diff options
| author | Stacey Son <sson@FreeBSD.org> | 2024-07-08 00:41:25 +0530 |
|---|---|---|
| committer | Warner Losh <imp@bsdimp.com> | 2024-07-23 10:50:54 -0600 |
| commit | 9959fae592b2babddb7c371e27281a4e127a2951 (patch) | |
| tree | bd43fe2d8bd242bded8d79dfc905aa876f89c8bc | |
| parent | 7dba5e10a65be276267f379f07a9643100209c0d (diff) | |
bsd-user:Add get_mcontext function for ARM AArch64
function to retrieve machine context,it populates the provided
target_mcontext_t structure with information from the CPUARMState
registers.
Signed-off-by: Stacey Son <sson@FreeBSD.org>
Signed-off-by: Ajeet Singh <itachis@FreeBSD.org>
Co-authored-by: Kyle Evans <kevans@FreeBSD.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20240707191128.10509-6-itachis@FreeBSD.org>
Signed-off-by: Warner Losh <imp@bsdimp.com>
| -rw-r--r-- | bsd-user/aarch64/signal.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/bsd-user/aarch64/signal.c b/bsd-user/aarch64/signal.c index 98861f9ab3..ab3bf8558a 100644 --- a/bsd-user/aarch64/signal.c +++ b/bsd-user/aarch64/signal.c @@ -51,3 +51,33 @@ abi_long set_sigtramp_args(CPUARMState *regs, int sig, return 0; } + +/* + * Compare to get_mcontext() in arm64/arm64/machdep.c + * Assumes that the memory is locked if mcp points to user memory. + */ +abi_long get_mcontext(CPUARMState *regs, target_mcontext_t *mcp, int flags) +{ + int err = 0, i; + uint64_t *gr = mcp->mc_gpregs.gp_x; + + mcp->mc_gpregs.gp_spsr = pstate_read(regs); + if (flags & TARGET_MC_GET_CLEAR_RET) { + gr[0] = 0UL; + mcp->mc_gpregs.gp_spsr &= ~CPSR_C; + } else { + gr[0] = tswap64(regs->xregs[0]); + } + + for (i = 1; i < 30; i++) { + gr[i] = tswap64(regs->xregs[i]); + } + + mcp->mc_gpregs.gp_sp = tswap64(regs->xregs[TARGET_REG_SP]); + mcp->mc_gpregs.gp_lr = tswap64(regs->xregs[TARGET_REG_LR]); + mcp->mc_gpregs.gp_elr = tswap64(regs->pc); + + /* XXX FP? */ + + return err; +} |