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Added ability for sys_proc_exit to return to a shell program

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This commit is contained in:
Peter Weingartner 2024-11-06 19:43:45 -05:00
parent 947c4f96be
commit a78354c677
10 changed files with 139 additions and 67 deletions
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70
src/C256/addresses.csv
View file

@ -6,8 +6,8 @@
"sys_int_enable","FFE014"
"sys_int_register","FFE018"
"sys_int_pending","FFE01C"
"sys_get_info","FFE020"
"sys_int_clear","FFE024"
"sys_int_clear","FFE020"
"sys_get_info","FFE024"
"sys_chan_read_b","FFE028"
"sys_chan_read","FFE02C"
"sys_chan_readline","FFE030"
@ -40,35 +40,37 @@
"sys_fsys_mkdir","FFE09C"
"sys_fsys_delete","FFE0A0"
"sys_fsys_rename","FFE0A4"
"sys_fsys_set_cwd","FFE0A8"
"sys_fsys_get_cwd","FFE0AC"
"sys_fsys_load","FFE0B0"
"sys_fsys_register_loader","FFE0B4"
"sys_fsys_stat","FFE0B8"
"sys_mem_get_ramtop","FFE0BC"
"sys_mem_reserve","FFE0C0"
"sys_time_jiffies","FFE0C4"
"sys_rtc_set_time","FFE0C8"
"sys_rtc_get_time","FFE0CC"
"sys_kbd_scancode","FFE0D0"
"sys_err_message","FFE0D4"
"sys_kbd_layout","FFE0D8"
"sys_proc_run","FFE0DC"
"sys_txt_get_capabilities","FFE0E0"
"sys_txt_set_mode","FFE0E4"
"sys_txt_set_resolution","FFE0E8"
"sys_txt_setsizes","FFE0EC"
"sys_txt_set_xy","FFE0F0"
"sys_txt_get_xy","FFE0F4"
"sys_txt_get_region","FFE0F8"
"sys_txt_set_region","FFE0FC"
"sys_txt_set_color","FFE100"
"sys_txt_get_color","FFE104"
"sys_txt_set_cursor","FFE108"
"sys_txt_set_cursor_visible","FFE10C"
"sys_txt_set_font","FFE110"
"sys_txt_get_sizes","FFE114"
"sys_txt_set_border","FFE118"
"sys_txt_set_border_color","FFE11C"
"sys_txt_put","FFE120"
"sys_txt_print","FFE124"
"sys_fsys_load","FFE0A8"
"sys_fsys_register_loader","FFE0AC"
"sys_fsys_stat","FFE0B0"
"sys_mem_get_ramtop","FFE0B4"
"sys_mem_reserve","FFE0B8"
"sys_time_jiffies","FFE0BC"
"sys_rtc_set_time","FFE0C0"
"sys_rtc_get_time","FFE0C4"
"sys_kbd_scancode","FFE0C8"
"sys_err_message","FFE0CC"
"sys_kbd_layout","FFE0D0"
"sys_proc_run","FFE0D4"
"sys_txt_get_capabilities","FFE0D8"
"sys_txt_set_mode","FFE0DC"
"sys_txt_set_resolution","FFE0E0"
"sys_txt_setsizes","FFE0E4"
"sys_txt_set_xy","FFE0E8"
"sys_txt_get_xy","FFE0EC"
"sys_txt_get_region","FFE0F0"
"sys_txt_set_region","FFE0F4"
"sys_txt_set_color","FFE0F8"
"sys_txt_get_color","FFE0FC"
"sys_txt_set_cursor","FFE100"
"sys_txt_set_cursor_visible","FFE104"
"sys_txt_set_font","FFE108"
"sys_txt_get_sizes","FFE10C"
"sys_txt_set_border","FFE110"
"sys_txt_set_border_color","FFE114"
"sys_txt_put","FFE118"
"sys_txt_print","FFE11C"
"sys_kbd_handle_irq","FFE120"
"sys_reboot","FFE124"
"sys_proc_set_shell","FFE128"
"sys_proc_get_result","FFE12C"

