200 lines
4.6 KiB
Text
200 lines
4.6 KiB
Text
rax, rdi, rsi, rdx are in/out paramters.
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rbx, rbp, rsp, r12-r15 are preserved.
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rcx, rflags, r8-r11 are clobbered.
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interrupts (including the timer!) are disabled during system calls.
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stream result:
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0 = success
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1 = bad handle
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2 = io error
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3 = out of bounds
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4 = does not exist
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5 = not a regular file
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6 = not an executable
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7 = not writable
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8 = not seekable
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9 = socket id already used
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10 = socket id not in use
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11 = socket listener closed
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12 = other end closed
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13 = already exists
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14 = not sized
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15 = not readable
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encode color:
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rax in: 0
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edi in: r + g * 256 + b * 65536
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eax out: encoded color
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get framebuffer:
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rax in: 1
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rax out: pointer to framebuffer
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rdi out: width + height * 2 ** 32
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esi out: pitch
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framebuffer is always 32 bpp. use the encode color syscall
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to encode colors. pitch is in dwords, not in bytes.
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open file:
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rax in: 2
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rdi in: pointer to file path
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rsi in: file path length
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rdx in:
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bit 0: allow creation
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bit 1: only allow creation
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rax out: stream result
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rdi out: stream handle (if rax = success)
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end this thread:
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rax in: 3
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edi in: exit code (signed, only used if this was last thread)
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get new pages:
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rax in: 4
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rdi in: number of pages to allocate
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rax out: start of first page
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the allocated pages are next to each other, writable, and not executable.
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get input packet:
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rax in: 5
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al out:
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bit 7: was mouse packet
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if bit 7:
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bit 0: left mouse button down
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bit 1: right mouse button down
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bit 2: middle mouse button down
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if bit 7:
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di out: mouse x change (signed)
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si out: mouse y change (signed)
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else:
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edi out: key packet
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create private socket:
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rax in: 6
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rax out: end 1 stream handle
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rdi out: end 2 stream handle
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create socket listener:
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rax in: 7
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rdi in: pointer to id string
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rsi in: id string length
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rax out: stream result
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rdi out: listener handle (if rax = 0)
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stop socket listener:
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rax in: 8
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rdi in: listener handle
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accept socket connection:
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rax in: 9
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rdi in: listener handle
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rax out: stream result
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rdi out: stream handle
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connect to socket:
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rax in: 10
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rdi in: pointer to id string
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rsi in: id string length
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rax out: stream result
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rdi out: stream handle (if rax = 0)
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close stream:
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rax in: 11
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rdi in: stream handle
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seek stream:
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returns "not seekable" for sockets
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rax in: 12
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rdi in: stream handle
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sil in:
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0 = relative to beginning
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1 = relative to end
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2 = relative to current position
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rdx in: offset (signed)
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rax out: stream result
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read from stream:
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rax in: 13
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rdi in: stream handle
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rsi in: count
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rdx in: pointer to buffer
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rax out: stream result
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write to stream:
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rax in: 14
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rdi in: stream handle
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rsi in: count
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rdx in: pointer to buffer
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rax out: stream result
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get stream length:
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returns "not sized" for sockets
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rax in: 15
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rdi in: stream handle
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rax out: stream result
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rdi out: stream length (if rax = success)
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start process:
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rax in: 16
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rdi in: pointer to process start info struct
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rax out: stream result
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rdi out: process handle (if rax = success)
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process start info struct:
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qword: file path length
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qword: pointer to file path
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qword: count of environment variables
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qword: pointer to array of environment variable structs
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qword: count of gifted stream ends
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qword: pointer to array of gifted stream structs
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environment variable struct:
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qword: name length
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qword: pointer to name
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qword: value length
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qword: pointer to value
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gifted stream struct:
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qword: stream handle here
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qword: new stream handle in child
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new handle must be < 65536
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any gifted streams must not have threads waiting to read from our end
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end this process:
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rax in: 17
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edi in: exit code (signed)
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set stream length:
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returns "not sized" for sockets
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rax in: 18
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rdi in: stream handle
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rsi in: new length
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rax out: stream result
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get other end process handle:
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returns "other end closed" for files
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rax in: 19
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rdi in: stream handle
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rax out: stream result
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rdi out: process handle (if rax = success)
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start thread:
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rax in: 20
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rdi in: entry point
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rsi in: argument
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at entry, rsp is set to the top of a new stack, rdi is set
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to the argument, and the other registers are undefined.
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clear socket read queue:
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rax in: 21
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rdi in: stream handle
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rax out: number of bytes cleared (0 on bad handle or not a socket)
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get environment variable length:
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rax in: 22
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rdi in: pointer to variable name
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rsi in: variable name length
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rax out: variable value length, or -1 if unset
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get environment variable value:
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rax in: 23
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rdi in: pointer to variable name
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rsi in: variable name length
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rdx in: pointer to buffer for variable value
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