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std.start: add sh support

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Alex Rønne Petersen 2025-10-23 06:18:22 +02:00
parent c792ebfee2
commit 4193ea8239
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1 changed files with 16 additions and 0 deletions
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16
lib/std/start.zig
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@ -212,6 +212,7 @@ fn _start() callconv(.naked) noreturn {
else
".cfi_undefined ra",
.s390x => ".cfi_undefined %%r14",
.sh, .sheb => ".cfi_undefined pr",
.sparc, .sparc64 => ".cfi_undefined %%i7",
.x86 => ".cfi_undefined %%eip",
.x86_64 => ".cfi_undefined %%rip",
@ -455,6 +456,21 @@ fn _start() callconv(.naked) noreturn {
\\ stg %%r0, 0(%%r15)
\\ jg %[posixCallMainAndExit]
,
.sh, .sheb =>
// r14 = FP, r15 = SP, pr = LR
\\ mov #0, r0
\\ lds r0, pr
\\ mov r0, r14
\\ mov r15, r4
\\ mov #-4, r0
\\ and r0, r15
\\ mov.l 2f, r1
\\1:
\\ bsrf r1
\\2:
\\ .balign 4
\\ .long %[posixCallMainAndExit]@PCREL - (1b + 4 - .)
,
.sparc =>
// argc is stored after a register window (16 registers * 4 bytes).
// i7 = LR