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Added vectored variant of sys_safecopy*.

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This commit is contained in:
Ben Gras
2006-06-23 11:54:03 +00:00
parent 82855e9cf5
commit d402047222
7 changed files with 140 additions and 66 deletions
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9
include/minix/com.h
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@@ -288,8 +288,9 @@
# define SYS_VM_MAP (KERNEL_CALL + 30) /* sys_vm_map() */
# define SYS_SAFECOPYFROM (KERNEL_CALL + 31) /* sys_safecopyfrom() */
# define SYS_SAFECOPYTO (KERNEL_CALL + 32) /* sys_safecopyto() */
# define SYS_VSAFECOPY (KERNEL_CALL + 33) /* sys_vsafecopy() */
#define NR_SYS_CALLS 33 /* number of system calls */
#define NR_SYS_CALLS 34 /* number of system calls */
/* Pseudo call for use in kernel/table.c. */
#define SYS_ALL_CALLS (NR_SYS_CALLS)
@@ -472,7 +473,7 @@
/* Field names for SYS_INT86 */
#define INT86_REG86 m1_p1 /* pointer to registers */
/* Field names for SYS_SAFECOPY */
/* Field names for SYS_SAFECOPY* */
#define SCP_FROM_TO m2_i1 /* from/to whom? */
#define SCP_INFO m2_i2 /* byte: DDDDSSSS Dest and Src seg */
#define SCP_GID m2_i3 /* grant id */
@@ -480,6 +481,10 @@
#define SCP_ADDRESS m2_p1 /* my own address */
#define SCP_BYTES m2_l2 /* bytes from offset */
/* Field names for SYS_VSAFECOPY* */
#define VSCP_VEC_ADDR m2_p1 /* start of vector */
#define VSCP_VEC_SIZE m2_l2 /* elements in vector */
/* For the SCP_INFO field: encoding and decoding. */
#define SCP_MAKEINFO(seg) ((seg) & 0xffff)
#define SCP_INFO2SEG(info) ((info) & 0xffff)

1
include/minix/const.h
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@@ -18,6 +18,7 @@
#define NULL ((void *)0) /* null pointer */
#define CPVEC_NR 16 /* max # of entries in a SYS_VCOPY request */
#define CPVVEC_NR 64 /* max # of entries in a SYS_VCOPY request */
#define SCPVEC_NR 64 /* max # of entries in a SYS_VSAFECOPY* request */
#define NR_IOREQS MIN(NR_BUFS, 64)
/* maximum number of entries in an iorequest */

12
include/minix/safecopies.h
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@@ -37,6 +37,18 @@ typedef struct {
char cp_reserved[8]; /* future use */
} cp_grant_t;
/* Vectored safecopy. */
struct vscp_vec {
/* Exactly one of the following must be SELF. */
endpoint_t v_from; /* source */
endpoint_t v_to; /* destination */
cp_grant_id_t v_gid; /* grant id of other process */
size_t v_offset; /* offset in other grant */
vir_bytes v_addr; /* address in copier's space */
size_t v_bytes; /* no. of bytes */
};
/* Invalid grant number. */
#define GRANT_INVALID -1
#define GRANT_VALID(g) ((g) > GRANT_INVALID)

10
include/minix/syslib.h
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@@ -97,10 +97,12 @@ _PROTOTYPE(int sys_physcopy, (endpoint_t src_proc, int src_seg, vir_bytes src_vi
endpoint_t dst_proc, int dst_seg, vir_bytes dst_vir, phys_bytes bytes));
_PROTOTYPE(int sys_safecopyfrom, (endpoint_t, cp_grant_id_t,
vir_bytes, vir_bytes, size_t, int));
_PROTOTYPE(int sys_safecopyto, (endpoint_t, cp_grant_id_t,
vir_bytes, vir_bytes, size_t, int));
/* Grant-based copy functions. */
_PROTOTYPE(int sys_safecopyfrom, (endpoint_t source, cp_grant_id_t grant,
vir_bytes grant_offset, vir_bytes my_address, size_t bytes, int my_seg));
_PROTOTYPE(int sys_safecopyto, (endpoint_t dest, cp_grant_id_t grant,
vir_bytes grant_offset, vir_bytes my_address, size_t bytes, int my_seg));
_PROTOTYPE(int sys_vsafecopy, (struct vscp_vec *copyvec, int elements));
_PROTOTYPE(int sys_memset, (unsigned long pattern,
phys_bytes base, phys_bytes bytes));