Apple-2gs-SW/ORCALib
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When argc==0, argv should be a valid pointer and argv[0] should be NULL.

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This is normal for S16 programs or inits, and can happen with shell executables in certain cases like when being run from Prizm.
This commit is contained in:
Stephen Heumann 2018-02-27 23:56:14 -06:00
parent 33ab148cea
commit 8533ea221c
1 changed files with 14 additions and 6 deletions
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20
cc.asm
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@ -172,8 +172,8 @@ TAB equ 9 TAB key code
plb
plx
ply
pea 0 make room for argc, argv
pea 0
pea targv|-16 make room for argc, argv
per targv (default argv = ptr to targv)
pea 0
phy put the return addr back on the stack
phx
@ -190,9 +190,12 @@ TAB equ 9 TAB key code
lda cLine if cLine == 0 then
ora cLine+2
jeq rtl exit
bne lb0
stz targv argv[0] = NULL
stz targv+2
brl rtl exit
add4 cLine,#8 skip the shell identifier
lb0 add4 cLine,#8 skip the shell identifier
ldx #0 count the arguments
txy
short M
@ -348,8 +351,8 @@ start ds 2 start of the command line string
plb
plx
ply
pea 0 set argc, argv to 0
pea 0
pea targv|-16 set argc = 0, argv to point to targv
per targv
pea 0
phy put the return addr back on the stack
phx
@ -357,8 +360,13 @@ start ds 2 start of the command line string
stz ~ExitList no exit routines, yet
stz ~ExitList+2
stz targv argv[0] = NULL
stz targv+2
plb return
rtl
targv ds 4
end
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