Differential D13875 Diff 38729 head/sys/mips/mips/pm_machdep.c

Changeset View

Standalone View

head/sys/mips/mips/pm_machdep.c

Show First 20 Lines • Show All 56 Lines • ▼ Show 20 Lines
#include <sys/ptrace.h>		#include <sys/ptrace.h>
#include <sys/syslog.h>		#include <sys/syslog.h>
#include <vm/vm.h>		#include <vm/vm.h>
#include <vm/pmap.h>		#include <vm/pmap.h>
#include <vm/vm_map.h>		#include <vm/vm_map.h>
#include <vm/vm_extern.h>		#include <vm/vm_extern.h>
#include <sys/user.h>		#include <sys/user.h>
#include <sys/uio.h>		#include <sys/uio.h>
		#include <machine/abi.h>
#include <machine/cpuinfo.h>		#include <machine/cpuinfo.h>
#include <machine/reg.h>		#include <machine/reg.h>
#include <machine/md_var.h>		#include <machine/md_var.h>
#include <machine/sigframe.h>		#include <machine/sigframe.h>
#include <machine/tls.h>		#include <machine/tls.h>
#include <machine/vmparam.h>		#include <machine/vmparam.h>
#include <sys/vnode.h>		#include <sys/vnode.h>
#include <fs/pseudofs/pseudofs.h>		#include <fs/pseudofs/pseudofs.h>
▲ Show 20 Lines • Show All 54 Lines • ▼ Show 20 Lines	bcopy((void *)&td->td_frame->f0,
sizeof(sf.sf_uc.uc_mcontext.mc_fpregs));		sizeof(sf.sf_uc.uc_mcontext.mc_fpregs));
}		}

/* Allocate and validate space for the signal handler context. */		/* Allocate and validate space for the signal handler context. */
if ((td->td_pflags & TDP_ALTSTACK) != 0 && !oonstack &&		if ((td->td_pflags & TDP_ALTSTACK) != 0 && !oonstack &&
SIGISMEMBER(psp->ps_sigonstack, sig)) {		SIGISMEMBER(psp->ps_sigonstack, sig)) {
sfp = (struct sigframe *)(((uintptr_t)td->td_sigstk.ss_sp +		sfp = (struct sigframe *)(((uintptr_t)td->td_sigstk.ss_sp +
td->td_sigstk.ss_size - sizeof(struct sigframe))		td->td_sigstk.ss_size - sizeof(struct sigframe))
& ~(sizeof(__int64_t) - 1));		& ~(STACK_ALIGN - 1));
} else		} else
sfp = (struct sigframe *)((vm_offset_t)(regs->sp -		sfp = (struct sigframe *)((vm_offset_t)(regs->sp -
sizeof(struct sigframe)) & ~(sizeof(__int64_t) - 1));		sizeof(struct sigframe)) & ~(STACK_ALIGN - 1));

/* Build the argument list for the signal handler. */		/* Build the argument list for the signal handler. */
regs->a0 = sig;		regs->a0 = sig;
regs->a2 = (register_t)(intptr_t)&sfp->sf_uc;		regs->a2 = (register_t)(intptr_t)&sfp->sf_uc;
if (SIGISMEMBER(psp->ps_siginfo, sig)) {		if (SIGISMEMBER(psp->ps_siginfo, sig)) {
/* Signal handler installed with SA_SIGINFO. */		/* Signal handler installed with SA_SIGINFO. */
regs->a1 = (register_t)(intptr_t)&sfp->sf_si;		regs->a1 = (register_t)(intptr_t)&sfp->sf_si;
/* sf.sf_ahu.sf_action = (__siginfohandler_t )catcher; /		/* sf.sf_ahu.sf_action = (__siginfohandler_t )catcher; /
▲ Show 20 Lines • Show All 256 Lines • ▼ Show 20 Lines
* code by the MIPS elf abi).		* code by the MIPS elf abi).
*/		*/
void		void
exec_setregs(struct thread td, struct image_params imgp, u_long stack)		exec_setregs(struct thread td, struct image_params imgp, u_long stack)
{		{

bzero((caddr_t)td->td_frame, sizeof(struct trapframe));		bzero((caddr_t)td->td_frame, sizeof(struct trapframe));

/*		td->td_frame->sp = ((register_t)stack) & ~(STACK_ALIGN - 1);
* The stack pointer has to be aligned to accommodate the largest
* datatype at minimum. This probably means it should be 16-byte
* aligned, but for now we're 8-byte aligning it.
*/
td->td_frame->sp = ((register_t) stack) & ~(sizeof(__int64_t) - 1);

/*		/*
* If we're running o32 or n32 programs but have 64-bit registers,		* If we're running o32 or n32 programs but have 64-bit registers,
* GCC may use stack-relative addressing near the top of user		* GCC may use stack-relative addressing near the top of user
* address space that, due to sign extension, will yield an		* address space that, due to sign extension, will yield an
* invalid address. For instance, if sp is 0x7fffff00 then GCC		* invalid address. For instance, if sp is 0x7fffff00 then GCC
* might do something like this to load a word from 0x7ffffff0:		* might do something like this to load a word from 0x7ffffff0:
*		*
▲ Show 20 Lines • Show All 77 Lines • Show Last 20 Lines