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Push and pop db_recover for error handling, so we can set up temporary catch 

points easily.  (Alluded to by m68k code, but not implemented yet for some
reason.)
This commit is contained in:
mycroft 1994-01-09 22:35:10 +00:00
parent 384b7f777a
commit 6b3e4e6b02
1 changed files with 16 additions and 13 deletions
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29
sys/ddb/db_command.c
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@ -23,7 +23,7 @@
* any improvements or extensions that they make and grant Carnegie the * any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes. * rights to redistribute these changes.
* *
* $Id: db_command.c,v 1.7 1993/12/18 04:46:29 mycroft Exp $ * $Id: db_command.c,v 1.8 1994/01/09 22:35:10 mycroft Exp $
*/ */
/* /*
@ -43,7 +43,7 @@
* Exported global variables * Exported global variables
*/ */
boolean_t db_cmd_loop_done; boolean_t db_cmd_loop_done;
jmp_buf db_jmpbuf; jmp_buf *db_recover;
db_addr_t db_dot; db_addr_t db_dot;
db_addr_t db_last_addr; db_addr_t db_last_addr;
db_addr_t db_prev; db_addr_t db_prev;
@ -56,7 +56,6 @@ db_addr_t db_next;
*/ */
boolean_t db_ed_style = TRUE; boolean_t db_ed_style = TRUE;
/* /*
* Utility routine - discard tokens through end-of-line. * Utility routine - discard tokens through end-of-line.
*/ */
@ -425,7 +424,9 @@ db_help_cmd()
void void
db_command_loop() db_command_loop()
{ {
extern int db_output_line; jmp_buf db_jmpbuf;
jmp_buf *savejmp = db_recover;
extern int db_output_line;
/* /*
* Initialize 'prev' and 'next' to dot. * Initialize 'prev' and 'next' to dot.
@ -434,18 +435,20 @@ db_command_loop()
db_next = db_dot; db_next = db_dot;
db_cmd_loop_done = 0; db_cmd_loop_done = 0;
(void) setjmp(db_recover = &db_jmpbuf);
while (!db_cmd_loop_done) { while (!db_cmd_loop_done) {
if (db_print_position() != 0)
db_printf("\n");
db_output_line = 0;
(void) setjmp(db_jmpbuf); db_printf("db> ");
if (db_print_position() != 0) (void) db_read_line();
db_printf("\n");
db_output_line = 0;
db_printf("db> "); db_command(&db_last_command, db_command_table);
(void) db_read_line();
db_command(&db_last_command, db_command_table);
} }
db_recover = savejmp;
} }
void void
@ -455,7 +458,7 @@ db_error(s)
if (s) if (s)
db_printf(s); db_printf(s);
db_flush_lex(); db_flush_lex();
longjmp(db_jmpbuf, 1); longjmp(db_recover, 1);
} }