.gp_s[7]);
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regs->gpr[24] = tswap64(mcp->mc_gpregs.gp_s[8]);
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regs->gpr[25] = tswap64(mcp->mc_gpregs.gp_s[9]);
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regs->gpr[26] = tswap64(mcp->mc_gpregs.gp_s[10]);
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regs->gpr[27] = tswap64(mcp->mc_gpregs.gp_s[11]);
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regs->gpr[10] = tswap64(mcp->mc_gpregs.gp_a[0]);
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regs->gpr[11] = tswap64(mcp->mc_gpregs.gp_a[1]);
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regs->gpr[12] = tswap64(mcp->mc_gpregs.gp_a[2]);
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regs->gpr[13] = tswap64(mcp->mc_gpregs.gp_a[3]);
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regs->gpr[14] = tswap64(mcp->mc_gpregs.gp_a[4]);
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regs->gpr[15] = tswap64(mcp->mc_gpregs.gp_a[5]);
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regs->gpr[16] = tswap64(mcp->mc_gpregs.gp_a[6]);
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regs->gpr[17] = tswap64(mcp->mc_gpregs.gp_a[7]);
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regs->gpr[1] = tswap64(mcp->mc_gpregs.gp_ra);
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regs->gpr[2] = tswap64(mcp->mc_gpregs.gp_sp);
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regs->gpr[3] = tswap64(mcp->mc_gpregs.gp_gp);
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regs->gpr[4] = tswap64(mcp->mc_gpregs.gp_tp);
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regs->pc = tswap64(mcp->mc_gpregs.gp_sepc);
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return 0;
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}
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/* Compare with sys_sigreturn() in riscv/riscv/machdep.c */
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abi_long get_ucontext_sigreturn(CPURISCVState *regs,
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abi_ulong target_sf, abi_ulong *target_uc)
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{
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*target_uc = target_sf;
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return 0;
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}
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