1 sys_proc_exit FFE000
6 sys_int_enable FFE014
7 sys_int_register FFE018
8 sys_int_pending FFE01C
9 sys_get_info sys_int_clear FFE020
10 sys_int_clear sys_get_info FFE024
11 sys_chan_read_b FFE028
12 sys_chan_read FFE02C
13 sys_chan_readline FFE030
40 sys_fsys_mkdir FFE09C
41 sys_fsys_delete FFE0A0
42 sys_fsys_rename FFE0A4
43 sys_fsys_set_cwd sys_fsys_load FFE0A8
44 sys_fsys_get_cwd sys_fsys_register_loader FFE0AC
45 sys_fsys_load sys_fsys_stat FFE0B0
46 sys_fsys_register_loader sys_mem_get_ramtop FFE0B4
47 sys_fsys_stat sys_mem_reserve FFE0B8
48 sys_mem_get_ramtop sys_time_jiffies FFE0BC
49 sys_mem_reserve sys_rtc_set_time FFE0C0
50 sys_time_jiffies sys_rtc_get_time FFE0C4
51 sys_rtc_set_time sys_kbd_scancode FFE0C8
52 sys_rtc_get_time sys_err_message FFE0CC
53 sys_kbd_scancode sys_kbd_layout FFE0D0
54 sys_err_message sys_proc_run FFE0D4
55 sys_kbd_layout sys_txt_get_capabilities FFE0D8
56 sys_proc_run sys_txt_set_mode FFE0DC
57 sys_txt_get_capabilities sys_txt_set_resolution FFE0E0
58 sys_txt_set_mode sys_txt_setsizes FFE0E4
59 sys_txt_set_resolution sys_txt_set_xy FFE0E8
60 sys_txt_setsizes sys_txt_get_xy FFE0EC
61 sys_txt_set_xy sys_txt_get_region FFE0F0
62 sys_txt_get_xy sys_txt_set_region FFE0F4
63 sys_txt_get_region sys_txt_set_color FFE0F8
64 sys_txt_set_region sys_txt_get_color FFE0FC
65 sys_txt_set_color sys_txt_set_cursor FFE100
66 sys_txt_get_color sys_txt_set_cursor_visible FFE104
67 sys_txt_set_cursor sys_txt_set_font FFE108
68 sys_txt_set_cursor_visible sys_txt_get_sizes FFE10C
69 sys_txt_set_font sys_txt_set_border FFE110
70 sys_txt_get_sizes sys_txt_set_border_color FFE114
71 sys_txt_set_border sys_txt_put FFE118
72 sys_txt_set_border_color sys_txt_print FFE11C
73 sys_txt_put sys_kbd_handle_irq FFE120
74 sys_txt_print sys_reboot FFE124
75 sys_proc_set_shell FFE128
76 sys_proc_get_result FFE12C

6
src/C256/extras.s
View file

@ -1,6 +1,6 @@
.public restart_cli
.extern cli_rerepl
.extern proc_shell_address
.extern _Vfp
.extern _DirectPageStart
@ -14,7 +14,7 @@
;
; Reset the stack to the initial value.
; Reset the direct page and data bank registers
; Restart the CLI
; Transfer control to the registered shell address (if present)
;
restart_cli:
rep #0x38 ; 16-bit registers, no decimal mode
@ -33,5 +33,5 @@ restart_cli:
plb ; pop 8 dummy
plb ; set data bank
; jsl cli_rerepl
jsl proc_shell_address
bra restart_cli

