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[pxe] Modularise PXE API provision

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Use the linker table infrastructure to dispatch PXE API calls to the
relevant function.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2011-12-11 01:35:49 +00:00
parent 61944ed602
commit fa410e0a41
8 changed files with 272 additions and 468 deletions
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314
src/arch/i386/interface/pxe/pxe_call.c
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@@ -41,73 +41,6 @@ extern void pxe_int_1a ( void );
/** INT 1A hooked flag */
static int int_1a_hooked = 0;
/** A function pointer to hold any PXE API call
*
* Used by pxe_api_call() to avoid large swathes of duplicated code.
*/
union pxenv_call {
PXENV_EXIT_t ( * any ) ( union u_PXENV_ANY * );
PXENV_EXIT_t ( * unknown ) ( struct s_PXENV_UNKNOWN * );
PXENV_EXIT_t ( * unload_stack ) ( struct s_PXENV_UNLOAD_STACK * );
PXENV_EXIT_t ( * get_cached_info )
( struct s_PXENV_GET_CACHED_INFO * );
PXENV_EXIT_t ( * restart_tftp ) ( struct s_PXENV_TFTP_READ_FILE * );
PXENV_EXIT_t ( * start_undi ) ( struct s_PXENV_START_UNDI * );
PXENV_EXIT_t ( * stop_undi ) ( struct s_PXENV_STOP_UNDI * );
PXENV_EXIT_t ( * start_base ) ( struct s_PXENV_START_BASE * );
PXENV_EXIT_t ( * stop_base ) ( struct s_PXENV_STOP_BASE * );
PXENV_EXIT_t ( * tftp_open ) ( struct s_PXENV_TFTP_OPEN * );
PXENV_EXIT_t ( * tftp_close ) ( struct s_PXENV_TFTP_CLOSE * );
PXENV_EXIT_t ( * tftp_read ) ( struct s_PXENV_TFTP_READ * );
PXENV_EXIT_t ( * tftp_read_file ) ( struct s_PXENV_TFTP_READ_FILE * );
PXENV_EXIT_t ( * tftp_get_fsize ) ( struct s_PXENV_TFTP_GET_FSIZE * );
PXENV_EXIT_t ( * udp_open ) ( struct s_PXENV_UDP_OPEN * );
PXENV_EXIT_t ( * udp_close ) ( struct s_PXENV_UDP_CLOSE * );
PXENV_EXIT_t ( * udp_write ) ( struct s_PXENV_UDP_WRITE * );
PXENV_EXIT_t ( * udp_read ) ( struct s_PXENV_UDP_READ * );
PXENV_EXIT_t ( * undi_startup ) ( struct s_PXENV_UNDI_STARTUP * );
PXENV_EXIT_t ( * undi_cleanup ) ( struct s_PXENV_UNDI_CLEANUP * );
PXENV_EXIT_t ( * undi_initialize )
( struct s_PXENV_UNDI_INITIALIZE * );
PXENV_EXIT_t ( * undi_reset_adapter ) ( struct s_PXENV_UNDI_RESET * );
PXENV_EXIT_t ( * undi_shutdown ) ( struct s_PXENV_UNDI_SHUTDOWN * );
PXENV_EXIT_t ( * undi_open ) ( struct s_PXENV_UNDI_OPEN * );
PXENV_EXIT_t ( * undi_close ) ( struct s_PXENV_UNDI_CLOSE * );
PXENV_EXIT_t ( * undi_transmit ) ( struct s_PXENV_UNDI_TRANSMIT * );
PXENV_EXIT_t ( * undi_set_mcast_address )
( struct s_PXENV_UNDI_SET_MCAST_ADDRESS * );
PXENV_EXIT_t ( * undi_set_station_address )
( struct s_PXENV_UNDI_SET_STATION_ADDRESS * );
PXENV_EXIT_t ( * undi_set_packet_filter )
( struct s_PXENV_UNDI_SET_PACKET_FILTER * );
PXENV_EXIT_t ( * undi_get_information )
( struct s_PXENV_UNDI_GET_INFORMATION * );
PXENV_EXIT_t ( * undi_get_statistics )
( struct s_PXENV_UNDI_GET_STATISTICS * );
PXENV_EXIT_t ( * undi_clear_statistics )
( struct s_PXENV_UNDI_CLEAR_STATISTICS * );
PXENV_EXIT_t ( * undi_initiate_diags )
( struct s_PXENV_UNDI_INITIATE_DIAGS * );
PXENV_EXIT_t ( * undi_force_interrupt )
( struct s_PXENV_UNDI_FORCE_INTERRUPT * );
