ShuriZma
/
xemu
mirror of https://github.com/xemu-project/xemu.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

bsd-user: Implement 'get_mcontext' for RISC-V 

Added the 'get_mcontext' function to extract and populate
the RISC-V machine context from the CPU state.
This function is used to gather the current state of the
general-purpose registers and store it in a 'target_mcontext_'
structure.

Signed-off-by: Mark Corbin <mark@dibsco.co.uk>
Signed-off-by: Ajeet Singh <itachis@FreeBSD.org>
Signed-off-by: Warner Losh <imp@bsdimp.com>
Co-authored-by: Warner Losh <imp@bsdimp.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-ID: <20240916155119.14610-16-itachis@FreeBSD.org>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
This commit is contained in:
Mark Corbin 2024-09-17 01:51:17 +10:00 committed by Alistair Francis
parent 2931709ed9
commit e185844fbd
1 changed files with 53 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

53
bsd-user/riscv/signal.c
View File

@ -61,3 +61,56 @@ abi_long setup_sigframe_arch(CPURISCVState *env, abi_ulong frame_addr,
get_mcontext(env, mcp, flags);
return 0;
}
/*
* Compare with get_mcontext() in riscv/riscv/machdep.c
* Assumes that the memory is locked if mcp points to user memory.
*/
abi_long get_mcontext(CPURISCVState *regs, target_mcontext_t *mcp,
int flags)
{
mcp->mc_gpregs.gp_t[0] = tswap64(regs->gpr[5]);
mcp->mc_gpregs.gp_t[1] = tswap64(regs->gpr[6]);
mcp->mc_gpregs.gp_t[2] = tswap64(regs->gpr[7]);
mcp->mc_gpregs.gp_t[3] = tswap64(regs->gpr[28]);
mcp->mc_gpregs.gp_t[4] = tswap64(regs->gpr[29]);
mcp->mc_gpregs.gp_t[5] = tswap64(regs->gpr[30]);
mcp->mc_gpregs.gp_t[6] = tswap64(regs->gpr[31]);
mcp->mc_gpregs.gp_s[0] = tswap64(regs->gpr[8]);
mcp->mc_gpregs.gp_s[1] = tswap64(regs->gpr[9]);
mcp->mc_gpregs.gp_s[2] = tswap64(regs->gpr[18]);
mcp->mc_gpregs.gp_s[3] = tswap64(regs->gpr[19]);
mcp->mc_gpregs.gp_s[4] = tswap64(regs->gpr[20]);
mcp->mc_gpregs.gp_s[5] = tswap64(regs->gpr[21]);
mcp->mc_gpregs.gp_s[6] = tswap64(regs->gpr[22]);
mcp->mc_gpregs.gp_s[7] = tswap64(regs->gpr[23]);
mcp->mc_gpregs.gp_s[8] = tswap64(regs->gpr[24]);
mcp->mc_gpregs.gp_s[9] = tswap64(regs->gpr[25]);
mcp->mc_gpregs.gp_s[10] = tswap64(regs->gpr[26]);
mcp->mc_gpregs.gp_s[11] = tswap64(regs->gpr[27]);
mcp->mc_gpregs.gp_a[0] = tswap64(regs->gpr[10]);
mcp->mc_gpregs.gp_a[1] = tswap64(regs->gpr[11]);
mcp->mc_gpregs.gp_a[2] = tswap64(regs->gpr[12]);
mcp->mc_gpregs.gp_a[3] = tswap64(regs->gpr[13]);
mcp->mc_gpregs.gp_a[4] = tswap64(regs->gpr[14]);
mcp->mc_gpregs.gp_a[5] = tswap64(regs->gpr[15]);
mcp->mc_gpregs.gp_a[6] = tswap64(regs->gpr[16]);
mcp->mc_gpregs.gp_a[7] = tswap64(regs->gpr[17]);
if (flags & TARGET_MC_GET_CLEAR_RET) {
mcp->mc_gpregs.gp_a[0] = 0; /* a0 */
mcp->mc_gpregs.gp_a[1] = 0; /* a1 */
mcp->mc_gpregs.gp_t[0] = 0; /* clear syscall error */
}
mcp->mc_gpregs.gp_ra = tswap64(regs->gpr[1]);
mcp->mc_gpregs.gp_sp = tswap64(regs->gpr[2]);
mcp->mc_gpregs.gp_gp = tswap64(regs->gpr[3]);
mcp->mc_gpregs.gp_tp = tswap64(regs->gpr[4]);
mcp->mc_gpregs.gp_sepc = tswap64(regs->pc);
return 0;
}