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custom message types for safecopy calls

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Ben Gras 2014-07-26 13:54:00 +02:00 committed by Lionel Sambuc
parent c24f718bb4
commit 9961d3d3e5
5 changed files with 48 additions and 40 deletions
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11
include/minix/com.h
View file

@ -358,13 +358,6 @@
/* Field names for SYS_INT86 */
#define INT86_REG86 m1_p1 /* pointer to registers */
/* Field names for SYS_SAFECOPY* */
#define SCP_FROM_TO m2_i1 /* from/to whom? */
#define SCP_GID m2_i3 /* grant id */
#define SCP_OFFSET m2_l1 /* offset within grant */
#define SCP_ADDRESS m2_p1 /* my own address */
#define SCP_BYTES m2_l2 /* bytes from offset */
/* SYS_SAFEMEMSET */
#define SMS_DST m2_i1 /* dst endpoint */
#define SMS_GID m2_i3 /* grant id */
@ -372,10 +365,6 @@
#define SMS_BYTES m2_l2 /* bytes from offset */
#define SMS_PATTERN m2_i2 /* memset() pattern */
/* Field names for SYS_VSAFECOPY* */
#define VSCP_VEC_ADDR m2_p1 /* start of vector */
#define VSCP_VEC_SIZE m2_l2 /* elements in vector */
/* Field names for SYS_SPROF, _CPROF, _PROFBUF. */
#define PROF_ACTION m7_i1 /* start/stop/reset/get */
#define PROF_MEM_SIZE m7_i2 /* available memory for data */

19
include/minix/ipc.h
View file

@ -1863,6 +1863,23 @@ typedef struct {
} mess_lsys_vm_unmap_phys;
_ASSERT_MSG_SIZE(mess_lsys_vm_unmap_phys);
typedef struct {
endpoint_t from_to;
cp_grant_id_t gid;
size_t offset;
void *address;
size_t bytes;
uint8_t padding[36];
} mess_lsys_kern_safecopy;
_ASSERT_MSG_SIZE(mess_lsys_kern_safecopy);
typedef struct {
void *vec_addr;
int vec_size;
uint8_t padding[48];
} mess_lsys_kern_vsafecopy;
_ASSERT_MSG_SIZE(mess_lsys_kern_vsafecopy);
typedef struct {
endpoint_t m_source; /* who sent the message */
int m_type; /* what kind of message is it */
@ -2101,6 +2118,8 @@ typedef struct {
mess_lc_vm_brk m_lc_vm_brk;
mess_lsys_vm_map_phys m_lsys_vm_map_phys;
mess_lsys_vm_unmap_phys m_lsys_vm_unmap_phys;
mess_lsys_kern_safecopy m_lsys_kern_safecopy;
mess_lsys_kern_vsafecopy m_lsys_kern_vsafecopy;
mess_vfs_lchardriver_cancel m_vfs_lchardriver_cancel;
mess_vfs_lchardriver_openclose m_vfs_lchardriver_openclose;