PXENV_EXIT_t ( * undi_get_mcast_address )
( struct s_PXENV_UNDI_GET_MCAST_ADDRESS * );
PXENV_EXIT_t ( * undi_get_nic_type )
( struct s_PXENV_UNDI_GET_NIC_TYPE * );
PXENV_EXIT_t ( * undi_get_iface_info )
( struct s_PXENV_UNDI_GET_IFACE_INFO * );
PXENV_EXIT_t ( * undi_get_state ) ( struct s_PXENV_UNDI_GET_STATE * );
PXENV_EXIT_t ( * undi_isr ) ( struct s_PXENV_UNDI_ISR * );
PXENV_EXIT_t ( * file_open ) ( struct s_PXENV_FILE_OPEN * );
PXENV_EXIT_t ( * file_close ) ( struct s_PXENV_FILE_CLOSE * );
PXENV_EXIT_t ( * file_select ) ( struct s_PXENV_FILE_SELECT * );
PXENV_EXIT_t ( * file_read ) ( struct s_PXENV_FILE_READ * );
PXENV_EXIT_t ( * get_file_size ) ( struct s_PXENV_GET_FILE_SIZE * );
PXENV_EXIT_t ( * file_exec ) ( struct s_PXENV_FILE_EXEC * );
PXENV_EXIT_t ( * file_api_check ) ( struct s_PXENV_FILE_API_CHECK * );
PXENV_EXIT_t ( * file_exit_hook ) ( struct s_PXENV_FILE_EXIT_HOOK * );
};
/**
* Handle an unknown PXE API call
*
@@ -120,6 +53,26 @@ static PXENV_EXIT_t pxenv_unknown ( struct s_PXENV_UNKNOWN *pxenv_unknown ) {
return PXENV_EXIT_FAILURE;
}
/** Unknown PXE API call list */
struct pxe_api_call pxenv_unknown_api __pxe_api_call =
PXE_API_CALL ( PXENV_UNKNOWN, pxenv_unknown, struct s_PXENV_UNKNOWN );
/**
* Locate PXE API call
*
* @v opcode Opcode
* @ret call PXE API call, or NULL
*/
static struct pxe_api_call * find_pxe_api_call ( uint16_t opcode ) {
struct pxe_api_call *call;
for_each_table_entry ( call, PXE_API_CALLS ) {
if ( call->opcode == opcode )
return call;
}
return NULL;
}
/**
* Dispatch PXE API call
*
@@ -128,220 +81,30 @@ static PXENV_EXIT_t pxenv_unknown ( struct s_PXENV_UNKNOWN *pxenv_unknown ) {
* @ret ax PXE exit code
*/
__asmcall void pxe_api_call ( struct i386_all_regs *ix86 ) {
int opcode = ix86->regs.bx;
userptr_t parameters = real_to_user ( ix86->segs.es, ix86->regs.di );
size_t param_len;
union u_PXENV_ANY pxenv_any;
union pxenv_call pxenv_call;
uint16_t opcode = ix86->regs.bx;
userptr_t uparams = real_to_user ( ix86->segs.es, ix86->regs.di );
struct pxe_api_call *call;
union u_PXENV_ANY params;
PXENV_EXIT_t ret;
switch ( opcode ) {
case PXENV_UNLOAD_STACK:
pxenv_call.unload_stack = pxenv_unload_stack;
param_len = sizeof ( pxenv_any.unload_stack );
break;
case PXENV_GET_CACHED_INFO:
pxenv_call.get_cached_info = pxenv_get_cached_info;
param_len = sizeof ( pxenv_any.get_cached_info );
break;
case PXENV_RESTART_TFTP:
pxenv_call.restart_tftp = pxenv_restart_tftp;
param_len = sizeof ( pxenv_any.restart_tftp );
break;
case PXENV_START_UNDI:
pxenv_call.start_undi = pxenv_start_undi;
param_len = sizeof ( pxenv_any.start_undi );
break;
case PXENV_STOP_UNDI:
pxenv_call.stop_undi = pxenv_stop_undi;
param_len = sizeof ( pxenv_any.stop_undi );
break;
case PXENV_START_BASE:
pxenv_call.start_base = pxenv_start_base;
param_len = sizeof ( pxenv_any.start_base );
break;
case PXENV_STOP_BASE:
pxenv_call.stop_base = pxenv_stop_base;
param_len = sizeof ( pxenv_any.stop_base );
break;
case PXENV_TFTP_OPEN:
pxenv_call.tftp_open = pxenv_tftp_open;
param_len = sizeof ( pxenv_any.tftp_open );
break;
case PXENV_TFTP_CLOSE:
pxenv_call.tftp_close = pxenv_tftp_close;
param_len = sizeof ( pxenv_any.tftp_close );
