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std.start: add microblaze support

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Alex Rønne Petersen 2025-10-23 07:24:24 +02:00
parent 252e1fd7ec
commit c792ebfee2
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1 changed files with 11 additions and 0 deletions
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lib/std/start.zig
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@ -203,6 +203,7 @@ fn _start() callconv(.naked) noreturn {
.hexagon => ".cfi_undefined r31", .hexagon => ".cfi_undefined r31",
.loongarch32, .loongarch64 => ".cfi_undefined 1", .loongarch32, .loongarch64 => ".cfi_undefined 1",
.m68k => ".cfi_undefined %%pc", .m68k => ".cfi_undefined %%pc",
.microblaze, .microblazeel => ".cfi_undefined r15",
.mips, .mipsel, .mips64, .mips64el => ".cfi_undefined $ra", .mips, .mipsel, .mips64, .mips64el => ".cfi_undefined $ra",
.or1k => ".cfi_undefined r9", .or1k => ".cfi_undefined r9",
.powerpc, .powerpcle, .powerpc64, .powerpc64le => ".cfi_undefined lr", .powerpc, .powerpcle, .powerpc64, .powerpc64le => ".cfi_undefined lr",
@ -346,6 +347,16 @@ fn _start() callconv(.naked) noreturn {
\\ lea %[posixCallMainAndExit] - . - 8, %%a0 \\ lea %[posixCallMainAndExit] - . - 8, %%a0
\\ jsr (%%pc, %%a0) \\ jsr (%%pc, %%a0)
, ,
.microblaze, .microblazeel =>
// r1 = SP, r15 = LR, r19 = FP, r20 = GP
\\ ori r15, r0, r0
\\ ori r19, r0, r0
\\ mfs r20, rpc
\\ addik r20, r20, _GLOBAL_OFFSET_TABLE_ + 8
\\ ori r5, r1, r0
\\ andi r1, r1, -4
\\ brlid r15, %[posixCallMainAndExit]
,
.mips, .mipsel => .mips, .mipsel =>
\\ move $fp, $zero \\ move $fp, $zero
\\ bal 1f \\ bal 1f