23
src/C256/jumptable.s
View file

@ -6,8 +6,8 @@
.public sys_int_enable
.public sys_int_register
.public sys_int_pending
.public sys_get_info
.public sys_int_clear
.public sys_get_info
.public sys_chan_read_b
.public sys_chan_read
.public sys_chan_readline
@ -40,8 +40,6 @@
.public sys_fsys_mkdir
.public sys_fsys_delete
.public sys_fsys_rename
.public sys_fsys_set_cwd
.public sys_fsys_get_cwd
.public sys_fsys_load
.public sys_fsys_register_loader
.public sys_fsys_stat
@ -73,6 +71,9 @@
.public sys_txt_put
.public sys_txt_print
.public sys_kbd_handle_irq
.public sys_reboot
.public sys_proc_set_shell
.public sys_proc_get_result
.extern proc_exit
.extern int_enable_all
@ -82,8 +83,8 @@
.extern int_enable
.extern int_register
.extern int_pending
.extern sys_get_information
.extern int_clear
.extern sys_get_information
.extern chan_read_b
.extern chan_read
.extern chan_readline
@ -116,8 +117,6 @@
.extern fsys_mkdir
.extern fsys_delete
.extern fsys_rename
.extern fsys_set_cwd
.extern fsys_get_cwd
.extern fsys_load
.extern fsys_register_loader
.extern fsys_stat
@ -149,6 +148,9 @@
.extern txt_put
.extern txt_print
.extern kbd_handle_irq
.extern reboot
.extern proc_set_shell
.extern proc_get_result
.section jumptable
@ -160,8 +162,8 @@ sys_int_disable: jmp long:int_disable
sys_int_enable: jmp long:int_enable
sys_int_register: jmp long:int_register
sys_int_pending: jmp long:int_pending
sys_get_info: jmp long:sys_get_information
sys_int_clear: jmp long:int_clear
sys_get_info: jmp long:sys_get_information
sys_chan_read_b: jmp long:chan_read_b
sys_chan_read: jmp long:chan_read
sys_chan_readline: jmp long:chan_readline
@ -194,8 +196,6 @@ sys_fsys_set_label: jmp long:fsys_set_label
sys_fsys_mkdir: jmp long:fsys_mkdir
sys_fsys_delete: jmp long:fsys_delete
sys_fsys_rename: jmp long:fsys_rename
sys_fsys_set_cwd: jmp long:fsys_set_cwd
sys_fsys_get_cwd: jmp long:fsys_get_cwd
sys_fsys_load: jmp long:fsys_load
sys_fsys_register_loader: jmp long:fsys_register_loader
sys_fsys_stat: jmp long:fsys_stat
@ -226,4 +226,7 @@ sys_txt_set_border: jmp long:txt_set_border
sys_txt_set_border_color: jmp long:txt_set_border_color
sys_txt_put: jmp long:txt_put
sys_txt_print: jmp long:txt_print
sys_kbd_handle_irq: jmp long:kbd_handle_irq
sys_kbd_handle_irq: jmp long:kbd_handle_irq
sys_reboot: jmp long:reboot
sys_proc_set_shell: jmp long:proc_set_shell
sys_proc_get_result: jmp long:proc_get_result

3
src/C256/syscalls.txt
View file

@ -79,3 +79,6 @@ txt_put
txt_print
kbd_handle_irq
reboot
proc_set_shell
proc_get_result

29
src/include/syscalls.h
View file

@ -202,6 +202,12 @@ extern SYSTEMCALL short sys_int_pending(unsigned short n);
*/
extern SYSTEMCALL void sys_get_info(p_sys_info info);
/**
* @brief Force the system to reboot
*
*/
extern SYSTEMCALL void sys_reboot();
/*
* Acknowledge an interrupt (clear out its pending flag)
*
@ -774,21 +780,20 @@ extern SYSTEMCALL short sys_kbd_layout(const char * tables);
extern SYSTEMCALL short sys_proc_run(const char * path, int argc, char * argv[]);
/**
* Set the value of a variable
*
* @param name the name of the variable to set
* @param value the value the variable should have
* @return 0 on success, negative number on error
* @brief Set the address of the code that should handle a process exiting
*
* By default, the address is 0, which means that the system should reboot when the process exits
* If any other number is provided, the code at that location will be called as a far call using the
* simplecall convention. The first argument will be the return result passed to proc_exit
*
* @param address the address of the handler code for proc_exit
*/
extern SYSTEMCALL short sys_var_set(const char *name, const char *value);
extern SYSTEMCALL void sys_proc_set_shell(uint32_t address);
/**
* Get the value of a variable
*
* @param name the name of the variable to set
* @return pointer to the string on success, 0 if not found
/*
* Return the result code of the previously running user process
*/
extern SYSTEMCALL const char * sys_var_get(const char *name);
extern SYSTEMCALL int sys_proc_get_result();
//
// Text screen calls