break;
case PXENV_TFTP_READ:
pxenv_call.tftp_read = pxenv_tftp_read;
param_len = sizeof ( pxenv_any.tftp_read );
break;
case PXENV_TFTP_READ_FILE:
pxenv_call.tftp_read_file = pxenv_tftp_read_file;
param_len = sizeof ( pxenv_any.tftp_read_file );
break;
case PXENV_TFTP_GET_FSIZE:
pxenv_call.tftp_get_fsize = pxenv_tftp_get_fsize;
param_len = sizeof ( pxenv_any.tftp_get_fsize );
break;
case PXENV_UDP_OPEN:
pxenv_call.udp_open = pxenv_udp_open;
param_len = sizeof ( pxenv_any.udp_open );
break;
case PXENV_UDP_CLOSE:
pxenv_call.udp_close = pxenv_udp_close;
param_len = sizeof ( pxenv_any.udp_close );
break;
case PXENV_UDP_WRITE:
pxenv_call.udp_write = pxenv_udp_write;
param_len = sizeof ( pxenv_any.udp_write );
break;
case PXENV_UDP_READ:
pxenv_call.udp_read = pxenv_udp_read;
param_len = sizeof ( pxenv_any.udp_read );
break;
case PXENV_UNDI_STARTUP:
pxenv_call.undi_startup = pxenv_undi_startup;
param_len = sizeof ( pxenv_any.undi_startup );
break;
case PXENV_UNDI_CLEANUP:
pxenv_call.undi_cleanup = pxenv_undi_cleanup;
param_len = sizeof ( pxenv_any.undi_cleanup );
break;
case PXENV_UNDI_INITIALIZE:
pxenv_call.undi_initialize = pxenv_undi_initialize;
param_len = sizeof ( pxenv_any.undi_initialize );
break;
case PXENV_UNDI_RESET_ADAPTER:
pxenv_call.undi_reset_adapter = pxenv_undi_reset_adapter;
param_len = sizeof ( pxenv_any.undi_reset_adapter );
break;
case PXENV_UNDI_SHUTDOWN:
pxenv_call.undi_shutdown = pxenv_undi_shutdown;
param_len = sizeof ( pxenv_any.undi_shutdown );
break;
case PXENV_UNDI_OPEN:
pxenv_call.undi_open = pxenv_undi_open;
param_len = sizeof ( pxenv_any.undi_open );
break;
case PXENV_UNDI_CLOSE:
pxenv_call.undi_close = pxenv_undi_close;
param_len = sizeof ( pxenv_any.undi_close );
break;
case PXENV_UNDI_TRANSMIT:
pxenv_call.undi_transmit = pxenv_undi_transmit;
param_len = sizeof ( pxenv_any.undi_transmit );
break;
case PXENV_UNDI_SET_MCAST_ADDRESS:
pxenv_call.undi_set_mcast_address =
pxenv_undi_set_mcast_address;
param_len = sizeof ( pxenv_any.undi_set_mcast_address );
break;
case PXENV_UNDI_SET_STATION_ADDRESS:
pxenv_call.undi_set_station_address =
pxenv_undi_set_station_address;
param_len = sizeof ( pxenv_any.undi_set_station_address );
break;
case PXENV_UNDI_SET_PACKET_FILTER:
pxenv_call.undi_set_packet_filter =
pxenv_undi_set_packet_filter;
param_len = sizeof ( pxenv_any.undi_set_packet_filter );
break;
case PXENV_UNDI_GET_INFORMATION:
pxenv_call.undi_get_information = pxenv_undi_get_information;
param_len = sizeof ( pxenv_any.undi_get_information );
break;
case PXENV_UNDI_GET_STATISTICS:
pxenv_call.undi_get_statistics = pxenv_undi_get_statistics;
param_len = sizeof ( pxenv_any.undi_get_statistics );
break;
case PXENV_UNDI_CLEAR_STATISTICS:
pxenv_call.undi_clear_statistics = pxenv_undi_clear_statistics;
param_len = sizeof ( pxenv_any.undi_clear_statistics );
break;
case PXENV_UNDI_INITIATE_DIAGS:
pxenv_call.undi_initiate_diags = pxenv_undi_initiate_diags;
param_len = sizeof ( pxenv_any.undi_initiate_diags );
break;
case PXENV_UNDI_FORCE_INTERRUPT:
pxenv_call.undi_force_interrupt = pxenv_undi_force_interrupt;
param_len = sizeof ( pxenv_any.undi_force_interrupt );
