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custom messages for SHMAT, SHMDT

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This commit is contained in:
Ben Gras 2014-07-26 13:53:52 +02:00 committed by Lionel Sambuc
parent 8627d33a42
commit e57d31d331
4 changed files with 27 additions and 15 deletions
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5
include/minix/com.h
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@ -828,12 +828,7 @@
/* Shared Memory */
#define IPC_SHMGET (IPC_BASE+1)
#define IPC_SHMAT (IPC_BASE+2)
# define SHMAT_ID m2_i1
# define SHMAT_ADDR m2_l1
# define SHMAT_FLAG m2_i2
# define SHMAT_RETADDR m2_l2
#define IPC_SHMDT (IPC_BASE+3)
# define SHMDT_ADDR m2_l1
#define IPC_SHMCTL (IPC_BASE+4)
# define SHMCTL_ID m2_i1
# define SHMCTL_CMD m2_i2

17
include/minix/ipc.h
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@ -1774,6 +1774,21 @@ typedef struct {
} mess_lc_ipc_shmget;
_ASSERT_MSG_SIZE(mess_lc_ipc_shmget);
typedef struct {
int id;
const void *addr;
int flag;
void *retaddr;
uint8_t padding[40];
} mess_lc_ipc_shmat;
_ASSERT_MSG_SIZE(mess_lc_ipc_shmat);
typedef struct {
const void *addr;
uint8_t padding[52];
} mess_lc_ipc_shmdt;
_ASSERT_MSG_SIZE(mess_lc_ipc_shmdt);
typedef struct {
endpoint_t m_source; /* who sent the message */
int m_type; /* what kind of message is it */
@ -2001,6 +2016,8 @@ typedef struct {
mess_lsys_vm_update m_lsys_vm_update;
mess_lsys_vm_watch_exit m_lsys_vm_watch_exit;
mess_lc_ipc_shmget m_lc_ipc_shmget;
mess_lc_ipc_shmat m_lc_ipc_shmat;
mess_lc_ipc_shmdt m_lc_ipc_shmdt;
mess_vfs_lchardriver_cancel m_vfs_lchardriver_cancel;
mess_vfs_lchardriver_openclose m_vfs_lchardriver_openclose;

10
lib/libc/sys-minix/shmat.c
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@ -33,14 +33,14 @@ void *shmat(int shmid, const void *shmaddr, int shmflg)
}
memset(&m, 0, sizeof(m));
m.SHMAT_ID = shmid;
m.SHMAT_ADDR = (long) shmaddr;
m.SHMAT_FLAG = shmflg;
m.m_lc_ipc_shmat.id = shmid;
m.m_lc_ipc_shmat.addr = shmaddr;
m.m_lc_ipc_shmat.flag = shmflg;
r = _syscall(ipc_pt, IPC_SHMAT, &m);
if (r != OK)
return (void *) -1;
return (void *) m.SHMAT_RETADDR;
return m.m_lc_ipc_shmat.retaddr;
}
/* Deattach shared memory segment. */
@ -55,7 +55,7 @@ int shmdt(const void *shmaddr)
}
memset(&m, 0, sizeof(m));
m.SHMDT_ADDR = (long) shmaddr;
m.m_lc_ipc_shmdt.addr = shmaddr;
return _syscall(ipc_pt, IPC_SHMDT, &m);
}

10
servers/ipc/shm.c
View File

@ -111,9 +111,9 @@ int do_shmat(message *m)
void *ret;
struct shm_struct *shm;
id = m->SHMAT_ID;
addr = (vir_bytes) m->SHMAT_ADDR;
flag = m->SHMAT_FLAG;
id = m->m_lc_ipc_shmat.id;
addr = (vir_bytes) m->m_lc_ipc_shmat.addr;
flag = m->m_lc_ipc_shmat.flag;
if (addr && (addr % PAGE_SIZE)) {
if (flag & SHM_RND)
@ -141,7 +141,7 @@ int do_shmat(message *m)
shm->shmid_ds.shm_lpid = getnpid(who_e);
/* nattach is updated lazily */
m->SHMAT_RETADDR = (long) ret;
m->m_lc_ipc_shmat.retaddr = ret;
return OK;
}
@ -186,7 +186,7 @@ int do_shmdt(message *m)
phys_bytes vm_id;
int i;
addr = m->SHMDT_ADDR;
addr = (vir_bytes) m->m_lc_ipc_shmdt.addr;
if ((vm_id = vm_getphys(who_e, (void *) addr)) == 0)
return EINVAL;