42
src/proc.c
View file

@ -8,15 +8,17 @@
#include "log_level.h"
#ifndef DEFAULT_LOG_LEVEL
#define DEFAULT_LOG_LEVEL LOG_ERROR
#define DEFAULT_LOG_LEVEL LOG_INFO
#endif
#include "errors.h"
#include "log.h"
#include "sys_general.h"
#include "dev/fsys.h"
static const long k_default_stack = 0x00010000; /* For now... we're just going to put the user stack under 0x00010000 */
static int g_proc_result;
static int g_proc_result = 0;
uint32_t proc_shell_address = 0;
/*
* Assembly routine: reset the supervisor stack pointer and restart the CLI
@ -54,6 +56,8 @@ void proc_exec(long start, long stack, int argc, char * argv[]) {
call_user(start, stack, argc, argv);
}
typedef void (*thunk)();
/*
* Quit the current user process
*
@ -64,14 +68,40 @@ void proc_exec(long start, long stack, int argc, char * argv[]) {
* Inputs:
*/
SYSTEMCALL void proc_exit(int result) {
INFO1("proc_exit: %d", result);
g_proc_result = result;
restart_cli();
if (proc_shell_address != 0) {
INFO("proc_exit: Attempting to call into shell");
call_user(proc_shell_address, k_default_stack, 0, 0);
reboot();
} else {
// Otherwise ask GABE to reset the system
INFO("proc_exit: Attempting reboot");
reboot();
}
}
/*
* Return the result code of the previously running user process
/**
* @brief Set the address of the code that should handle a process exiting
*
* By default, the address is 0, which means that the system should reboot when the process exits
* If any other number is provided, the code at that location will be called as a far call.
*
* @param address the address of the handler code for proc_exit
*/
int proc_get_result() {
SYSTEMCALL void proc_set_shell(uint32_t address) {
INFO("proc_set_shell")
proc_shell_address = address;
}
/**
* Return the result code of the previously running user process
*
* @return the result code of the previously running user process
*/
SYSTEMCALL int proc_get_result() {
INFO("proc_get_result")
return g_proc_result;
}

13
src/proc.h
View file

@ -33,10 +33,21 @@ extern void proc_exec(long start, long stack, int argc, char * argv[]);
*/
extern SYSTEMCALL void proc_exit(int result);
/**
* @brief Set the address of the code that should handle a process exiting
*
* By default, the address is 0, which means that the system should reboot when the process exits
* If any other number is provided, the code at that location will be called as a far call using the
* simplecall convention. The first argument will be the return result passed to proc_exit
*
* @param address the address of the handler code for proc_exit
*/
extern SYSTEMCALL void proc_set_shell(uint32_t address);
/*
* Return the result code of the previously running user process
*/
extern int proc_get_result();
extern SYSTEMCALL int proc_get_result();
/*
* Find an executable binary matching the path, load it, and execute it

12
src/sys_general.c
View file

@ -321,6 +321,18 @@ SYSTEMCALL void sys_get_information(p_sys_info info) {
}
}
/**
* @brief Force the system to reboot
*
*/
SYSTEMCALL void reboot() {
// Authorize GABE to force a CPU reboot and trigger the reboot
uint8_t * reboot_auth = (uint8_t *)GABE_RST_AUTH;
reboot_auth[0] = 0xde;
reboot_auth[1] = 0xad;
*GABE_MSTR_CTRL |= GABE_CTRL_WRM_RST;
}
#if MODEL == MODEL_FOENIX_GENX || MODEL == MODEL_FOENIX_A2560X
static short genx_leds = 0;

6
src/sys_general.h
View file

@ -68,6 +68,12 @@
*/
extern SYSTEMCALL void sys_get_information(p_sys_info info);
/**
* @brief Force the system to reboot
*
*/
extern SYSTEMCALL void reboot();
#if MODEL == MODEL_FOENIX_GENX || MODEL == MODEL_FOENIX_A2560X
/*
* Set the color of the LED for the floppy drive

2
src/version.h
View file

@ -7,6 +7,6 @@
#define VER_MAJOR 1
#define VER_MINOR 0
#define VER_BUILD 33
#define VER_BUILD 37
#endif