break;
case PXENV_UNDI_GET_MCAST_ADDRESS:
pxenv_call.undi_get_mcast_address =
pxenv_undi_get_mcast_address;
param_len = sizeof ( pxenv_any.undi_get_mcast_address );
break;
case PXENV_UNDI_GET_NIC_TYPE:
pxenv_call.undi_get_nic_type = pxenv_undi_get_nic_type;
param_len = sizeof ( pxenv_any.undi_get_nic_type );
break;
case PXENV_UNDI_GET_IFACE_INFO:
pxenv_call.undi_get_iface_info = pxenv_undi_get_iface_info;
param_len = sizeof ( pxenv_any.undi_get_iface_info );
break;
case PXENV_UNDI_ISR:
pxenv_call.undi_isr = pxenv_undi_isr;
param_len = sizeof ( pxenv_any.undi_isr );
break;
case PXENV_FILE_OPEN:
pxenv_call.file_open = pxenv_file_open;
param_len = sizeof ( pxenv_any.file_open );
break;
case PXENV_FILE_CLOSE:
pxenv_call.file_close = pxenv_file_close;
param_len = sizeof ( pxenv_any.file_close );
break;
case PXENV_FILE_SELECT:
pxenv_call.file_select = pxenv_file_select;
param_len = sizeof ( pxenv_any.file_select );
break;
case PXENV_FILE_READ:
pxenv_call.file_read = pxenv_file_read;
param_len = sizeof ( pxenv_any.file_read );
break;
case PXENV_GET_FILE_SIZE:
pxenv_call.get_file_size = pxenv_get_file_size;
param_len = sizeof ( pxenv_any.get_file_size );
break;
case PXENV_FILE_EXEC:
pxenv_call.file_exec = pxenv_file_exec;
param_len = sizeof ( pxenv_any.file_exec );
break;
case PXENV_FILE_API_CHECK:
pxenv_call.file_api_check = pxenv_file_api_check;
param_len = sizeof ( pxenv_any.file_api_check );
break;
case PXENV_FILE_EXIT_HOOK:
pxenv_call.file_exit_hook = pxenv_file_exit_hook;
param_len = sizeof ( pxenv_any.file_exit_hook );
break;
default:
DBG ( "PXENV_UNKNOWN_%hx", opcode );
pxenv_call.unknown = pxenv_unknown;
param_len = sizeof ( pxenv_any.unknown );
break;
/* Locate API call */
call = find_pxe_api_call ( opcode );
if ( ! call ) {
DBGC ( &pxe_netdev, "PXENV_UNKNOWN_%04x\n", opcode );
call = &pxenv_unknown_api;
}
/* Copy parameter block from caller */
copy_from_user ( &pxenv_any, parameters, 0, param_len );
copy_from_user ( &params, uparams, 0, call->params_len );
/* Set default status in case child routine fails to do so */
pxenv_any.Status = PXENV_STATUS_FAILURE;
params.Status = PXENV_STATUS_FAILURE;
/* Hand off to relevant API routine */
DBG ( "[" );
ret = pxenv_call.any ( &pxenv_any );
if ( pxenv_any.Status != PXENV_STATUS_SUCCESS ) {
DBG ( " %02x", pxenv_any.Status );
}
if ( ret != PXENV_EXIT_SUCCESS ) {
DBG ( ret == PXENV_EXIT_FAILURE ? " err" : " ??" );
}
DBG ( "]" );
ret = call->entry ( &params );
/* Copy modified parameter block back to caller and return */
copy_to_user ( parameters, 0, &pxenv_any, param_len );
copy_to_user ( uparams, 0, &params, call->params_len );
ix86->regs.ax = ret;
}
@@ -351,8 +114,7 @@ __asmcall void pxe_api_call ( struct i386_all_regs *ix86 ) {
* @v ix86 Registers for PXE call
* @ret present Zero (PXE stack present)
*/
int pxe_api_call_weak ( struct i386_all_regs *ix86 )
{
int pxe_api_call_weak ( struct i386_all_regs *ix86 ) {
pxe_api_call ( ix86 );
return 0;
}
@@ -519,3 +281,9 @@ int pxe_start_nbp ( void ) {
return rc;
}
REQUIRE_OBJECT ( pxe_preboot );
REQUIRE_OBJECT ( pxe_undi );
REQUIRE_OBJECT ( pxe_udp );
REQUIRE_OBJECT ( pxe_tftp );
REQUIRE_OBJECT ( pxe_file );