34
kernel/system/do_safecopy.c
View file

@ -2,15 +2,15 @@
* m_type: SYS_SAFECOPYFROM or SYS_SAFECOPYTO or SYS_VSAFECOPY
*
* The parameters for this kernel call are:
* SCP_FROM_TO other endpoint
* SCP_GID grant id
* SCP_OFFSET offset within granted space
* SCP_ADDRESS address in own address space
* SCP_BYTES bytes to be copied
* m_lsys_kern_safecopy.from_to other endpoint
* m_lsys_kern_safecopy.gid grant id
* m_lsys_kern_safecopy.offset offset within granted space
* m_lsys_kern_safecopy.address address in own address space
* m_lsys_kern_safecopy.bytes bytes to be copied
*
* For the vectored variant (do_vsafecopy):
* VSCP_VEC_ADDR address of vector
* VSCP_VEC_SIZE number of significant elements in vector
* m_lsys_kern_vsafecopy.vec_addr address of vector
* m_lsys_kern_vsafecopy.vec_size number of significant elements in vector
*/
#include <assert.h>
@ -318,10 +318,10 @@ int access; /* CPF_READ for a copy from granter to grantee, CPF_WRITE
*===========================================================================*/
int do_safecopy_to(struct proc * caller, message * m_ptr)
{
return safecopy(caller, m_ptr->SCP_FROM_TO, caller->p_endpoint,
(cp_grant_id_t) m_ptr->SCP_GID,
m_ptr->SCP_BYTES, m_ptr->SCP_OFFSET,
(vir_bytes) m_ptr->SCP_ADDRESS, CPF_WRITE);
return safecopy(caller, m_ptr->m_lsys_kern_safecopy.from_to, caller->p_endpoint,
(cp_grant_id_t) m_ptr->m_lsys_kern_safecopy.gid,
m_ptr->m_lsys_kern_safecopy.bytes, m_ptr->m_lsys_kern_safecopy.offset,
(vir_bytes) m_ptr->m_lsys_kern_safecopy.address, CPF_WRITE);
}
/*===========================================================================*
@ -329,10 +329,10 @@ int do_safecopy_to(struct proc * caller, message * m_ptr)
*===========================================================================*/
int do_safecopy_from(struct proc * caller, message * m_ptr)
{
return safecopy(caller, m_ptr->SCP_FROM_TO, caller->p_endpoint,
(cp_grant_id_t) m_ptr->SCP_GID,
m_ptr->SCP_BYTES, m_ptr->SCP_OFFSET,
(vir_bytes) m_ptr->SCP_ADDRESS, CPF_READ);
return safecopy(caller, m_ptr->m_lsys_kern_safecopy.from_to, caller->p_endpoint,
(cp_grant_id_t) m_ptr->m_lsys_kern_safecopy.gid,
m_ptr->m_lsys_kern_safecopy.bytes, m_ptr->m_lsys_kern_safecopy.offset,
(vir_bytes) m_ptr->m_lsys_kern_safecopy.address, CPF_READ);
}
/*===========================================================================*
@ -348,12 +348,12 @@ int do_vsafecopy(struct proc * caller, message * m_ptr)
/* Set vector copy parameters. */
src.proc_nr_e = caller->p_endpoint;
assert(src.proc_nr_e != NONE);
src.offset = (vir_bytes) m_ptr->VSCP_VEC_ADDR;
src.offset = (vir_bytes) m_ptr->m_lsys_kern_vsafecopy.vec_addr;
dst.proc_nr_e = KERNEL;
dst.offset = (vir_bytes) vec;
/* No. of vector elements. */
els = m_ptr->VSCP_VEC_SIZE;
els = m_ptr->m_lsys_kern_vsafecopy.vec_size;
bytes = els * sizeof(struct vscp_vec);
/* Obtain vector of copies. */

20
lib/libsys/sys_safecopy.c
View file

@ -13,11 +13,11 @@ int sys_safecopyfrom(endpoint_t src_e,
message copy_mess;
copy_mess.SCP_FROM_TO = src_e;
copy_mess.SCP_GID = gr_id;
copy_mess.SCP_OFFSET = (long) offset;
copy_mess.SCP_ADDRESS = (char *) address;
copy_mess.SCP_BYTES = (long) bytes;
copy_mess.m_lsys_kern_safecopy.from_to = src_e;
copy_mess.m_lsys_kern_safecopy.gid = gr_id;
copy_mess.m_lsys_kern_safecopy.offset = offset;
copy_mess.m_lsys_kern_safecopy.address = address;
copy_mess.m_lsys_kern_safecopy.bytes = bytes;
return(_kernel_call(SYS_SAFECOPYFROM, &copy_mess));
@ -33,11 +33,11 @@ int sys_safecopyto(endpoint_t dst_e,
message copy_mess;
copy_mess.SCP_FROM_TO = dst_e;
copy_mess.SCP_GID = gr_id;
copy_mess.SCP_OFFSET = (long) offset;
copy_mess.SCP_ADDRESS = (char *) address;
copy_mess.SCP_BYTES = (long) bytes;
copy_mess.m_lsys_kern_safecopy.from_to = dst_e;
copy_mess.m_lsys_kern_safecopy.gid = gr_id;
copy_mess.m_lsys_kern_safecopy.offset = offset;
copy_mess.m_lsys_kern_safecopy.address = address;
copy_mess.m_lsys_kern_safecopy.bytes = bytes;
return(_kernel_call(SYS_SAFECOPYTO, &copy_mess));

4
lib/libsys/sys_vsafecopy.c
View file

@ -9,8 +9,8 @@ int sys_vsafecopy(struct vscp_vec *vec, int els)
message copy_mess;
copy_mess.VSCP_VEC_ADDR = (char *) vec;
copy_mess.VSCP_VEC_SIZE = els;
copy_mess.m_lsys_kern_vsafecopy.vec_addr = vec;
copy_mess.m_lsys_kern_vsafecopy.vec_size = els;
return(_kernel_call(SYS_VSAFECOPY, &copy_mess));